Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Cover memo for a report on Bosch and Scintilla Magnetos with attached heat test ribbons. | ||
| View original record | X.4187 U. To Hs. from Sft. Sft/JMW10/M20.8.30. Herewith copy of Mr. Ellis' report on the Bosch and Scintilla Magnetos. Also attached Heat Test Ribbons. -> in Misc. 5 Sft/JMW. | ||
| Scan002 | Test report and evaluation of the Scintilla Magneto 3786. | ||
| View original record | SCINTILLA MAGNETO 3786. A.M.6. -------------------------- This Magneto is very well made and is of the Inductor Type, the permanent magnet being combined with the revolving armature. It is an… | ||
| Scan003 | Unsuitability of the Scintilla Magneto Type AM6 for their engine and suggesting its return. | ||
| View original record | To By. from Hs. X 4187 Hs5/LG31.8.20. X.430. X.4187. RE SCINTILLA MAGNETO - TYPE AM6. During our last visit to Mr. Royce we showed to him the Swiss made Magneto. He agreed that they were excellent as… | ||
| Scan004 | The immediate return of Scintilla Magneto Type A.M.6 following a visit from a Brown Boveri Company representative. | ||
| View original record | X4184 BY/C6/H. 7. 9. 20. Hs. c. EFC. X.4184/ RE SCINTILLA MAGNETO - TYPE A.M.6. With reference to your Hs5/LG. 31. 8. 20. the representative from the Brown Boveri Company visited these Works this… | ||
| Scan005 | Letter from Brown, Boveri & Co. Limited regarding the trial of two Scintilla magnetos. | ||
| View original record | X 4184 Please address all communications to the Company. Brown, Boveri & Co. Limited ENGINEERS TELEGRAMS: REACTANCE,VIC,LONDON. TELEPHONE: VICTORIA 2538. CODE: WESTERN UNION. TEMPORARY OFFICES, 9, Old… | ||
| Scan006 | Letter from Brown, Boveri & Co. offering to sell two magnetos for destructive testing. | ||
| View original record | - 2 - Messrs. Rolls-Royce, Ltd. Scintilla Company - we are quite willing to sell these two magnetos to you, should you wish to test them to destruction or to put them through any special trials. We… | ||
| Scan007 | Returning two Scintilla magnetos to Messrs. Brown, Boveri & Co. Ltd. as their design was considered unsuitable. | ||
| View original record | X.4187 To Shipping Office. c. Despatch Stores. c. to C.O. EFC8/T9.9.20. X.4187 - SCINTILLA MAGNETOS. We are sending into the Stores for return to Messrs. Brown, Boveri & Co.Ltd., 9, Old Queen Street,… | ||
| Scan008 | Letter from Scintilla Limited offering starting and lighting equipment for motor cars. | ||
| View original record | X4187 SCINTILLA LIMITED, TRAFALGAR HOUSE, WATERLOO PLACE, LONDON. S/53/M. 12th March, 1921. Messrs. Rolls-Royce Ltd., Derby. Dear Sirs, X4290 (crossed out) X.4187 We should be obliged if you would let… | ||
| Scan009 | Letter from Scintilla Limited regarding the Paris Motor Exhibition. | ||
| View original record | SCINTILLA LIMITED. (Proprietors: BROWN, BOVERI & CO. LIMITED) Telephones: VICTORIA 6554. VICTORIA 6684. Telegrams: 'REACTANCE-CHARLES-LONDON.' TELEPHONES: REGENT 1952 - 1953. CODE: WESTERN UNION.… | ||
| Scan010 | Explaining why Scintilla magnetos were not tested, citing their design as too novel for use. | ||
| View original record | To BY/C. from EFC. X.4187 EFC3/T20.9.22. X.4187 - RE SCINTILLA MAGNETO Answering your pencil note, although we have had two Scintilla magnetos we did not put these through any tests owing to the fact… | ||
| Scan011 | Letter from Scintilla Limited regarding their products at the Paris Motor Exhibition. | ||
| View original record | Telephone: REGENT 1953. Telegrams: REACTANCE, LONDON. Please address all communications to the Company. Directors: G. BONER (Swiss), J. SCHNYDER (Swiss), A. C. EBORALL (Managing) SCINTILLA LIMITED.… | ||
| Scan012 | Letter to Scintilla Limited requesting dimensions and specifications for small six-cylinder magnetos. | ||
| View original record | R.R. 199 (250T) (SD576 19-7-17) MP18:855 X4184 EFC5/T. 22nd. November, 1922. Messrs. Scintilla Limited, Trafalgar House, Waterloo Place, London, S.W.1. Dear Sirs, We should be obliged if you would… | ||
| Scan013 | Letter from Scintilla Limited regarding the supply of magnetos and enclosing blueprints for various engine types. | ||
| View original record | X4187 Telephone: REGENT 1913. Telegrams: REACTANCE, LONDON. Please address all communications to the Company. Directors: G. BONER (Swiss) J. SCHNYDER (Swiss) A. C. EBORALL (Managing) SCINTILLA… | ||
| Scan014 | Concluding page of a letter from Scintilla Limited regarding automatic advance for an engine, with enclosures noted. | ||
| View original record | 2. Messrs. Rolls-Royce Limited. 23.11.22. automatic advance to come into operation, along with the engine speed at which you would require maximum advance. We are at your disposal for any further… | ||
| Scan015 | Letter from Scintilla Limited acknowledging a previous letter regarding magnetos. | ||
| View original record | X4187 Telephone: REGENT 1953. Telegrams: REACTANCE, LONDON. Please address all communications to the Company. Directors: G. BOWER (Swiss) J. SCHNYDER (Swiss) A. C. EBORALL (Managing) SCINTILLA… | ||
| Scan016 | Letter to Scintilla Ltd. regarding adapting a small AP6 magneto with automatic and hand advance. | ||
| View original record | R.R. 109 (250T) (SD676 19-7-17) M/180805 X4187 EFC3/T. 24th November, 1922. Messrs. Scintilla Ltd., Trafalgar House, Waterloo Place, London, S.W.1. Dear Sirs, We thank you for your letter S/97/BU in… | ||
| Scan017 | Letter discussing magneto requirements and engine specifications for two different engine sizes. | ||
| View original record | R. R. Coy (Derby) (1920) 2500-1-27 M1328/A Contd. -2- EFC3/T. We prefer to run with rather wide sparking plug gaps, viz. .025" and we would like the magneto to be capable of supplying sufficient… | ||
| Scan018 | Letter to Scintilla Limited confirming arrangements for the supply of magnetos and generator units. | ||
| View original record | x4187 c.Wal EFC2/T. 5th December, 1922. Messrs. Scintilla Limited, Trafalgar House, Waterloo Place, London, S.W.1. Dear Sirs, This is to confirm that as arranged during the visit of your Mr. W.G.Burne… | ||
| Scan019 | Suitability and testing of magnetos for the 20 HP car. | ||
| View original record | To BJ. from Hs. c. to FH. c. to HY. c. to Sg. X4167 Hs2/LGS.12.22. MAGNETO FOR 20 HP. CAR. X4167 X3551 You are aware, the reason we do not recommend a magneto for the 20 HP. is because up to the… | ||
| Scan020 | Use and testing of magnetos for 20 HP cars for export. | ||
| View original record | X4187 To Hs. from BJ. Copies to PN. Dy. Sg. BJ3/H11.12.22. [STAMP: Hs DEC 11 1922] MAGNETO FOR 20 HP. Car. Hs2/LG8.12.22. It is necessary that we send cars to certain countries with magnetos. As to… | ||
| Scan021 | Letter from Scintilla Limited regarding the supply of an AG6 automatic magneto and a 110W dynamo. | ||
| View original record | X.418.7. Telephone: REGENT 1953. Telegrams: REACTANCE, LONDON. Please address all communications to the Company. Directors: G. BONER (Swiss) J. SCHNYDER (Swiss) A. C. EBORALL (Managing) SCINTILLA… | ||
| Scan022 | Page 2 of a letter from Scintilla Limited, signed by the Contract Department. | ||
| View original record | 2. Messrs. Rolls-Royce, Ltd. 6.12.22. Assuring you of every attention, and at your disposal for any further information which you desire, We remain, Yours faithfully, SCINTILLA LIMITED. (Contract… | ||
| Scan023 | Letter to Scintilla Ltd. chasing a reply regarding an AG.6. Magneto & 110 Watt Dynamo. | ||
| View original record | X.4187 EFC1/T. 29th December, 1922. Messrs. Scintilla Ltd., Trafalgar House, Waterloo Place, London, S.W.1. Dear Sirs, Re AG.6. Magneto & 110 Watt Dynamo. We have not so far heard further from you… | ||
| Scan024 | Letter from Scintilla Limited confirming the dispatch of a Type AG6 Magneto and a 110-watt Dynamo. | ||
| View original record | X. 4187 - SCINTILLA LIMITED TRAFALGAR HOUSE, WATERLOO PLACE, LONDON, S.W.1. 30th Dec. 1922. EFCl/T. S/97/Bu (Handwritten Notes): X4187 14290 Messrs. Rolls-Royce Ltd., Nightingale Road, DERBY Dear… | ||
| Scan025 | Letter from Scintilla Limited confirming the dispatch of a Magneto type AG6-A. | ||
| View original record | X 4187 Please address all communications to the Company. Telephone: REGENT 1953. Telegrams: REACTANCE, LONDON. Directors: G. BONER (Swiss) J. SCHNEIDER (Swiss) A. C. EBORALL (Managing) SCINTILLA… | ||
| Scan026 | Test results for the Scintilla Magneto AG.6/A, detailing its automatic advance curve. | ||
| View original record | X.4787. 19.1.23. SCINTILLA MAGNETO AG.6/A. (AUTOMATIC ADVANCE). We find this magneto to Commence its automatic advance at 500 r.p.m. (Magneto speeds and advances throughout). Attain an advance of 6°… | ||
| Scan027 | Letter from Scintilla Limited regarding a new, weaker spring for a type AG-A magneto being tested. | ||
| View original record | X 4184 Telephone: REGENT 1983. Telegrams: REACTANCE, LONDON. Please address all communications to the Company. Directors: G. BONER (Swiss), J. SCHNYDER (Swiss), A. C. EBORALL (Managing) SCINTILLA… | ||
| Scan028 | Graph showing the automatic cam advance curve versus speed for a Scintilla AG6-H magneto. | ||
| View original record | AUTOMATIC ADVANCE OF CAM WITH SPEED ON SCINTILLA MAGNETO TYPE AG6-H 21528 TABLE: AUTOMATIC RANGE " 32.5°, 22° ON ENGINE HAND RANGE " 17.5°, 11.5° " " TOTAL = 50°, 33.5° " " Y-AXIS: CAM ADVANCE… | ||
| Scan029 | The reverse side of a document showing a Print Room receipt stamp from Derby. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM 23 JAN. 29 DERBY 4 | ||
| Scan030 | Extract discussing a test of a Scintilla magneto with automatic advance on a 20 HP car, and its comparison to other ignition systems. | ||
| View original record | X.4187 Extract from Hs2/LG23.2.23. When we were discussing the magneto with Mr. Royce, I had at W.W. a 20 h.p. car fitted with a Scintilla magneto which had an automatic advance. This magneto… | ||
| Scan031 | Letter to Scintilla Limited confirming arrangements and detailing issues with a 110-watt dynamo and regulator unit. | ||
| View original record | X4187 lud EFC2/T. 15th March 1923. Messrs. Scintilla Limited, Trafalgar House, Waterloo Place, London, S.W.1. Dear Sirs, X4187 X4290 Re Scintilla Dynamo & Regulator and Magneto. This is to confirm the… | ||
| Scan032 | Critiques of a cutout and regulator system, with arrangements for a replacement control unit and magneto. | ||
| View original record | KFC2/T. -2- Contd. became 25 volts or more. Thus in ordinary conditions of running it could never have come into action. (3) We found the cutout also to be a good deal late in being operated by its… | ||
| Scan033 | Concluding page of a letter to The Scintilla Co. Ltd. regarding the bulkiness of the AG.6 machine for a 20 HP engine. | ||
| View original record | To The Scintilla Co.Ltd. -3- EFC2/T. hand and automatic advance which you can possibly allow. It will be understood that the objection to the AG.6 machine is the bulkiness, making it appear rather… | ||
| Scan034 | Extract from a letter received from Scintilla Limited regarding the results of an AG6 magneto. | ||
| View original record | X.4187 COPY OF LETTER RECEIVED FROM:- SCINTILLA LIMITED, TRAFALGAR HOUSE, WATERLOO PLACE, LONDON, S.W.1. (Extract) 21st March 1923 EFC2/T S/97/Eu Messrs. Rolls-Royce Ltd. Re Magneto We were pleased to… | ||
| Scan035 | Letter from Scintilla Limited regarding a delay in the supply of type AM6-A magnetos. | ||
| View original record | X4184 Telephone: REGENT 1953. Telegrams: REACTANCE, PICCY, LONDON. Please address all communications to the Company. Directors: G. BONER (Swiss) J. SCHNYDER (Swiss) A. C. EBORALL (Managing) SCINTILLA… | ||
| Scan036 | Letter from Scintilla Limited confirming the dispatch of a type AM6-A magneto and apologising for a supply delay. | ||
| View original record | X4184 Telephone: REGENT 1953. Telegrams: REACTANCE, PICCY, LONDON. Please address all communications to the Company. Directors: G. BONER (Swiss) J. SCHNYDER (Swiss) A. C. EBORALL (Managing) SCINTILLA… | ||
| Scan037 | Instruction note regarding the dispatch of a magneto from Scintilla Ltd. | ||
| View original record | X. 4187 Hs. Wd/Dn3/HP17.5.23. Please note that we are this day instructing stores to send to you one magneto from Scintilla Ltd. No.26485, type AM6-A. Wd. [Signature] [Watermark: DICKINSON BOND] | ||
| Scan038 | Letter from Scintilla Limited confirming the arrangement to send a new type 110 W. dynamo for testing. | ||
| View original record | X4187 SCINTILLA LIMITED, WELLINGTON HOUSE, BUCKINGHAM GATE, LONDON, S.W.1. 22nd. October, 1923. S/97/Bu. Messrs. Rolls-Royce Ltd. Derby. VU290 X4187 For the attention of Mr. E. Fowler-Clerk. Dear… | ||
| Scan039 | Graph showing the automatic advance of the cam with speed for Sointilla magnetos, types AG8-A and AN8-A. | ||
| View original record | AUTOMATIC ADVANCE OF CAM WITH SPEED ON SOINTILLA MAGNETOS TYPES AG8-A and AN8-A X.4187 AG8-A { AUTOMATIC RANGE = 22°±½, 24° ON CRANK HAND RANGE = 17.5°, 35° E/O = 5°, 10° } AN8-A TC-75 { AUTOMATIC… | ||
| Scan040 | Performance data for a Scintilla Type AM6-A magneto with automatic advance. | ||
| View original record | X.4187. 30.1.24. X.4187 - SCINTILLA TYPE AM6-A MAGNETO. 26485 (AUTOMATIC ADVANCE) We find this magneto to Commence its automatic advance at 270 r.p.m. (magneto speeds and advances throughout) Attain… | ||
| Scan041 | Letter to Scintilla Ltd. requesting a control spring for an AM6-G Magneto to alter its automatic advance RPM. | ||
| View original record | X 4187 EFC2/LG. 31st. Jan. 1924. Messrs. Scintilla Ltd., Wellington House, Buckingham Gate, London. S.W.1. Dear Sirs, RE. AM6-G MAGNETO. 26485 With reference to the Magneto of the above type which we… | ||
| Scan042 | Testing lower compression pistons to reduce engine detonation on the EAC car. | ||
| View original record | R.R. 1014 (40 M) (SL 42 12-7-23). J.H., D. 4187 EXPERIMENTAL REPORT. Expl. No. 9040 4187 REF: Hs2/LG1.2.24. To R. from Hs. c. to CJ. RG. c. to E. DA. c. to EY. PN. c. to Wor. S E C R E T. PISTONS FOR… | ||
| Scan043 | Magneto's automatic advance and a starting handle mechanism. | ||
| View original record | R.R. 193A (40 M) (SL 42 12-7-23). J.H. D. -2- EXPERIMENTAL REPORT. Expl. No. 9040 REF: Hs2/LG1.2.24. Magneto. This magneto is quite a well-made machine and it has an automatic advance suitable for the… | ||
| Scan044 | Letter from Scintilla Limited regarding the inability to alter the rotation of an AM6-A magneto. | ||
| View original record | Telephone : VICTORIA 4985. Telegrams : REACTANCE, PICCY, LONDON. All communications should be addressed to the Company. Directors: G. BONER (Swiss) J. SCHNYDER (Swiss) A. C. EBORALL (Managing) X 4187… | ||
| Scan045 | Confirmation of a telegram from Scintilla Limited regarding the direction of rotation for an AM6 g Magneto. | ||
| View original record | CONFIRMATION OF TELEGRAMS. Telegraphic Address: REACTANCE, LONDON. 2nd February, 1924. Your Reference Our Reference S/97/Mt. From Scintilla Limited TRAFALGAR HOUSE, WATERLOO PLACE, LONDON, S.W.1.… | ||
| Scan046 | Letter to Scintilla Ltd. concerning the specifications for an AM6-A magneto. | ||
| View original record | X 4187 EFC3/LG. 4th. Feb. 1924. Messrs. Scintilla Ltd., Wellington House, Buckingham Gate, London, S.W.1. Dear Sirs, RE. AM6-A SCINTILLA MAGNETO. Answering your letter of the 2nd. inst. in which… | ||
| Scan047 | Letter from Scintilla Limited regarding particulars for a Magneto type AM6-A. | ||
| View original record | X 4187. Telephone : VICTORIA 4985. Telegrams : REACTANCE, PICCY, LONDON. Directors : G. BONER (Swiss) J. SCHNYDER (Swiss) A. C. EBORALL (Managing) All communications should be addressed to the… | ||
| Scan048 | Letter to Scintilla Ltd. chasing a response regarding a type AM6-A Magneto. | ||
| View original record | X4187 EFC1/LG. 13th. Feb. 1924. Messrs. Scintilla Ltd., Wellington House, Buckingham Gate, London, S.W.1. Dear Sirs, Scintilla Magneto - type AM6-A. We are anxiously awaiting the result of your… | ||
| Scan049 | Letter from Scintilla Limited regarding the Magneto type AM6-A. | ||
| View original record | X.4187. Telephone: VICTORIA, 4955. Telegrams: REACTANCE, PICCY, LONDON. All communications should be addressed to the Company. Directors: G. BONER (Swiss) J. SCHNYDER (Swiss) A. C. EBORALL (Managing)… | ||
| Scan050 | Letter from Scintilla Limited confirming the supply of a Magneto type AM6-A. | ||
| View original record | X. 4187. Telephone: VICTORIA 4985. Telegrams: REACTANCE, PICCY, LONDON. Directors: G. BOSER (Swiss) J. SCHNYDER (Swiss) A. C. EBORALL (Managing) All communications should be addressed to the Company.… | ||
| Scan051 | Letter from Scintilla Limited providing specifications for a type AM6-A magneto. | ||
| View original record | X. 4187 Telephone: VICTORIA 4985. Telegrams: REACTANCE, PICCY, LONDON. Directors: G. BONER (Swiss) J. SCHNYDER (Swiss) A. C. EBORALL (Managing) SCINTILLA LIMITED. (Proprietors: BROWN, BOVERI & CO.,… | ||
| Scan052 | Letter to Scintilla Ltd. detailing changes in magneto requirements, including rotation and advance curve. | ||
| View original record | X 4187. EFC2/LG. 23rd. Feb. 1924. Messrs. Scintilla Ltd., Wellington House, Buckingham Gate, London, SW1. Dear Sirs, We thank you for your letter dated 22nd. ref: S/97/Sh. in answer to our EFC3/LG.… | ||
| Scan053 | Letter from Scintilla Limited correcting the maximum advance RPM for Magneto type AM6-A. | ||
| View original record | X.4187 Telephone: VICTORIA 4985. Telegrams: REACTANCE, PICCY, LONDON. All communications should be addressed to the Company. Directors: G. BOSER (Swiss) J. SCHNYDER (Swiss) A. C. EBORALL (Managing)… | ||
| Scan054 | Letter from Scintilla Limited regarding a change in magneto specifications, specifically the maximum advance speed and the commencement speed of the automatic advance. | ||
| View original record | Telephone: VICTORIA 4985. Telegrams: REACTANCE, PICCY, LONDON. Directors: G. BONER (Swiss), J. SCHNYDER (Swiss), A. C. EBORALL (Managing) All communications should be addressed to the Company.… | ||
| Scan055 | Letter from Scintilla Limited regarding the dispatch of a Scintilla Magneto type AM6-A. | ||
| View original record | X. 4187. Telephone: VICTORIA 4985. Telegrams: REACTANCE, PICCY, LONDON. All communications should be addressed to the Company. Directors: G. BONER (Swiss) J. SCHNYDER (Swiss) A. C. EBORALL (Managing)… | ||
| Scan056 | Letter to Scintilla Limited regarding an issue with a supplied magneto and its rectification using parts from another. | ||
| View original record | x.4187. EFCl/T. 25th March 1924. Messrs. Scintilla Limited, Wellington House, Buckingham Gate, London, S.W.1. Dear Sirs, We have to thank you for the anti-clockwise rotation Scintilla magneto AM6-A,… | ||
| Scan057 | Letter from Scintilla Limited regarding the exchange of an AM6-A Magneto, clarifying the difference in its direction of rotation. | ||
| View original record | Telephone: VICTORIA 4985. Telegrams: REACTANCE, PICCY, LONDON. All communications should be addressed to the Company. Directors: G. BONER (Swiss), J. SCHNYDER (Swiss), A. C. EBORALL (Managing)… | ||
| Scan058 | Return of a clockwise Scintilla AM-6-A magneto after receiving an anti-clockwise version. | ||
| View original record | To Wd. from EFC. X4187 EFC2/T31.3.24. X:4187 - SCINTILLA AM-6-A MAGNETO. 34937 Having now received an anti-clockwise type AM6-A Scintilla magneto, we are now desirous of returning the original… | ||
| Scan059 | Specifications for the automatic advance of a Scintilla AM6-A Magneto with negative or anti-clockwise rotation. | ||
| View original record | X 4187 31.3.24. X.4187 - SCINTILLA AM6-A MAGNETO (NEGATIVE OR ANTI-CLOCKWISE ROTATION) AUTOMATIC ADVANCE. 34937 We find this magneto to Commence its automatic advance at 420 r.p.m. (magneto speeds and… | ||
| Scan060 | Letter to Scintilla Limited acknowledging an error regarding the direction of rotation for an AM-6-A magneto. | ||
| View original record | X.4187 EFCl/T. 31st March, 1924. Messrs. Scintilla Limited, Wellington House, Buckingham Gate, London, S.W.1. Dear Sirs, Thank you for yours of the 26th inst. with reference to the AM-6-A magneto.… | ||
