Rolls-Royce Archives
| Identifier | Entry | ||
| scan0001 | Suitability and comparison of Lucas, Watford, and Robert Bosch magnetos for various engine models. | ||
| View original record | To EY. )from R. EFC.) X7791 R6/M2.11.26. RE MAGNETOS. LUCAS, WATFORD, ETC. X.8793. X.7791. We fear to fit Lucas magnetos because they have such a bad reputation, whereas Watfords are considered the… | ||
| scan0002 | Acquisition of magnetos from Messrs. Norths for examination and testing. | ||
| View original record | To EY. from EFC. c. to Wd. X7791 EFC1/LG3.11.26. LUCAS AND WATFORD MAGNETOS. X7791 X8793 With reference to R6/M2.11.26. and particularly to the second and fifth paragraphs, though we had urged Messrs.… | ||
| scan0003 | Design and advance mechanisms of Watford and Lucas magnetos. | ||
| View original record | EEC. Wd. BY3/H5.11.26. WATFORD MAGNETOS. X.7791. X.8796. Referring to EFCl/LG3.11.26 and the information in R6/M2.11.26, the position in regard to magnetos is as follows :- 1. The Watford Company are… | ||
| scan0004 | Outlining proposed design changes for the Phantom and 20 HP Magnetos. | ||
| View original record | HS) To EFC)FROM R. BY ) c. to BJ. X7791 RL/M10.12.26. PHANTOM MAGNETO. X.7791. Mr. North promises a more silent magneto, and one which affects the control less. There is to be - No magnetic effect,… | ||
| scan0005 | Chasing the delivery of sleeveless magneto samples from Watford for the 20 HP and 40/50 models. | ||
| View original record | Driver: Remarks on the running generally X7791 Extract from RL/M9.1.27. X.7791 X.8530 IGNITION - BATTERY & MAGNETO CONTACT BREAKER- CLOCK. X.4041. I understand we are asking for a sleeveless magneto… | ||
| scan0006 | Magnetos for 40/50 and 20 HP models, comparing Watford Co. with Lucas. | ||
| View original record | To HS BY. )FROM R. CONFIDENTIAL. EFC.E. )At Le Canadel. copy to BJ. WOR. X7791 R4/M23.1.27. DESPATCHED FROM WW. 27.1.27. MAGNETOS FOR 40/50. AND 20 HP. X8796 I was discussing the above with Mr. North,… | ||
| scan0007 | Requesting an update on the progress and latest design of the Watford sleeveless magneto. | ||
| View original record | To Wd. from EFC. X7791 EFC4/T31.1.27. WATFORD SLEEVELESS MAGNETO. We send you copy of a note received from R. We should like at this stage to have information as to the progress Messrs. North are… | ||
| scan0008 | Supplier's response regarding the design and materials for a Watford sleeveless magneto. | ||
| View original record | EFC. from Wd. V7781 Wd.absent. Hs Wd/1/NJ9.2.27 RECEIVED FEB 9 1927 Watford Sleeveless Magneto. Upon receipt of yours EFC4/T31.1.27 we wrote Sons Ltd. and repeated R's remarks. We are now in receipt… | ||
| scan0009 | The supply and design of sleeveless magnetos and clocks from Messrs Norths. | ||
| View original record | R. C. EFC. BY4/H. 22.2.27. 2 RECEIVED SEP 23 1927 x7791 SLEEVELESS MAGNETOS. CLOCKS. X7791 X85-30 X5790 In reply to R1/M.9.2.27. where you ask me to ascertain what is the earliest delivery of the… | ||
| scan0010 | Selection criteria for magnetos on a 20 HP non-sleeve type engine. | ||
| View original record | To EY. from R. (At Le Canadel) c. to BJ. EFC. Hs E. X7791 R5/M26.2.27. REC'D&DESPATCHED FROMWW. 1.3.27 RE 20 HP. MAGNETOS & NON SLEEVE TYPE. X.7791 X.8790 X.5790 EFC. should say if we can have other… | ||
| scan0011 | The suitability of a sleeve-type magneto for the 20 HP chassis, comparing its performance with other ignition systems. | ||
| View original record | To R. From EFC. c. BJ. c. ECF. Ry. c. Ds. Rg. c. Wd. X7791 EFC5/TB.3.27. 20 HP. CHASSIS MAGNETO. Is there good reason for departing from the sleeve type of magneto in the case of the 20 HP. chassis ?… | ||
| scan0012 | Comparison of magneto performance, contrasting sleeve-type and rotating armature machines for engine ignition systems. | ||
| View original record | -2- Contd. there is less unwanted energy than in the case of the rotating armature machine where we must have a good deal of unwanted energy at the high speeds in order to obtain a good slow speed… | ||
| scan0013 | Sleeve position changes on engine R.O.1, its effect on noise, and an opinion on magneto suppliers. | ||
| View original record | -3- Contd. (Text from offset printing) PERFORMANCE WITH THE PROVISIONAL INSPECTION DEPT. FOR CHIEF INSPECTOR OF ENGINES A change of sleeve position in relation to the internal time functioning might… | ||
| scan0014 | Cover letter accompanying a diagram for the Watford Sleeveless Magneto for the 40/50 HP chassis. | ||
| View original record | X7291 EFC.from Wd. Wd10/NJ4.3.27. Watford Sleeveless Magneto. I confirm mine Wd1/NJ9.2.27. Herewith I send you diagram which Mr.North has handed to me showing where they have got with the sleeveless… | ||
| scan0015 | Rattling fault in the Watford Sleeve Magneto Type EC6 and experiments with alternatives. | ||
| View original record | To CWB. from EFC. c.c. EP. X7791 EFC1/T14.3.27. RE WATFORD SLEEVE MAGNETO TYPE EC6. X8796 Referring to your memo CWB4/GM.11.3.27. The fault of which you mention is one which we are endeavouring to… | ||
| scan0016 | Sourcing and specifications of magnetos for Phantom and other HP models. | ||
| View original record | DA/EV.) To BY. } FROM R. EFC. } Le Canadel. c.c. to BJ. Wor. E. Mr. North. X7791 RL/M15.4.27. REC'D DURING EASTER. AND DESPATCHED 20.4.27. MAGNETOS- 40/50 & 20 HP. X.5790. X.7791. I believe I have… | ||
| scan0017 | Letter discussing magneto requirements and specifications for Phantom and 20 HP car models. | ||
| View original record | X7791 c. to BJ. c. to C. c. to EY. c. to EFG. "ELMSTEAD" WEST WITTERING, CHICHESTER. 26th April, 1927. Mr. R.B. North, at Messrs. North & Sons Ltd., Whippendell Road, WATFORD. Dear Mr. North, MAGNETOS… | ||
| scan0018 | Page 2 of a letter signed by F.H. Royce, requesting new prices and adding a note about a magneto. | ||
| View original record | -2- What can we hope to get at an early date. New prices required. Yours sincerely, (sgd) F.H. Royce. * This magneto should not burn a jump spark distributor. | ||
| scan0019 | Form recording the design and performance details of a magneto on test. | ||
| View original record | X7791 W X.430. FORM OF RECORDING DETAILS OF MAGNETO DESIGN AND PERFORMANCE. Date:- 26-5-27 Magneto on test :- Maker :- Watford. X. No :- 7791 Type :- E06 (Sleeveless). No :- 98201 (1) Weight in pounds… | ||
| scan0020 | Specification sheet for contact breaker timing and automatic advance characteristics. | ||
| View original record | -2- W (4) Primary point gap :- .012" Contact breaker timing :- | | Make | Break | |---|---|---| | A | -27° | 96.5° | | R | 23° | 147° | | | Retard | Advance | |---|---|---| | Make | 23.5° | -28.5° | |… | ||
| scan0021 | Table of distributor dimensions with relative and absolute values, noting that segment length figures are an average. | ||
| View original record | -2a- Distributor dimensions. W x Relative. | Absolute(inches) Pitch (P) = 1.000 | 1.260 Make ratio (M) = .690 | .868 Range (R) = .280 | .353 Forward overlap at full advance (Fa) = .126 | .158 Forward… | ||
| scan0022 | Test report on endurance, circuit tests, and volt-speed curve performance. | ||
| View original record | -3- Contd. W (6) Endurance test :- OK. Bakelite distributor gear wheel has high spot causing rather uneven meshing. (7) Short ~~endurance~~ circuit test :- OK. (8) Open circuit test :- OK. uneven… | ||
| scan0023 | Test results showing a closed circuit primary ampere-speed curve and sparking characteristics. | ||
| View original record | -4- Contd. W (10) Closed circuit primary ampere-speed curve. Speed. Amperes. Speed. Amperes. 200 .93 1200 1.79 300 1.23 1600 1.83 400 1.42 2000 1.85 600 1.61 2400 1.87 800 1.70 2800 1.88 1000 1.76… | ||
| scan0024 | Test results for contact breaker timing and primary point gap settings. | ||
| View original record | -5- W (14) Secondary milliamps :- Maximum :- 11.0 Minimum :- 5.3. (15) Primary point gap after previous tests :- .012". Primary point gap .016". Contact breaker timing. | | Make. | Break. |… | ||
| scan0025 | Test report observations on machine silence and tangential force on a cam lever. | ||
| View original record | -6- (16) Remarks re silence of operation :- Very quiet machine. Slight contact breaker noise noticeable. (17) Tangential force to advance cam lever:- 1.0 lb wt. | ||
| scan0026 | Preliminary report on a new sleeveless Watford magneto, model No 98201. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.F.b. Order No. WC 20 Customer's No. X.7791 New sleeveless Watford magneto No 98201. Preliminary report. We have now received from BY a sample magneto as above for… | ||
| scan0027 | Instructions outlining design improvements and further testing required for a magneto. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (2) To__________________19__ Order No. WC20. Customer's No._____________ the pole tips being only about .150". 2) Bakelite… | ||
| scan0028 | Instruction sheet detailing the failure of a Watford sleeveless magneto during electrical tests. | ||
| View original record | RR 238 (150 BKS.) (DB 451-8-12-24) MP 306975 X7791 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.7.b. Order No. WC22 Customer's No. X7791 Date 31 - 5 - 1927 Watford sleeveless magneto No 98201. Electrical tests… | ||
| scan0029 | Instruction sheet discussing magneto testing and the selection of a suitable chassis for further tests. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 ROLLS-ROYCE, LTD. INSTRUCTIONS. (2) To____________________ 19__ Order No._________________ Customer's No.__________________ speed is also low and below our… | ||
| scan0030 | Letter detailing the bench test results and specification failures of a new sleeveless type magneto from North & Sons, Ltd. | ||
| View original record | c. BY c. Mailing. X7791 EFC7/T. 10th June, 1927. Messrs. North & Sons, Ltd., Whippendell Road, Watford. Dear Sirs, We have now made complete bench tests of the new sleeveless type magneto No.98201… | ||
| scan0031 | The concluding page of a typed letter. | ||
| View original record | -2- Contd. we feel sure you have a copy. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||
| scan0032 | The trial of a Sleeveless Watford Magneto and a Lucas type ER6 magneto on a test chassis. | ||
| View original record | To Mx. from EFC. c. BY. X7791 EFC6/T10.6.27. X.7791 - SLEEVELESS WATFORD MAGNETO. X.8793. LUCAS TYPE ER6. Herewith we hand to you the latest Watford sleeveless magneto, together with the most… | ||
| scan0033 | The inspection and testing of new sleeveless Watford and up-to-date Lucas ER6 magnetos. | ||
| View original record | To R. from EFC. c. BJ. E. c. Da. Wor. c. BY. Mx. c. EP. RG. X7791 (EFC. absent) EFCl/T13.6.27. ++ Dict. 11.6.27). X.430. MAGNETOS. X8790 NEW SLEEVELESS TYPE WATFORD MAGNETO NO.98201. V7791 UP-TO-DATE… | ||
| scan0034 | Comparison and examination of modifications and specifications for Lucas and Watford magnetos. | ||
| View original record | -2- Contd. (3) Longer contact breaker cams like those of the new RO1 magneto. (4) Considerably easier moving cam ring - a distinct improvement. Lucas type ER6 magneto. From a preliminary examination,… | ||
| scan0035 | Comparison of distributor specifications for Watford and Lucas models, detailing ranges, timing, and dimensions. | ||
| View original record | -3- Contd. EFC1/T13.6.27. The ranges as set by the makers were found to be :- Watford 50° Lucas 60° N.B. Our General Specification asked for "not less than 50° if possible". R., in his note to Mr.… | ||
| scan0036 | Comparative table of relative distributor dimensions for Watford and Lucas models. | ||