| Scan061 | Scintilla magneto with anticlockwise rotation and its specifications. | ||
| View original record | X. 4187. To Hs/GWH. from EFC. EFC2/T31.3.24. X.4187 - SCINTILLA MAGNETO WITH ANTICLOCKWISE ROTATION. Herewith Scintilla magneto AM-6-A, No. 34937. The range and automatic advance of this magneto is in… | ||
| Scan062 | Specifications for the automatic advance of a Scintilla AM6-A magneto. | ||
| View original record | 31.3.24. X.4187 - SCINTILLA AM6-A MAGNETO (NEGATIVE OR ANTI-CLOCKWISE ROTATION) AUTOMATIC ADVANCE. 34937 We find this magneto to Commence its automatic advance at 420 r.p.m. (magneto speeds and… | ||
| Scan063 | Experimental record sheet for a Scintilla Magneto AM6-A, number 26485. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS. Scintilla Magneto AM6-A. N° 26485 X 4187 Date on: 23-5-23 Location: Lab. Date off: 31-3-24 Remarks: Recd from makers. Machine with positive rotation, and… | ||
| Scan064 | Instructions to return a R.H. Scintilla Magneto to Messrs. Scintilla Ltd and request credit if already invoiced. | ||
| View original record | X.4187 D/BP C. to My/Chat. C. to My/WEH. C. to EPC. Wd/Dn9/FH.1.4.23. Please despatch by passenger train, carriage paid to Messrs. Scintilla Ltd. 8 Lyall Mews, Eaton Square, London. S.W.1. one R.H.… | ||
| Scan065 | Notification regarding a Scintilla Magneto (No. 34937) with anticlockwise rotation fitted to chassis 93-NK. | ||
| View original record | X. 4187. To EFC/T25.4.24. X. 4187 - SCINTILLA MAGNETO. NO. 34937 WITH ANTICLOCKWISE ROTATION. We are to-day informed that this magneto has now been fitted to chassis 93-NK. EFC. | ||
| Scan066 | Form recording the design and performance details of a Scintilla AM6-A magneto. | ||
| View original record | X. 4187 -1- X.430. FORM FOR RECORDING DETAILS OF MAGNETO DESIGN AND PERFORMANCE. Date:- July. 13th 23. Magneto on test. Maker :- Scintilla. X. No. :- 4187. Type :- AM6-A. No :- 26485. (1) Weight in… | ||
| Scan067 | Specifications for an ignition distributor, including h.t. safety gap, platinum point gap, and contact breaker timing. | ||
| View original record | -2- Contd. (4) Length of h.t. safety gap (inches) :- .453 " " " " " (mm) :- 11.5 (5) Distributor :- Total pitch :- .960" Conductor width :- .195" Brushes in place of the usual segments. Brush width :-… | ||
| Scan068 | Results from endurance, volt-speed, and ampere-speed curve tests. | ||
| View original record | -3- Contd. (7). Endurance test :- Run with hand range retarded to obtain approx. central position. Rather heavy tracking on the drums carrying segments. Carbon dust deposited round brush-holders.… | ||
| Scan069 | Table of specifications for an automatic ignition advance mechanism. | ||
| View original record | 7A Automatic Advance. Total range:- 33° Advance commences:- 270 r.p.m. " finishes:- 3,300 " " Speed for advance of:- 5° = 800 " " 10° = 1160 " " 15° = 1600 " " 20° = 1900 " " 25° = 2250 " " 30° = 2750… | ||
| Scan070 | Test report page detailing results for short circuit, open circuit, and RPM tests. | ||
| View original record | -4- Contd. (10) Short circuit test :- O.K. (11) Open circuit test :- O.K (12) Test at 1500 R.P.M. O.K. (13) (a) 8.5 m.m. (b) 2.7 m.m. (c) 1.0 m.m. (d) .7 m.m. (14). Unobtainable. | ||
| Scan071 | High and low speed sparking characteristics and contact breaker performance. | ||
| View original record | -5- Contd. (15) High speed sparking characteristics :- 1 Max regular sparking gap for all high speeds:- (a) 6.5 mm (b) 8.5 mm (c) 9.5 mm 2 Shortcircuiting one gap extinguishes spark immediately… | ||
| Scan072 | Specification sheet detailing electrical resistance, current, point gaps, and contact breaker timing. | ||
| View original record | -6- Contd. (18) Primary resistance :- .311 w at 18.4 C Inst 92 on 1.5 volt + ampere ranges. (19) Secondary resistance :- 11,940 w at 20.5 C. Inst 92 on 15 volt range. " 22596 on m a range. (20)… | ||
| Scan073 | Specifications for platinum point gap, contact breaker timing, and armature core flux. | ||
| View original record | -7- Contd. (22b) Platinum point gap :- .008". Contact breaker timing:- | | Make. | Break. | |---|---|---| | A. | 17.5° | 100° | | R. | 69° | 152.5° | | | Retarded. | Advanced. | |---|---|---| | Make.… | ||
| Scan074 | Form for recording the design and performance details of a Scintilla A.M.6A magneto. | ||
| View original record | X. 4187. -1- X.430. FORM FOR RECORDING DETAILS OF MAGNETO DESIGN AND PERFORMANCE. Date:- 21 - 3 - 24 Magneto on test. Maker :- Scintilla X. No. :- 4187 Type :- A.M.6A. No :- 34937 (1) Weight in… | ||
| Scan075 | Ignition timing advance specifications, including a table of automatic advance versus engine speed. | ||
| View original record | Hand advance 20 1/2° Auto-matic Advance 32 1/2° Total Advance 53° Automatic advance commences at 420 R.P.M and finishes at 2750 R.P.M advance Speed 5° 850 R.P.M 10° 1160 " 15° 1600 " 20° 1850 " 25°… | ||
| Scan076 | Specifications for distributor, contact breaker timing, and platinum point gap. | ||
| View original record | -2- Contd. (4) Length of h.t. safety gap (inches) :- .465" " " " " (mm) :- 11.8 (5) Distributor :- Total pitch :- .940" Conductor width :- .195" (Handwritten: Brushes in place of the usual segments)… | ||
| Scan077 | Test report page detailing an endurance test, a primary volt-speed curve, and a primary ampere-speed curve. | ||
| View original record | -3- Contd. (7) Endurance test :- Run with the hand range retarded to obtain an approximate central position. Cam + rubbing block well lubricated. Tracking on rotor carrying segments and slight carbon… | ||
| Scan078 | Continued page of a report detailing the results of electrical circuit tests. | ||
| View original record | -4- Contd. (10) Short circuit test :- OK (11) Open circuit test :- Spark jumps occasionally from winding. Sparks also leak from H.T. Rotor to Gear Wheel. (12) Test at 1500 R.P.M. - OK (13) (a) 10.95… | ||
| Scan079 | High and low-speed sparking characteristics and contact breaker performance. | ||
| View original record | -5- Contd. (15) High speed sparking characteristics :- 1 Max regular sparking gap for all high speeds (a) 9.1 mm (b) 10.1 mm (c) 10.8 mm 2 Short-circuiting one gap extinguishes spark immediately… | ||
| Scan080 | Specification sheet detailing electrical resistance, point gaps, and contact breaker timings for a component. | ||
| View original record | -6- Contd. (18) Primary resistance :- .318 w at 16.5°C Instrument 98 on 1.5 volt and ampere ranges (19) Secondary resistance :- 12000 w at 16.5°C Instrument 98 on 15 volt range (20) Secondary… | ||
| Scan081 | Specifications for platinum point gap, contact breaker timing, and armature core flux. | ||
| View original record | -7- Contd. (22b) Platinum point gap :- ·010" Contact breaker timing:- Make. Break. A. 11° 93° R. 64° 145° Retarded. Advanced. Make. 64° 11° Break. 45° 93° Make. 244° 190° Break. 325° 273° (N.B… | ||
| Scan082 | Graph comparing the open-circuit volt-speed and short-circuit ampere-speed curves for the primary windings of three different magnetos. | ||
| View original record | X-127 OPEN-CIRCUIT VOLT-SPEED AND SHORT-CIRCUIT AMPERE-SPEED CURVES OF PRIMARY WINDINGS OF BOSCH.ZF6, SCINTILLA.AM6A AND WATFORD. RO1. MAGNETOS. O.C. VOLTS. S.C. AMPERES. SPEED R.P.M. Bosch ZF6 No.… | ||
| Scan083 | Suggesting the removal and laboratory testing of a Scintilla magneto, and proposing a Watford R.O.1 magneto as a replacement. | ||
| View original record | To Hs/TMW. from EFC. c. RHC+ X4187 EFC3/T9.5.24. X.4187 - SCINTILLA MAGNETO. It is suggested that immediately on return of 7-GII, the AG-6-A type Scintilla magneto be removed therefrom with a view to… | ||
| Scan084 | The bench testing of three Scintilla Magneto machines with automatic advance, types AG-6-A and AM-6-A. | ||
| View original record | To R. from EFC. c. CJ.. & PN. c. EY. EP. DAF c. E. EFCl/T9.5.24. X.4187 - SCINTILLA MAGNETOS TYPES AG-6-A AND AM-6-A (BOTH TYPES INCORPORATING AUTOMATIC ADVANCE). In all, three machines have been… | ||
| Scan085 | The testing and performance of Scintilla magnetos on various car chassis. | ||
| View original record | Contd. -2- EFCL/T9.5.24. requirements - as follows :- "When we were discussing the magneto with Mr. Royce "I had at W.W. a 20 H.P. car fitted with a Scintilla "magneto which had an automatic advance.… | ||
| Scan086 | Testing a magneto, its automatic advance characteristics, and application to a specific engine. | ||
| View original record | Contd. -3- EFC1/T9.5.24. The idea of testing this machine was the possibility of its application to the E.A.C., but for this purpose a magneto of negative or anti-clockwise rotation was required, and… | ||
| Scan087 | The experimental routine testing of a magneto, comparing its performance characteristics with other models. | ||
| View original record | -4- Contd. EFCl/T9.5.24. This magneto was also put through our experimental routine tests, with results recorded below, after which it has been fitted to EAC.III. chassis 93-NK and has done 453 miles… | ||
| Scan088 | Comparison of magneto distributor dimensions and H.T. safety gaps, including a sketch and data table. | ||
| View original record | Contd. -5- EFC1/T9.5.24. For other features of the design, see report FB.95. (3) The magnetic air gaps are unobtainable. (4) The length of H.T. safety gaps:- AM6-A. 26485. 11.5 mm. " 34937. 11.8 mm.… | ||
| Scan089 | Platinum point gaps and contact breaker timing for Scintilla and Watford magnetos. | ||
| View original record | Contd. -6- EFCL/T9.5.24. (6) The platinum point gaps on magnetos as received were :- Scintilla No.26485 .012" " No.34937. .013" Watford E06. .012" Contact Breaker Timing. Referring to the position… | ||
| Scan090 | Continuation of a test report on magnetos, detailing endurance, open-circuit, and short-circuit test results. | ||
| View original record | Contd. -7- EFC1/T9.5.24. We found the above gaps and timing mkkx to be very little altered after our tests, and also very little affected by varying the platinum gap ± .004". An endurance test,… | ||
| Scan091 | Report page detailing magneto safety gap, high tension discharge, and utility leakage tests. | ||
| View original record | Contd. -8- EFCl/T9.5.24. safety gaps of the magnetos, also went through suffessfully on all these machines, except that on the second Scintilla (with larger armature capacity) sparks were observed… | ||
| Scan092 | Test report on the high and low-speed sparking characteristics of various magnetos. | ||
| View original record | Contd. -9- EFC1/T9.5.24. (a) (b) (c) (d) Safety gap. Scintilla No.26485. 8.4 2.7 1.0 .7 11.5 mm. Scintilla No.34937. 10.95 6.75 2.4 1.15 11.8 Watford EO6. 6.5 5.3 3.5 2.4 8.5 (N.B. The figures for the… | ||
| Scan093 | Page detailing electrical resistance and current measurements for different magnetos. | ||
| View original record | Contd. -10- EFCl/T9.5.24. (18) & (19) Primary and secondary resistances. 1st. Scintilla. .31 ohm at 18.5°C and 11940 ohms at 20.5°C 2nd. " .32 ohm and 12000 ohms at 16.5°C. EO6 Watford .53 ohm and… | ||
| Scan094 | Test results for Scintilla magnetos detailing automatic advance angles at various speeds. | ||
| View original record | 19.1.23. SCINTILLA MAGNETO AG-6-A. (AUTOMATIC ADVANCE) We find this magneto to Commence its automatic advance at 500 r.p.m. (Magneto speeds and advances throughout). Attain an advance of 5° at 1150… | ||
| Scan095 | Preliminary report on the Scintilla Magneto Type AM6-A. | ||
| View original record | To EFC. PB.95. May 28th 1923. PRELIMINARY REPORT ON SCINTILLA MAGNETO TYPE AM6-A. Although very different in design, the principles (apart from the automatic advance fitted) involved in this magneto,… | ||
| Scan096 | Investigation into the sources of noise from a Scintilla AM-6-A magneto. | ||
| View original record | EFC. COPY. 6.3.24. WA.11. X.4187 - INVESTIGATION OF NOISE ON SCINTILLA AM-6-A MAGNETO. To facilitate the analysis of the noise emanating from this magneto, the distributor and contact breaker was… | ||
| Scan097 | Graph showing the automatic advance of cam with speed for Scintilla Magnetos, types AG6A and AM6A. | ||
| View original record | AUTOMATIC ADVANCE OF CAM WITH SPEED ON SCINTILLA MAGNETOS TYPE'S AG6A AND AM6A. Left Axis: CAM ADVANCE (DEGREES) Columns: Distributor, Engine, Magneto Armature Values: 14, 28, 42 12, 24, 36 10, 20, 30… | ||
| Scan098 | Graph of open circuit volt-speed and short circuit ampere-speed curves for the primary windings of Scintilla and Watford magnetos. | ||
| View original record | WATFORD E06 No 50410 VOLTS AMPERES. SCINTILLA AM6A No 34937 SCINTILLA AM6A No 26485 OPEN CIRCUIT VOLT-SPEED AND SHORT CIRCUIT AMPERE-SPEED CURVES OF PRIMARY WINDINGS OF SCINTILLA AM6A, AND WATFORD… | ||
| Scan099 | The bench tests conducted on a Scintilla Magneto Type AG-6-A. | ||
| View original record | V4187 To R. & E. from EFC. c. O.J. & F.N. c. EY. EP. DA. EFC4/T15.5.24. X.4187 - SCINTILLA MAGNETO TYPE AG-6-A. (Sequel to report EFC1/T9.5.24). Certain bench tests of this magneto have been made… | ||
| Scan100 | Test report for a Scintilla magneto AG.6A, detailing its slow and high-speed sparking characteristics. | ||
| View original record | RR 238(150 BKS.)(SH57.29-6-20.) MP 224358 X.4187 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.b. 15-5-1924 Order No. W.A.29 Customer's No. X 4187 Scintilla magneto AG.6A off- 7G 11 This magneto has been… | ||
| Scan101 | Decision by Mr. Royce to use a governed Scintilla magneto and LeC. 1849 switchbox on the EAC.2. engine, with a request for dimensions. | ||
| View original record | X4187 TO EY. FROM E. SECRET. EL/M24.5.24. Copy to HS. E. A. C. 2. x9790 x9730 SWITCHBOX & MAGNETO. X.4187 With reference to the above Mr. Royce has decided that we ought to use a governed Scintilla… | ||
| Scan102 | Performance requirements for two Scintilla magnetos for the EAC.II engine. | ||
| View original record | X8790 To Wd. from EFC. c. Ey. c. Hs. EFCL/T26.5.24. X.4181 - SCINTILLA MAGNETO. X8790 In view of El/M24.5.24 and other considerations, it is considered desirable at this point to obtain two further… | ||
| Scan103 | Continued discussion on altering a magneto to achieve greater advance and drafting specifications for manufacturers. | ||
| View original record | Contd. -2- EFC1/T26.5.24. We should like them to alter the machine to have, if possible, a greater advance (as now required) than is possessed by magneto No.34937 at present in our possession. A… | ||
| Scan104 | Performance of a Scintilla magneto in relation to E.A.C.2 engine requirements. | ||
| View original record | To R. from EFC. c. CJ. HY. HS. X8790 SECRET EFC2/T26.5.24. X.9790 - MAGNETO FOR E.A.C.2. X4187 With reference to E1/M24.5.24, the AM-6-A Scintilla magneto, exemplified by magneto No.34937, (the… | ||
| Scan105 | Comparison of Scintilla and Watford magneto performance, particularly regarding slow-speed sparking characteristics. | ||
| View original record | Contd. -2- EFC2/T26.5.24. In one respect the Scintilla magneto is short of an important feature which is possessed by the Watford E.O.6. We refer to the fact that owing to the use of the movable… | ||
| Scan106 | Requirements for a Scintilla Magneto for an EAC.II engine. | ||
| View original record | To Wd, from EFC. c. By. c. Hs. X.4187 EFCL/T26.5.24. X.4181 - SCINTILLA MAGNETO. In view of El/M24.5.24 and other considerations, it is considered desirable at this point to obtain two further… | ||
| Scan107 | Magneto specifications and a request for information from Scintilla Co. | ||
| View original record | Contd. -2- EFC1/T26.5.24. We should like them to alter the machine to have, if possible, a greater advance (as now required) than is possessed by magneto No.34937 at present in our possession. A… | ||
| Scan108 | Decision to use a governed Scintilla Magneto on EAC.11 engines and outlining testing procedures. | ||
| View original record | Mr. Hancock from Hs. c. to EFC. X 4187 Hs2/LG27.5.24. X 4187 X 9790 MAGNETOS. It has now been decided by R. that we should use a governed Scintilla Magneto on the EAC.11. engines. We ought, therefore,… | ||
| Scan109 | Specification of magneto for 40/50 car. | ||
| View original record | X4187 To Hs. from EFC. EFC1/T27.5.24. X9490 SPECIFICATION OF MAGNETO FOR 40/50 CAR. X4187 The 3,300 r.p.m. is of course the magneto armature speed. You will remember that we settled this point before,… | ||
| Scan110 | Meeting about magneto design and automatic advance mechanisms for the E.A.C. project. | ||
| View original record | To Hs. from EFC. c. Mr. Hancock. c. E. S E C R E T. EFC2/T27.5.24. E.A.C. X.9790 - MAGNETO FOR E.A.C. Mr. Watson of the M.L. Company duly came yesterday but not Mr. Lister. I got on quite well with… | ||
| Scan111 | Procurement and testing of Scintilla AM-6-A magnetos for an EAC.2 test engine. | ||
| View original record | Contd. -2- EFC2/T27.5.24. Immediately on seeing Mr. Elliott's note we had written and instructed Wd. to order two more negative rotation Scintilla AM-6-A magnetos for EAC.2. and I do not think it… | ||
| Scan112 | Safety spark gap specifications, breakdown voltage, and magnetos, with notes on visits from suppliers. | ||
| View original record | Contd. -3- EFC2/T27.5.24. One of the things Mr. Watson said was that he considered the safety spark gap should be specified in breakdown voltage, and he suggested the figure of 12000 volts. He said it… | ||
| Scan113 | The fitting of a Scintilla magneto to a test engine for experiments. | ||
| View original record | X8795 To RHC. from EFC. c.Hs/GWH. EFC3/T28.5.24. X.4187 - SCINTILLA MAGNETO TYPE AG-6-A No.21523. We are handing you herewith the above magneto. Will you kindly, in accordance with Mr. Hancock's… | ||
| Scan114 | Correspondence regarding Scintilla magnetos, enclosing a letter, blueprints, a booklet, and discussing pricing. | ||
| View original record | X.4187. EFC.from Wd. c.to By c.to Hr. Wd9/NJ29.5.24. X.4187 - Scintilla Magneto. Referring to EFC1/T26.5.24, I send you (EFC) herewith original letter from Scintilla Ltd. dated 28th inst., together… | ||
| Scan115 | Letter discussing the specifications and ordering of Scintilla magnetos, types AM-6 and AG-6. | ||
| View original record | To Wd. from EFC. X4187 EFC3/T30.5.24. X.4187 - SCINTILLA MAGNETOS. Answering your Wd9/NJ29.5.24, I acknowledge the receipt of the letter from Messrs. Scintilla, dated 28th inst., together with… | ||
| Scan116 | Expediting the acquisition of two magnetos from Scintilla, even if not to the final specification. | ||
| View original record | Contd. -2- EFC3/T30.5.24. On further consideration we should like you to say to Messrs. Scintilla that we would prefer them not to spend any appreciable time in getting the two magnetos now on order… | ||
| Scan117 | Tender from Scintilla Limited regarding the supply and specifications of magnetos. | ||
| View original record | COPY OF LETTER RECEIVED FROM:- SCINTILLA LIMITED, Wellington House, Buckingham Gate, London, S.W.1. Wd9/NJ26524. S/97/Bu. TENDER NO.12386. 28th May, 1924. Messrs. Rolls-Royce Ltd., Derby. Dear Sirs,… | ||
| Scan118 | Page 2 of a letter from Scintilla Limited concerning the supply of magnetos, including delivery, payment terms and enclosed documents. | ||
| View original record | -2- Contd. The above price includes packing and delivery to your address. Delivery. We estimate, without liability, that we could supply these two machines within 2-3 weeks from date of receipt of… | ||
| Scan119 | Extract regarding the use of a Scintilla magneto (type AM6A) to complete the electrical equipment. | ||
| View original record | X4187 Extract from R3/M4.6.24. (Sent under cover of RS1/M6.6.24), (See X,9960). "MAGNETO. X,9790. X.4187. This with the smaller type of governed Scintilla magneto (type AM6A) completes the electrical… | ||
| Scan120 | Letter from Scintilla Limited regarding the particulars, price, and delivery of the type AG6-A magneto. | ||
| View original record | Telephone: VICTORIA 4985. Telegrams: REACTANCE. PICCY, LONDON. All communications should be addressed to the Company. SCINTILLA LIMITED. (Proprietors: BROWN, BOVERI & CO. LIMITED.) MAGNETOS - DYNAMOS… | ||