| View original record | -4- Contd. Relative distributor dimensions. Watford. | Lucas (jump spark) | Lucas (Wipe contact) | Suggested relative dimensions. Pitch (P) 1.000 | 1.000 | 1.000 | 1.000 Make ratio (M) .690 | .575 |… | ||
| scan0037 | Endurance, short circuit, and open circuit tests comparing Watford and Lucas magnetos. | ||
| View original record | -5- Contd. (6) In an endurance test carried out on the two magnetos, in which they were run for 7 hours each at a speed of 2000 r.p.m. with timing lever fully advanced, sparking being caused to take… | ||
| scan0038 | Comparative performance analysis of Lucas and Watford magnetos, including open/short circuit and utility spark gap tests. | ||
| View original record | -6- Contd. (9) & (10) The open circuit volt-speed curve and the short circuit ampere-speed curve of the primary windings of these two machines have been observed, making use of suitable A.C.… | ||
| scan0039 | Performance comparison test report on Watford and Lucas magnetos. | ||
| View original record | -7- Contd. the central position from 900 to 4000 r.p.m. but and in the advanced position it was incapable of firing the gap. N.B. It had been previously arrived at that the amount of leak on this test… | ||
| scan0040 | Continued report comparing performance characteristics and specifications of Watford and Lucas magnetos. | ||
| View original record | -8- Contd. Our General Specification speed for the fully retarded position is 190 r.p.m. so that this is just missed by the Lucas machine, though previous machines we have had have satisfied the… | ||
| scan0041 | Comparison between the Watford sleeveless type magneto and the Lucas type ER6 magneto. | ||
| View original record | -9- Contd. General remarks re comparison of Watford sleeveless type magneto and Lucas type ER6 magneto. It would appear that the Lucas is the more normally arranged of the two machines electrically,… | ||
| scan0042 | Comparative testing of magnetos from different makers. | ||
| View original record | -10- Contd. sparking figure to be 190 r.p.m. which, though not yet quite as low as the Watford, is a more reasonable figure for comparison. We are taking up with the makers the reason as to why this… | ||
| scan0043 | Graph of open circuit volt-speed and short circuit ampere-speed curves for Watford and Lucas magnetos. | ||
| View original record | O.C. VOLTS S.C. AMPERES LUCAS Nº 53 WATFORD Nº 98201 VOLTS AMPERES OPEN CIRCUIT VOLT-SPEED AND SHORT CIRCUIT AMPERE-SPEED CURVES OF PRIMARY WINDINGS OF WATFORD E06 (SLEEVELESS) AND LUCAS ERG MAGNETOS.… | ||
| scan0044 | Test report on a Sleeveless Watford Magneto, detailing various faults including noise, squeaks, and incorrect assembly. | ||
| View original record | EFC X7791 Mx/McM4/T16.6.27. X7791 Sleeveless Watford Magneto EFC6/T10.6.27. We return herewith magneto No.98201. We have completed our tests of this. It has not got the heavy sleeve knock, but the… | ||
| scan0045 | Fitting of a new Watford sleeveless magneto to chassis 10-EX and the return of the old one. | ||
| View original record | To RHC. from EFC/HEW. c. Hs/AJL. EFC/HEW1/T1 7.6.27. X22911 WATFORD SLEEVELESS MAGNETO. Herewith we hand to you a Watford sleeveless magneto, No.98201. Will you kindly have this fitted to chassis… | ||
| scan0046 | Sending a Bosch ignition head and Lucas magneto, and requesting new models from Lucas and Watford. | ||
| View original record | To EFC. from E. X7791 E2/M18.6.27. ELECTRICAL MODELS. We are sending you under separate cover the Bosch battery ignition head, and Lucas magneto, as requested. We are sorry not to have sent them… | ||
| scan0047 | Letter to Messrs. North & Sons, Ltd. about the test results of a sleeveless magneto. | ||
| View original record | Y7791 c. BY. c. Mailing. EFC5/T. 20th June, 1927. Messrs. North & Sons, Ltd., Whippendell Road, WATFORD. Dear Sirs, Sleeveless Magneto. Further to our EFC7/T. of the 10th inst., we have now had this… | ||
| scan0048 | Note detailing the fitting of a Watford Sleeveless Magneto to chassis 10.EX. | ||
| View original record | To Hs. from RHC. C AH. X7791+ RHC11/BE. 21.6.27. 10.EX. CHASSIS X. Watford Magneto Watford Sleeveless Magneto No.98201, fitted in place of Magneto No.94201, in accordance with EFC/HEW1/T. 17.6.27.… | ||
| scan0049 | Letter from North & Sons, Ltd. concerning modifications to a sleeveless magneto due to noise issues. | ||
| View original record | V2791 THE BRITISH MADE Watford SPEEDOMETERS MAGNETOS. NORTH & SONS, LTD. WHIPPENDALL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON.… | ||
| scan0050 | Chasing a report on comparison tests between Lucas and Watford magnetos. | ||
| View original record | To Mx. from EFC. X77 91 EFC3/T24.6.27. WATFORD MAGNETO - SLEEVELESS TYPE. We are anxiously awaiting your report on the comparison tests of the Lucas type ER6 magneto No.53 and the Watford sleeveless… | ||
| scan0051 | The availability of Watford Sleeveless and Lucas magnetos for inspection. | ||
| View original record | To E. from EEC. X7791 EFC2/T29.6.27. X.7791. WATFORD SLEEVELESS MAGNETO. X.8793. Lucas MAGNETO. Reference your E2/M18.6.27, we have not at the moment either one of the latest Lucas magnetos or the new… | ||
| scan0052 | Letter to Messrs. North & Sons, Ltd. concerning a sleeveless magneto and modifications requested by Mr. Royce. | ||
| View original record | V5291 EFCL/T. 29th June, 1927. Messrs. North & Sons, Ltd., Whippendell Road, WATFORD. Dear Sirs, We thank you for yours CHK/HC.11. of the 23rd. inst. concerning sleeveless magneto No.98201. We regret… | ||
| scan0053 | Performance characteristic graph for a Watford 55% Armature, plotting degrees retard against RPM. | ||
| View original record | WATFORD. 55% Armature Length 2.046" DEGREES RETARD F.A. R.P.M. 5.5 mm 3 pt gap. 28+22 RELIEVED DIA 2.315 (S) Rad 16 7/8" (S) 2.305 12.30 FINAL RESULTS WILL COME WITHIN SHADED SECTION. Dec 29. '26.… | ||
| scan0054 | Confirming a change from ball distributor bearings to plain distributor bearings for Watford sleeveless magnetos. | ||
| View original record | X7791 5.7.27. WATFORD SLEEVELESS MAGNETO. It has been arranged, in conversation with Mr. Allen of Messrs. North's, today, that further sleeveless magnetos received by us will have plain distributor… | ||
| scan0055 | Letter from North & Sons, Ltd. confirming a visit to present a new sample magneto for approval. | ||
| View original record | X7741 SPEEDOMETERS The BRITISH MADE Watford & MAGNETOS. NORTH & SONS, LTD. WHIPDENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE… | ||
| scan0056 | The swapping of a Lucas and a Watford magneto between cars 9-EX and 10-EX. | ||
| View original record | EFC. X 7791 9.8.27. X8743 We have changed the Lucas magneto fitted to 9-EX. to 10-EX. The Watford sleeveless magneto (No.98201) which was fitted to 10-EX has been fitted to 9-EX. We have made this… | ||
| scan0057 | Visit from Mr. North discussing the selection and issues concerning magnetos for cars and aero engines. | ||
| View original record | BJ. HS.) FROM R. RC. RY.) [text struck through] C- to WOR. EFC. [text struck through] X7791 VISIT TO WW. BY MR. NORTH CONCERNING MAGNETOS. R1/M19.8.27. X8790 On the 17th inst. Mr. North called… | ||
| scan0058 | Sourcing of Swiss aero engine magnetos to benchmark against and stimulate development of English models. | ||
| View original record | (2) of the Air Ministry's machines from our Stores so that they can be put right and available for test. I am aware that this machine has not yet passed a type test, but I think this has been largely… | ||
| scan0059 | Modifications and performance comparisons of chassis magnetos. | ||
| View original record | To R. from EFC. c. BJ. E. c. EY. Wor. awts X 7791 EFC5/T23.8.27. CHASSIS MAGNETOS. X.8793 X7791 Your reference RL/M19.8.27. We have recently received a second sleeveless magneto, No.99171 . There are… | ||
| scan0060 | Letter from North & Sons, Ltd. regarding magneto test results and delivery. | ||
| View original record | X 7291 THE BRITISH MADE Watford SPEEDOMETERS & MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. CONTRACTORS TO THE ADMIRALTY, WAR… | ||
| scan0061 | Form recording the design and performance details of a magneto on test. | ||
| View original record | X.7791 X.430. FORM OF RECORDING DETAILS OF MAGNETO DESIGN AND PERFORMANCE. Date:- 23-8-27. Magneto on test:- Maker :- Watford. X.No. :- 7791 Type :- EW6 No :- 99171 (1) Weight in pounds :- 12.875. (2)… | ||
| scan0062 | Specification sheet for primary point gap, contact breaker timing, and automatic advance characteristics. | ||
| View original record | -2- (4) Primary point gap :- .010" Contact breaker timing :- | | Make. | Break. | |---|---|---| | A | -8º | 92.5º | | R | 51º | 151.5º | Range :- 59º | | Retard. | Advance. | |---|---|---| | Make. |… | ||
| scan0063 | Table detailing distributor dimensions in both relative and absolute (inches) values. | ||
| View original record | -3- Distributor dimensions. Relative. | Absolute(inches) Pitch (P) = 1.000 | 1.26 Make ratio (M) = .558 | .705 Range (R) = .328 | .413 Forward overlap at full advance (Fa) = .050 | .060 Forward… | ||
| scan0064 | Test results for endurance, short circuit, open circuit, and an open circuit primary volt-speed curve. | ||
| View original record | -4- Contd. (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 2.73 .0068 800 4.76 .0060 1200… | ||
| scan0065 | Test report continuation page detailing closed circuit primary ampere-speed curve, speed range, and sparking characteristics. | ||
| View original record | -5- Contd. (10) Closed circuit primary ampere-speed curve. Speed. Amperes. Speed. Amperes. 100 .72 1600 2.60 200 1.12 2000 2.68 300 1.51 2400 2.72 400 1.81 2800 2.74 600 2.12 3200 2.75 800 2.32 3400… | ||
| scan0066 | Test results and data for contact breaker timing and primary point gap settings. | ||
| View original record | -6- (14) Secondary milliamps :- Maximum :- 18.5 Minimum :- 5.7 (15) Primary point gap after previous tests :- .010" Primary point gap .006" Contact breaker timing. | | Make. | Break. | |---|---|---| |… | ||
| scan0067 | Notes on magneto operation noise, identifying the 'make and break' as the noisiest component, and a tangential force measurement. | ||
| View original record | -7- (16) Remarks re silence of operation. Quiet magneto, the noisiest component being the make and break. (17) Tangential force = 2 lbs wt. EFC. | ||
| scan0068 | Refusal to use Lucas magnetos due to their poor reputation and considering other supplier brands. | ||
| View original record | DJ. WOR. } DY. EFC. } FROM R. HS. ROY. } SS. x7791 re. MAGNETOS ETC. R1/M27.8.27. X8793 X7791 I am sorry I cannot make ROY. understand that it is not a question of quality or price, but the current… | ||
| scan0069 | New sleeveless magneto from the Watford Magneto Company, comparing costs and testing. | ||
| View original record | W/S. DJ. from ROY. c. to Lov. c. to RM c. to He c. to HFC c. to Sg. X7791 ROY4/MG29.8.27 -----------MAGNETOS----------- Mr. North, of the Watford Magneto Company, was here on Friday (26th) and left… | ||
| scan0070 | Performance of new Watford chassis magnetos and comparing them with competitors M.L. and B.T.H. | ||
| View original record | To R. from EFC. c. BJ. BY. c. Wor. RG. ewB X 7791 EFC4/T29.8.27. CHASSIS MAGNETOS. X.7791 X8790 Your ref. RL/M27.8.28. The new Watford sleeveless magnetos are shewing good promise. The two which we… | ||
| scan0071 | Comparison and testing of various magnetos including Watford, Lucas, Robert Bosch, and Scintilla. | ||
| View original record | Contd. -2- EFC4/T29.8.27. view of the fact that we did not consider these magnetos very good in other respects (magneto appeared of a poor type) we did not take the matter any further. From a purely… | ||