| Scan121 | Extract regarding the use of a smaller Scintilla AM6A magneto to complete the electrical equipment. | ||
| View original record | X8795 Extract from R3/M4.6.24. (Sent under cover of RS1/M6.6.24) (See X,9960). "MAGNETO. X,9790. X.4187. This with the smaller type of governed Scintilla magneto (type AM6A) completes the electrical… | ||
| Scan122 | Communication confirming agreement on the description of Scintilla magnetos. | ||
| View original record | 18795 To Wd. from EFC. EFC2/T5.6.24. X. 4187 - SCINTILLA MAGNETOS. Answering your Wd12/NJ5.6.24, we are in agreement with the description of the Scintilla magnetos given in the letter attached… | ||
| Scan123 | Letter concerning an order for two Scintilla Magnetos, type AM-6-A. | ||
| View original record | EFC. from Wd. X8795 Wd12/NJ5.6.24. X.4181 - Scintilla Magnetos. Referring to EFC3/T30.5.24, I confirm having already sent you a letter from Scintilla Ltd. dated 3rd inst. stating they have written to… | ||
| Scan124 | Acceptance of order from Scintilla Limited for two type AM6-A magnetos. | ||
| View original record | Telephones: VICTORIA 4883 Telegrams: ACTANCE PICCY, LONDON All communications should be addressed to the Company SCINTILLA LIMITED. (Proprietors: BROWN, BOVERI & CO., LIMITED) MAGNETOS - DYNAMOS -… | ||
| Scan125 | Letter from Scintilla Limited regarding their inability to supply Magnetos type AM6-A as per the original order. | ||
| View original record | Telephone: VICTORIA 4985. Telegrams: REACTANCE, PICCY, LONDON. Directors: G. BORER (Swiss) J. SCHNYDER (Swiss) A. C. EBORALL (Managing) Handwritten: X8795 All communications should be addressed to the… | ||
| Scan126 | Scintilla Ltd.'s inability to make alterations to an order for type AM-6-A magnetos. | ||
| View original record | EFC.from Wd. 8795 Wd1/NJ11.6.24. X.4187 - Scintilla Magnetos. I received your note EFC2/T5.6.24 stating you were in agreement with the description of the magnetos given in the letter from Scintilla… | ||
| Scan127 | Confirming an order for Scintilla magnetos and inquiring about their suitability for the AG-6-A machine. | ||
| View original record | X. 8795 To Wd. from EFC. EFC1/T11.6.24. X.4187 - SCINTILLA MAGNETOS. Answering your Wd1/A11.6.24, the order for two Scintilla type AM-6-A magnetos should be proceeded with and the magnetos obtained at… | ||
| Scan128 | Letter from Scintilla Limited acknowledging an order for two magnetos and enclosing a blueprint for the AG6-A model. | ||
| View original record | Telephone: VICTORIA 4985. Telegrams: REACTANCE, PICCY, LONDON. All communications should be addressed to the Company. Directors: G. BONER (Swiss) J. SCHNYDER (Swiss) A. C. EBORALL (Managing) X8795… | ||
| Scan129 | Enclosure from Scintilla Limited regarding order number 30661. | ||
| View original record | Enclosure to our letter of 16th June, 19 24. To Messrs. Rolls-Royce, Ltd. Subject Your Order No. 30661, dated 31.5.24. Reference Wd14/NJ11624. From SCINTILLA LIMITED, Wellington House, Buckingham… | ||
| Scan130 | Graph comparing specified and proposed automatic timing curves for a 40/50HP 6-cylinder motor. | ||
| View original record | specified automatic timing curve Proposed deg. Spring No MA 4563 Sleeve No MA 4554 Pos 105 Tapered Bush No 4668 2330 rpm 2330 Hand timing 20° Automatic timing range 40° SCINTILLA SOCIÉTÉ ANONYME… | ||
| Scan131 | Dispatch of Scintilla magnetos from Switzerland and an attached blueprint. | ||
| View original record | EFC.from Wd. X8795 Wd1/NJ17.6.24. X.4187 - Scintilla Magnetos. Referring to yours EFC1/T11.6.24, I attach hereto letter from Scintilla Ltd. dated 16th inst. from which you will note that they will… | ||
| Scan132 | Chasing the delivery of two Scintilla magnetos. | ||
| View original record | X-8795 To Wd. from EFC. EFC2/T28.6.24. X. 4187 - SCINTILLA MAGNETOS We have not yet received the two Scintilla magnetos, last referred to in your Wd1/NJ17.6.24. We trust that everything is being done… | ||
| Scan133 | Instructions regarding a noisy Scintilla magneto type A.G.6A, number 21523. | ||
| View original record | RR 239 (50 BKS) (SH57.29-6-20.) MP 224358 X. 8795. ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.7b. Order No: W.A. 56 Customer's No: XH187 Scintilla magneto type A.G.6A NO. 21523. This magneto has now been… | ||
| Scan134 | Instructions for overhauling a Scintilla magneto, fitting new bearings and repairing the distributor drum. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. RR 238 (150 BKS.) (SH57. 28-6-20.) MP 224359 To 19 Order No. Customer's No. the Scintilla bo. to be thoroughly overhauled and new bearings fitted, also to have the drum… | ||
| Scan135 | Order of a Scintilla Magneto model AG-6-A with specific rotation requirements. | ||
| View original record | To Wd. from EFC. X 8795 EFC6/T4.7.24. X.4187 - SCINTILLA MAGNETO. Will you kindly order up from Messrs. Scintilla one of the larger size magneto AG-6-A, this to be of similar rotation to the two that… | ||
| Scan136 | With a graph comparing the hand control characteristics of Scintilla magneto and R.R. battery ignition systems. | ||
| View original record | X.8795 SECRET To E. & Hs. from R. c. CJ. BJ. Wgr. c. Rg. By. EFC. c. Da. PN. RL/M14.7.24. E.A.C.II. IGNITION. SCINTILLA MAGNETO & R.R. BATTERY. X.9780. X.9790. X.4187. It was pointed out that by… | ||
| Scan137 | Instructions detailing the automatic advance and hand range characteristics for Scintilla Magnetos. | ||
| View original record | ROLLS-ROYCE, LTD. INSTRUCTIONS. To E.Y.B. Order No. W.A.62. Customer's No. X 4187 Auto-matic advance characteristics and hand ranges of Scintilla Magnetos type AM6A (Negative rotation) Nos. 28531 and… | ||
| Scan138 | Instructions detailing the automatic advance curve specifications for a magneto. | ||
| View original record | 2M 233(30 BKS) [SHST.29-6-20.] MP 224350 ROLLS-ROYCE LTD. INSTRUCTIONS. To 19 Order No. Wa 62 (2) Customer's No. No. 28533. This magneto commences its auto-matic advance at a speed of 580 r.p.m and… | ||
| Scan139 | Telegram requesting a sample of Scintilla governed magnetos. | ||
| View original record | POST OFFICE TELEGRAPHS. Handwritten references: V9795 X4187 Office Stamp: DERBY, 1 CJUL24 No. of Telegram: 0210 Handed in at: 4.9 M. Office of Origin: Chichester T. Words: 10 Received here at: 4 45 M.… | ||
| Scan140 | Instructions for bench tests on Scintilla magnetos type AM6A. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. X.8795 To E.Y.B. Date 16-7-1924 Order No. W.A.64 Customer's No. X.4187 Bench tests on Scintilla magnetos type AM6A (negative rotation) NOS 28531 and 28533. Tests, partly… | ||
| Scan141 | Results for a series of electrical circuit and utility tests on a component. | ||
| View original record | RR 238 (150 BKS) (BH57-29-6-20.) MP 224355 ROLLS-ROYCE LTD. INSTRUCTIONS. 19 To Order No. W.A. 64 (2) Customer's No. IV Short circuit test (30 mins at 1500 rpm) OK. V open circuit test (15 min at 1500… | ||
| Scan142 | Instruction sheet detailing results for low-speed sparking and various circuit tests. | ||
| View original record | RR 238 (100 BKS.) (BH57. 29-6-20.) MP 22435R ROLLS-ROYCE LTD. INSTRUCTIONS. To 19 Order No. W.a-b4 (3) Customer's No. VII. Low speed sparking a. Fully advanced. 140 rpm b. Central position 190 rpm c.… | ||
| Scan143 | Test results for a magneto, detailing spark gap data, low-speed sparking performance, and a noise comparison. | ||
| View original record | RR 238 (150 BKS.) (BH57.29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To ________________________ 19 Order No. W.A.64 (4) Customer's No. __________ a 10.2 mm b. 4.3 mm c. 2.0 mm d. .5 mm. with… | ||
| Scan144 | The dispatch of a Scintilla magneto for inspection. | ||
| View original record | To CHAT. from EFC. c. Shipping Office. X8795 EFCl/T17.7.24. X.4187 - RE SCINTILLA MAGNETO Herewith please receive 1 Scintilla magneto type AM-6-A. No. 28533. Will you kindly despatch this (to Shipping… | ||
| Scan145 | Works order for the urgent despatch of a Scintilla Magneto for inspection, addressed to Mr. Elliott c/o F.H. Royce Esq. | ||
| View original record | R.R. 615B (50T Sets.) (SE 592 13-3-18) MP 19085 y E.J.b. x 8795 73333 WKS. ORDER No. CHASSIS No. 17th. July 1924 191 Customer's Order No. EFC1/T17.7.24 Customer's No. Owner's Name Customer: Mr.… | ||
| Scan146 | The supply and performance of a Scintilla Magneto Type AM-6-A for the EAC.II engine. | ||
| View original record | X4187 To E. from EFC. EFC5/T17.7.34. X.4187 - SCINTILLA MAGNETO TYPE AM-6-A, LEFT HAND ROTATION SUITABLE FOR EAC.II. We are, in accordance with your telegram, sending you under separate cover one of… | ||
| Scan147 | Fitting a Scintilla Magneto type AM-6-A to chassis 93-NK and its performance characteristics. | ||
| View original record | X 4187 18.7.24. Hs/GWH. X.4187 - SCINTILLA MAGNETO TYPE AM-6-A, No.28531. (Negative rotation). Will you please arrange to have the above magneto fitted to chassis 93-NK. The low speed sparking we… | ||
| Scan148 | The performance of a Scintilla AM-6-A magneto, which is not meeting specification. | ||
| View original record | To E from EFC. X4187 EFC2/T19.7.24. SCINTILLA AM-6-A MAGNETO - LEFT HAND ROTATION - SUITABLE FOR EAC.11. X4187 X9790 Further to our EFC5/T17.7.24, in which we stated we were sending to you a magneto… | ||
| Scan149 | Fitting of a Scintilla type AM-6-A Magneto to component 93-NK. | ||
| View original record | X.4187. 19.7.24. X.4187 - SCINTILLA TYPE AM-6-A MAGNETO No. 28531 - NEGATIVE ROTATION. The above magneto has been fitted to 93-NK in accordance with EFC/HEW's note of 18.7.24. EFC. EFC. | ||
| Scan150 | Explaining the decision not to use the Scintilla magneto on the EAC.2 vehicle. | ||
| View original record | X4187 EFC. To Hs. from R. By c. CJ. BJ. S E C R E T. RL/M24.7.24. E.A.C. RE MAGNETOS. X.4187. X.9790. X.430. For the following reasons we have decided that the Scintilla magneto had better not be used… | ||
| Scan151 | List detailing the particulars and present locations of various Scintilla magnetos. | ||
| View original record | X. 8798. EFC3/T14.8.24. X.4187 - PARTICULARS AND PRESENT LOCATIONS OF VARIOUS SCINTILLA MAGNETOS. (All negative rotation except AG6-A No.21523) Type. No. Location. Remarks. AG6-A 21523. Lab. This… | ||
| Scan152 | Instructions detailing the automatic advance characteristics of a Scintilla magneto, type AQ6A. | ||
| View original record | RR 238 (100 BKS) (SH57.29-6-20.) MP 224358 X 87935 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.Y.C. Date: 22-8-1924 Order No. WA 73 Customer's No. X 4187 Auto-matic advance characteristics of Scintilla… | ||
| Scan153 | Requesting the fitting of a Scintilla magneto to a new EAC.2 engine for chassis 93-NK. | ||
| View original record | X8795 To RHC. from EFC. EFC1/14.9.24. X.4187 - SCINTILLA MAGNETO TYPE AG-6-A. No.34903. Herewith we hand to you Scintilla magneto of the larger type. Would you kindly arrange to have this fitted to… | ||
| Scan154 | Form recording the design and performance details of a magneto. | ||
| View original record | X. 8795 -1- X.430. FORM FOR RECORDING DETAILS OF MAGNETO DESIGN AND PERFORMANCE. Date:- 21-8-24. Magneto on test. Maker :- Scintilla. X. No.:- 4187. Type :- AG6A. No :- 34903. (1) Weight in pounds.… | ||
| Scan155 | Specification sheet detailing measurements for H.T. safety gap, distributor, platinum point gap, and contact breaker timing. | ||
| View original record | -2- . Contd. (4) Length of H.T. safety gap (inches) :- .442 " " " " " (mm.) :- 11.2 (5) Distributor :- Total pitch :- 1.06" Conductor width :- .195" Brush width :- .562" (advanced auto) .09" Position… | ||
| Scan156 | Endurance test results with primary volt-speed and ampere-speed curve data. | ||
| View original record | -3- Contd. (7) Endurance test :- H.T. sparking OK. Contact breaker cam and rubbing block well lubricated. General condition OK. (8) Primary volt-speed curve :- Speed. Volts. Volts/Speed. 400 2.0 800… | ||
| Scan157 | Test report page detailing the results of short circuit, open circuit, and RPM tests, along with measurements and sparking speed data. | ||
| View original record | Contd. -4- (10) Short circuit test :- OK (11) Open circuit test :- Safety gap too large. (12) Test at 1500 R.P.M. :- OK (13) (a) 10.7 m.m. (b) 2.7 m.m. (c) 2.3 m.m. (d) 1.1 m.m. With 3.5 annular gap… | ||
| Scan158 | High and low speed sparking characteristics and the flinging of the contact breaker. | ||
| View original record | -5- (15) High speed sparking characteristics :- OK. (16) Low speed sparking characteristics :- Speeds :- (a) 160 rpm (b) 220 " (c) 290 " (17) Flinging of contact breaker at high speed :- Contd. | ||
| Scan159 | Specification sheet detailing electrical resistance, current, point gaps, and contact breaker timing. | ||
| View original record | -6- Contd. (18) Primary resistance :- .34 ohms at 13°C (Instrument NO 98 on 1.5 volt and ampere ranges) (19) Secondary resistance :- 6375 ohms at 15°C (Instrument NO 98 on 1.5 volt range Instrument NO… | ||
| Scan160 | Specifications for platinum point, contact breaker timing, and armature core flux. | ||
| View original record | -7- (22b) Platinum point :- .008" Contact breaker timing:- (Table 1) Make. Break. A. 14° 102° R. 71° 159.5° (Table 2) Retarded. (Auto + Hand) Advance.d. Make. 66° 9° Break. 159° 101.5° Make. 256° 199°… | ||
| Scan161 | Graph of the open and short circuit performance curves for the primary winding of a Scintilla AG6A Magneto. | ||
| View original record | O.C. VOLTS. S.C. AMPERES. SPEED R.P.M. AMPERES. VOLTS. OPEN CIRCUIT VOLT-SPEED AND SHORT CIRCUIT AMPERE-SPEED CURVES OF PRIMARY WINDING OF SCINTILLA AG6A MAGNETO No 34903. | ||
| Scan162 | Table of magneto performance data to new general specifications, incorporating automatic advance. | ||
| View original record | E.F.C. V4187 * X. 430. TABLE OF MAGNETO PERFORMANCE TO NEW GENERAL SPECIFICATION. (INCORPORATING AUTOMATIC ADVANCE). | Date of test. | Make. | MAGNETO. Type. | No. | (1) Weight (lbs). ->15 | (2)… | ||
| Scan163 | Comparison report on the Scintilla Magneto Type AG-6-A (Larger Type), detailing its specifications against smaller models. | ||
| View original record | To R. & E. from EFC. c. CJ. & FN. c. EY. EP. Da. X8795 EFC2/T4.9.24. X. 4187 - SCINTILLA MAGNETO TYPE AG-6-A (LARGER TYPE) NO. 34903. (Adapted by Messrs. Scintilla more nearly to comply with our… | ||
| Scan164 | Test report on a Scintilla magneto, detailing its performance characteristics and fitment to a new engine for chassis 93-NK. | ||
| View original record | Contd. -2- EFC2/T4.9.24. (8) On the open circuit test, there is a tendency for the discharge to take place at places other than the safety gap. This feature is common to all the Scintilla magnetos… | ||
| Scan165 | Table of magneto performance test results, incorporating automatic advance. | ||
| View original record | X.430. TABLE OF MAGNETO PERFORMANCE TO NEW GENERAL SPECIFICATION. (INCORPORATING AUTOMATIC ADVANCE). Date of Test. | MAGNETO. Make. Type. No. | (1) Weight (lbs). | (2) Safety gap (mms) (+-12000 V) | +… | ||
| Scan166 | Confirming the fitting of Scintilla Magneto No. 28531 to the EAC.II test engine. | ||
| View original record | EFC. X.4187. 24.10.24. SCINTILLA MAGNETO No.28531. (AM6A) This magneto has now been fitted to the EAC.II test engine at present undergoing tests. HEW. | ||
| Scan167 | Fitment of a Scintilla Magneto, type AG-6-A, No. 34903. | ||
| View original record | X 8795 To EFC from RHC. RHC4/EU 13. 11. 24. X 4187 - SCINTILLA MAGNETO TYPE AG-6-A. NO 34903. This magneto is fitted to 2 EAC 11 unit which is now in 93 NK. RHC. | ||
| Scan168 | Recommendation to prepare for fitting a Scintilla magneto alongside standard battery ignition on 'V' series cars. | ||
| View original record | X8795 Extract from Hsl/LG22.12.24. X.8685. EAC. 'V' SERIES X.8790 X.4187. We recommend that we prepare, so that we can, if necessary fit the governed Scintilla magneto and the standard battery… | ||
| Scan169 | Mileage accumulated by various Scintilla magneto units. | ||
| View original record | EFC. X8795 28.1.25. MILEAGE OF SCINTILLA MAGNETOS TO DATE. No. Type. Particulars and miles run. 34937 AM6A Run 9742 miles on 46-PK‡ 28531 AM6A Run 3192 miles on 93-NK and is doing a considerable… | ||
| Scan170 | Different ignition control schemes and magnetos for the 'V' series engine. | ||
| View original record | HS. E.) DA. EY.) from R. OJ. BJ.) PN. CWB.) x8795 SECRET. RL/M31.1.25. E. A. C. 'V' SERIES IGNITION CONTROL. X.8685. X.4187. X.8680. X.8690. I have written at various times my reasons for this scheme,… | ||
| Scan171 | Typed memorandum discussing anxieties over potential engine detonations using two separate governors and wide-apart plugs. | ||
| View original record | Contd. -2- R1/M31.1.25. sufficiently reliable - my only anxiety. In the case of 2 separate governors one may act more quickly, and also both may be somewhat erratic and cause inexplicable detonations… | ||
| Scan172 | Electrical experimental record sheet for a Scintilla Magneto, model AG-6-H No 21523. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEET. y418/ Scintilla Magneto. AG-6-H N.o 21523 X. No. 4187 Date on. Location. Date Off. Remarks. Miles reading. start Miles reading. finish Miles covered. Total miles.… | ||
| Scan173 | Electrical experimental record sheet for a Scintilla Magneto, type a.m.6.a, serial number 28531. | ||
| View original record | Header: ELECTRICAL EXPERIMENTAL RECORD SHEETS. Top Right: X4187 Subject: Scintilla Magneto type a.m.6.a NO 28531 Table Columns: Date on., Location., Date off., REMARKS., Miles reading. start., Miles… | ||
| Scan174 | Mileage report for two Scintilla magnetos removed from vehicles 46-PK and 93-NK. | ||
| View original record | EFC. X8795 23.2.25. X.4187. SCINTILLA MAGNETOS. The mileage of the two magnetos, which have been removed from 46-PK and 93-NK, are to date :- AM6A. No.34937. 9904 miles on 46-PK. AM6A No.349C3. 6547 "… | ||
| Scan175 | Condition of two Scintilla magnetos sent for testing and a delay in evaluating a new dynamo. | ||
| View original record | To Wd. from EFC. x8795 EFC/ATB.3.25. SCINTILLA MAGNETOS AND DYNAMOS. X4484 X4290 In accordance with your telephone conversation of yesterday we are sending you along two Scintilla magnetos:- 1 type… | ||
| Scan176 | Electrical experimental record sheet for a Scintilla Magneto, type AM6A. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS. X4187 Scintilla Magneto NO 34937. Type AM6A (Negative Rotation) Date on. | Location. | Date off. | Remarks. | Miles Reading Start. | Miles Reading Finish. |… | ||
| Scan177 | Examination and test report for a Scintilla type AM6A Magneto, No 34937. | ||
| View original record | RR 230 (150 BKS) (SHD7.29-6-20.) MP 224358 X8795 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.F.B. 19 Order No. WA 116 Customer's No. Scintilla type AM6A Magneto NO 34937 An examination and test of this… | ||
| Scan178 | Bearing condition and magneto sparking performance at various speeds. | ||
| View original record | RR 23D (150 BKS.) (BH57-29-6-20.) MP 22435R ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. 2 Customer's No. considered excessive. The two bearings also exhibited no sign of side or end play. It was found… | ||
| Scan179 | Letter concerning the substitution of a Scintilla magneto, replacing magneto 28531 with 34937, following a request from Scintilla Ltd. | ||
| View original record | EFC. from Wd. X'87957 Wd4/NJ12.3.25. X.4290 - Scintilla Dynamo and Regulator. The remarks conveyed in yours EFC1/T5.3.25 and EFC2/T6.3.25 were communicated to Scintilla Ltd. and yesterday we received… | ||
| Scan180 | The substitution of Scintilla magnetos pending the completion of performance tests. | ||
| View original record | X8795 To Wd. from EFC. EFC1/T13.3.25. X.4187 SCINTILLA MAGNETOS. Answering your Wd4/NJ12.3.25. we have no real objection for substituting magneto No.28531 for No.34937. The reason we sent No.28531 to… | ||
| Scan181 | Test report on a Scintilla magneto type AG6A, no. 34903, after running 6,547 miles. | ||
| View original record | RR 236 [150 BKS.] [BH37. 28-6-20.] MP 224356 X 8798. ROLLS-ROYCE LTD. INSTRUCTIONS. 19 - 3 - 1925 To E.Y.B. Order No. W.A. 117 Customer's No. X4187 Scintilla magneto type AG6A NO 34903 An examination… | ||