| scan0072 | Test report on the performance of a Watford EW6 magneto, comparing it to a Lucas model. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12 24) MP 306975 X7791 ROLLS-ROYCE LTD. INSTRUCTIONS. To. E.7.b Order No. WC32 Customer's No. X7791 30 - 8 - 1927 Watford EW6 magneto No 99171. We have now tested this… | ||
| scan0073 | The exceptional performance and reliability of two magnetos following testing. | ||
| View original record | RR 238 (150 BKS.) (DB 451-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. Customer's No. performance is better. The high speed performance too is exceptionally good. We consider this… | ||
| scan0074 | The replacement of Watford magnetos on chassis 12-EX and 9-EX. | ||
| View original record | X7791 To HHC. from EFC. c. Hs/AJL. EFC5/T30.8.27. WATFORD SLEEVELESS MAGNETO. Herewith we hand to you Watford sleeveless magneto No.99171, type EW.6. Will you please have this put on 12-EX replacing… | ||
| scan0075 | Form recording the design and performance details of a magneto on test. | ||
| View original record | X7791 X.430. FORM OF RECORDING DETAILS OF MAGNETO DESIGN AND PERFORMANCE. Date :- 3-9-27 Magneto on test:- Maker :- Watford X.No. :- 7791 Type :- EW6 No :- 99802 (1) Weight in pounds :- 12.90 (2)… | ||
| scan0076 | Specifications for primary point gap, contact breaker timing, and automatic advance characteristics. | ||
| View original record | -2- (4) Primary point gap :- .010" Contact breaker timing :- Retard. Advance. Make. 57° -3° Break. 157° 96° Make. 238° 177° Break. 338° 278° Make. Break. A -3° 97° R 57.5° 157.5° Range :- 60.5° Make… | ||
| scan0077 | Table of distributor dimensions listing relative and absolute values in inches. | ||
| View original record | -3- Distributor dimensions. Relative. | Absolute(inches) Pitch (P) = | 1.000 | 1.26 Make ratio (M) = | .556 | .700 Range (R) = | .336 | .423 Forward overlap at full advance (Fa) = | .060 | .075… | ||
| scan0078 | Test results for endurance, short circuit, open circuit, and an open circuit primary volt-speed curve. | ||
| View original record | Contd. (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 2.42 .00605 800 4.65 .00582 1200… | ||
| scan0079 | Test results for a closed circuit primary ampere-speed curve, speed range and sparking characteristics. | ||
| View original record | -5- Contd. (10) Closed circuit primary ampere-speed curve. Speed. Amperes. Speed. Amperes. 100 .72 1600 2.63 200 1.25 2000 2.68 300 1.60 2400 2.72 400 1.93 2800 2.75 600 2.20 3200 2.77 800 2.36 3400… | ||
| scan0080 | Test results for secondary milliamps, primary point gap, and contact breaker timing. | ||
| View original record | -6- (14) Secondary milliamps :- Maximum :- 20.0 Minimum :- 5.7 (15) Primary point gap after previous tests :- .010" Primary point gap .014" Contact breaker timing. Make. Break. Retard. Advance. A -2°… | ||
| scan0081 | Notes on magneto operation silence and tangential force measurements. | ||
| View original record | -7- (16) Remarks re silence of operation. Very quiet magneto. (17) Tangential force = 1 1/2 lbs wt. EFC. | ||
| scan0082 | Pricing for magnetos and pricing/design considerations for dashboard clocks and instruments. | ||
| View original record | To SG. from R. c. to Mr. North. c. to BJ. HS. BY. DA/EV. x7791 R8/M5.9.27. RE MAGNETOS. X.4662a. X.7791. I feel satisfied that we have got the correct machine at the correct price. It will be… | ||
| scan0083 | Requesting a trial of a Watford sleeveless magneto on test cars for potential cost reduction. | ||
| View original record | To Mx. from EFC. X7791 EFC2/T6.9.27 WATFORD SLEEVELESS MAGNETO. Herewith we send you Watford sleeveless magneto type EW6 No.99802. We think you will find this machine very good - for detailed… | ||
| scan0084 | The testing of new 'Watford' magnetos as a potential cost-saving replacement for the current standard model. | ||
| View original record | X7791 BY. from ROY. c. to Hs. e. to EFC MAGNETOS Would you kindly advise if tests with the "Watford" Sleeveless Type Magnetos Nos. 99171 and 99802 submitted on the 3rd and 26th ultimo respectively… | ||
| scan0085 | The electrical bench testing of non-sleeve type Watford magnetos. | ||
| View original record | To Roy. from EFC. X2791 EFC5/T6.9.27. NON-SLEEVE TYPE WATFORD MAGNETO. Herewith we hand to you Watford sleeveless magneto No.98201 type EW6, this being the first machine received, and sent to us only… | ||
| scan0086 | Test results and performance graph for a Watford Magneto Type EW6. | ||
| View original record | DRG No.- 638-1 WATFORD MAGNETO Type EW6 Extended POLE SHOES 60° A-R TESTS ON FINISHED MAGNETO Mag No.- 99802 After endurance run at 3,500 RPM Graph: Y-Axis: Degrees retard X-Axis: Speeds. Graph… | ||
| scan0087 | Comparative test report on the performance of Watford and Lucas magnetos at various speeds. | ||
| View original record | For Mr. Clarke Tests on two Magnetos | MAGNETO | Low speed | High Speed | High speed with leak | |---|---|---|---| | | A | 30° | 60° | A | R | A | R | | WATFORD E.H.6. | 45 | 90 | 120 | 5,000 | 5,000… | ||
| scan0088 | Offer from Messrs. North & Sons for a modified E.W.6 Magneto. | ||
| View original record | X7791 EFC. from ROY. c. to Hs. ROY25/MG7.9.27 MAGNETOS Following our conversation on Monday (5th) Messrs. North & Sons have submitted an offer to supply a modified E.W.6 Magneto with a simpler form of… | ||
| scan0089 | Specifications and differences of new sleeveless Watford magnetos, models 99171 and 99802. | ||
| View original record | X7791 To R. from EFC. c. BJ. E. c. Wor. BY. Mx. cub NEW SLEEVELESS WATFORD MAGNETO. (2nd.& 3rd. Machines Nos.99171 & 99802) Further to EFC1/T13.6.27 and EFC5/T23.8.27, we received a third and further… | ||
| scan0090 | Magneto performance tests, detailing sparking, circuit characteristics, and comparisons. | ||
| View original record | Contd. -2- EFCL/T7.9.27. Range 60°, hence make retarded 55° after position of maximum flux. Period of make 100°. Break advanced 95° after position of maximum flux, and break retarded 155° after… | ||
| scan0091 | The performance, silence, and cost-effectiveness of new machines, likely magnetos, compared to standard sleeve types. | ||
| View original record | -3- Contd. Apparently they have not adopted our suggestion of making the cam very much easier at the make in order to let the points make more gently and avoid bouncing and arcing. Silence. These… | ||
| scan0092 | Letter discussing bench test results and potential modifications for sleeveless magnetos to reduce noise. | ||
| View original record | c. Roy. c. EY. c. Mailing. CWB X7791 EFC4/T. 8th Sept., 1927. Messrs. North & Sons Ltd., Whippendell Road, Watford. For the attention of Mr. R.B. North. Dear Sirs, We have completed preliminary bench… | ||
| scan0093 | Letter discussing preliminary chassis tests and the subsequent decision on magnetos. | ||
| View original record | -2- Contd. We shall probably write you further when the preliminary tests on the chassis have been completed. We shall then have to decide whether we consider the magnetos sufficiently good to go on… | ||
| scan0094 | Test report on a Watford Sleeveless Magneto, No.99802, which developed a knocking noise but functioned well as a sparking machine. | ||
| View original record | EFC. from Mx. X7791 Mx10/T9.9.27 Watford Sleeveless Magneto. EFC2/T6.9.27. The magneto you handed to us for test type EW.6. No.99802 developed a pronounced knocking noise in the course of a run of… | ||
| scan0095 | Faults found during the testing of Watford sleeveless magnetos. | ||
| View original record | To Roy. from Hs. c. to Wor. c. to BY. c. to BJ. X7791 Hs1/LG9.9.27. WATFORD SLEEVELESS MAGNETO. We have 2 of the Watford sleeveless magnetos on test. One has been condemned for a knock which comes… | ||
| scan0096 | Offer from Messrs. North & Sons for a modified E.W.6 Magneto. | ||
| View original record | X7791 EFC. from ROY. c.c. to Hs. ROY25/MG7.9.27 ---------- MAGNETOS Following our conversation on Monday (5th) Messrs. North & Sons have submitted an offer to supply a modified E.W.6 Magneto with a… | ||
| scan0097 | Returning a faulty magneto, No. 99802, for correction due to a knocking noise. | ||
| View original record | To Roy. from EFC. X7291 EFC2/T10.9.27. WATFORD TYPE EW6 MAGNETO No.99802. Herewith we hand to you the above magneto which we desire to have returned to Messrs. North & Sons for correction, our Test… | ||
| scan0098 | Unsatisfactory performance of new sleeveless Watford magnetos and a proposal for a cheaper, modified version. | ||
| View original record | To R. from EFC. c. BJ. c. Wor. BY. X7791 EFC3/T10.9.27. NEW SLEEVELESS WATFORD MAGNETOS. 2nd. & 3rd. Machines Nos.99171 & 99802. Further to our EFC1/T7.9.27, these machines have not turned out very… | ||
| scan0099 | Price comparison of different magneto types for the 40/50 HP chassis. | ||
| View original record | Contd. -2- EFC3/Y10.9.27. "40/50 HP. Chassis Magnetos. Watford present standard EO6 (i.e. sleeve type) £11. 0. 0d. Proposed Watford EW6 (i.e. sleeveless) £ 7.16. 0d. Scintilla type GN6. £ 8.10. 0d.… | ||
| scan0100 | Letter detailing the results of preliminary tests on two type EW6 sleeveless magnetos. | ||
| View original record | EFCl/T. 10th September 1927. Messrs. North & Sons, Ltd., Whippendell Road, Watford. Dear Sirs, For the attention of Mr. R.E.North. Further to our letter ref. EFC4/T. of the 8th inst., we are writing… | ||
| scan0101 | Test report on a magneto that developed a knocking noise during a 40-mile run. | ||
| View original record | -2- Contd. So far as we can gather there is no complaint concerning the contact breaker of this machine. The report we have received from the Test Dept. runs as follows :- "The magneto you handed to… | ||
| scan0102 | Test results and feedback on the EW6 Sleeveless Type of Watford Magneto. | ||
| View original record | To R. from Hs/GWH. c. BJ.Wor. c. E.Da. c. By. RE EW6. SLEEVELESS TYPE OF WATFORD MAGNETO. 99171 The results of our tests with this magneto on 9Ex are - the slow running is good, no misfires at a speed… | ||
| scan0103 | Letter from North & Sons, Ltd. acknowledging receipt of two letters for the attention of Mr. E. Fowler-Clark. | ||
| View original record | V7791 THE BRITISH MADE Watford SPEEDOMETERS & MAGNETOS. NORTH & SONS, LTD. WHIPPENDENLL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON.… | ||
| scan0104 | Performance and faults of the Watford Sleeveless EW.6 magneto and the potential for a production order. | ||
| View original record | HS. FROM R. C. to BJ. EY. FEG. Mr. NORTH. X7791 MAGNETOS - WATFORD SLEEVELESS TYPE - EW.6. R2/M12.9.27. X7791 This appears to be quite right when production is settled: the price also is passable for… | ||
| scan0105 | Comparison of Watford Sleeveless magnetos against Lucas and other brands. | ||
| View original record | X7791 To ROY. from EFC EFC1/T13.9.27. WATFORD SLEEVELESS MAGNETOS. The suggestion referred to in your ROY25/MG7.9.27, arose during the interview between R. and Mr. North at W.W. It is referred to in… | ||
| scan0106 | The return of Watford magnetos from Messrs. Norths. | ||
| View original record | To Roy. from EFC. X7791 EFC2/T6.10.27. WATFORD MAGNETOS. We are awaiting the return from Messrs. Norths of firstly, the Watford sleeveless type chassis magneto, No.99802, about which we wrote them in… | ||
| scan0107 | Letter from North & Sons, Ltd. proposing a visit to discuss modifications to a magneto. | ||
| View original record | X7791 SPEEDOMETERS & MAGNETOS. THE BRITISH MADE Watford NORTH & SONS, LTD. WHIPPENDEL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON… | ||
| scan0108 | Confirming the handover of a Watford sleeveless magneto, part number 99802. | ||