| Scan182 | Instruction sheet confirming a magneto's high-speed sparking test was satisfactory for further use. | ||
| View original record | RR 298 (100 BKS.) (SH57. 29-6-20.) MP 224355 ROLLS-ROYCE LTD. INSTRUCTIONS. To_________________________19 Order No. (2) Customer's No.____________ The high speed sparking was also good, the magneto… | ||
| Scan183 | Electrical experimental record sheet for Scintilla Magneto type AG-6A, No. 34903. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEET X4187. Scintilla Magneto type AG-6A. NO.34903. Date on. Location. Date off. REMARKS. Miles Reading Start. Miles Reading Finish. Miles Covered. Total Miles. 7-8-24… | ||
| Scan184 | Electrical experimental record sheet for a Scintilla Magneto Type A.M.6A. | ||
| View original record | X4187 ELECTRICAL EXPERIMENTAL RECORD SHEET; Scintilla Magneto Type A.M.6A. NO 28533. Date on. Location. Date off. REMARKS. Miles reading start. Miles reading finish. Miles covered. Total Miles.… | ||
| Scan185 | Return of a Scintilla magneto. | ||
| View original record | To Wd. from EFC. X8795 EFC2/T20.3.25. X.4187 - SCINTILLA MAGNETOS. Further to our EFC1/T13.3.24, we now hand to you Scintilla magneto No.34937 for return to Messrs. Scintilla. EFC. | ||
| Scan186 | Correspondence concerning the return of one Scintilla magneto and instructions for another to be sent. | ||
| View original record | X 8795. EFC.from Wd. Wd7/NJ25.3.25. X.4187 - Scintilla Magnetos. I duly received yours EFC2/T20.3.25 and have this morning received magneto AM-6-A No.34937, which I am returning to Scintilla Ltd.… | ||
| Scan187 | Change of dispatch instructions for magnetos being sent to Messrs. Scintilla Ltd, retaining one and substituting another. | ||
| View original record | x 8795 D/BP. c.c. to MY/Chat. c.c. to MY/NBH. c.c. to EFC. Wd/Dn3/BH26.3.25. With further reference to our Despatch Instructions of the 10th inst. ref. Wd/Dn3, instructing the two undermentioned… | ||
| Scan188 | Visit from Scintilla Ltd. regarding magneto specifications and the return of a dynamo and regulator. | ||
| View original record | EFC. from Wd. V8795 Wd2/NJ9.12.25. Scintilla Magnetos and Dynamos. Referring to the visit which Mr.J.H.Berger of Scintilla Ltd. paid to these Works on Wednesday last, 2nd inst. on which occasion you… | ||
| Scan189 | Graph proposing combined automatic and hand timing for a 40/50 HP 6-cylinder motor. | ||
| View original record | degr. 60 50 40 30 20 10 0 0 500 1000 1500 2000 2500 3000 rPm 20° Hand Timing 35° Automatic Timing SCINTILLA SOCIETE ANONYME C 71222 SOLEURE Proposition for an AG6-A with combined Automatic and Hand… | ||
| Scan190 | Unsolicited improved type GN6 magneto received from Scintilla Ltd. | ||
| View original record | EFC. from Wd. X 8795 2-0 11/3/26 Wd2/NJ11.3.26. X 8795 Scintilla Ltd., 331, Euston Road, N.W.1. We are in receipt of a letter from these people informing us that on the 9th inst. they despatched to us… | ||
| Scan191 | Preliminary report on a new Scintilla magneto, type GN6 NO57927. | ||
| View original record | RR 238 (100 BKS) [SH57.29-8-20.] MP 224358 X 8795 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.H.E. Date: 16-4-1926 Order No.: WB81 Customer's No.: X 4187 Preliminary report on new Scintilla magneto type GN6… | ||
| Scan192 | Instructions detailing improvements and modifications to a magneto, comparing it to previous Scintilla and R. Bosch models. | ||
| View original record | RR 238 [150 BKS] [SHST.29-6-20.] MP 22435B ROLLS-ROYCE LTD. INSTRUCTIONS. ____________________19 To____________________ Order No. 2 Customer's No.__________ is particularly good, and char-… | ||
| Scan193 | Instruction sheet detailing modifications for a distributor gear wheel and L.T. terminal. | ||
| View original record | HH 238(150 BKS.)(BHS)29-8-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. 3 Customer's No. 19 4. Cast iron distributor gear wheel instead of the "stabalite" wheel previously fitted. 5. L.T.… | ||
| Scan194 | Electrical experimental record sheet for a Scintilla GN6 Magneto No 57927. | ||
| View original record | X8795 ELECTRICAL EXPERIMENTAL RECORD SHEETS. X. No:- 8795 Scintilla GN6 Magneto No 57927 Date on. Location. Date off. REMARKS. Miles reading start. Miles reading finish. Miles covered. Total miles… | ||
| Scan195 | Form for recording details of magneto design and performance. | ||
| View original record | X. 8795. X. 430. FORM OF RECORDING DETAILS OF MAGNETO DESIGN AND PERFORMANCE. Date:- 14-5-26 Magneto on test:- Maker :- Scintilla X. No. :- 8795. Type :- GN6 No :- 57927 (1) Weight in pounds:- 13.8… | ||
| Scan196 | Specification sheet detailing primary point gap, contact breaker timing, and automatic advance characteristics. | ||
| View original record | -2- (4) Primary point gap:- .012" Contact Breaker timing :- Table 1: | Make. | Break. | |---|---| | A. 10.5° | 93.5° | | R. 74° | 155.5° | Table 2: | | Retard. | Advance. | |---|---|---| | Make | 74°… | ||
| Scan197 | Test report detailing results of endurance, short circuit, and open circuit tests, including a volt-speed curve. | ||
| View original record | (3) (6) Endurance test :- OK (7) Short circuit test :- OK (8) Open circuit test :- Would not spark regularly at safety gap - suggests gap too large. (9) Open circuit primary volt-speed curve. Speed.… | ||
| Scan198 | Test results showing a closed circuit primary ampere-speed curve and sparking characteristics. | ||
| View original record | -4- (10) Closed circuit primary ampere-speed curve. Speed. Amperes. Speed. Amperes. 100 1.12 1200 2.08 200 1.51 1600 2.13 300 1.70 2000 2.17 400 1.85 2400 2.19 600 1.97 2800 2.21 800 2.01 3200 2.22… | ||
| Scan199 | Test results for an ignition system, detailing secondary milliamps, primary point gap, and contact breaker timing angles. | ||
| View original record | -5- (14) Secondary milliamps : Maximum :- 5.5 Minimum :- 3.0 (15) Primary point gap after previous tests :- .010" Primary point gap .008" Contact breaker timing. Table 1: Make. | Break. A. | 8° | 93°… | ||
| Scan200 | Remarks on the silence of operation and the force required to move the advance lever. | ||
| View original record | -6- (16) Remarks re silence of operation:- Fairly normal as regards quietness. Gears ring badly at high speeds. contact breaker also rather noisy (17) Force necessary to move advance lever = 3.5 lbs… | ||
| Scan201 | Returning a Scintilla magneto as there is no further interest in the machines. | ||
| View original record | To Wd. from EFC. X8795 EFCl/T19.5.26. X.8795 - SCINTILLA MAGNETO. We hand you herewith Scintilla magneto No.57927 type GN6, which we are desirous of returning to the makers, as we have decided that we… | ||
| Scan202 | Graph of Open-Circuit Volt and Short-Circuit Ampere speed curves for a Scintilla GN6 Magneto No 57927. | ||
| View original record | X. 8795. O.C. VOLTS. S.C. AMPERES. VOLTS AMPERES OPEN-CIRCUIT VOLT AND SHORT-CIRCUIT AMPERE SPEED CURVES OF PRIMARY WINDING OF SCINTILLA GN6 MAGNETO No 57927. SPEED (r.p.m.) H.E.W. | ||
| Scan203 | Obtaining comparative prices for competitor magnetos, such as Bosch and Scintilla, for a 12-cylinder engine. | ||
| View original record | X 8795 To Roy. from EFC. EFC6/T23.8.27. CHASSIS MAGNETOS. X8790 In R's note RL/M19.8.27 he has a paragraph :- "We think however it will be advisable from a business point of view to compare the prices… | ||
| Scan204 | Letter from Scintilla regarding the supply of GN12-D magnetos for 12-cylinder aero-engines. | ||
| View original record | SCINTILLA LIMITED MAGNETOS DYNAMOS - STARTERS SWITCHBOARDS, HEADLIGHTS BATTERIES ETC. All communications should be addressed to the Company Directors: J. SCHNYDER (Swiss) F. BILLON (Swiss) G. E.… | ||
| Scan205 | Letter from Scintilla Limited concerning the supply of magnetos for a 14/50 HP Chassis. | ||
| View original record | - 2 - Messrs. Rolls-Royce, Ltd. 1. 9. 27. Magnetos for your 14/50 HP. Chassis. The suitable magneto for the above is our type GN6 or GN6-S, the latter machine being provided with automatic advance.… | ||
| Scan206 | Price comparison of various magnetos for 40/50 HP chassis and 12-cylinder aero engines. | ||
| View original record | ROY1/MG9.9.27. (modified) COMPARISON OF MAGNETO PRICES. 40/50 HP. Chassis Magnetos. Watford present standard E.O.6. (i.e. sleeve type).. £11. 0. 0d Proposed Watford...... E.W.6 (i.e. sleeveless type).… | ||
| Scan207 | Two Scintilla 6-cylinder magnetos in stock, which are to be sent to Scintilla Ltd. for inspection and payment. | ||
| View original record | X.4187 D/BP from Wd. c to EFC c to GAH nWd6/GM.23. 7. 29. "Scintilla Magnetos" We have in stock in our Electrical Laboratory:- 2 Scintilla 6 - cylinder magnetos. Left hand. marked AG6 - A No.34903 and… | ||
| Scan208 | Offer from Scintilla Ltd. for the disposal of obsolete magnetos. | ||
| View original record | X 4187 Extract from Wd12/GM15.8.29. 4187 X.4018. SCINTILLA MAGNETOS FOR DISPOSAL. X.4113. As regards the 2 Scintilla 6 - cylinder magnetos, Scintilla Ltd., have offered us 30/- each for same. In… | ||
| Scan209 | Agreeing to an offer for the disposal of Scintilla magnetos. | ||
| View original record | X.4187 Wd. from EFC. EFC2/ADL6.8.29. 4187 X.4018. SCINTILLA MAGNETOS FOR DISPOSAL. In reply to your Wd12/GM15.8.29, we agree that the Scintilla offer should be accepted. EFC. | ||
| Scan210 | Cover page for a document about the Watford Magneto. | ||
| View original record | 8796 RR 68 (250T) (DB 925 8-5-25) J.H.D. EAC.II WATFORD MAGNETO. | ||
| Scan211 | Examination of a noisy Watford Magneto, No. 58668, from an experimental car. | ||
| View original record | X.8796 To EY. from EFC. EFC4/T30.6.24. X.4181d - WATFORD MAGNETO. No.58668. This magneto was observed to be noisy on one of our experimental cars. It was accordingly taken to pieces and examined, and… | ||
| Scan212 | Examination report detailing the faults found on a Watford EO6 Magneto, serial number 58663. | ||
| View original record | EFC. WA.53. 26th June, 1924. X.4181c. WATFORD EO6 MAGNETO NO.58663. An examination of the component parts of the above magneto has been made, and the following points observed:- (a) Oil and carbon… | ||
| Scan213 | Instruction sheet detailing observations on a returned Watford E.O.6 magneto. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. RR 238 (150 BKS.) (BH57.29-6-20.) MB 224355 X. 8796. To: E.Y.C. Date: 30th June 1924 Order No.: W.A 54 Customer's No.: X.4181d Watford E.O.6 magneto No. 68105 returned… | ||
| Scan214 | Instruction sheet detailing magneto test results and noting a failure report on misfires. | ||
| View original record | RR 238 (150 BKS.) (RH57. 29-5-20.) MP 224356 ROLLS-ROYCE LTD. INSTRUCTIONS. 19. To _________ Order No. W.A.54(2A) Customer's No. _________ a. Fully advanced 220 r.p.m. b. Central position 170 r.p.m.… | ||
| Scan215 | Letter altering the automatic advance speed specification for a 6-cylinder magneto for the 40/50 car. | ||
| View original record | X8794 Letter also sent to Messrs. Lucas Elec. Co., EFC8/T. Wall Street, B'ham. The M.L. Magneto Syndicate, Victoria Works, Coventry. EFC7/T. EFC6/T. 27th August, 1924. Messrs. North & Sons Ltd.,… | ||
| Scan216 | Instructions detailing the testing of a Watford E06 Magneto returned from repair, with notes on low-speed sparking and a sleeve damping device. | ||
| View original record | RR 238 (150 BKS) (BH57.29-6-20.) MP 224355 X. 9786 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.B. Date 3 - 9 - 1924 Order No. WA78 Customer's No. X4181 Watford E06 Magneto No 58663 returned to Messrs… | ||
| Scan217 | Instruction note regarding a returned 60-degree range magneto with sleeve noise found to be caused by faulty securing. | ||
| View original record | RR 238 (100 BKS.) (BH57.28-6-20.) MP 224356 ROLLS-ROYCE LTD. INSTRUCTIONS. 19 To Order No. W.A.78(2) Customer's No. Armature reaction. N.B. This magneto is a 60° range magneto returned to us by HS/GWH… | ||
| Scan218 | Modification of three Watford magnetos for further testing on an EAC.2 chassis. | ||
| View original record | X8796 To Wd. from EFC. c. CHAT. c. D/BP. EFC1/T30.12.24. X.4181d. WATFORD MAGNETOS. We are sending into the Stores three special Watford magnetos, Nos.68109, 70037 and 73973. These magnetos have 60°… | ||
| Scan219 | Quoting a letter from North & Sons Ltd. regarding the modification of Watford magnetos. | ||
| View original record | EFC. from Wd. [crossed out text: c.c. to Chaty] [crossed out text: c.c. to D/EP] X8796 Wd5/NJ7.1.25. X.4181 d. Watford Magnetos. Referring to yours EFC1/T30.12.24, we are in receipt of a letter from… | ||
| Scan220 | Exchanging H.T. collector brushes on Watford magnetos for experimental testing. | ||
| View original record | To Wd. from EFC. X8796 EFC1/T12.1.25. X.4181b - WATFORD MAGNETOS WITH NEGATIVE ROTATION AND 60° RANGE. Referring to your Wd5/NJ7.1.25, we have now received back the three magnetos Nos. 68109, 70037… | ||
| Scan221 | Instructions regarding modifications for the E06(d) magneto following production tests. | ||
| View original record | RR 238(150 BKS) [SH57.29-6-20.] MP 224358 X.87962 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.Y.B. Order No. WA 105 21-1-1925 X4181d Customer's No. X8781m Production test of Watford E06(d) magneto for E.A.C.… | ||
| Scan222 | Instructions to address engine noise from flopping sleeves by modifying the advance lever and cam ring force. | ||
| View original record | RR 238 (150 BKS) (BH57. 29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. WA105 (2) Customer's No. Investigation having shown that the noise caused by the flopping of the sleeves is… | ||
| Scan223 | Instructions for engine testing procedures, focusing on magneto performance and addressing distributor gear noise. | ||
| View original record | RR 23a (150 BKS.) [BMS7 28-6-20.] MP 224356 ROLLS-ROYCE LTD. INSTRUCTIONS. To ________ 19 Order No. WA105 (3) Customer's No. ________ No 6 It is suggested that the second 15 mins run at 3000 rpm.… | ||
| Scan224 | Instructions regarding minimum low-speed sparking speeds for magnetos. | ||
| View original record | RR 238 (150 BKS.) (SH57.29-6-20.) MP 224388 ROLLS-ROYCE LTD. INSTRUCTIONS. To 19 Order No. WA105 (4) Customer's No. No7 It is considered that the minimum low speed sparking speeds should be ;- (a)… | ||
| Scan225 | Potential wear on the oil relay advance controls and suggesting making the joints larger. | ||
| View original record | To R. from Hs. c. to CJ. BJ. c. to E. BA. c. to BY. Wor. x8796 S E C R E T. Hsl/LG23.1.25. EAC: 'V' SERIES. x8685 OIL RELAY ADVANCE. When the car is on the road, the oil relay advance is working the… | ||
| Scan226 | The specification for the Watford Type E06 Magneto for an EAC chassis. | ||
| View original record | To EY. from EFC. c. SFT c. SFT/Mr. Brock. ELLIS X8746 EFC1/T27.1.25. X. 4181d. WATFORD TYPE E06 MAGNETO FOR EAC. (60° Range - left hand rotation) X8781 Herewith please receive copy of Specification of… | ||
| Scan227 | Production inspection and test specification for a Watford Type ED6 (d) Magneto. | ||
| View original record | CS.I.s 11.6.25. VERSION 1A. X.6781m. WATFORD TYPE ED6 (d) MAGNETO FOR H.H. EAG. CHASSIS. A.41d. SPECIFICATION OF PRODUCTION INSPECTION & TEST. (1) The contact breaker cover, distributor ring and rear… | ||
| Scan228 | Testing procedures for magneto and ignition system components. | ||
| View original record | -2- Contd. (3) Continuity of primary and secondary circuits shall be tested by applying an A.C. voltage of 205 between the high tension terminal and the frame, with the contact points held apart, when… | ||
| Scan229 | Specifications for magneto sparking speeds at different advance positions. | ||
| View original record | -3- Contd. gear wheel with the pinion is correct; incorrect meshing being indicated by an uneven rattle emanating from the distributor end of the magneto. (7) The slowest speeds at which regular… | ||
| Scan230 | List of Watford magnetos type EC6d available for conversion or requiring updates. | ||
| View original record | X.4181d. 8796 EFC. 4.2.25. WATFORD MAGNETOS. The following magnetos type EC6d are available for conversion to 600 range, negative rotation, bakelite pinion, duralumin lever, etc. magnetos (i.e.… | ||
| Scan231 | Numerical data for Watford E06 (d) magnetos for EAC chassis. | ||
| View original record | To By/Shn. from EFC. X8796 EFC2/T6.2.25. X4181d WATFORD E06 (d) MAGNETOS FOR EAC. X8761- Attached is a collection of numerical items in connection with the Watford E06 (d) magneto for EAC. chassis… | ||
| Scan232 | Extract from the production specification for inspection and testing of Watford E06 (d) magnetos for EAC. | ||
| View original record | X8796 EFC/T6.2.25. X.8781m. WATFORD E06 (d) MAGNETOS FOR EAC. Extract from Production Specification of Inspection & Test. Maximum primary gaps .011 ±1 Safety spark gap 8.2 to 8.5 mm. Available range -… | ||
| Scan233 | The examination of a noisy Watford Magneto, No. 73972, from an experimental test engine. | ||
| View original record | BY. from EFC. c. Wd. X8796 EFC6/T6.2.25. RE WATFORD MAGNETO No. 73972. This magneto was observed to be noisy on one of our experimental test engines. It has accordingly been examined in our laboratory… | ||
| Scan234 | Analysis of noise reported from a Watford E06 (d) Magneto, No.73972, off test. | ||
| View original record | EFC. WA.108. 6th Feb. 1925. X.4181d. WATFORD E06 (d) MAGNETO No.73972 REPORTED NOISY OFF TEST. This magneto has now been carefully run to analyse the noise emanating from the various rotating etc.… | ||
| Scan235 | Eliminating noise from sleeves and securing silent gears. | ||
| View original record | -2- greatly eliminated, and the persistent flopping noise of the sleeves would be greatly damped, that is assuming of course that the sleeves themselves are riveted securely to the brass locating… | ||
| Scan236 | Communication regarding a new method for marking teeth on aluminium gears for Watford EO.6 Magnetos. | ||
| View original record | By. from Wd. c to CO/Dn. rye. X8796 Wd2/NJ9.2.25. WATFORD EO.6 MAGNETOS. In reply to EY/C/6/H31.1.25, Norths have written us as follows :- "Regarding the marking of the teeth on the aluminium gears,… | ||
| Scan237 | Instructions to despatch Magneto No. 73972 to Messrs. North & Sons Ltd for examination after testing. | ||
| View original record | X.8796 D/Br. c. to My/Chat. c. to My/WH. c. to EFC. Wd/Dn2/EH10.2.25. Please despatch by passenger train to-day carriage paid, to Messrs. North & Sons Ltd, Whippendell Road, Watford, E.O.6. Magneto… | ||
| Scan238 | Timing markings on the aluminium wheel for Watford E.O.6 magnetos. | ||
| View original record | X. 87961. EFC. BY/C14/H. 11. 2. 25. WATFORD E.O.6. MAGNETOS. With reference to EFC1/T. 20.1.25. in connection with the timing marking on the aluminium wheel in the above magnetos, this matter was… | ||
| Scan239 | Agreeing on a form of marking for Watford E06 Magnetos. | ||
| View original record | X8796 To BY/C. from EFC. EFC1/T12.2.25. X$4181d. WATFORD E06 MAGNETOS. Reference your BY/C14/H11.2.25. Agree. This form of marking seems likely to be as good as any we have had so far. EFC. | ||
| Scan240 | List of outstanding tests required for the experimental Watford EC6d magneto. | ||
| View original record | EFC. X8796 14.2.25. EXPERIMENTAL TEST OF WATFORD EC6d MAGNETO The following items of our comparative test specification have not yet been carried out on the latest EAC. Watford magneto. Item. Test. 4… | ||
| Scan241 | Instructions for timing a magneto using a marked tooth and a list of its technical specifications. | ||
| View original record | QL -29- Contd. 23-2-21 on either side of this tooth and the middle portion at the top of the tooth itself being blacked. Timing the magneto by means of this marked tooth will readily give the degree… | ||
| Scan242 | Proposed change to the damping load specification for a magneto operating lever. | ||
| View original record | x 8796 Order ~~Office.~~ c. ~~Mr. Shelton.~~ c. Hs. BY7/H. 26. 2. 25. MAGNETOS. At present we specify the damping of the magneto sleeve at the end of the operating lever to be 3 to 5 lbs. The… | ||
| Scan243 | Communication detailing the follow-up with North & Sons Ld regarding a complaint about a Watford Magneto. | ||
| View original record | EFC. Copy to EV. X. 87961. Wd/P3.3.25. re WATFORD MAGNETO 73972 Upon receipt of EFC6/T6.2.25. I wrote North & Sons Ld enclosing copy of EFC's Assistant's report WA108. Shortly after writing our letter… | ||
| Scan244 | Proposed modifications to the EO.6 Watford Magneto and the resulting noise issues. | ||
| View original record | Y8796 By from Wd. c.to Mr. Shelton. c.to Hs. c.to EFC. Wd3/WJ4.3.25. EO.6 Watford Magneto. In reply to yours By7/H26.2.25, North & Sons Ltd. have written us regarding the proposed reduction in the… | ||
| Scan245 | Letter to Messrs North & Sons regarding operational force and noise issues with a Watford Magneto. | ||
| View original record | c. Mr Hives. c. Mr. c. Eng. c. Hs. c. Mr.Shelton. X87961 BY9/H. 9.3.25. March 9th, 1925. Monday. Messrs North & Sons, Ltd. Whippendell Road, Watford. Dear Sirs, E.O.S. WATFORD MAGNETO. X4181d… | ||
| Scan246 | Improving an ignition timing device by reducing sleeve effort, noise, and specifying manufacturing tolerances. | ||
| View original record | - 2 - BY9/H. 9. 3. 25. The above matter is of the utmost importance to us, the facts of the case being that we have developed a device for advancing and retarding both the battery and magneto ignition… | ||
| Scan247 | Letter discussing the investigation and resolution of noise from a Watford Magneto No. 73972. | ||
| View original record | EFC. from Wd. c. to By. [text crossed out] X8796 Wd3/NJ9.3.25. EO.6 Watford Magneto No.73972. I confirm mine Wd/P3.3.25. We are now in receipt of a letter from North & Sons Ltd. dated 6th inst. as… | ||
| Scan248 | Ease of operation of the E.O.6 Magneto and a proposal from Messrs North's for a modified version. | ||
| View original record | X8790 EFC. C. Hs. C. Wd. BY1/H. 12. 3. 25. With reference to the question of the ease of operation of the E.O.6. MAGNETO, and Messrs North's recent letter to Wd on this subject, in reply to my BY9/H.… | ||
| Scan249 | Correspondence from North & Sons, Ltd. regarding the force required for the advance lever on a Model E.O.6. Magneto. | ||
| View original record | Copy Messrs North & Sons, Ltd. Whippendell Road, Watford. 11th March, 1925. Your Ref. BY9/H. Our Ref. CHK/HC.11. Messrs Rolls Royce Ltd, Derby. Dear Sirs, We thank you for your letter of the 9th inst,… | ||
| Scan250 | Resistance and timing specifications for a Watford EC6d Magneto, serial number 73972. | ||
| View original record | X8796 18.3.25. EFC. WATFORD EC6d MAGNETO No. 73972. Primary resistance (19°C) = .96 ohms. Secondary resistance (19°C) = 2,400 ohms. Timing. Condition. Advance. Retard. Make. -108° -46° Break. 40° 102°… | ||
| Scan251 | List of magnetos and their specifications for the 40/50 chassis. | ||
| View original record | X8796 18.3.25. MAGNETOS ON 40/50 CHASSIS. 49-GB. Magneto No.73958. Bakelite gear wheel and alum. distributor. 5-EX. " No.73956 " 98-NK " No.70037. 60° range negative rotation. 44-PK. Magneto No. 60°… | ||
| Scan252 | Extract detailing the production test results for specific Watford magnetos. | ||
| View original record | X8796 Extract from WA.118 of 19.3.25. WATFORD E06d MAGNETO No.83970. & WATFORD E06c MAGNETOS NOS. 73953 and 73955. No.73970. Production tests to our latest specification have been completed on the… | ||
| Scan253 | Requesting the return of a Watford EO6 distributor rotor to Messrs. North's for repair. | ||
| View original record | X8796. To Wd. from EFC. EFC1/T20.3.25. X.4181d. WATFORD EO6 MAGNETOS. Herewith one EO6 distributor rotor. Would you kindly have this returned to Messrs. North's for repair at our expense. EFC. | ||
| Scan254 | The testing of a Watford EO6 Magneto, No. 73972. | ||
| View original record | V8696 To Wd. from EFC. c. By. EFC3/T23.3.25. X.4181d. WATFORD EO6 MAGNETO No. 73972. We have now tested this magneto, since its return from Messrs. North, and attached please find copy of my… | ||
| Scan255 | The testing of a Watford Magneto No. 73972 returned from repair at Messrs. North's due to excessive noise. | ||
| View original record | EFC. WA.119. 23.3.25. WATFORD MAGNETO No. 73972. RETURNED FROM MESSRS. NORTH'S This magneto was sent to North's as being excessively noisy, especially the sleeves (see report WA.108). They agreed that… | ||
| Scan256 | Form recording the design and performance details of a Watford magneto. | ||
| View original record | * 87962 X. 430. FORM OF RECORDING DETAILS OF MAGNETO DESIGN AND PERFORMANCE. Date:- 26-3-25 Magneto on test:- Watford Maker :- North & sons Ltd X. No. :- 4181d. Type :- E0bd No :- 73972 (1) Weight in… | ||
| Scan257 | Specifications for primary point gap, contact breaker timing, and automatic advance characteristics. | ||
| View original record | -2- (4) Primary point gap:- .010" and .012" Contact Breaker timing :- Make. Break. A. -67.5° 83° R. -5.5° 145° Retard. Advance. Make -6° -68° Break 145° 82° Make 175° 113° Break 326° 264 Range:- 62°… | ||
| Scan258 | Test report detailing endurance, short circuit, and open circuit tests, including a volt-speed curve. | ||
| View original record | (3) (6) Endurance test :- H.T sparking OK. Slight carbon deposit inside the distributor. Gears show signs of hard meshing in places. Contact breaker and other parts OK. (7) Short circuit test :- OK… | ||
| Scan259 | Test results showing ampere-speed curve, utility tests, speed range and sparking characteristics for a component. | ||
| View original record | -4- (10) Closed circuit primary ampere-speed curve. Speed. Amperes. Speed. Amperes. 100 .75 1200 3.00 200 1.30 1600 3.20 300 1.72 2000 3.22 400 2.00 2400 3.32 600 2.35 2800 3.35 800 2.66 3200 3.38… | ||
| Scan260 | Test results page showing secondary milliamps, primary point gap, and contact breaker timing data. | ||
| View original record | -5- (14) Secondary milliamps :- Maximum :- 19.3 Minimum :- 9.6 (15) Primary point gap after previous tests :- .012" Primary point gap .014" Contact breaker timing. | | Make. | Break. |… | ||
| Scan261 | Operational noise, noting issues with unevenly meshing gears and sleeve noise. | ||
| View original record | -6- (16) Remarks re silence of operation:- Gears meshing unevenly, and slight noise caused by the sleeves, otherwise fairly quiet. EFC. | ||
| Scan262 | Graph of open circuit volt-speed and short circuit ampere-speed curves for the primary winding of a Watford E.D.6.L Magneto. | ||
| View original record | X41814 O.C. VOLTS S.C. AMPERES AMPERES VOLTS OPEN CIRCUIT VOLT-SPEED AND SHORT CIRCUIT AMPERE-SPEED CURVES OF PRIMARY WINDING OF WATFORD E.D.6.L MAGNETO No 7347X SPEED R.P.M. | ||
| Scan263 | Blank document page with a publication department date stamp. | ||
| View original record | ROLLS-ROYCE LIMITED. PUBLICATION S.A. 4 - APR. 1925 DERBY | ||
| Scan264 | Modifications and noise levels of a Watford EO.6 Magneto. | ||
| View original record | EFC.from Wd. c.to By. X. 8796 Wd15/NJ30.3.25. X.4181 d. Watford EO.6 Magneto No.73972. Upon receipt of yours EFC3/T23.3.25, Isent North & Sons a copy of your assistant's report WA.119 of 23.3.25 and… | ||
| Scan265 | Instructions for an experimental comparative test of a Watford E06d magneto. | ||
| View original record | X. 87916 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.b. Order No WB3 Customer's No. X4181d Experimental comparative test of latest Watford E06d magneto NO 73972 This test to our revised schedule has now… | ||
| Scan266 | The handing in of two Watford EO6 magnetos to the Experimental Stores. | ||
| View original record | X. 8796 To RHC. from EFC. c. Expl. Stores. EFC1/T24.25. X. 4181d. WATFORD MAGNETOS. We are handing in to the Stores two Watford EO6 magnetos which are O.K. for EAC. chassis. These are Nos 73971/3. We… | ||
| Scan267 | Return of a Watford E06 Magneto for repair and modification. | ||
| View original record | X0796 To Wd. from EFC. EFC3/T17.4.25. RE WATFORD E06 MAGNETOS. X.4181. We hand you herewith Watford E06 magneto No. 71063. Will you kindly have this returned to the makers to be brought up-to-date. It… | ||
| Scan268 | Letter regarding an E.O.6 Magneto with modified controls being sent for testing and a report. | ||
| View original record | X. 8796 HS. c. EFC. c. Wd. c. Mr.Shelton. BY/HM/W.27.4.25. RE E.O.6 MAGNETO WITH MODIFIED CONTROLS. ------------------------ We are sending you herewith an E.O.6 Magneto number 81018, which has been… | ||
| Scan269 | Correspondence quoting a letter from North & Sons Ltd. about a noisy magneto being sent for inspection. | ||
| View original record | X 8796 By from Wd. c. to EFC. c. to HB. Wd1/NJ/27.4.25. Referring to yours By1/HL2.3.25, we are now in receipt of a letter from North & Sons Ltd. dated 25th inst. as follows:- "In reply to your letter… | ||
| Scan270 | Investigation into the operational noise of a Watford E06d magneto, described as 'flopping of the sleeves'. | ||
| View original record | RR 238 (150 BKS.) (SH57. 29-4-20.) MP 23435s X. 8796 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.C. Date 28-4-1925 Order No. WB 9 Customer's No. X4181d Watford E06d magneto N0 81018 (Special Ground… | ||
| Scan271 | Instructions regarding the finer location of a brass sleeve securing collar and clearances within a magneto assembly. | ||
| View original record | RR 238 (180 BKS.) (BH57.29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To_____________________19__ Order No. 2 Customer's No. __________ understand what was intended to be conveyed to them in… | ||
| Scan272 | Instruction sheet detailing methods to reduce oscillation and noise by adjusting collar clearance and introducing a felt ring. | ||
| View original record | RR 238 (100 BKS.) (BH57. 29-6-20.) MP 22435A ROLLS-ROYCE LTD. INSTRUCTIONS. To 19 Order No. 3. Customer's No. tendency to whip to and fro whereas if the collar was located with only say .002"… | ||
| Scan273 | Agreeing to the quoted cost for the conversion of a Watford EC6 Magneto. | ||
| View original record | X8796 To Wd. from EFC. EFC1/T8.5.25. X.4181 WATFORD EC6 MAGNETO. NO. 71063. Answering your Wd2/NJ7.5.25, we are agreeable to the magneto being converted at this quoted cost. EFC. | ||
| Scan274 | The return of a Watford EC6 Magneto to Messrs. North. | ||
| View original record | X. 8796 To Wd. from EFC. EFC2/T5.5.25. X. 4181. WATFORD EC6 MAGNETO No. 81018 ( - specially ground pole shoes and sleeves) Herewith we hand you back this magneto so that it may be returned to Messrs.… | ||
| Scan275 | Quote from North & Sons Ltd. for modifying a Watford EO.6 Magneto to increase its range of advance. | ||
| View original record | EFC. from Wd. X 8790. Wd2/NJJ.7.5.25. Watford EO.6 Magneto - X.4181. The EO.6 type magneto No.71063 referred to in yours EPC3/T17.4.25 was returned to North & Sons Ltd. on 17th ult. and we are this… | ||
| Scan276 | Modifications to the Watford Magneto following correspondence with North & Sons. | ||
| View original record | By from Wd. c.to EFC. c.to HS. X.8796. Wd9/NJ8.5.25. EO.6 Watford Magneto. Following Mr.North's visit on the 5th inst., I wrote his firm detailing precisely what we consider they ought to do to… | ||
| Scan277 | Failed Watford magneto contact breaker lever and its potential repair. | ||
| View original record | X8796 To Wd. from EFC. EFC3/T9.5.25. X.14181. WATFORD MAGNETO. Herewith we hand to you a Watford magneto contact breaker, the lever of which has failed at the rubbing block end, apparently in ordinary… | ||
| Scan278 | Bench test results and potential modifications for a Watford Magneto, No. 81062, focusing on noise and clearance issues. | ||
| View original record | To Wd. from EFC. c. By. c. Mx. X8796 EFC2/T13..5.25. X.4181. RE WATFORD MAGNETO. NO. 81062 WITH IMPROVED LOCATION OF SLEEVES. Please find attached copy of my assistant's report on the bench tests of… | ||
| Scan279 | The testing of an experimental magneto, which showed improvement but was not entirely satisfactory. | ||
| View original record | -2- Contd. EFC2/T13.5.25. to be provided with such an experimental machine. A further report on this machine will be forthcoming when it has been duly tested on a chassis. It will be remembered that… | ||
| Scan280 | Testing the Watford E06 Magneto No. 81062, focusing on noise reduction from improved sleeve location. | ||
| View original record | EFC. WB13. 13.5.25. WATFORD E06 MAGNETO No.81062 WITH IMPROVED LOCATION OF SLEEVES. This magneto is generally much quieter than a number of machines that we have tested lately. The sleeve securing… | ||
| Scan281 | Faulty Watford EC6 Magneto being returned to its makers for repair and updating. | ||
| View original record | To Wd. from EFC. X 8796 EFC3/T15.5.25. _X.4181 WATFORD EC6 MAGNETO No.77606._ We hand you herewith the above magneto which has recently been removed from one of our experimental chassis, more… | ||
| Scan282 | Improvements to the Watford Magneto and the associated supplier price increase. | ||
| View original record | X.8796 Wd. c. EFC. c. Roy. BY8/H. 15.5.25. E.O.6. WATFORD MAGNETO. -------------------- Referring to Wd4/NJ. 15.5.25. with copy of Messrs Firth & Sons' letter of the 14th inst, my position in this… | ||
| Scan283 | The improved Watford Magneto, supply arrangements, and pricing with North & Sons Ltd. | ||
| View original record | By. from Wd. c.to EFC. c.to Roy. c.to CG/Dn. X 8796 Wd4/NJ15.5.25. EO.6 Watford Magneto, with improved location of sleeve. On the 11th inst. we wrote North & Sons Ltd. as follows:- "The magneto… | ||
| Scan284 | Typed note urging an immediate decision regarding the supply of magnetos. | ||
| View original record | - 2 - Wd4/NJ15.5.25. It is essential that an immediate decision be taken with regard to this matter, or we shall find ourselves without acceptable magnetos. Wd. Ltr.CHK/HC.6 att. | ||
| Scan285 | Copy of a letter from North & Sons, Ltd. regarding the manufacture and modification of magnetos. | ||
| View original record | COPY OF LETTER FROM:- MESSRS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. Your Ref. Wd19/NJ11525. Our Ref. CHK/HC.6. 14th May. 1925. Messrs. Rolls-Royce Ltd., DERBY. Dear Sirs, We thank you for your… | ||
| Scan286 | Letter from North & Sons Ltd. discussing a proposal for an order of machines and associated modifications. | ||
| View original record | - 2 - 14th May. 1925. Messrs. Rolls-Royce Ltd. to be delivered off the order in hand. If this were done and the left hand machines which have already been delivered were returned to us so that the… | ||
| Scan287 | Report from North & Sons Ltd regarding the modification and repair of a fractured Watford Magneto Contact Breaker B.9224. | ||
| View original record | X. 8796% EFC. from Wd. C. to Dn. Wd3/NJ/16.5.25. X.4181 - Watford Magneto. The Watford Magneto Contact Breaker B.9224 referred to in yours EFC3/T9.5.25 was returned to North & Sons Ltd. on the 11th… | ||
| Scan288 | Chassis 93-NK after 15,447 miles, detailing issues and repairs to the magneto and ignition system. | ||
| View original record | X8796 Extract from GWH2/Crn20.5.25. REPORT ON CHASSIS 93-NK after 15,447 MILES (IN FRANCE) X2454 Magneto has been dismantled and we found the H.T. brush stuck right up in the holder, which has caused… | ||
| Scan289 | Correspondence with North & Sons regarding testing and modifications for a Watford Magneto No. 81062. | ||
| View original record | EFC. from Wd. C. to By. (struck through) C. to Mx. (struck through) X8396. Wd6/NJ22.5.25. X.4181 - Watford Magneto No. 81062 with improved location of sleeves. Upon receipt of EFC2/T13.5.25, we wrote… | ||
| Scan290 | Quoting a reply from North & Sons Ltd. concerning the testing and repair of a Watford EO.6 Magneto. | ||
| View original record | X 8796 EFC. from Wd. Wd's Dept. Wd. is absent. Wd/3/NJ3.6.25. X.4181 - Watford EO.6 Magneto No.77606. The remarks in yours EFC3/T15.5.25 were duly communicated to North & Sons Ltd. and we are this… | ||
| Scan291 | Alteration to the inspection and test specification for a Watford Type EC6(d) magneto. | ||
| View original record | To BY. from EFC. c. SFT/Mr. Brock. c. Test Dept. X 8796 EFC2/T11.6.25. X.8781m. WATFORD TYPE EC6(d) MAGNETO FOR EAC.CHASSIS. Herewith please receive new Page 1 of the Production Specification of… | ||
| Scan292 | Special E.O.6 Magneto, No. 82558, brought in for testing. | ||
| View original record | My/Chat. c. to EFC. X8796 Wd/Dn7/BH17.6.25. We hand to you herewith E.O.6. Magneto No. 82558, brought to these works this afternoon by Mr. North of North & Sons Ltd. Watford. The Magneto in question… | ||
| Scan293 | Instruction sheet detailing the test schedule and results for a Watford E06d magneto. | ||
| View original record | RR 238 (150 BKS.) (BH57. 29-6-20.) MP 324355 X E796 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.F.B. Date: 6-7-1925 Order No.: WB28 Customer's No.: X4181d Watford E06d magneto NO 82558 with increased air gap… | ||
| Scan294 | Instructions and observations regarding magneto performance and characteristics. | ||
| View original record | RR 238 (150 BKS.) (BH57.29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To 19 Order No. 2 Customer's No. being!- a. 235 rpm b. 215 " c. 200 " Production limits 230 rpm 210 " 190 " The following… | ||
| Scan295 | Instructions sheet with a handwritten report on the performance and noise levels of a magneto. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. RR 239 (100 BKS.) (BH57.28-8-20.) MP 224386 To 19__ Order No. 3. Customer's No. 4. The noise emanating from this magneto was considered to be quite reasonable, the… | ||
| Scan296 | Instruction sheet detailing the advantages of a feature improvement on a magneto's mechanical performance. | ||
| View original record | RR 235 (150 BKS.) (SH57. 29-8-20.) MP 224388 ROLLS-ROYCE LTD. INSTRUCTIONS. To 19 Order No. 4. Customer's No. which is even now considered to be quite reasonable. The improvement this feature effects… | ||
| Scan297 | Requesting the reconditioning of Watford E06 magnetos and their modification to match a new larger air gap design. | ||
| View original record | To Wd. from EFC. X8796 EFC7/T8.7.25. X.4181d - WATFORD E06 MAGNETOS.60° RANGE. No.73970/2. Some special tests have been carried out on these magnetos by which their efficiency has been somewhat… | ||
| Scan298 | Test report on a Watford EC6d Magneto, serial number 82558, with a modified air gap. | ||
| View original record | To Wd. from EFC. c. EY. V8796 EEC10/T8.7.25. X4181d. WATFORD EC6d MAGNETO No. 82558 with INCREASED AIR GAP BETWEEN THE POLE SHOES AND THE SLEEVE. We have now completed a tests on this magneto,… | ||
| Scan299 | The performance and noise reduction of an altered magneto, following an assistant's test. | ||
| View original record | Contd. -2- EFC10/T8.7.25. As regards the object ofthis alteration, e.g. the reduction of noisiness of the magneto, the following is quoted from my assistant's report on the test of this machine :- "… | ||
| Scan300 | Explaining the methodology for creating and interpreting utility performance curves for magnetos. | ||
| View original record | UTILITY PERFORMANCE CURVES OF MAGNETOS. These curves are drawn on a horizontal base of angular position of primary break with a vertical scale of speed in r.p.m. The datum for the angular position of… | ||
| Scan301 | Performance comparison of a special magneto against a standard machine, noting its compliance with specifications. | ||
| View original record | -2- Contd. The dotted lines give the limits of performance defined by the specification, and it will be seen that this particular special magneto complies with this more readily than the standard… | ||
| Scan302 | Utility performance curves for standard annular gap and leak of Watford magnetos. | ||
| View original record | UTILITY PERFORMANCE CURVES, OBTAINED ON STANDARD ANNULAR GAP AND LEAK, OF WATFORD MAGNETOS. SPEED (r.p.m.) ANGULAR POSITION OF BREAK WATFORD E6b MAGNETO, NO. 82558 (LARGER AIR GAP) RANGE 63° WATFORD… | ||
| Scan303 | Instruction to dispatch two magnetos to Messrs. North & Sons for re-conditioning. | ||