| View original record | X7791 31.10.27. Mr. North has to-dayé handed to us Watford sleeveless magneto (L.H) No.99802. EFC. | ||
| scan0109 | Urgent request for a tester's report on an EW.6 magneto following a faulty replacement, to enable a requisition for six more units. | ||
| View original record | X7791 To Hs/AJL. from EFC. EFC5/T1.11.27. WATFORD SLEEVELESS MAGNETOS. 99802 on We would like to have as soon as possible your tester's report on the EW.6. magneto, No.99171 from 9-EX, which we… | ||
| scan0110 | Tests and modifications for knocking noise in Watford EW6 magnetos. | ||
| View original record | To R. from EFC. c. BJ. Da. c. E. Wor. CWB c. Bv. EP. X7791 EFC4/T2.11.27. WATFORD SLEEVELESS MAGNETO TYPE EW6. Further to our report EFC3/T10.9.27, to which we attached copy of our letter… | ||
| scan0111 | Performance and noise tests of a Watford Sleeveless Magneto Type EW6. | ||
| View original record | To R. from EFC. c. BJ. E. c. Da. Ey. CWS c. Wor. EP. X7791 EFC10/T7.11.27. WATFORD SLEEVELESS MAGNETO TYPE EW6. Further to our EFC4/T2.11.27, we have now received the tester's report referred to, the… | ||
| scan0112 | Continued memorandum discussing machine improvements, noise reduction, and standardisation. | ||
| View original record | Contd. -2- EFC/C/T7.11.27. all conditions of our specification. (E) Reduction of force to operate advante and retard lever and elimination of the alternating impulses which affect the controls.… | ||
| scan0113 | Requesting an order be placed with North & Sons Ltd. for new sleeveless Watford magnetos for testing. | ||
| View original record | ROY. c. BY/CS. c. HS. c. Mx. X7791 BY2/G.8.11.27. RECEIVED NOV 1927 SLEEVELESS MAGNETOS. Now that the standardisation sheet is actually being sent round to standardise the new type of Watford magneto,… | ||
| scan0114 | Letter to a supplier regarding the standardization and future supply of magnetos for the Phantom engine. | ||
| View original record | 8th November 1927. BY1/G.8.11.27. Messrs. North & Sons Ltd., Whippendell Road, Watford. Dear Sirs, MAGNETOS. As a result of our experience with the Sleeveless Magneto of which you have supplied us… | ||
| scan0115 | Requesting further information on a standardisation sheet for a new Watford Sleeveless Type EW.6 Magneto. | ||
| View original record | S/W. Hs. x7791 CWB10/GM/11.11.27. Re: Watford Sleeveless Type EW.6 Magneto. With reference to standardisation sheet No. 7791, of 8th November '27, the information given thereon hardly seems sufficient… | ||
| scan0116 | Letter from Messrs. North & Sons regarding a new magneto model and standardization efforts. | ||
| View original record | Hs. ROY. Wor. X7791 BY7/G.11.11.27. [Stamp: NOV 16. 1927] PHANTOM MAGNETOS. X8796 I attach hereto copy of letter received from Messrs. North & Sons, as a result of my writing them pointing out that we… | ||
| scan0117 | Letter from North & Sons Ltd. concerning the supply and production of magnetos. | ||
| View original record | COPY. From:- North & Sons, Ltd. Whippendell Road, Watford. Our Ref. CHK/IT.5. Your Ref. BYL/G.8.11.27. 10th November, 1927. Messrs. Rolls-Royce Ltd., D E R B Y. Dear Sirs, MAGNETOS. We thank you for… | ||
| scan0118 | Production and testing of the sleeveless type Watford Magneto E.W.6, highlighting ongoing issues and a 25% rejection rate. | ||
| View original record | X7791 BY. from ROY. c. to Hs. c. to EFG ---------- ROY1/MG12.11.27 ----------- MAGNETOS Messrs. North & Sons advise that the Tools, Jigs, Gauges etc for production of the sleeveless type Watford… | ||
| scan0119 | The Watford Sleeveless Magneto type EW6. | ||
| View original record | W/S. To CWB. from EFC. X 7791 EFC7/T14.11.27. Watford Sleeveless Magneto type EW6. With reference to your CWB10/GM/11.11.27, herewith we are sending you copies of certain correspondence in connection… | ||
| scan0120 | Performance of existing Sleeveless Type EW6 Watford Magnetos and requesting a new one for a 10,000-mile test. | ||
| View original record | X7791 To Roy. from EFC. c. EH. EFC/T21.11.27. SLEEVELESS TYPE EW6. WATFORD MAGNETO. Referring to EY2/G8.11.27. we should like to know what the prospects are of receiving these magnetos within the next… | ||
| scan0121 | Electrical experimental record sheet for a Watford Sleeveless magneto, number 98201, type EW6. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS X.&No:- 7791 Watford Sleeveless magneto NO 98201 Type EW6 Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles… | ||
| scan0122 | The delivery arrangements for two new Sleeveless Type E.W.6 Watford Magnetos. | ||
| View original record | EFC. from ROY. c. to BY. X7791 ROY5/MG22.11.27 Sleeveless Type E.W.6 Watford Magnetos EFC1/T21.11.27 - The Watford Company have every hope of delivering two further machines within 10 days from date,… | ||
| scan0123 | Requesting a Watford EW6 sleeveless magneto for a 10,000-mile test on a Phantom chassis. | ||
| View original record | To Roy. from EFC. X.7791- EFC3/T25.11.27. WATFORD EW6 MAGNETO. We wish to emphasize the need of obtaining as soon as possible one further type EW6 sleeveless magneto, as we shall shortly be running a… | ||
| scan0124 | Letter to Messrs. North & Sons Ltd. concerning a comparative road test of experimental magneto cams. | ||
| View original record | X 7791 EFC5/T. 30th November, 1927. Messrs. North & Sons Ltd., Whippendell Road, WATFORD. Dear Sirs, We have now had an opportunity of making a comparative test on the road on the noisiness of the… | ||
| scan0125 | Letter discussing a magneto experiment to investigate mechanical noisiness caused by different cams. | ||
| View original record | -2- Contd. to let us have another magneto of this type. We suggest that this magneto should also be fitted with similar cams. We wish to impress upon you that circumstances at the moment are such that… | ||
| scan0126 | Letter from North & Sons, Ltd. regarding the production and delivery schedule for experimental cams for E.W.6. Magnetos. | ||
| View original record | X7791 THE BRITISH MADE Watford SPEEDOMETERS & MAGNETOS. NORTH & SONS, LTD. WHIPPENDALL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON.… | ||
| scan0127 | Letter from North & Sons, Ltd. regarding the production and delivery of experimental cams for magnetos. | ||
| View original record | X7791 THE BRITISH MADE Watford SPEEDOMETERS @MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON.… | ||
| scan0128 | Letter from North & Sons Ltd regarding experiments on cam shapes and their effect on noise in contact breakers. | ||
| View original record | NORTH & SONS LTD AH 2. Continuation Sheet No. 1. With regard to the last paragraph of your letter we beg to say that we have made numerous experiments over a long period in our quiet room with cams of… | ||
| scan0129 | Standardisation of a chassis part, specifically the Watford Sleeveless Type EW6 Magneto. | ||
| View original record | RR 755 REVISED (10H) (DE 649 9-12-26) BM. 2/1187. R/x 7791 COMPLETED 2.12.27 STANDARDISATION of CHASSIS PARTS. Date 8.11.27 Description of Parts. WATFORD SLEEVELESS TYPE EW6 MAGNETO. Origin. To… | ||
| scan0130 | Standardisation form for chassis parts detailing implementation and costs. | ||
| View original record | [Reversed text at top] STANDARDISATION OF CHASSIS PARTS (1) The number of the first chassis on Which the new part will be fitted. When existing stock has been used. (2) Date when the chassis will be… | ||
| scan0131 | The provision of a new Watford EW6 magneto for testing on car 14-EX. | ||
| View original record | To RHC. from EFC. c. Hs/AJL. X7791 EFC7/T8.12.27. WATFORD EW6 MAGNETOS. We now hand to you herewith one of the new (recently received) EW6 magnetos No.100080. As promised, this is for 14-EX. We have… | ||
| scan0132 | The production approval of the new Watford EW.6 magneto and arrangements for its use in the F.2 series. | ||
| View original record | E. Dept. c. ROY. c. HS. X7791 BY1/G.9.12.27. PHANTOM MAGNETO. -------------- Please note that the new type Watford magneto EW.6 has been passed for production by the standardisation sheets being fully… | ||
| scan0133 | Instructions for modifying lubrication for Watford EW6 magnetos. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.F.B. Order No.: WC53 Customer's No.: X7791 Watford EW6 magnetos. In the event of the standardization of the above it will be necessary to modify the lubrication… | ||
| scan0134 | The return of a faulty Watford EW6 magneto for correction. | ||
| View original record | X7791 To Roy. from EFC. c. Despatch Stores. EFC5/T12.12.27. WATFORD EW6 MAGNETO Herewith we hand to the Stores Watford EW6 magneto No.99171. This magneto has developed an armature rub, and we should… | ||
| scan0135 | Letter to North & Sons Ltd. discussing performance issues with various magnetos, including noise, armature rubbing, and cam tests. | ||
| View original record | EFC X7791 Mailing By. EFC3/T. 12th December, 1927. Messrs. North & Sons Ltd., Whippendell Road, Watford. Dear Sirs, We duly received your letter ref. CHK/DEW.10 of the 2nd. inst. We have also now… | ||
| scan0136 | Letter regarding unsatisfactory EW6 magnetos, with a later note about a noisy machine and receipt of a further magneto. | ||
| View original record | Contd. -2- We much regret the fact that of the four EW6 magnetos we have had from you not one of these has been completely satisfactory as compared with what we think possible and desire for standard.… | ||
| scan0137 | Lubrication instructions for Watford Type EW6 magnetos. | ||
| View original record | To BY. from EFC. c. BY/NHW. x 7791 EFC8/T12.12.27. WATFORD TYPE EW6 MAGNETOS. In this connection my assistant reports - "In the event of the adoption for standard of the above, it will be necessary to… | ||
| scan0138 | Investigation into reducing the make and break noise of a Watford EW6 Magneto using modified cams. | ||
| View original record | To R. from EFC. c. BJ. E. c. Da. By. c. Wor. X7791 EFC6/T13.12.27. WATFORD EW6 MAGNETO. We are pursuing the question of reducing the noisiness of the make and break by using modified cams. We have… | ||
| scan0139 | The causes of noise in contact breakers and magnetos, referencing experiments by Messrs. North. | ||
| View original record | Contd. -2- EFC6/T13.12.27. noiziness Messrs. North in a letter to us remarked that they have made numerous experiments over a long period in their quiet room with cams of various shapes, running the… | ||
| scan0140 | Note on a slack contact breaker lever in magnetos and a planned 10,000 mile test. | ||
| View original record | -3- Contd. Another point we have noticed which is the case on the last two magnetos received, is that the contact breaker lever is made quite slack on the pin and we think this may have some effect in… | ||
| scan0141 | Letter to Messrs. North & Sons Ltd. concerning tests and noise issues on an EW6 magneto. | ||
| View original record | X7791 EFC3/T. 13th December, 1927. Messrs. North & Sons Ltd., Whippendell Road, Watford. Dear Sirs, Further to our letter EFC3/T. of the 12th inst. we have now done a little work on the very latest… | ||
| scan0142 | Report discussing a knocking issue and the electrical performance of EW6 machines, suggesting a larger air gap. | ||
| View original record | -2- Contd. there was a considerable knock emanating from the machine which would disappear upon short circuiting the armature. The slow speed electrical performance of these EW6 machines (with the one… | ||
| scan0143 | Cover note attaching a report to Messrs. North & Sons regarding noise reduction on the Watford EW6 Magneto. | ||