| View original record | [Handwritten top center] KFS 96 [Struck through] D/W c. to [Struck through] My/Chat. c. to [Struck through] My/WH. c. to EPC. Wd/Dn19/HH9.7.25. Please despatch to Messrs. North & Sons Ltd. Whippendell… | ||
| Scan304 | Instruction sheet detailing the failure of a Watford magneto on a 10 EAC 2 engine during testing. | ||
| View original record | RR 238 (150 BKS.) (RH57/23-6-20.) MP 224356 X-8796 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.F.B Order No. WB 32 Customer's No. X4181d Watford E0bd magneto NO 77696 This magneto has failed on 10 EAC 2… | ||
| Scan305 | Instruction sheet detailing the causes of magneto service failures. | ||
| View original record | RR 23A (100 BKS.) [AHDT.29-6-20.] MP 324356 ROLLS-ROYCE LTD. INSTRUCTIONS. To____________________ 19__ Order No.____________ Customer's No._____________ a low resistance path to earth for the H.T.… | ||
| Scan306 | Faulty H.T. collector from a Watford EO6 Magneto on an experimental car. | ||
| View original record | To Wd. from EFC. c. BY. X879/6 EFC4/T20.7.25. X.4181d. WATFORD EO6 MAGNETO No.77696. Herewith we send to you a H.T. collector from the above magneto, of which the insulation has failed whilst the… | ||
| Scan307 | Request for magneto spare parts for experimental trials at the Chateauroux French base. | ||
| View original record | To Wd. from EFC. X8796 EFC5/T21.7.25. MAGNETO SPARES FOR CHATEAUROUX (French base for Experimental Trials). Would you kindly obtain at the earliest possible moment the following magneto spares which… | ||
| Scan308 | Complaint regarding a flopping noise in a Watford Magneto and a scheduled visit from North & Sons Ltd. to investigate. | ||
| View original record | X.8796 By from Wd e.to Mr c.to EFC. Wd12/NJ25.8.25. EO.6 Watford Magneto 60º range. Please note, Mr.Allen of North & Sons Ltd. will be here between 1.30 and 1.45 p.m. on Thursday next, 27th inst. to… | ||
| Scan309 | Modifications to the New Phantom Magneto and reporting a peculiar ignition issue on a car. | ||
| View original record | To Hs. from R. c. to CK. c. BY. X 8796 R8/M25.8.25. NEW PHANTOM MAGNETO. X.8790. X.4181d. It will be remembered that it was suggested here that the friction on the magneto should be removed, and a… | ||
| Scan310 | Watford EC6 magnetos with modified sleeve location and larger air gap. | ||
| View original record | X.8796 EFC1/T26.8.25. X.41814. EXPL. WATFORD EC6 MAGNETOS WITH BETTER LOCATION OF SLEEVE AND LARGER AIR GAP. 81062. This has only better location of sleeve. It was received on 12.5.25 and put on… | ||
| Scan311 | The investigation and rectification of noisy magnetos for the New Phantom chassis. | ||
| View original record | X 8796 U. Wor. O.Ma. C. Hs. G. Hk. BY15/H. 31.8.25. NEW PHANTOM CHASSIS MAGNETOS. --------------------------- With reference to the question of noisy magnetos, this matter has been under consideration… | ||
| Scan312 | Magneto faults, specifically 'sleeve flopping', and proposed solutions following a meeting with the supplier, Messrs North & Sons. | ||
| View original record | - 2 - housing. The sample magnetos supplied at the time were distinctly better than our standard production, but further experience has shown that taken over the mass of magnetos delivered, we are no… | ||
| Scan313 | Ongoing magneto faults from supplier Messrs Norths and recommendations for redesign for the New Phantom engine. | ||
| View original record | - 3 - BY15/H. 31.8.25. ---------------- therefore it would appear there is no reasonable ground for continuing to return magnetos to Messrs Norths to have this fault merely temporarily corrected.… | ||
| Scan314 | Modifications from a supplier to a sample magneto for a New Phantom chassis to address a noise issue. | ||
| View original record | 18796 To RY. from Wd. c.to or. c.to Hs. c.to Hx. c.to WP. Wd/K3.9.25. NEW PHANTOM CHASSIS MAGNETOS. Referring to EY15/H.31.8.25, we are now in receipt of a letter from Messrs.North & Sons Ltd., as… | ||
| Scan315 | Improvements to the magnetos for the New Phantom chassis in comparison to the Silver Ghost. | ||
| View original record | Dir - from Wor. W.J. o. Hs. M.W. E.W.P. X8796 Wor9/M3/9/25. Re New Phantom Chassis Magnetos. I have your very complete report BY15/HS1/S/25 on this subject, and note with pleasure Messrs North & Sons… | ||
| Scan316 | Instructions regarding two faulty Watford E6bd magnetos needing reconditioning and modification. | ||
| View original record | X. 8796 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.b. Order No. WB 39 Customer's No. X 4181d 3 - 9 - 1925 Watford E6bd Magnetos Nos. 77696 and 81062 These two magnetos were returned to us from the Test… | ||
| Scan317 | Letter from North & Sons Ltd. regarding modifications to a magneto to reduce noise. | ||
| View original record | COPY. ----- NORTH & SONS LTD. WHIPPENDELL ROAD, WATFORD. Ref:- CEK/HC.5. 7th Sep. 1925. Messrs Rolls-Royce Ltd. Derby. ------ Dear Sirs, For attention of Mr Whitehead. Following our conversation over… | ||
| Scan318 | Letter confirming the dispatch of a modified K.O.6 Magneto for a New Phantom Chassis. | ||
| View original record | V8796 Wd3/K8.9.25. NEW PHANTOM CHASSIS MAGNETOS. I confirm mine Wd1/K3.9.25, and send you herewith copy of a letter from Messrs.North & Sons Ltd., dated 7th inst. advising the despatch to us of a… | ||
| Scan319 | Instruction note on the testing of a Watford E06 magneto, highlighting a high minimum sparking speed. | ||
| View original record | X-8796 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.B Order No. WB 41 Chassis's No. X 4181d Watford E06 magneto No 71063 This magneto has now been tested to our production specification and found to be OK… | ||
| Scan320 | Supplier visit to North & Sons Ltd. regarding modifications and delivery of New Phantom chassis magnetos. | ||
| View original record | By from Wd. c.to Wer. c.to Hs. c.to Mx. c.to CO/Dn. Y8796 Wd1/NJ15.9.25. NEW PHANTOM CHASSIS MAGNETOS. I visited North & Sons Ltd., Watford, yesterday and reported to them that the modified magneto… | ||
| Scan321 | List of 60° range negative rotation magnetos present in the laboratory. | ||
| View original record | X8796 16.9.25. LIST OF 60° RANGE NEGATIVE ROTATION MAGNETOS AT PRESENT IN LAB. Make. Type No. Remarks. Watford. E06d. 77606 Made up-to-date. S.C. tests. " " 81062. Off test bed. " " 77696 " " " " "… | ||
| Scan322 | The poor performance of Watford EO6 magnetos and their return for reconditioning and modification. | ||
| View original record | X8796 To Wd. from EFC. EFC4/T12.10.25. X.4181d. WATFORD EO6 MAGNETOS. NOS. 77696 & 81062. The above magnetos were returned to us from the Experimental Test House as not being up to scratch in… | ||
| Scan323 | Letter concerning the supply and modification of Watford EO.6 Magnetos with North & Sons Ltd. | ||
| View original record | EFC. from Wd. X8796 Wd6/NJ21.10.25. X.4181 d. Watford EO.6 Magnetos 77696 & 81062. Yours EFC4/T12.10.25. The 2 magnetos referred to in your note were duly despatched to North & Sons Ltd. and we are… | ||
| Scan324 | Letter from a supplier regarding a misunderstanding over magneto modifications and quoting for remedial work. | ||
| View original record | COPY OF LETTER FROM:- MESSRS. NORTH & SONS LIMITED. WHIPDENDELL ROAD, WATFORD. Your ref. Wd2/NJ161025. Our Ref. CHK/HC.16. 20th October 1925. Messrs. Rolls-Royce Ltd., DERBY. Dear Sirs, We beg to… | ||
| Scan325 | Instruction to Messrs. Norths to proceed with making two Watford E06d magnetos. | ||
| View original record | To Wd. from EFC. X8796 EFC9/T27.10.25. X.8796 - WATFORD E06d MAGNETOS. Answering your Wd6/NJ/21.10.25. will you please instruct Messrs. Norths to proceed with making the two magnetos Nos. 73970/2 up… | ||
| Scan326 | The failure of a Watford magneto H.T. collector brush due to carbonization, with a recommendation to use stabalite. | ||
| View original record | X8796 To Wd. from EFC. c. BY. EFC3/T16.11.25. X.8796. RE WATFORD MAGNETOS. Herewith we hand to you a H.T. collector brush which has tracked and carbonized, forming a conductor to earth for the H.T.… | ||
| Scan327 | Reply from North & Sons Ltd. regarding a faulty H.T. Pick-up on Watford Magnetos. | ||
| View original record | EFC. from Wd. C. to By. X.8796. Wd6/NJ25.11.25. X.8796 - Watford Magnetos. In reply to yours EFC3/T16.11.25, North & Sons Ltd. have written under dated 24th inst. as follows:- "Regarding the faulty… | ||
| Scan328 | Damaged Watford magneto armature and suggestions for design improvement. | ||
| View original record | X8796 To Wd. from EFC. EFC3/T26.11.25. X.8796- WATFORD MAGNETOS FOR EAC. We send you herewith an up-to-date magneto armature stamped 87889 in which the insulating flange of the slip ring is cracked in… | ||
| Scan329 | The materials and performance of B.T.H. and Watford magnetos, particularly concerning the H.T. collector. | ||
| View original record | Contd. -2- EFC3/T26.11.25. noise from these B.T.H. magnetos, even than with the latest type of Watford magneto with better located sleeve. We therefore suggest this point for the consideration of… | ||
| Scan330 | Testing and return of a faulty Watford magneto for an EAC engine. | ||
| View original record | X8796 To Wd. from EFC. EFC8/T26.11.25. X.8796 - WATFORD MAGNETOS FOR EAC. We send you herewith Watford magneto EU6d No.81100 and my assistant's report in this connection is as follows :- "This magneto… | ||
| Scan331 | Quotation from North's for modifying two magnetos. | ||
| View original record | X8796 Wd/Dn2/EH4.12.25. sent from OO 7/12/25 D EFC. Re E.O.6. Magnetos No. 77696 and 81062. -------- It will be remembered that the above two Magnetos were despatched to North's to your instructions… | ||
| Scan332 | Letter from North and Sons Ltd. regarding the testing and quotation for the repair of magnetos. | ||
| View original record | COPY. NORTH AND SONS, LIMITED. WHIPPENDALL ROAD, WATFORD. Your ref. Wd/Dn10/HH231125. Our ref. WJN/HC.16. 1st Dec, 1925. Messrs. Rolls-Royce Ltd. DERBY. Dear Sirs, We are in receipt of your letter of… | ||
| Scan333 | Request to obtain half a dozen Watford magneto distributor brushes and springs for spares. | ||
| View original record | To Wd. from EFC. X8796 EFC2/T8.12.25. X.8796 - WATFORD MAGNETOS. Would you kindly obtain for us for spares 1/2 dozen Watford magneto distributor brushes and springs (fractured sample attached). EFC. | ||
| Scan334 | Change of plan for two Watford EC6 magnetos, which are now to be reconditioned instead of modified. | ||
| View original record | To Ms/Dn. from EFC. X8796 EFC2/T9.12.25. X.8796 - WATFORD EC6 MAGNETOS NOS. 77696 & 81062. Answering your Wd/Dn2/BH4.12.25, owing to change in circumstances, it is not now necessary to have these… | ||
| Scan335 | Production inspection and test log for a Watford Type E06 (d) Magneto. | ||
| View original record | X.8781m - WATFORD TYPE E06 (d) MAGNETO. X.[struck through] 8796 PRODUCTION INSPECTION AND TEST. Date. | Magneto No. | (1) Remarks. | (2) Range (degrees) (>58°) | (3) Remarks. | (4) Tangl. Force 3 to 5… | ||
| Scan336 | Test report recording the design and performance details of a magneto. | ||
| View original record | X. 8796. X. 430. FORM OF RECORDING DETAILS OF MAGNETO DESIGN AND PERFORMANCE. Date:- 23-11-25 Magneto on test:- Maker :- Watford (North and sons Ltd) X. No. :- 4181d Type :- E06d No :- 73970 (1)… | ||
| Scan337 | Specifications for a sleeve magneto, detailing primary point gap and contact breaker timing angles. | ||
| View original record | -2- Contd. (4) Primary point gap :- .012" Sleeve and contact breaker timing.:- Sleeve advance angle :- +30° Sleeve retard " : - 33° Contact breaker angles in relation to sleeve:- Make. Break. -96° 61°… | ||
| Scan338 | Test results for endurance, short circuit, open circuit, and an open circuit primary volt-speed curve. | ||
| View original record | (3) (6) Endurance test :- OK (7) Short circuit test :- OK (8) Open circuit test :- OK (9) Open circuit primary volt-speed curve. Speed. Volts. Volts/Speed. 400 2.64 800 4.77 1200 6.84 1600 8.47 2000… | ||
| Scan339 | Test results for ampere-speed curve, utility tests, and sparking characteristics. | ||
| View original record | -4- (10) Closed circuit primary ampere-speed curve. Speed. Amperes. Speed. Amperes. 100 .62 1200 3.56 200 1.13 1600 3.81 300 1.60 2000 3.93 400 2.02 2400 4.03 600 2.61 2800 4.10 800 3.11 3200 4.16… | ||
| Scan340 | Test data sheet for sleeve magnetos, detailing secondary milliamps, primary point gap, and contact breaker timing. | ||
| View original record | -5- (14) Secondary milliamps :- Maximum :- 17.1 Minimum :- 10.0 (15) Primary point gap after previous test:- .011" Primary point gap :- .016" Contact breaker timing. | Make. | Break. | | -94° | 58° |… | ||
| Scan341 | Remarks on operational noise from components like gears, bearings, and magnetos, with suggestions for reduction. | ||
| View original record | -6- (16) Remarks re silence of operation:- Sleeve noise reduced, Gears noisy especially at about 1200 rpm. Bearings hum at high speeds. Contact breaker noisy. General noise of these magnetos could… | ||
| Scan342 | Communication regarding a fault investigation on Watford Magneto No. 81100. | ||
| View original record | EFC.from Wd. X 8796 Wd2/NJ14.12.25. X.8796 - Watford Magnetos for EAC. Upon receipt of yours EFC8/T26.11.25, we communicated to North & Sons Ltd. your remarks with regard to Watford EO.6 magneto… | ||
| Scan343 | Watford Magnetos for EAC, discussing communications with North & Sons Ltd. regarding a returned armature. | ||
| View original record | EFC. from Wd. X8796 Wd8/NJ21.12.25. X.8796 - Watford Magnetos for EAC. The remarks in yours EFC3/T26.11.25 were duly communicated to North & Sons Ltd. and on the 8th inst. Mr. North came here and you… | ||
| Scan344 | Letter from North & Sons Ltd. discussing modifications and materials for a magneto, including slip rings, armature covers, and high-tension pick-ups. | ||
| View original record | COPY OF LETTER FROM:- NORTH & SONS LIMITED., WHIPPENDALL ROAD WATFORD. Our Ref. CHK/HC.20. Your Ref. Wd11/NJ171225. 18th December 1925. Messrs. Rolls-Royce Ltd., DERBY. Dear Sirs, We beg to… | ||
| Scan345 | Instructions for the re-assembly and testing of a Watford E6bd magneto with a new slip ring. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. To E.F.B. Order No. WB69 Customer's No. X8796 Watford E6bd magneto NO 85204 We have now assembled this magneto having received back the armature fitted with a new slip… | ||
| Scan346 | Disposition of several Watford magnetos no longer required by the Experimental Department. | ||
| View original record | X8796 To Ms. from EFC. EFC5/T30.12.25. X.8796 - WATFORD MAGNETOS NOS.84484 & 77606. Please refer to Hm/WW3/W24.12.25. Will you please let me know what to do with these two magnetos which are no longer… | ||
| Scan347 | Conversion of two Watford magnetos to the white base type. | ||
| View original record | X8796 To Wd/Dn. from EFC. EFC2/T31.12.25. X.8796 - E06 WATFORD MAGNETOS NOS.77696 & 81062 Further to our EFC2/T9.12.25, as we do not now require these magnetos, and the Repair Dept. would prefer to… | ||
| Scan348 | Return of a Watford EO6d magneto contact breaker for repair. | ||
| View original record | X8796 To Wd. from EFC. EFC2/T21.1.26. RE WATFORD MAGNETO. Herewith we send you one Watford EO6d magneto contact breaker. Would you kindly return this to the makers for repair. EFC. | ||
| Scan349 | Graph showing open circuit volt-speed and short circuit ampere-speed curves for B.T.H. and Watford magnetos. | ||
| View original record | X8996 WATFORD, NO 73970. B.T.H. NO 356147 B.T.H. NO 356071 VOLTS AMPERES OPEN CIRCUIT VOLT-SPEED AND SHORT CIRCUIT AMPERE-SPEED CURVES OF PRIMARY WINDINGS OF B.T.H. FM6. AND WATFORD Eobd MAGNETOS.… | ||
| Scan350 | Performance of Standard Watford magnetos, comparing flat cams with long cams. | ||
| View original record | To Wd. from EFC. c. BY. EP. X8796 EFC3/T27.1.26. X.8796 - STANDARD WATFORD MAGNETOS. It would be interesting to know why the Watford Magneto Co. fit the magnetos which they supply to us with flat cams… | ||
| Scan351 | Magneto sparking performance, comparing different models and the effect of long cams. | ||
| View original record | Contd. -2- EFC3/T27.1.26. It is quite a definite fact that these other magnetos will spark very much more readily a given set of ordinary gaps, or on leaky gaps, at higher speeds than the standard… | ||
| Scan352 | Magneto timing, comparing the make and break periods of different magneto types to optimise performance. | ||
| View original record | EFC3/T27.1.26. -3- Contd. in a magneto without a sleeve. That means to say that approximately we have only to consider one timing of the make, i.e. that in relation to the sleeve, for all positions of… | ||
| Scan353 | The use of long cams to reduce the noise of the contact breaker in magnetos. | ||
| View original record | Contd. -4- EFC3/T27.1.26. There would appear to be a further advantage in the use of long cams in reducing the noise of the contact breaker, and particularly if a continuous cam ring is used as in the… | ||
| Scan354 | Note discussing the wear and life of platinum points and the distribution of the document. | ||
| View original record | ✓ 4052? EFC3/T27.1.26. -5- Contd. react quite favourably on the life of the platinum points, some of the wear of which may be due to the hammering action which on our suggestion may be reduced. EFC.… | ||
| Scan355 | Request to obtain spare contact breaker screws with platinum points for a Watford EO6 magneto. | ||
| View original record | Y8796 To Roy. from EFC. EFC2/T30.9.27. WATFORD EO6 MAGNETO. O/N.54733. Will you kindly obtaine for us as spares :- 2 Contact Breaker screws fitted with platinum points. These are for use on the… | ||
| Scan356 | The testing of a Watford E.O.6 type Magneto No.99158, previously reported as faulty. | ||
| View original record | EFC. c.c to Mr Swift/Mr Ellis. X.8796 ROY/JT12/HP5.10.27. Watford E.O.6 type Magneto No.99158. This is the magneto referred to in yours EFC3/T5.9.27 and EFC2/T14.9.27 as having completely failed to… | ||
| Scan357 | Transitioning to new Phantom magnetos from supplier Messrs. North & Sons. | ||
| View original record | X8796 BY/7/Gll.11.27. Hs. ROY. Wor. ----- PHANTOM MAGNETOS. X.8796. X.7791. I attach hereto copy of letter received from Messrs. North & Sons, as a result of my writing them pointing out that we… | ||
| Scan358 | Letter from North & Sons Ltd. concerning the production and supply of magnetos. | ||
| View original record | COPY FROM:- NORTH & SONS LTD., WHIPPENDALE ROAD, WATFORD. Our ref. CHK/IT.5. 10th November, 1927. Your ref. EY1/G8.11.27. Messrs. Rolls-Royce Ltd., Derby. Dear Sirs, MAGNETOS: We thank you for your… | ||
| Scan359 | The production readiness of sleeveless Watford Magnetos from North & Sons and internal concerns about ongoing testing failures. | ||
| View original record | X8796 EX. from ROY. c. to Hs. c. to EFC -------------- MAGNETOS ROY1/MG12.11.27 -------------- X7791 Messrs. North & Sons advise that the Tools, Jigs, Gauges etc for production of the sleeveless type… | ||
| Scan360 | Requesting the return of two worn contact breaker levers from a Watford Chassis Magneto for repair. | ||
| View original record | To ROY. from EFC. X6796 EFC2/T9.12.27. WATFORD CHASSIS MAGNETOS TYPE EO6 Herewith we hand to you two contact breaker levers and worn down platinum screw points, etc. from the above magnetos. Would you… | ||
| Scan361 | Arranging the collection and despatch of EO6 Watford magnetos from the Experimental Department. | ||
| View original record | To O.O/Dn. from EFC. c. Hs/CEP. X8796 EFC1/T13.1.28. EO6 WATFORD MAGNETOS. Following our conversation, it is now arranged that Mr. Priestley is arranging for the collection and despatch of all the EO6… | ||
| Scan362 | Confirming the transfer of four E.O.6 Watford magnetos and seeking disposal instructions for a fifth. | ||
| View original record | X8796 To Roy/Dn. from Hs/CEP. C. EFC. C. G/Rh. Hs/CEP2/BE. 24.1.28. E.O.6. WATFORD MAGNETOS This is to confirm that we have let you have four E.O.6. L.H. Watford magnetos Nos. 68109, 73970, 78382 and… | ||
| Scan363 | The modification and testing of Duralumin rocker arms for a Watford E.O.6 Magneto. | ||