| View original record | To R. from EFC. c. E. BJ. c. De. By. c. Wor X7791 EFCL/T14.12.27. WATFORD EW6 MAGNETO+ Further to our EFC6/T13.12.27, we now attach copy of a letter addressed to Messrs. North & Sons which is in the… | ||
| scan0144 | Letter from North & Sons, Ltd. regarding magneto specifications, cam angles, and clearances. | ||
| View original record | X 7791 THE BRITISH MADE Watford SPEEDOMETERS & MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON.… | ||
| scan0145 | Sending a Watford EW6 magneto for testing on a test chassis. | ||
| View original record | X 7791 To Mx. from EFC. EFC4/T20.12.27. WATFORD EW6 MAGNETOS. We send you herewith Watford EW6 magneto No.100081, and should be pleased if you would try it on your test chassis as soon as possible and… | ||
| scan0146 | Letter to Messrs. North & Sons Ltd. regarding the noise testing of two type EW6 magnetos. | ||
| View original record | X7791 EFC3/T. 20th December, 1927. Messrs. North & Sons Ltd., Whippendell Road, WATFORD. Dear Sirs, We thank you for your letter of the 6th inst., with regard to the two type EW6 magnetos Nos.100080/1… | ||
| scan0147 | Incorrectly marked magneto rotor that nearly caused a serious accident during testing. | ||
| View original record | X7791 To Roy. from EFC. EFC12/T21.12.27. EW6 WATFORD MAGNETO ROTOR. Herewith we hand you the high tension rotor taken from EW6 magneto No.100081. It transpires that the white timing marking of this… | ||
| scan0148 | Letter from North & Sons, Ltd. regarding the modification of E.W.6 Magnetos, specifically the cam design. | ||
| View original record | X7791 SPEEDOMETERS THE BRITISH MADE Watford & MAGNETOS. NORTH & SONS, LTD. WHIPPENDALL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. CONTRACTORS TO THE ADMIRALTY, WAR… | ||
| scan0149 | Continuation sheet of a letter from North & Sons Ltd concerning special magneto cams. | ||
| View original record | NORTH & SONS LTD AH 2. Continuation Sheet No. 1. We trust that when you have received and tested the magneto with these special cams you will find them entirely satisfactory. Yours faithfully, FOR AND… | ||
| scan0150 | Letter from North & Sons Ltd. regarding the examination and testing of Magneto No. 100081. | ||
| View original record | V791 NORTH & SONS LTD., WHIPPENDELL ROAD, WATFORD. CHK/DEW.1 29th December, 1927. ROY2/MG22.12.27. Messrs. Rolls-Royce Ltd., DERBY. Dear Sirs, Magneto No.100081. We beg to acknowledge receipt of your… | ||
| scan0151 | Letter to North & Sons Ltd. clarifying specifications for EW6 chassis type magnetos, focusing on the period and instant of break. | ||
| View original record | X7791 Roy EFCL/T. 4th January, 1927. Messrs. North & Sons Ltd., Whippendell Road, Watford. Dear Sirs, We thank you for your two letters ref. CHK/DEW1&2 of the 22nd. December, dealing with aero and… | ||
| scan0152 | Letter clarifying that the angle of break may vary considerably depending on the wear of the fibre heel. | ||
| View original record | -2- Contd. Your letter gives the impression that it is desirable to "maintain the angle (i.e. period of break) for a length of time", whereas we have all along been prepared to accept the fact that… | ||
| scan0153 | Issues with incorrectly marked Watford EW6 magneto rotors. | ||
| View original record | To Roy. from EFC. X7791 EFC1/T5.1.28 WATFORD EW6 MAGNETO ROTOR. Further to our EFC12/T21.12.27m and Messrs. North's reply of the 29th ult. which you sent to us for our perusal, we have now gone into… | ||
| scan0154 | Follow-up memo requesting the results of testing a Watford EW6 Magneto on a chassis. | ||
| View original record | To Mx. from EFC. X7791 EFC3/T9.1.28. WATFORD EW6 MAGNETO. We do not appear to have received from you an answer to our EFC4/T20.12.27, asking if you would try EW6 magneto No.100081 on your chassis and… | ||
| scan0155 | Requesting confirmation regarding the supply of the E.W.6 Magneto and the settlement of points with Messrs. North & Sons. | ||
| View original record | EFC. X7791 [handwritten] Roy/Dn6/BH9.1.28. As we expect [handwritten above: require] initial Production supplies of the model E.W.6. Magneto about the middle of the present month, we shall be glad to… | ||
| scan0156 | Returned rotor arm for a Watford E.W.6 Magneto and a query about fitting a marked wheel. | ||
| View original record | EFC. from ROY. X7791 ROY4/MG10.1.28 WATFORD E.W.6 MAGNETO EFC1/T5.1.28 - Messrs. North have again returned the rotor arm, and write as copy attached - which clears up the misunderstanding. With regard… | ||
| scan0157 | Letter from North & Sons Ltd concerning a marking error on Magneto No.100081. | ||
| View original record | COPY From: NORTH & SONS LTD Whippendell Road, WATFORD CHK/DEW.6 9th January 1928 Messrs. Rolls Royce Ltd. DERBY Dear Sirs, Magneto No.100081 We beg to acknowledge receipt of your letter of the 6th… | ||
| scan0158 | Letter from North & Sons Ltd. clarifying alterations to magneto distributor and rotor arms. | ||
| View original record | - 2 - We note that in paragraphs 3 and 4 of our letter of December 29th, we refer to the break occurring on the opposite cam to that on which it occurs in the Model F.O.6, when the timing mark is… | ||
| scan0159 | Issues with a Watford EW6 magneto, including rotor phenomena and incorrect markings. | ||
| View original record | X7791 To ROY. from EFC. EFC1/T11.1.28. WATFORD EW6. MAGNETO. Referring to Roy/MG10.1.28 with attached copy of a letter from Messrs. North & Sons, we duly note their explanation of the rotor phenomena.… | ||
| scan0160 | Testing of a Watford EW.6 Magneto, found satisfactory apart from a noisy make and break. | ||
| View original record | EFC. from Mx. X7791 Mx/McM1/T11.1.28. re Watford EW.6. Magnetos In reply to your EFC4/T20.12.27 and EFC4/T9.1.28, we have tried Magneto No.100081 on chassis, and consider it satisfactory except for a… | ||
| scan0161 | Performance issues and proposed testing for a new type of Watford EW6 magneto. | ||
| View original record | X7791 To BY. from EFC. c. Roy. Mx. EFCL/T18.1.28. WATFORD EW6. MAGNETOS. We have not yet had any one magneto of this type in which everything has been right on bench and chassis tests preliminary to a… | ||
| scan0162 | Form recording the design and performance details of a magneto under test. | ||
| View original record | X7791 FORM OF RECORDING DETAILS OF MAGNETO DESIGN AND PERFORMANCE. Date:- 18-1-28 Magneto on test :- Maker:- Watford X. No.:- 7791 Type :- EW6 No :- 100081 (1) Weight in pounds :- 12.625 (2) Remarks… | ||
| scan0163 | 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:- | Make. | Break. | |---|---| | A | -11° | 98° | | B | 48° | 158° | Range :- 60° | | Retard. | Advance. | |---:|---|---| | Make. | 45° | -12°… | ||
| scan0164 | Table of distributor dimensions with columns for relative and absolute (in inches) values. | ||
| View original record | -3- Distributor dimensions. Relative. | Absolute(inches) Pitch (P) = Make ratio (M) = Range (R) = Forward overlap at full advance (Fa) = Forward overlap at full retard (Fr) = Backward overlap at full… | ||
| scan0165 | Test results including Endurance, Short/Open circuit checks, and data for a volt-speed curve. | ||
| View original record | -3a- (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 2.66 .00665 800 5.03 .00630 1200 7.11… | ||
| scan0166 | Test results including 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 .77 2000 2.96 200 1.38 2400 2.98 300 1.85 2800 3.00 400 2.15 3200 3.02 600 2.47 3600 3.04 800 2.66 1200 2.83… | ||
| scan0167 | Test results page detailing secondary milliamps, primary point gap, and contact breaker timing. | ||
| View original record | -5- Contd. (14) Secondary milliamps :- Maximum :- 21.2 Minimum :- 5.3 (15) Primary point gap after previous tests :- .010" Primary point gap .006" Contact breaker timing. | Make. | Break. | |---|---|… | ||
| scan0168 | Page detailing remarks on the operational silence of a magneto and a tangential force measurement. | ||
| View original record | -6- Contd. (16) Remarks re silence of operation :- Quiet magneto with the exception of the contact breaker which is fairly noisy. (17) Tangential force :- 1.0 lbs weight. EFC. | ||
| scan0169 | Clarifying that a specific Watford EW6 Magneto was for electrical testing only and correcting a number given in error. | ||
| View original record | To BY. from EFC. c. Roy. Mx. X7791 EFC5/T18.1.28. WATFORD EW6 MAGNETOS. Further to our EFC1/T18.1.28 of this morning, we regret we overlooked the fact which should have been stated that magneto… | ||
| scan0170 | Fitting a tested Watford EW6 magneto to vehicle 15-EX for a 10,000-mile test. | ||
| View original record | To RHC. from EFC. c. HS/AJL. X7791 EFC1/T19.1.28. Herewith we hand to you Watford EW6 magneto No.100081 which we have now tested. This should be fitted to 15-EX for the 10,000 mile test, in place of… | ||
| scan0171 | Test results and modification suggestions for a Watford EW6 magneto which failed on leaky gap performance. | ||
| View original record | RR 238 (150 BKS.) (DB 481-8-12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.T.C. Order No. WC64 Customer's No. X 7791 X7791 19 - 1 - 1928 Watford EW6 magneto No 100081. We have now tested this… | ||
| scan0172 | Instructions regarding magneto performance, timing, and primary gap variation. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. Customer's No. performance on the leaky gap would be considerably better. The low speed performance is particularly good. This magneto does not appear to… | ||
| scan0173 | Telegram received by telephone confirming the dispatch of six B.W.6 magnetos. | ||
| View original record | RR 144A (50BKS.) (DB B14 6-5-25) MP 317354 EFC X7791 ROLLS-ROYCE LTD. TELEGRAM RECEIVED BY TELEPHONE. Time Received: 11-34 Date: 20-1-28 To: Raycar Derby By: Ma from: Watford 11-2 Hope to send six… | ||
| scan0174 | Letter from North & Sons Limited regarding work on an EW6 Magneto, No. 100082. | ||
| View original record | X7791 COPY. NORTH & SONS LIMITED, WHIPPENDENLL ROAD, WATFORD. Roy/Dn23/BH. CHK/DEW.13. 20th January, 1928. Messrs. Rolls-Royce Ltd., DERBY. Dear Sirs, EW6 Magneto No.100082. In reply to your letter of… | ||
| scan0175 | Communication from North & Sons Ltd about the early E.W.6 Magneto No.99171. | ||
| View original record | X7791 BY. from ROY. c. to EFC. c. to MX. ROY10/MG23.1.28 Attached is copy of a communication from Messrs. North & Sons Ltd, relative to the early E.W.6 Magneto No.99171, which Mr. North brought here… | ||
| scan0176 | Letter from North & Sons Ltd. detailing the findings of a fault in an EW6 Magneto. | ||
| View original record | COPY From: NORTH & SONS LTD. Whippendell Road WATFORD 19th January 1928 Messrs. Rolls-Royce Ltd. DERBY Dear Sirs, Following the visit of your Mr. H. Royce to our works on the 17th instant, when he… | ||
| scan0177 | Letter to a supplier regarding an unexpected design change on EW.6. Type Magnetos. | ||
| View original record | X7791 c. By. c. Roy. c. Mailing. EFC2/T. 31st January 1928. Messrs. North & Sons Ltd., Whippendell Road, WATFORD. Dear Sirs, EW.6. Type Magnetos. Referring to the above magnetos, we notice on the five… | ||
| scan0178 | Handing over two Watford EW.6 magnetos for a noise test. | ||
| View original record | X7791 Mx. 2.2.28. We have to-day handed to Mx. two Watford EW.6 magnetos Nos.100096 and 105302 for noise test. EFC. | ||
| scan0179 | Tentative specification and initial test results for the Watford Type EW6 magneto for the Phantom chassis. | ||
| View original record | X7791 To BY. from EFC. c. SFT. c. SFT/Mr. Ellis. c. Mx. EFC4/T3.2.28. WATFORD TYPE EW6 MAGNETO FOR RR. PHANTOM CHASSIS. X8781m Herewith we send to you copy of Specification of Production Inspection &… | ||
| scan0180 | Production inspection and test specification for a Watford Type EW6 Magneto. | ||