| View original record | EFC. X8796 BY/Cgh7/G.25.1.28. WATFORD E.O.6 MAGNETO. We hand you herewith four Duralumin rocker arms for the contact breakers on the above magnetos. These rocker arms have been modified by Messrs.… | ||
| Scan364 | Requesting disposal instructions for a replaced E.O.6 Watford Magneto. | ||
| View original record | To. [redacted] from Hs/CEP. C. to EFC. C. to C/AD. [This line is struck through] X 8796 Hs/CEP16/BE. 1.2.29. E.O.6. WATFORD MAGNETOS Further to correspondence in connection with the above, we have… | ||
| Scan365 | The poor quality and excessive noise of Watford E.O.6 Magnetos. | ||
| View original record | X8796 By c. EFC A NOTE for Mr Ellis from Mr. Mx3/T4.2.28 Watford E.O.6. Magnetos We have on numerous occasions had to take exception to the quality of Magnetos from the point of view principally of… | ||
| Scan366 | Correspondence regarding disposal instructions for an E.O.6 Watford Magneto that has been replaced. | ||
| View original record | To Roy/Dn. from Hs/CEP. C. EFC. C.C. G/Nb. X8796 Hs/CEP5/BE. 7.2.28. RE: E.O.6. WATFORD MAGNETOS Further to correspondence in connection with the above, we have still another E.O.6. Watford Magneto… | ||
| Scan367 | Covering memo for an assistant's report on a special duralumin contact breaker lever for a Watford Magneto. | ||
| View original record | BY. Mx. c. X8796 EFCl/T28.2.28. WATFORD MAGNETO. SPECIAL CONTACT BREAKER LEVER. Attached please find attached copy of my assistant's report on one of these special duralumin contact breaker levers. We… | ||
| Scan368 | The high-speed endurance testing of special duralumin contact breaker levers for Watford magnetos. | ||
| View original record | X.8796. EFC. WC.80. WATFORD CHASSIS MAGNETO CONTACT BREAKER. We have had some special duralumin contact breaker levers for test on standard Watford magnetos. The special feature of these levers is… | ||
| Scan369 | Serious supply shortage of E0.6 magnetos for 40/50HP chassis. | ||
| View original record | [Handwritten] E.F.C See Hays Ery EFC from Mx Y8796 [Typed] Mx3/T1.3.28 re 40/50HP Chassis - E0.6. Magnetos ------------------------------------ We appear to be getting into rather a serious position… | ||
| Scan370 | The disposal of an E.O.6 Watford Magneto that has been replaced. | ||
| View original record | X8796 To Reg/Ex. from Hs/CEP. c. to EFC. c. to G/Rb. Hs/CEP3/BE. 5.3.28. RE: E.O.6.WATFORD MAGNETOS Further to correspondence in connection with the above, we have another E.O.6. Watford Magneto… | ||
| Scan371 | The disposal of an E.O.6. Watford Magneto. | ||
| View original record | To Roy/Dn. from Hs/CEP. (Struck through) c. to EFC. (Struck through) c. to G/Hb. (Struck through) X8796 Hs/CEPS/BE. 7.3.28. RE: E.O.6. Watford Magnetos Further to correspondence in connection with the… | ||
| Scan372 | Extract from a letter detailing the decision to switch to using bakelite pinions in magnetos to reduce noise. | ||
| View original record | X8796 Extract from Messrs. North's letter of 23.3.28. (X.7791) We have made large numbers of magnetos with steel pinions and bakelite gears but found such magnetos definitely noisier than those in… | ||
| Scan373 | The low-speed performance and cold-start issues of Watford EW6 and EC6 type magnetos. | ||
| View original record | EFC. WC.91. X8796 26.3.28. X.8796. X.7791. LOW SPEED PERFORMANCE OF WATFORD EW6 AND EC6 TYPE MAGNETOS. A number of the latest Watford type EW6 magnetos have been rejected by the Test Dept. owing to… | ||
| Scan374 | Magneto performance issues at low speeds, comparing various types and proposing revisions to production specifications. | ||
| View original record | -2- The E.O.6. production specification limits of low speed performance are :- Advance 280 r.p.m. Retard 190 r.p.m. It appears therefore that the EW6 type magneto has insufficient energy at low speeds… | ||
| Scan375 | The suspected depreciation of magnetism in Watford magnetos. | ||
| View original record | X8796 To Mx. from EFC. c. Roy. c. Ev. EFC3/T28.4.28. WATFORD MAGNETOS TYPES EC6, EW6 and ROL. We suspect that Watford magnetos are subject to some depreciation of magnetism after delivery to us and… | ||
| Scan376 | The efficiency and depreciation of magnetism in Watford Magnetos, types E06 and R01. | ||
| View original record | EFC X8796 Mx10/T30.4.28. X7791 X579 X8796 WATFORD MAGNETOS TYPES E06 and R01. In reply to your EFC3/T28.4.28, we have not up to the present any means of determining whether there is any depreciation… | ||
| Scan377 | Specifications for the windings and condenser of a Watford Magneto Armature. | ||
| View original record | E7.C X.8796 8.5.28. 3 E06 WATFORD MAGNETO ARMATURE. PRIMARY - 148 turns of .028 - 22 S.W.G. enamelled Copper Wire in four layers, wound within 1/8" of ends of core, the core being well insulated. No… | ||
| Scan378 | List of alterations to a governor and magneto assembly for a 10,000-mile endurance test. | ||
| View original record | contd :- -4- have fitted up on 12-EX for the next 10,000 miles test has the following alterations. (1) Aluminium governor weights. Half the mass of the original steel weights. (2) Duralumin small… | ||
| Scan379 | The performance of light governor weights versus stronger control springs due to oil viscosity. | ||
| View original record | contd :- -5- The disadvantage of using light governor weights is the fact that they suffer when the oil is cold and the viscosity affects the small inner piston. We should prefer using stronger xxxxxx… | ||
| Scan380 | Twelve-month warranty period for Watford magnetos from manufacturer North & Sons Ltd. | ||
| View original record | X8796 By. from Wd. c. to EFC. c. to Mx. c. to EWT. (Test Dept). c. to Hm. c. to GO/Dn. c. to Roy. Wd5/NJ28.4.26. Watford Magneto. We are in receipt of a letter from North & Sons Ltd., makers of the… | ||
| Scan381 | Inadequacy of the 12-month guarantee period for Watford Magnetos from supplier North & Son Ltd. | ||
| View original record | To Ad-from-Im. X8796 C.c. to BY. C. to EFC. C. to C.H. C. to Test-Dept. C. to ROY. Hm/WW11/W29.4.26. WATFORD MAGNETOS. Wd5/NJ28.4.26. We thank you for your note conveying to us the information… | ||
| Scan382 | Guarantee terms, modifications, and quality concerns with supplier Messrs North & Sons. | ||
| View original record | X8796 Wd. Mr. Hm c. BFC. G. Reg. BY12/H. 29.4.26. It occurs to me that possibly the attitude adopted by Messrs North & Sons. Ltd. is the result of the fact that we have asked them to make at their… | ||
| Scan383 | Warranty disagreement with supplier Messrs. North & Sons for Watford magnetos. | ||
| View original record | X8796 Ldr. from ROY. c. to Hs. c. to HY. c. to EFC. c. to Ex. c. to GWT / Test Dept. ROY2/MG30.4.26 ---------------- WATFORD MAGNETOS ---------------- I certainly think the suggestion from Messrs.… | ||
| Scan384 | Guarantee for Watford Magnetos and a misunderstanding with Messrs. North's. | ||
| View original record | X8796 [strikethrough]Md[/strikethrough] from ROY. c. to Hm. c. to RY c. to EFC c. to HX c. to EHT/Test-Dept. ROY3/MG4.5.26 ---------------------- WATFORD MAGNETOS - GUARANTEE ---------------------- I… | ||
| Scan385 | Letter from North & Sons Ltd. clarifying their policy on replacing faulty magneto parts under an existing arrangement. | ||
| View original record | C O P Y From: NORTH & SONS LTD. Whippendell Road, WATFORD Ref: CHK/HC.7 Ref: ROY1/MG 3rd May 1926 Messrs. Rolls Royce Ltd., DERBY Dear Sirs, We beg to acknowledge receipt of your letter of April 30th… | ||
| Scan386 | Letter to Messrs. North & Sons Ltd. regarding a guarantee for magnetos. | ||
| View original record | Copy Ref: ROY4/MG4.5.26 Your Ref: CHK/HG.7 May 4th.1926 Messrs. North & Sons Ltd. Whippendell Road, WATFORD Dear Sirs, Magnetos - Guarantee We are pleased to see that, as we surmised, your… | ||
| Scan387 | Cause of noise in the Phantom Auto Advance magneto sleeve. | ||
| View original record | To HS/RM & EFC. X8796 Extract from R1/M4.5.26. PHANTOM AUTO: ADVANCE. X.8685. (A) Referring to your memo. of 23.4.26. I understand the noise is caused by the swing of the magneto sleeve due to the… | ||
| Scan388 | The merits of Lucas versus Watford magnetos for the Phantom model. | ||
| View original record | X8796 Extract from R3/M14.5.26. PHANTOM MAGNETO. X.8793. X.8796. The Lucas was examined. It is a less costly machine to produce than the Watford, so that this is a reason for its less purchasing… | ||
| Scan389 | Comparing the Lucas ER6 magneto with the standard Watford magneto, proposing proceeding with tests. | ||
| View original record | To R. from EFC. c. BJ. BY. c. Wor. PN. X8996 EFC1/T7.6.26. LUCAS MAGNETO & PRESENT STANDARD WATFORD MAGNETO. X6793 For the reasons herein detailed it is considered expedient to proceed with tests of… | ||
| Scan390 | Technical report discussing issues and potential improvements for Watford and Lucas magnetos. | ||
| View original record | Contd. -2- EFC1/T7.6.26. capable of producing a really high class machine, particularly with the assistance of Dr. Turner, and as a result of the combination of C.A.V. and Rotax concerns. The standard… | ||
| Scan391 | Report outlining the advantages of using Lucas magnetos and considering alternatives. | ||
| View original record | -3- Contd. The advantages which it is considered would accrue from using Lucas magnetos would be :- (1) Considerably easier control of the cam advance, i.e. less force required to move cam lever. (2)… | ||
| Scan392 | Submission of two magnetos by Messrs. Lucas at their own expense. | ||
| View original record | -4- Contd. At the present moment the two magnetos received have been submitted by Messrs. Lucas at their own expense. EFC. | ||
| Scan393 | Note discussing the testing of a Lucas magneto as a potential replacement for the underperforming standard Watford magneto. | ||
| View original record | X8796 7.6.26. LUCAS MAGNETO & PRESENT STANDARD WATFORD MAGNETO. X8795 (NOTE BY H.E.W.) In our EFC1/T7.6.26 it was definitely stated that it was not our intention to rush this magneto for… | ||
| Scan394 | Report page discussing magneto standardisation, requiring a guarantee of reliability from the Lucas Co. | ||
| View original record | -2- Contd. Also I think we made it clear in our report that we should require a guarantee of reliability from the Lucas Co. in the event of standardisation. We have been very fair with the Watford… | ||
| Scan395 | Comparing Lucas and Watford magnetos, considering price, production methods, and brand reputation. | ||
| View original record | R. BJ EFC. WOr. PN. --- X8796 EY9/H.8.6.26. MAGNETOS. X8793 Referring to EFC1/T7.6.26. I think the lower price of the Lucas machine is, as pointed out by R. due to the fact that its design represents… | ||
| Scan396 | Magneto reliability, distinguishing between noise and failure, and the reputational risks of associating with Lucas magnetos. | ||
| View original record | -2- EY9/H8.6.25. Whether a magneto is produced for a low priced car or not is unimportant, as it should of necessity be of equal reliability in either case. With reference to EFC's point on Page 2… | ||
| Scan397 | Returning a document regarding the Lucas Magneto and the Present Standard Watford Magneto. | ||
| View original record | X8796 EFC. from Wd. Wd6/NJ10.6.26. Lucas Magneto & Present Standard Watford Magneto. I return herewith EFC1/T7.6.26 and thank you for affording me the opportunity of perusing same. Wd. Wd. Note att.… | ||
| Scan398 | Faulty Watford EO.6 magnetos returned to North & Sons Ltd. for inspection and testing. | ||
| View original record | By, from Wd. c. to Mx. c. to EFC. X8796 Wd7/NJ10.6.26. Watford EO.6 Magnetos. Upon receipt of Mxll/T3.5.26 and By4/H4.5.26, we wrote North & Sons Ltd. and returned to them the two magnetos Nos. 89412… | ||
| Scan399 | Letter from North & Sons Ltd. regarding the testing and repair of two returned magnetos. | ||
| View original record | Copy of letter from:- NORTH & SONS LIMITED, Whippendell Road, Watford. Your ref.- Wd4/NJ8626. Ref.- CHK/HC.12. 9th June, 1926. Messrs. Rolls-Royce Ltd., Derby. Dear Sirs, In reply to your letter of… | ||
| Scan400 | Letter regarding an investigation into a complaint about stiff make-and-break cover mechanisms on Watford EO.6 magnetos. | ||
| View original record | By. from Wd. c.to Mx. c.to EFC. X8796 Wd2/NJ11.6.26. Watford EO.6 Magnetos. I confirm mine Wd7/NJ10.6.26 and attach hereto copy of a further letter from North & Sons Ltd. dated 10th inst. reporting… | ||
| Scan401 | Letter from North & Sons Ltd. regarding an investigation into the fitting of magneto sleeves when heated. | ||
| View original record | Copy of letter from:- NORTH & SONS LTD., Whippendell Road, Watford. Ref.- CHK/HC.16. 10th June 1926. Messrs.Rolls-Royce Ltd., Derby. Dear Sirs, Following our letter of yesterday we beg to say that as… | ||
| Scan402 | Confirming a meeting to discuss issues with Standard Watford Magnetos, including long cams and stiff make-and-break cover mechanisms. | ||
| View original record | EFC. from Wd. X8796 Wd3/NJ/14.6.26 RECEIVED 14 JUN 1926 X.8796 - Standard Watford Magnetos. I confirm mine Wd7/NJ/13.4.26. On Wednesday next, 16th inst. Mr.North is coming here and will bring with him… | ||
| Scan403 | Request to modify a Watford E06 Magneto to increase the sleeve's movement range for experimental testing. | ||
| View original record | X8796 To BY/RD. from EFC. c. RHC. EFC2/T18.6.26. X.8796. WATFORD E06 MAGNETO. Will you please give an instruction to the Expl. Shop to modify Watford magneto No. 874/S to render it possible for the… | ||
| Scan404 | Requesting a Watford EO6 magneto contact breaker cover be sent for modification and then returned to the laboratory. | ||
| View original record | To Wd. from EFC. Y8796 EFC2/T26.6.26. RE WATFORD MAGNETOS. With reference to the Watford EO6 magneto contact breaker cover herewith, will you please have this despatched to Messrs. Norths to be fitted… | ||
| Scan405 | The failure of Watford EO6 magneto pick-ups on experimental cars and a query regarding their material composition. | ||
| View original record | To Wd. from EFC. X8796 EFC1/T28.6.26. X.8796 - WATFORD EO6 MAGNETOS Herewith we hand to you two further EO6 magneto pick-ups which have failed on experimental cars. One of these shews tracking. We… | ||
| Scan406 | Desired modification of a Watford Magneto armature sleeve to alter its range of advance. | ||
| View original record | x8796 C. EFC. BY/RD/ML1.7.26. WATFORD MAGNETO. In order to carry the experiments on the Watford Magneto a stage further it is desired to move the armature sleeve relative to its end bearing so that… | ||
| Scan407 | The return of one Watford magneto contact breaker for repair and the exchange of another. | ||
| View original record | To Wd. from EFC. X8796 EFC/T12.7.26. RE WATFORD MAGNETO CONTACT BREAKERS. We hand you herewith 1 Watford magneto contact breaker. Would you kindly have this returned to the makers for repair at our… | ||
| Scan408 | Confirming the completion of modification to a Watford magneto, number 87418. | ||
| View original record | To RHC. from EFC. X8796 EFCL/T1.9.26. X.8796 - WATFORD MAGNETO. We should be pleased to have completed the modification to Watford magneto No.87418, in accordance with BY/RDL/ML1.7.26. EFC. | ||
| Scan409 | Preference for Watford magnetos over those from Lucas and Robert Bosch, citing technical superiority and reliability. | ||
| View original record | To EY. } from R. EFC. } X8796 R6/M2.11.26. RE MAGNETOS. X.8793. LUCAS, WATFORD, ETC. X.7791. We fear to fit Lucas magnetos because they have such a bad reputation, whereas Watfords are considered the… | ||
| Scan410 | And comparing different magneto designs from the Watford Company, with reference to Lucas designs. | ||
| View original record | X8796 EFC. WATFORD MAGNETOS. X7791 BY3/H. 5. 11. 26 RECEIVED 6 NOV 1926 Referring to EFC1/LG. 3.11.26. and the information in R6/M. 2.11.26, the position in regard to magnetos is as follows:- 1. The… | ||
| Scan411 | Curve for the relay advance mechanism developed by the Experimental Department for the Phantom model. | ||
| View original record | - 2 - BY3/H. 5.11.26. Experimental Dept. developed in connection with the relay advance mechanism at present used on the Phantom. A copy of this curve would, I think, meet Mr.North's requirements. BY. | ||
| Scan412 | Letter concerning discussions and experiments with North & Sons Ltd. on the Model EO.6 Watford Magneto. | ||
| View original record | to EFC. from Wd. c. to By. [crossed out] c. to EP. [crossed out] X8796 Wd4/NJ15.11.26 [STAMP: RECEIVED NOV 15 1926 HS] Model EO.6 Watford Magneto. We are in receipt of a letter from North & Sons Ltd.… | ||
| Scan413 | Improving the performance of a Watford E06 magneto by modifying its cams. | ||
| View original record | EFC1/T29.3.26. -7- Contd. correct on principle, we are also giving a similar diagram of Watford E06 magneto No.73972 from actual observation. In these diagrams only two segments of the distributor are… | ||
| Scan414 | The effects of variation in the platinum point gap. | ||
| View original record | EFC1/T29.3.26. -8- Contd. that a variation of +- .004" in the platinum point gap, would cause a variation of perhaps +- 10° in the instant of make, the actual instant of which within these limits is… | ||
| Scan415 | Graph showing flux curves and voltage variation for a Watford E06 Magneto No. 85288. | ||
| View original record | FLUX CURVES OF WATFORD E06 MAGNETO No 85288. CURVE A. SHOWING THE RELATION OF FLUX ANGLE TO THE ANGULAR MOVEMENT OF THE CAM RING. AND CURVE B. SHOWING VARIATION OF O.C. VOLTS WITH ANGULAR MOVEMENT OF… | ||
| Scan416 | Blank document page with a purple ink stamp from the Print Room in Derby. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 30 MAR 1926 DERBY. | ||
| Scan417 | Diagram of the timing for a Watford E06 Sleeve Magneto No 73972 and its distributor. | ||
| View original record | M.A - MAKE ADVANCE. = - 87° M.R - MAKE RETARD = - 25° B.A - BREAK ADVANCE = 64° B.R = BREAK RETARD = 125° B.R. B.A. FLUX AXIS. RETARDED FLUX AXIS ADVANCED M.R. M.A. 22° DIAGRAM OF TIMING OF WATFORD… | ||
| Scan418 | Blank document cover stamped by the Print Room in Derby. | ||
| View original record | OW/P.V ROLLS-ROYCE LIMITED. PRINT ROOM 26 MAR 1926 DERBY | ||
| Scan419 | Magneto spring, friction, and relay motor performance for the Phantom Auto Advance system. | ||
| View original record | To Hs. By.) from R. E. EFC(Le Canadel) c. to CJ. BJ. WOr. X8796 R5/M30.3.36 PHANTOM AUTO: ADVANCE. X.8685. X.8796. In addition to my recent memo, it appears manifest that if the magneto has a suitable… | ||
| Scan420 | Comparison table of Watford EO6 magneto distributor dimensions against suggested dimensions. | ||
| View original record | X8796 31.3.26 COMPARISON BETWEEN WATFORD EO6 MAGNETO DISTRIBUTOR DIMENSIONS AND SUGGESTED DIMENSIONS. | Unit. | Watford dimensions. | Suggested dimensions. |… | ||
| Scan421 | Requesting Mr. Lidsey to fit Watford magneto No. 89479 to 44-PK, replacing magneto No. 87407. | ||
| View original record | X8796 EFC4/T13.4.26. To Mr. Lidsey. X.8796 - WATFORD MAGNETOS. Herewith we hand to you Watford magneto No. 89479. Would you kindly have this fitted to 44-PK replacing magneto No.87407 at present… | ||
| Scan422 | Correspondence with North & Sons Ltd about Standard Watford Magnetos. | ||
| View original record | EFC.from Wd. c.to Ry c.to EP X8796 Wd7/NJ13.4.26. X.8796 - Standard Watford Magnetos. Your note EFC1/T29.3.26 and copy of diagram therein referred to, also your note EFC2/T20.3.26 and diagrams therein… | ||
| Scan423 | Modifications and performance of the Phantom relay advance mechanism. | ||
| View original record | To E. HS )from R. BY. EFC. )(Le Canadel) X8796 RL/M18.4.26. Rec'd at WW. evening of 21.4.26. c. to BJ. WOR. DA. RG. PHANTOM RELAY ADVANCE. X.8685. X.8796. You will remember that I have pointed out… | ||
| Scan424 | Experiments to improve the performance and reduce noise of a Phantom Ignition Governor Relay. | ||
| View original record | To P. from Hs/Sn. c.c. to E.J. c.c. to R.H. c.c. to W.R.W. c.c. to S.R.C. x8796 Hs/Rn2/LG23.4.26. PHANTOM IGNITION GOVERNOR RELAY. X8685 X8796 Since leaving Le Canadel we have been working contin-… | ||
| Scan425 | Piston design and ignition advance characteristics in engine relays. | ||
| View original record | contd :- -2- combination of leather and ring for the realy. We find that the most efficient piston requires a load of 6 lbs. to retard it and the controls and distributor (mag. disconnected) when the… | ||
| Scan426 | Ignition advance governor design challenges, including a graph and tests on alternative piston materials. | ||
| View original record | contd :- -3- [Text from graph] GRAPH I IGNITION ADVANCE DEGREES ENGINE R.P.M. DELAYED LOW SPEED ADVANCE WITH GOVERNOR WTS BEING HELD DOWN WITH SMALL INNER PISTON (ON LATER CONVENTIONAL WTS - STONE… | ||
| Scan427 | Table detailing the relation of maximum flux through an armature to the sleeve position for a Watford Magneto Type E06d. | ||
| View original record | X.8796 EFC. 1.2.26. WATFORD MAGNETO TYPE E06d. No.73972. Relation of max. flux through armature (Ø) to position of sleeve as determined by movement of cam lever. Sleeve position in degrees measured by… | ||
| Scan428 | Letter received from North & Sons Ltd. about Standard Watford Magnetos. | ||
| View original record | EFC. from Wd. c. to By c. to BP. X8796 Wd2/NJ11.2.26. X.8796 - Standard Watford Magnetos. A copy of yours EFC3/T27.1.26 was duly forwarded to North & Sons Ltd. and we are now in receipt of a letter… | ||
| Scan429 | Letter from North & Sons Ltd. discussing the technical difficulties of improving magneto efficiency and advance range. | ||
| View original record | COPY OF LETTER FROM:- NORTH & SONS LIMITED. WHIPPENDELL ROAD, WATFORD. Your Ref. Wd7/NJ1226. Our Ref. CHK/HC.8. 10th February 1926. Dict. 9th February. Messrs. Rolls-Royce Ltd., DERBY. Dear Sirs, We… | ||
| Scan430 | Letter from North & Sons Ltd. discussing magneto output, range of advance and cam design. | ||
| View original record | Sheet No.2. Messrs. Rolls-Royce Ltd. 10th February 1926. The question of output and range of advance is a matter of compromise in a magneto of a given size. The improvement suggested could be obtained… | ||
| Scan431 | Electrical timing and potential improvements to Standard Watford Magnetos, specifically regarding quietness. | ||
| View original record | To Wd. from EFC. C. EY. EP. V6796 EFC1/T12.2.26. X.8796 - STANDARD WATFORD MAGNETOS. Referring to your Wd2/14/11.2.26. with attached letter dated Feb. 10th. from Messrs. Norths, in answer to my… | ||
| Scan432 | Letter from North & Sons, Ltd. acknowledging correspondence and promising a follow-up discussion. | ||
| View original record | X8796 THE BRITISH MADE Watford SPEEDOMETERS & MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON.… | ||
| Scan433 | Experiments on the Phantom Automatic Ignition Advance system, specifically regarding the relay hydraulic motor's power margin. | ||
| View original record | X8796 To Hs. & E. from R. c. CJ. HJ. RG. Wor. Da. Ey. R2/M10.3.26. PHANTOM AUTOMATIC IGNITION ADVANCE. X.8685 X.8790/6 Experiments being made at Derby shew insufficient margin of power on the relay… | ||
| Scan434 | Timing specifications for a Watford E06d Magneto No. 73972. | ||
| View original record | x8796 11.3.26. WATFORD E06d. MAGNETO NO.73972. ------------------------------ Timing of contact breaker in the retard and advance position in relation to the maximum flux position of armature.… | ||
| Scan435 | Distributor dimensions for a Watford E06d Magneto No. 73972. | ||
| View original record | E.F.C. 17.3.26. WATFORD E06d MAGNETO No.73972. DISTRIBUTOR DIMENSIONS. Pitch = 1.26" Range = 62° Make ratio = .85 Forward overlap at advance = .08" " " " retard = .52" Backward " " advance = .63" " "… | ||
| Scan436 | Test data showing the relation of maximum flux through an armature to sleeve position for a Watford Magneto Type EO6d, No. 73972. | ||
| View original record | EFC. E.F.C. 1.2.26. WATFORD MAGNETO TYPE EO6d. No. 73972. Relation of max. flux through armature (Ø) to position of sleeve as determined by movement of cam lever. Sleeve position in degrees measured… | ||
| Scan437 | The friction within the Phantom automatic ignition advance mechanism and Watford magneto. | ||
| View original record | Expt. Report. X.8689. X8796 EFC2/T13.3.26. To R.) from EFC. E.) c. to CJ. BJ. RG. c. to Wor. Ds. Ry. PHANTOM AUTOMATIC IGNITION ADVANCE. X8796 X8796 (Ref. R2/N10.3.26). The friction in the advance and… | ||
| Scan438 | The causes of noise from the magneto sleeve and control linkages, and the challenges in eliminating it. | ||
| View original record | Contd. -2- EFC2/113.3.26. noise from the control linkages themselves when these are new and in "just easy" adjustment, but the bigger complaint of noise is from the magneto itself due to the "flopping… | ||
| Scan439 | The performance, testing, and modification of a Lucas magneto. | ||
| View original record | Contd. -3- As previously reported, we have already experimented with a Lucas magneto in which the necessary range has been obtained without the use of a sleeve. We referred to the advantage of the… | ||
| Scan440 | Machine modifications for chassis tests and the supply status of Lucas magnetos. | ||
| View original record | Contd. -i- EFC2/T13.3.36. of these modifications is to make the machine finally completely satisfactory to our requirements, and there seems good reason to suppose that such machines will be thus… | ||
| Scan441 | From EFC to RHC regarding a suitable Watford Magneto for the 40/50 Chassis (X.8796). | ||
| View original record | To RHC. from EFC. X8796 EFC3/T15.3.26. X.8796 - 40/50 CHASSIS - WATFORD MAGNETO. With reference to the D.O. instruction EY/RD1/ML15.3.2 we have a suitable magneto to which to fit the parts instructed,… | ||
| Scan442 | New scheme for adjustable cams on the Watford Magneto for the 40/50 chassis. | ||
| View original record | X8796 C. EFC. BY/RD/ML15.3.26. RE 40/50 CHASSIS - WATFORD MAGNETO. In order to enable EFC. to experiment and determine the best position of the make and break, we have schemed out a system of… | ||
| Scan443 | Use of Watford magnetos and modifications to the Phantom Automatic Advance system. | ||
| View original record | TO HS. EFC. FROM R. BY. E. BY. (Le Canadel.) Copy to CJ. BJ. PHANTOM AUTOMATIC ADVANCE. ORIGINAL R1/M27.3.26. Rec'd at WW. evening of 31/3/26. X8796 X8685 X8796 Regarding Watford magnetos I feel we… | ||
| Scan444 | Potential improvements to Standard Watford Magnetos regarding performance and noise. | ||
| View original record | To Wd. from EFC. c. By. EP. X8796 EFC1/T29.3.26. X.8796 - STANDARD WATFORD MAGNETOS. Reference your Wd2/NJ11.2.26. We have now thoroughly considered this matter of the timing of the standard Watford… | ||
| Scan445 | Continued discussion on the timing and design of magnetos and distributors for a six-cylinder engine. | ||
| View original record | -2- EFCL/T29.3.26. Contd. next make. It is not, therefore, when the magneto is retarded, necessary for the brush to remain in contact with the segment for the whole time till the next make, and so to… | ||
| Scan446 | The timing of the magneto break, cams, and distributor. | ||
| View original record | Contd. -3- EFC1/T29.3.26. timing, cams and distributor. Regarding the earliness of the present break, we agree with their argument that they have timed the magneto to break earlier and thereby get a… | ||
| Scan447 | The investigation of a failed Watford E06 Magneto. | ||
| View original record | To Roy. from EFC. X8796 EFC2/T14.9.27. WATFORD E06 MAGNETO NO.99158. This is the one magneto which we selected from the batch which you were having sent back, as the one which was reported to have… | ||
| Scan448 | Requesting instructions to return a contact breaker from a Watford E06 magneto to the makers for repair. | ||
| View original record | X8796 To Roy. from EFC. c. Despatch Stores. EFC1/T30.9.27. RE STANDARD WATFORD E06 MAGNETO. We are sending into the Stores 1 contact breaker from an EO6 Watford magneto. Will you please give… | ||
| Scan449 | Delays in experiments with Watford EO6 magnetos and a suggestion for a new magneto design. | ||
| View original record | To Wd. from EFC. X8796 EFC3/T16.11.26. X.8796. WATFORD EO6 MAGNETOS. Answering your Wd4/NJ15.11.26, the experiments referred to are specifically in connection with EO6 sleeve type machines. We have… | ||
| Scan450 | Instruction detailing a failure of the collector brush on Watford E06 magnetos due to oil leakage. | ||
| View original record | RR 238 (100 BKS.) (RH87-20-8-26.) MP 324356 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.B. Order No. WB 112 Customer's No. X 8796 Faulty H.T pick up off Watford E06 magneto on 5EX. We have had a further… | ||
| Scan451 | Instructions regarding a faulty, oversized carbon brush spring causing arcing on the slip ring. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. RR 238 (100 BKS.) (BH57-20-8-20.) MP 224358 To Order No. Customer's No. noted that the carbon brush spring does not always work smoothly which suggests that these… | ||
| Scan452 | Failure of a Watford EO6 magneto H.T. pick-up on an experimental car, with an attached report. | ||
| View original record | To Wd. from EFC. X8796 EFC1/T19.11.26. WATFORD MAGNETO. We hand you herewith a further case of failure of the Watford EO6 magneto H.T. pick-up, on one of our experimental cars, which we should be… | ||
| Scan453 | Faulty H.T. pick-up from a Watford E06 magneto, detailing the cause as a sticking collector brush. | ||
| View original record | WB.112. 18.11.26. FAULTY H.T. PICK-UP OFF WATFORD EO6 MAGNETO ON 5-EX. We have had a further case of failure due to the collector brush sticking up in the H.T. pick-up; on the Watford EO6 magneto… | ||
| Scan454 | Experimental parts received for a Watford EO6 magneto, aimed at noise reduction. | ||
| View original record | X8796 arb. EFC6/T26.11.26. RE WATFORD MAGNETOS. X.8796. X8797 a/b We have to-day received from Mr. Maddocks a Watford EO6 magneto No. 94201 with the following experimental items :- (1) Ebonite… | ||
| Scan455 | Communication detailing a reply from North & Sons regarding experiments on Watford E.O.6 magnetos. | ||
| View original record | EFC. from Wd. X.8796 Wd2/NJ3.12.26 Hs RECEIVED 3 DEC 1926 X.8796 - Watford EO.6 Magnetos. The remarks in yours EFC3/T16.11.26 were duly communicated to North & Sons and we are this morning in receipt… | ||
| Scan456 | Performance of bone grey fibre used for rubbing blocks in battery ignition systems. | ||
| View original record | To Wd. from EFC. X8796 EFC2/T4.12.26. X.4646. BONE GREY FIBRE. X8796 Herewith we hand you a piece of the bone grey fibre from which we have made a number of rubbing blocks for the battery ignition,… | ||
| Scan457 | Requesting an experiment on a new H.T. pick-up with an Ebonite body for a Watford EO6 Magneto. | ||
| View original record | To AJL. from EFC. X8796 EFC1/T15.12.26. STANDARD WATFORD EO6 MAGNETO. New Design H.T. Pick-up with Ebonite Body (in place of Bakelite). We would like you to put this on the magneto on chassis 8-EX for… | ||
| Scan458 | Conversation with Mr. North of the Watford Company regarding various magneto designs and automatic advance mechanisms. | ||
| View original record | X.8796 1 c. EFC. BY4/H. 5.11.26. MAGNETOS. X7791 RECEIVED Hs NOV 5 1926 Referring to R6/M. 2.11.26. having talked the matter over with Mr.North, the position of the Watford Company in regard to the… | ||
| Scan459 | Defective Watford Magneto high tension pick-up and its replacement ebonite part. | ||
| View original record | Hs EFC. from Wd. c. to By. RECEIVED NOV 29 1926 X8796 Wd2/NJ29.11.26. Watford Magneto - High Tension Pick-up. The defective high tension pick-up sent me with yours EFC1/T19.11.26, together with your… | ||
| Scan460 | Proposed improvements for the Phantom and 20HP magnetos. | ||
| View original record | HS. } TO R.R.S. [struck through] FROM R. BY. } x 8796 ORIGINAL. R1/M10.12.26. Copy to [scribbled out] BJ: PHANTOM MAGNETO. Y7791 Mr. North promises a more silent magneto, and one which affects the… | ||
| Scan461 | Follow-up letter requesting a report on an ebonite pick-up for a Watford Magneto. | ||
| View original record | EFC. from Wd. c.to Dy. X8796 Wd5/NJ20.12.26. [Stamp] RECEIVED 21 DEC 1926 Watford Magneto - H.T.Pick-up. I do not appear to have received a reply to mine Wd2/J29.11.26. If you are in a position to… | ||
| Scan462 | The testing status of an ebonite pick-up for a Watford Magneto. | ||
| View original record | X8796 To Wd. from EFC. EFC1/T21.12.26. WATFORD MAGNETO - H.T. PICK.UP. Answering your Wd5/NJ20.12.26, the ebonite pick-up referred to is at present undergoing test on a chassis and will be reported… | ||
| Scan463 | Request to order spare parts for Watford EO6 magnetos and to exchange a contact breaker. | ||
| View original record | To Wd. from EFC. x8796 EFC1/T11.1.27. WATFORD EO6 MAGNETOS. Will you kindly order up as spares for the Watford EO6 magnetos on experimental cars :- 2 H.T. pick-up carbon brushes (slip ring end). 2… | ||
| Scan464 | Confidential memo discussing issues with magnetos for 40/50 and 20 HP models and considering alternative suppliers. | ||
| View original record | X8796 To HS BY.)FROM R. CONFIDENTIAL. EFC.E. )At Le Canadel. copy to EJ. WOR. R4/M23.1.27. DESPATCHED FROM WW. 27.1.27. MAGNETOS FOR 40/50. AND 20 HP. X8796 X7791 I was discussing the above with Mr.… | ||
| Scan465 | Life of magneto platinum points and comparing the performance of Watford and Lucas components. | ||
| View original record | X8796 1 Copy to O & KK VID 3 " EFC. KK VID 1 Copy to O & EC ECE WC.6. (Mirrored Stamped Text Top Right): INSPECTION DEPT. OF MESSRS. ROLLS-ROYCE Ltd. "VIDE" ENGINE OR DERBY VERIFIED BY FOR CHIEF… | ||
| Scan466 | Internal inquiry regarding the lifespan of Watford magneto contact points for the 40/50 chassis. | ||
| View original record | To Hm/NRC. from EFC. X8796 EFC2/T12.2.27. LIFE OF MAGNETO CONTACT POINTS. Have you any figures indicative of the life of Watford magneto contact points for 40/50 chassis ? If so, we should like this… | ||
| Scan467 | Responding to a query on electrical troubles, specifically with Magneto and Battery Ignition points on various car models. | ||
| View original record | 4 To EFC. from Hm/NRC. X8796 NRC7/EW14.2.27. In reply to your query re Electrical troubles - (1). Magneto Platinum Points. X8796 With regard to the E.O.6 Magnetos fitted to all post-war 40/50HP. cars,… | ||
| Scan468 | The performance of trembler coil ignition, high tension distributor points, and dynamo brushes for 20HP models. | ||
| View original record | -2- NRC7/EW14.2.27. When this same type of make and break was used on pre-war cars with the trembler coil, practically no trouble was experienced, but this is hardly a fair comparison for the simple… | ||
| Scan469 | Comparison of the lifespan and performance of different magneto and battery ignition contact points. | ||
| View original record | To R. from EFC. c.c. E. c.c. BY. & WOF. X8796 ANSWERING YOUR COPY. OF MEMO. TO ROLLS-ROYCE LTD. DA EXPERIMENTAL ENGINES ON BEHALF OF LOW CHIEF INSPECTOR OF ENGINES EFC3/LG16. 2.2.27 (218JSQ) LIFE OF… | ||
| Scan470 | The unsatisfactory quietness of Watford EO.6 Magnetos and the testing of a replacement. | ||
| View original record | X8796 Hs [STAMP: SEP 18 1977] [STAMP: RECEIVED] By Wd to EFC from Mr. re Watford EO.6 Magnetos. We seem to have struck a bad patch again with regard to the quietness of above. We returned six which… | ||
| Scan471 | Modifications to a Watford E.O.6. Magneto by Messrs North, leading to a required endurance test and potential delays. | ||
| View original record | X8796 Mr. Wd. c. Wd. c. EFC. ----- BYS/H. 21.2.27. Hs WATFORD E.O.6. MAGNETO. ----------------------------- Referring to MXl/T.18.2.27. unfortunately Messrs North introduced two factors into the… | ||
| Scan472 | Noisy magnetos on the Phantom engine, hypothesizing the cause is wear from the unlubricated automatic advance mechanism. | ||
| View original record | X8796 S/W. Hs. Copy to:- EP. CWB14/GM/11-3-27. I have received a report from the Inspection Department that they are having considerable trouble with magnetos becoming noisy. The suggestion has been… | ||
| Scan473 | Noise issues with the Watford Sleeve Magneto Type EO6 and potential solutions. | ||
| View original record | 1 cc W.S. O'R 1 cc To CWB. from EFC. 1 cc C.EP. X6796 EFCL/T1 4.3.27. RE WATFORD SLEEVE MAGNETO TYPE EO6. X2791 Referring to your memo CWB4/GM.11.3.27: The fault of which you mention is one which we… | ||
| Scan474 | Request for spare parts for a Watford EO6 Magneto, including a replacement for a sheared component. | ||
| View original record | X8796 To Wd.. from EFC. EFC1/T26.3.27. SPARES FOR WATFORD EO6 MAGNETO. Will you kindly obtain for us as spares :- 1 Duralumin lever fitted with platinum point 1 Contact screw fitted with platinum… | ||
| Scan475 | Modifying Watford magnetos for timing tests using special cams. | ||
| View original record | To HY/RD. from EFC. X8796 EFC2/T28.3.27. MODIFICATION TO WATFORD MAGNETOS FOR TIMING TESTS. WITH SPECIAL CAMS. X8796 X 5790 You will remember that some time ago we rearranged the standard Watford EO6… | ||
| Scan476 | Modified H.T. pick-up for the Watford EO6 magneto to resolve issues with sticking carbon brushes. | ||
| View original record | X8796 To BY. from EFC. MODIFIED H.T. PICK-UP FOR WATFORD EO6 MAGNETO. My assistant reports as follows :- "Considerable trouble had been experienced with the H.T. pick-up carbon brush sticking in the… | ||
| Scan477 | Requesting the repair of two failed standard EO6 magneto contact breakers. | ||
| View original record | To Roy. from EFC. X8796 EFC2/LG18.7.27. Herewith we hand you two standard EO6. magneto contact breakers which have failed from continual use. Would you please arrange to have these repaired and… | ||
| Scan478 | The investigation of a Watford Type E06 Magneto. | ||
| View original record | X8796 To Roy, from EFC. EFC3/T5.9.27. WATFORD TYPE E06 MAGNETOS. With reference to the attached, my assistant has looked over these magnetos in the Despatch Stores as you suggested. He has brought… | ||
| Scan479 | Testing of new 'Watford' magnetos as a potential cost-saving replacement for the standard model. | ||
| View original record | X8796 HY. from ROY. c. to Hs. c. to EFC HOY4/WOG.9.27 MAGNETOS Would you kindly advise if tests with the "Watford" Sleeveless Type Magnetos Nos. 99171 and 99802 submitted on the 3rd and 26th ultimo… | ||
| Scan480 | Investigation report on a Watford E06 magneto that failed to spark. | ||
| View original record | RR 239 (150 BKS.) (DD 491-9-12 24) MP 306975 X8796 ROLLS-ROYCE LTD. INSTRUCTIONS. To E. 7. b. Order No. WC34 Customer's No. X8796 Watford E06 magneto No 99158 This magneto was received on production… | ||
| Scan481 | Instructions regarding a faulty magneto with a bad condenser or winding insulation, requesting an explanation from the supplier. | ||
| View original record | RR 238 (150 BKS.) (DB 481-8-12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. Customer's No. bad condenser or faulty primary winding insulation. It is difficult to understand how this… | ||
| Scan482 | Technical report on the operation of Watford magnetos, discussing flux, armatures, and sleeve positioning for high-speed operation. | ||
| View original record | Contd. -4- EFCl/T29.3.26. energy at high speeds by breaking the current very early with the result of keeping the current broken and the platinum point spark at break down to a minimum. But in this… | ||
| Scan483 | Continued analysis of magneto performance, comparing different designs and timing mechanisms. | ||
| View original record | Contd. -5- EFCL/T29.3.26. further improve the slow running of the magneto, or at any rate make amends for any loss of slow speed performance in the retarded position due to making the break later, and… | ||
| Scan484 | Continued discussion on magneto and distributor performance, timing, and specifications. | ||
| View original record | EFCL/T29.3.26. -6- Contd. satisfactory slow speed performance, on the top of which they have the further advantage that the sleeves may be utilised so as to give their biggest flux effect in the… | ||