| View original record | 4.1.28. X.7791. WATFORD TYPE EW6 MAGNETO FOR R.R. 40/50 HP. CHASSIS. X.8781m. SPECIFICATION OF PRODUCTION INSPECTION & TEST. (1) The contact breaker cover, distributor block and rear end cover plate… | ||
| scan0181 | Page 2 of test procedures for electrical components like magnetos and circuits. | ||
| 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… | ||
| scan0182 | Page of a magneto testing procedure detailing sparking speeds and meshing checks. | ||
| View original record | -3- Contd. be further observed whilst running the magneto that the meshing of the distributor gear wheel with the pinion is correct; incorrect meshing being indicated by an uneven rattle emanating… | ||
| scan0183 | Faults with the ignition hand control and magneto, with suggestions for improvements. | ||
| View original record | E. HS½) from R. BY. EFC) (At Le Canadel) copy to BJ. Wor. X7791 R4/M2.2.28. X7791 X7240 EAC.7. IGNITION HAND CONTROL AND MAGNETO (WATFORD) I noticed on the above car that the hand control was not… | ||
| scan0184 | The testing of four EW6 magnetos and the causes of the noise they produced. | ||
| View original record | EFC. from Hs/AJL. X7791 3.3.28. EW6. MAGNETOS. We have tested the four magnetos which you handed to us with the following results. Only one of these (No.100094) was considered acceptable with regard… | ||
| scan0185 | Production inspection and test log for a Watford Type EW6 Magneto. | ||
| View original record | H.E.W. X7791 X. 9781m. WATFORD TYPE EW6 MAGNETO. X. 7791. PRODUCTION INSPECTION AND TEST. Date. (1) Magneto No. Remarks. (2) Range (degrees) (>58°) (3) Remarks. (4) Tangl. force. 1 to 2 lbs. (5)… | ||
| scan0186 | Requesting a report on the production testing of Watford Type EW6 magnetos. | ||
| View original record | X7791 To SFT. from EFC. c. SFT/Mr. Ellis. EFC7/T6.2.28. WATFORD TYPE EW6 MAGNETOS. Concerning the production testing of EW6 Watford magnetos, for which we have quite recently given you a Specification… | ||
| scan0187 | The production tests and failures of six Watford EW6 magnetos. | ||
| View original record | RR 238 (150 BKS.) (DB 451-8-12-24) MP 306975 X7791 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.F.C Order No.: WC71 Customer's No.: X 7791 Production tests of Watford EW6 magnetos. We have now completed in… | ||
| scan0188 | Instruction on production test specifications for the Phantom engine magneto. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. Customer's No. We do not think that our production test specification should be altered in any way as the first… | ||
| scan0189 | Test results for nine E.W.6 magnetos, detailing safety gap, tangential force, and lowest sparking speed. | ||
| View original record | X9791 EFC. SFT/JMW10/DB8.2.28. In reply to your memo EFC7/T.6.2.28., we have tested 9 - E.W.6. Magnetos with the following results. Mag. No. Length of Safety Gap. Tangential Force. Lowest sparking… | ||
| scan0190 | The noise testing of two EW.6 type magnetos, one of which was found to be unsatisfactory. | ||
| View original record | X7791 EFC. from Mx. Mx9/T9.2.28 EW.6. Magnetos We have now completed the test on the two magnetos of the above type which you submitted to us. The first one No100096 was unsatisfactory for noise, your… | ||
| scan0191 | Return of four noisy Watford EW6 magnetos for cam modification. | ||
| View original record | X7791 To Roy. from EFC. EFC2/T11.2.28. c. D/BP. c. Despatch Stores. WATFORD EW6 MAGNETOS. We are sending into the Stores to await your instructions Watford EW6 magnetos Nos.100082, 100093/6/7. These… | ||
| scan0192 | The investigation into the noisiness of Watford EW6 magnetos and the testing of modified cams. | ||
| View original record | To R. from EFC. c. BJ. E. c. Da. Ey. c. Wor. X7791 EFC1/T11.2.28. WATFORD EW6 MAGNETOS. X8793 In our last report EFC6/T13.12.27, we stated that we were pursuing the question of noisiness of the make… | ||
| scan0193 | The testing of experimental magnetos, focusing on noise issues and potential causes. | ||
| View original record | -2- Contd. these machines back to alter the cams in accordance with our suggestions. Since the time of writing EFC6/T13.12.27 in which reference was made to the EW6 magneto No.100080 on 14-EX which… | ||
| scan0194 | The noise testing of various magneto models and their contact breaker levers. | ||
| View original record | Contd. -3- "In addition to the above, one of the suggested modified type of contact breaker lever was tried on each of two of the above machines in turn, in order to see if noisiness was affected by… | ||
| scan0195 | Solutions for machine noise and excessive tangential operating force on levers, with references to specific parts and manufacturers. | ||
| View original record | EFC1/T11.2.28. -8- Contd. to his satisfaction. When a particularly quiet machine is wanted for some special purpose, one of our Lucas machines is asked for. It has been suggested that Messrs. North… | ||
| scan0196 | Technical memorandum discussing issues with the angular location and electrical performance of six magnetos. | ||
| View original record | -5- Contd. A point we have noted on these six magnetos is that the angular location of the distributor rotor is now made by means of a stud let into the bakelite wheel engaging a hole in the body of… | ||
| scan0197 | The performance, durability, and testing of Lucas magnetos, comparing different contact point materials. | ||
| View original record | -6- Contd. of the remainder which were tested, showed a considerably less good retard low speed performance. We do not see good reason for easing our production test specification, as we find that the… | ||
| scan0198 | Timing test results for a Watford EW6 Magneto No.100082. | ||
| View original record | X7791 14.2.28 WATFORD EW6 MAGNETO NO.100082. TIMING TESTS. Primary gap .012" Advance. Retard. Make. 3º 63º Range 60.5º Break. 99º 160º Make ratio Make 182º 243º = .547 Break 283º 343º Primary gap… | ||
| scan0199 | Requesting a Watford EW6 magneto from production for a 10,000-mile test. | ||
| View original record | X7791 To RHC. from EFC. EFC4/T24.2.28. WATFORD EW6 MAGNETO FOR 12-EX. This was referred to in our list of items for this 10,000 mile test, dated to-day. We should be pleased if you would arrange to… | ||
| scan0200 | The satisfactory testing of a sample magneto, No. 106012, on a stationary rig and three different chassis. | ||
| View original record | EFC from Mx. X7791 Mx3/T28.2.28 EW.6. Magneto The sample Magneto No.106012 which was brought to the Works by Mr North on Thursday the 23rd inst. which was heard by us all on our stationary rig, has… | ||
| scan0201 | Magneto No.106012 which has developed a bad knock. | ||
| View original record | EFC from Mx. Mx16/T28.2.28 EW.6. Magneto No.106012. Since issuing our report Mx3/T28.2.28 on the above, the magneto in question has developed a bad knock. This has been demonstrated to your Assistant… | ||
| scan0202 | Report on a special duralumin contact breaker lever for a Watford Magneto. | ||
| View original record | To EY. from EFC. c. Mx. X9791 EFC1/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… | ||
| scan0203 | Instructions regarding a test on special contact breaker levers for Watford chassis magnetos. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 X7791 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.T.C. Order No.: WC80 Customer's No.: X 8796 [crossed out] X 7791 Watford chassis magneto contact breaker We have… | ||
| scan0204 | Test report on a magneto, detailing a durability run and subsequent inspection for wear on the rubbing block and contact points. | ||
| View original record | RR 238 (150 BKS.) (DB 481-8-12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To________________ 19 Order No.____________ Customer's No.________________ The magneto was run at 3000 rpm for 160 hours on… | ||
| scan0205 | Use of EW.6 magnetos alongside the E.O.6 type to avoid costly scrap. | ||
| View original record | MX. c. Sft. c. ROY c. EFC. X7791 BY4/G.2.3.28. MAGNETOS. -------- Your memo ref. Mx3/T.1.3.28. I see no objection at all to starting to use the EW.6 magnetos, sandwiching same in with the E.O.6 type,… | ||
| scan0206 | Suggestion to replace a noisy Watford magneto on car 8-EX with a Lucas magneto from car 16-EX. | ||
| View original record | To ALT. X7791 TO. RHC. FROM EFC. C. Hs/AL. EFCl/T6.3.28. WATFORD & LUCAS MAGNETOS. With reference to the Watford magneto on 8-EX which is reported noisy and which you would like to exchange for a… | ||
| scan0207 | Internal memorandum regarding the performance and modification of Watford EW6 magnetos. | ||
| View original record | To Roy. from EFC. cc. By. x7791 EFC9/T7.3.28. WATFORD EW6 MAGNETOS. With reference to our EFC2/T11.2.28 we would now like to suggest to the makers that these four machines be converted to continuous… | ||
| scan0208 | Graph comparing the Volt-Speed and Ampere-Speed curves for the primary windings of various magnetos. | ||
| View original record | X7791 O.C. VOLTS. 22 20 18 16 14 12 10 8 6 4 2 0 S.C. AMPERES. 3.0 2.5 2.0 1.5 1.0 .5 0 SPEED r.p.m. 0 400 800 1200 1600 2000 2400 2800 3200 3600 R. BOSCH FU6R No 31859. VOLTS WATFORD EW6 No 99171.… | ||
| scan0209 | Graph showing Open Circuit Volt-Speed and Short Circuit Ampere-Speed curves for the primary windings of Watford EW6 Magnetos. | ||
| View original record | X7791 No. 100081. No. 99802. No. 99171. O.C. VOLTS S.C. AMPERES. OPEN CIRCUIT VOLT-SPEED AND SHORT CIRCUIT AMPERE-SPEED CURVES OF PRIMARY WINDINGS OF WATFORD EW6 MAGNETOS. AMPERES ----- VOLTS. _____… | ||
| scan0210 | Covering memo for an attached report regarding Watford EW6 magnetos. | ||
| View original record | To EY. from EFC. X7791 EFC8/T7.3.28. WATFORD EW6 MAGNETOS. Please find attached copy of my assistant's report WC.83. You may care to take up this matter with the makers. EFC. | ||
| scan0211 | Recommendation to prevent a short circuit on Watford EW6 Magneto contact breaker covers by filling a riveting hollow with insulating compound. | ||
| View original record | EFC. WC.83. COPY 7.3.28. CONTACT BREAKER COVERS ON WATFORD EW6 MAGNETOS. On these covers the securing spring is liable to be sprung into the wrong locating hollow, there being two hollows in the… | ||
| scan0212 | The testing of a special Watford EW6 magneto, noting its design differences and a 'knock' developed during trials. | ||
| View original record | To R. from EFC. c. BJ. E. c. Da. By. c. Wor. X7791 EFC8/T8.3.28. WATFORD EW6 MAGNETOS. The position in regard to these magnetos generally has not progressed so very much further than that indicated in… | ||
| scan0213 | Magneto testing, modifications for noise reduction, and fitting to experimental cars. | ||
| View original record | -2- Contd. its armature, but with the distributor removed. The result is contained in my assistant's report WC.82 copy of which is attached. It will be noted that in this report there is reference to… | ||
| scan0214 | Continued page discussing the angular location of a distributor rotor for EW6 machines. | ||
| View original record | -3- Contd. In regard to the angular location of the distributor rotor this is, as referred to in the case of EW6 machines generally, made by means of a stud let into the bakelite wheel engaging a hole… | ||
| scan0215 | Test report on a Watford EW6 Magneto, focusing on diagnosing and resolving a noise issue. | ||
| View original record | EFC. WC.82. 7.3.28. WATFORD EW6 MAGNETO NO.106012. This magneto has a continuous cam ring almost identical with the Lucas, the cams being ground out of the ring. Although the cams are not ground with… | ||
| scan0216 | Internal instruction memo raising questions about the design and modification of Watford EW6 magnetos. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12 x4) MP 306975 X7791 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.7.C. Order No. WC87 Customer's No. X 7791 Watford EW6 magnetos. With reference to the above we have a few points… | ||
| scan0217 | Series of queries and statements regarding magneto issues, specifically contact breaker point wear and the potential use of tungsten. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To 2 Order No. Customer's No. 19 (3) Are they aware that the continuous cam magneto No 106012 had not got slow make cams?… | ||
| scan0218 | Instruction regarding the specifications and performance of magnetos with tungsten points. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To 3 Order No. Customer's No. 19 points but with careful arrangement of magnet size and armature winding & not forgetting… | ||
| scan0219 | Production inspection and test log for Watford Type EW6 magnetos. | ||
| View original record | X.7791. X.878lm. WATFORD TYPE EW6 MAGNETO. X.7791. PRODUCTION INSPECTION AND TEST. Date. Magneto No. (1) Remarks. (2) Range (degrees) (>58°) (3) Remarks. (4) Tangl. force. 1 to 2 lbs. (5) Remarks. (6)… | ||
| scan0220 | Unfavourable test results for three out of four Watford Magnetos on a 40/50HP chassis. | ||
| View original record | E7C X779b [Redacted] from Mx. Mx5/T14.3.28 re 40/50HP Chassis - EW.6. Watford Magnetos Further to memos Mx3/T1.3.28 and By4/C2.3.28, we have now tried 4 - EW.6 Magnetos on Production chassis, and have… | ||
| scan0221 | Letter to Messrs. North & Sons Ltd. discussing various technical points regarding magnetos, including cam rings and contact point wear. | ||
| View original record | X7791 EFC7/T. 14th March, 1928. Messrs. North & Sons Ltd., Whippendell Road, Watford. Dear Sirs, Watford EW.6. Magnetos. Merely for your convenience of reference to the points contained in this… | ||
| scan0222 | Magneto testing, detailing issues with contact wear, noise, and a comparison of gear materials. | ||
| View original record | -2- Contd. this will have an effect on the low speed sparking. EW6 magneto No.99802 on one of our experimental cars 9-EX, has only run 3856 miles, but the contacts have worn down 50%. It appears that… | ||
| scan0223 | Noisy magneto in a 15-EX Phantom chassis with sports body after 9000 miles. | ||
| View original record | 7791 Extract from Hs/GWH1/LG17.3.28. REPORT ON 15-EX PHANTOM CHASSIS WITH SPORTS BODY (9000 miles). MAGNETO. EW6. WATFORD NO.100081. The make amd break mechanism is noisy. This can be heard in the… | ||
| scan0224 | Issues and test results for several Watford Magnetos on a 40/50HP Chassis EW.6. | ||
| View original record | X7791 from Mx. Mx7/T21.3.28. re 40/50HP Chassis EW.6. Watford Magnetos. Further to my memo Mx5/T14.3.28, for your information we give you below particulars of the EW.6. Watford Magnetos we have… | ||
| scan0225 | Reporting that a Watford Magneto on chassis EW.6 has developed knocks from the gears. | ||
| View original record | X 7791 EFC from Mx Mx10/T21.3.28 re 40/50HP Chassis EW.6. Watford Magnetos Since writing our memo Mx7/T21.3.28, EW.6. Watford Magneto No.105340 has developed knocks, presumably from the gears, after… | ||
| scan0226 | Failure of a Watford EW.6 magneto which requires investigation into the production testing process. | ||
| View original record | X.7791 . To Mx. from EFC. c. Ev. EFC4/T23.3.28. WATFORD EW.6. MAGNETOS. We understand from Mr. Daykin that recently you had an EW6 magneto which failed to start the engine immediately on first trial,… | ||
| scan0227 | Letter from North & Sons Ltd. discussing the manufacture and supply of Watford magnetos. | ||
| View original record | X7791 [Logo: The British Made Watford] SPEEDOMETERS & MAGNETOS. NORTH & SONS, LTD. WHIPDENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. TELEGRAMS: AEROMAGS WESTCENT… | ||
| scan0228 | Noisy Watford EW6 magnetos, with an attached letter from North & Sons. | ||
| View original record | To BY. from EFC. c. Mx. X7791 EFC1/T24.3.28. WATFORD EW6. MAGNETOS. Herewith we attach copy of a letter received from Messrs. North & Sons in answer to ours EFC7/T. 14.3.28 which we have sent to you… | ||
| scan0229 | Instruction regarding the low-speed performance issues and rejection of Watford EW6 and E06 type magnetos. | ||
| View original record | RR 238 (150 BKS.) (DS 451-8-12 24) MP 306975 X7791 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.7.C. X8796 26-3-1928 Order No. WC 91 Customer's No. X 7791 Low speed performance of Watford EW6 and E06 type… | ||
| scan0230 | Test results for magneto sparking speeds at different advance and retard settings with and without a standard leak. | ||
| View original record | (2) which it passed OK. The std leak and test gap was then used and the low speed figures with and without the leak were as follows:- Minimum speed for regular sparking on 5.5mm gaps in air. advance… | ||
| scan0231 | Test results for magneto low speed performance, concluding it has insufficient energy to satisfy production specifications. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. 19 To Order No. (3) Customer's No. The low speed figures with and without the leak were as follows:- Minimum speed for… | ||
| scan0232 | Instruction sheet detailing revisions to the specification for a Phantom engine's magneto and low-speed figures. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. (4) Customer's No. our Phantom engine requirements although it passes our general Specification. We therefore… | ||
| scan0233 | Comparison of the volt-ampere capacities of Lucas ER6, Watford EW6, and E06 magnetos for engine cold starting. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. (5) Customer's No. 19 We do not consider that this is asking for the impossible as MX has informed us that the… | ||
| scan0234 | Letter to Messrs. North & Sons Ltd. regarding the lubrication intervals for Watford E.W.6. Magnetos. | ||
| View original record | Y7791 c. Mailing c. By c. By/NHW. EFC2/T. 26th March, 1928. Messrs. North & Sons Ltd., Whippendell Road, Watford. Dear Sirs, Lubrication of Watford E.W.6. Magnetos. We have noted your recommendation… | ||
| scan0235 | Letter to Messrs. North & Sons Ltd. regarding cold-start issues with EW.6 magnetos and requesting primary winding specifications. | ||
| View original record | X7791 C. Mx. C. Ry. EFC2/T. 27th March, 1928. Messrs. North & Sons Ltd., Whippendell Road, WATFORD. X8790 X7791 Dear Sirs, Owing to the fact that some of the EW.6. magnetos have not been able to start… | ||
| scan0236 | Letter from North & Sons, Ltd. acknowledging receipt of a revised specification for an E W 6 Magneto. | ||
| View original record | X.7791 SPEEDOMETERS THE BRITISH MADE Watford & MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. CONTRACTORS TO THE ADMIRALTY, WAR… | ||
| scan0237 | Letter from North & Sons, Ltd. regarding the lubrication and bearing type for Watford magnetos. | ||
| View original record | X7791 SPEEDOMETERS & MAGNETOS. THE BRITISH MADE Watford NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON… | ||
| scan0238 | Confirming the 500-mile oiling interval for EW.6 magneto distributor bearings. | ||
| View original record | X7791 BY/NHW. from EFC. c. By. EFCI/T29.3.28. In reply to our query re oiling of distributor bearing of EW.6. magnetos, we have received a letter from Messrs. North, copy of which we attach. It… | ||
| scan0239 | The unsatisfactory cold-start performance and return of a Watford EW6 magneto. | ||
| View original record | X7791 To Mr. Topliss (Order office). EFC3/T29.3.28. WATFORD EW6. MAGNETO NO.105321. We have, having agreed that this magneto will not satisfactorily start the engine cold, already tested this as it… | ||
| scan0240 | Status report on the performance of experimental and production Watford EW6 magnetos. | ||
| View original record | X7791 5.4.28. WATFORD EW6 MAGNETOS. PRECIS OF PRESENT POSITION TO DATE. (a) Experimental machines. 99802. Now on 9-EX reported noisy. 100080. " " 14-EX (Le C.) 100081. " " 15-EX (smashed ?) reported… | ||
| scan0241 | Design, performance, and sourcing of Watford EW6 magnetos for the Phantom model. | ||
| View original record | EFC. ) From R. Hs. Ey.)(Le Canadel) X7791 FA/M7.4.28. REC'D AT WW. DURING EASTER & DESPATCHED 11.4.28. c. to BJ. Wor. RG. E. C. SG. Mr. North (North & Sons Ltd). CAR MAGNETOS. WATFORD EW6 FOR PHANTOM.… | ||
| scan0242 | The unsuccessful attempt to fix noisy Watford Magnetos by replacing the distributor gear. | ||
| View original record | EFC X7791 Mx/McM3/T11.4.28 Watford Magnetos EW.6. As requested in your EFC1/T24.3.28, we return herewith your file copy of EFC7/T - 14th March 1928, which we have noted. In a number of cases we tried… | ||
| scan0243 | The disappointing performance of Watford EW.6 magnetos, citing issues with noise and poor low-speed electrical performance. | ||
| View original record | To R. from EFC. c. BJ. Da. c. E. EY. c. Wor. X7791 EFC1/T11.4.28. WATFORD EW.6. MAGNETOS X. 7791 X8793 Refs.of previous reports : EFC1/T11.2.28 EFC8/T8.3.28. There is now further to report on these… | ||
| scan0244 | Poor magneto performance, cold start failures, and subsequent endurance testing. | ||
| View original record | Contd. -2- EFCl/11.4.28. applied to the magnetos passed to our Dept." Later magnetos seem to have been rather poor, and we have noticed on our own tests that they are just on the limit. In fact it has… | ||
| scan0245 | Magneto testing, discussing noise issues, modifications with cam rings, and distributor rotors. | ||
| View original record | -3- Contd. 1450 r.p.m. (See EFC8/T8.3.28), the test being largely one of the endurance of the all-bakelite gears. The two machines (Nos.LOO080/1) which were put on 14-EX and 15-EX for France were also… | ||
| scan0246 | Endurance testing of magneto components, specifically points and gears from different suppliers. | ||
| View original record | -4- Contd. Our endurance test will also show up the endurance of the platinum points. We have suggested to Messrs. North the use of tungsten points as on the Lucas machine, and their answer runs as… | ||
| scan0247 | Suggestion to obtain Lucas machines for experimental production testing to prove their superiority when supplied in larger quantities. | ||
| View original record | -5- Contd. viz. the one that had run on your 7-EX in France. It is difficult to know what more can be done to help them. We suggest that we should be permitted to obtain a number of Lucas machines,… | ||
| scan0248 | Selection of magnetos, comparing Watford, Lucas, and German Bosch models for performance, reputation, and price. | ||
| View original record | EFG. HS. ) FROM R. ROY. BY. ) (At Le Canadel.) C. to BJ. E. FL. x7791 re. MAGNETOS - WATFORD, etc. Regarding the make of magnetos for our cars, it is not only a question of what gives the best… | ||
| scan0249 | Instructions regarding the test results for a repaired and reconditioned Watford EW6 magneto. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12 24) MP 306975 X7791 ROLLS-ROYCE LTD. INSTRUCTIONS. To E7C. 16 - 4 - 1928 Order No. WC97 Customer's No. X8796 Watford EW6 magneto No 99171. We have just received this… | ||
| scan0250 | Electrical experimental record sheet for a Watford EW6 magneto, number 99802. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS X7791 Watford EW6 magneto No 99802 X.&No:-7791 Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. | Total… | ||
| scan0251 | Confirming the return of converted Watford EW6 magnetos from Messrs. North. | ||
| View original record | X7791 EFC2/T19.4.28. WATFORD EW6. MAGNETOS. We have today received back from Messrs. North Magnetos No.100082, 100093/6/7 which have been converted to continuous cams, in accordance with our letter… | ||
| scan0252 | Exacting requirements for magnetos, comparing Watford and Robert Bosch products. | ||
| View original record | To R. from EFC. c. BJ. E. c. Da. By. c. Roy. Fl. X7791 EFCl/T21.4.28. X420 X8790 MAGNETOS: Your ref. Rl/M16.4.28. We think the difficulty with magnetos is principally that our requirements are so much… | ||
| scan0253 | Electrical principles, component selection from suppliers like Watford and Messrs. North, and related reports. | ||
| View original record | -2- Contd. It should be remembered that our range of 58º is rather difficult to produce satisfactorily electrically - in fact several makers will not attempt it. In regard to the electrical… | ||
| scan0254 | Consideration of various magneto makes for the Phantom model. | ||
| View original record | To R. from EFC. c. BJ. E. SG. c. Da. C. BY. X7791 EFC1/T23.4.28. + MAGNETO - PHANTOM X.8790 Various magnetos of other makes have been considered from time to time as follows :- M.L. In August 1925 the… | ||
| scan0255 | Report comparing the performance of magnetos from Scintilla, Simms, and Lucas. | ||
| View original record | Contd. -2- i.e. sufficiently so for our Test Dept. to condemn it, it gave a very good alround electrical performance. It was also 2 lbs. lighter than other machines and also cheaper. It has always… | ||
| scan0256 | Summary of magneto rejections on production chassis from January to April 1928. | ||
| View original record | -3- Summary of magneto rejections on R.R. production chassis, Jan. to April 1928. Type of Magneto. No. of rejections for elec. faults particularly low speed sparking. No. of rejections for mechanical… | ||
| scan0257 | Return of three EW6 Watford Magnetos to North & Sons Limited for rectification. | ||
| View original record | EFC. ✓ C. to Sft. C. to DF. RECEIVED 24 APR 1928 X7791 ROY/JT17/HP23.4.28. EW6 Watford Magnetos 40/50 HP. In accordance with our order R.6490 we duly returned to Messrs. North & Sons Limited, three of… | ||
| scan0258 | Letter from North & Sons Ltd. reporting on the testing of three EW6 Watford Magnetos. | ||
| View original record | COPY. NORTH & SONS LTD. 19th April 1928. CHK-DEW.3. ROY/JTs/HP. Messrs. Rolls-Royce Limited. Nightingale Road, DERBY. Dear Sirs, EW6 Watford Magnetos 40/50 HP. In reply to your letter of March 15th we… | ||
| scan0259 | Testing and specification compliance of EW6 Watford magnetos. | ||
| View original record | X7791 To Roy. from EFC. c. Sft. Mx. BY. EFC2/T24.4.28. EW6 WATFORD MAGNETOS. With reference to the letter CHK-DEW.3. of the 19th inst., attached to your ROY/JT17/HP23.4.28, the matter of fitting the… | ||
| scan0260 | Electrical experimental record sheet for a Watford type EW6 magneto No 99171. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS x7791 X.&No:- 7791 Watford type EW6 magneto NO 99171 Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. |… | ||
| scan0261 | Testing of Watford EW6 magnetos fitted with continuous cam rings. | ||
| View original record | To Mx. from EFC. X7791 EFC3/T24.4.28. WATFORD EW6 MAGNETOS. As referred to in our EFC2/T24.4.28, we are handing you herewith two machines, Nos. 100096 and 100097 which are two of four returned to us… | ||
| scan0262 | Fitting a new Watford EW6 magneto with a continuous cam ring to reduce noise. | ||
| View original record | To RHC. from EFC. c. HS/AJL. X7791 EFC2/T25.4.28. We hand you herewith a new Watford EW6 magneto No.100093 fitted with a continuous cam ring to reduce the noise. Will you please have this fitted to… | ||
| scan0263 | Examination and rectification of various Watford Magnetos. | ||
| View original record | H.E.W to N.X.7791 EFC. C. to G/WFH. ROY/JT20/HP25.4.28 Watford Magnetos. (Enblyn) In accordance with our order R.6531 and R.6568 we returned to Messrs. North & Sons Limited. 10 of these magnetos, also… | ||
| scan0264 | The testing and repair status of various magnetos. | ||
| View original record | (2) ROY/JT20/HP25.4.28. EW6 Magnetos - cont'd "No.105341, 106009 and 105340 are being fitted with new gears and will be returned as quickly as possible. ---- RO1 Magnetos - No.105626 requires a new… | ||
| scan0265 | Cover memo for a laboratory endurance test report on a Watford EW6 Magneto, No. 105302. | ||
| View original record | To R. from EFC. c. BJ. E. c. Da. EY. c. Wor. K7791 EFC2/T28.4.28. LABORATORY ENDURANCE TEST OF WATFORD EW6. MAGNETO, NO.105302. Please find attached copy of my assistant's report WC.99 with reference… | ||
| scan0266 | Endurance test report for a Watford EW6 Magneto, No. 105302. | ||
| View original record | EFC. WC.99. 28.4.28. WATFORD EW6 MAGNETO No.105302. This magneto has now completed an endurance test in the laboratory having been run at 1450 r.p.m. for 125 hours and at 2900 r.p.m. for 312 hours,… | ||
| scan0267 | Suspected depreciation of magnetism in Watford magnetos after delivery and testing. | ||
| View original record | X7791 To Mx. from EFC. c. Roy. c. Ev. EFC3/T28.4.28. WATFORD MAGNETOS TYPES EO6, EW6 and RO1. We suspect that Watford magnetos are subject to some depreciation of magnetism after delivery to us and… | ||
| scan0268 | Depreciation of magnetism in Watford magnetos types E06 and R01. | ||
| View original record | EFC. X7791 Mx10/T30.4.28. WATFORD MAGNETOS TYPES E06 AND R01 X.7791 X.8796 X.5790 In reply to your EFC3/T28.4.28 we have not up to the present any means of determining whether there is any… | ||
| scan0269 | Test results and modifications for EW6 Watford Magnetos with North & Sons. | ||
| View original record | X7791 EFC. ROY/JT3/HP5.5.28. EW6 Watford Magnetos. Reverting to EFC2/T24.4.28 respecting certain EW6 type Magnetos returned to makers for necessary correction, referred to in Mx5/T14.3.28. Messrs.… | ||
| scan0270 | Re-conditioning and dispatch of two Watford EW6 magnetos. | ||
| View original record | x7791 To Roy. from EFC. c. Hs/CEP. EFC4/T7.5.28. WATFORD EW6 MAGNETOS. Herewith we hand to you Watford EW6 magneto No.105302 this being the machine that we have run on an endurance test as reported in… | ||
| scan0271 | Investigation and testing of Watford EW6 magnetos. | ||
| View original record | To Roy. from EFC. c. Mx. X7791 EFC2/T7.5.28. WATFORD EW6 MAGNETOS. Answering your ROY/JT3/HP5.5.28 we should be pleased if you would arrange for the magneto No.100084 to be returned to us. It… | ||
| scan0272 | Analysis of short-circuit ampere-speed curves for various chassis magnetos. | ||
| View original record | To R. from EFC. c. EJ. E. c. Ry. Wor. c. Hc. Y7791 EFC/TS.5.28. CHASSIS MAGNETOS X8790 It will be recalled that we have been in the habit of quoting the results of observations of the short circuit… | ||
| scan0273 | Graph of short circuit ampere-speed curves for various magnetos, with amperes expressed as a percentage of the value at 3200 RPM. | ||
| View original record | SHORT CIRCUIT AMPERE-SPEED CURVES OF VARIOUS MAGNETOS WITH THE AMPERES EXPRESSED AS A PERCENTAGE OF THE VALUE AT 3200 R.P.M. Y-Axis: PERCENTAGE X-Axis: SPEED (R.P.M.) REF. NO. | MAGNETO 1. | WATFORD.… | ||
| scan0274 | Testing and re-conditioning of Watford EW6 magnetos. | ||
| View original record | X7791 To Roy. from EFC. c. Hs/CEP. EFC1/T11.5.28. WATFORD EW6 MAGNETOS. Herewith we hand to you Watford EW6 magneto No.105302 this being the machine that we have run on an endurance test as reported… | ||
| scan0275 | Requesting two EW6 type magnetos to be handed to the Experimental Department for further testing. | ||
| View original record | V7791 G/MB. c. to EFC. ROY/JT18/HP11.5.28. EW6 type Left-hand 40/50 HP. Magnetos. With reference to the 10 E.77088 EW6 type Magnetos booked in on G/R sheet 60486 of 9th inst. we shall be glad if you… | ||
| scan0276 | Results of unit and road tests for Magneto No. 100096, noting good performance but requiring slight modification. | ||
| View original record | EFC [STAMP: Hs MAY 15 1928] X7791 Mx's Dept, Mx is absent Mx/MdM5/T14.5.28. re EW.6. Magneto No.100096. With reference to your EFC3/T24.4.28, the above magneto has been run on a full unit test, also… | ||
| scan0277 | Test results for EW6 Magneto No.100097 and a query about magnetos Nos.100096/7. | ||
| View original record | EFC X7791 Mx's Dept.Mx is absent Mx/McM3/T19.5.28. re EW6 Magneto No.100097. Further to our Mx/McM5/T14.5.28, the above Magneto has now passed through test i.e. Unit test, 200 miles on road, and 2… | ||
| scan0278 | Instruction sheet detailing the test results of three Watford EW6 magnetos. | ||
| View original record | RR 238 (150 BKS.) (DB 481-8-12 24) MP 306975 X7791 ROLLS-ROYCE LTD. INSTRUCTIONS. To E7C. Order No. WC 106 Customer's No. X 7791 Watford EW6 magnetos. We have had handed to us for test three Watford… | ||
| scan0279 | Instruction to test a new magneto and gear setup for improved electrical performance, noise, and long-term reliability. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To (2) Order No. Customer's No. We now think that the adoption of a continuous cam ring and better cut gears with the more… | ||
| scan0280 | Instruction sheet detailing the rejection and subsequent re-testing of a Watford EWG magneto. | ||
| View original record | RR 238 (150 BKS.) (DB 451-8-12-24) MP 306975 X7791 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.F.C. Order No. WC104 Customer's No. X7791 14-5-1928 Watford EWG magneto No.100084. This magneto was rejected by… | ||
| scan0281 | Instruction sheet investigating a magneto's low-speed sparking performance. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. To 2. Order No. Customer's No. The low speed sparking figures were Advance 55 rpm Central 100 rpm and Retard 135 rpm. We took this machine to the Test Dept and they… | ||
| scan0282 | Confirming the return of three tested Watford EW6 magnetos to Central Stores. | ||
| View original record | X7791 To Central Stores. EFC/T16.5.28. We are handing you back herewith the three Watford EW6 magnetos which were loaned to us for test, Nos.100084, 107842, 107858. These have been tested O.K. and… | ||
| scan0283 | Performance and testing of Watford EW6 magnetos. | ||
| View original record | ROY/JT. from EFC. EFC1/T17.5.28. WATFORD EW6 MAGNETOS. Further to our EFC2/T7.5.28 and your Roy/JT3/HP 5.5.28, with reference to EW6 magneto No.100084, we duly received this magneto returned back from… | ||
| scan0284 | Performance and testing of EW6 Watford Magnetos with continuous cam rings. | ||
| View original record | To BY. from EFC. c. Mx. HS/ALL X.7791 EFC2/T21.5.28. EW6 WATFORD MAGNETOS WITH CONTINUOUS CAM RINGS. We have received Mr. Maddock's report of the satisfactory operation (e.g. starting the engine from… | ||
| scan0285 | Return of Watford Magnetos with Continuous Cam Rings, machine numbers 100096/7. | ||
| View original record | EFC. X7791 Mx/McM8/T22.5.28. EW.6. Watford Magnetos with Continuous Cam Rings With reference to EFC2/T21.5.28, as requested in your memo, Machines Nos.100096/7 are returned to you herewith. | ||
| scan0286 | Three non-standard Watford Magnetos, requesting they be sent for inspection to identify modifications. | ||
| View original record | ROY/[strikethrough] EFC. X7791 BY10/G.22.5.28. WATFORD MAGNETOS. ----------------------- I understand that you have three Watford Magnetos in the Stores which differ from the standard type in some… | ||
| scan0287 | The loan of three specific magnetos to the Experimental Fighting Cocks (EFC) department for reporting purposes. | ||
| View original record | X7791 Inspection Dept. c. to EFC. Roy/Dnl/BH23.5.28. Will Inspection Dept. please pass to EFC. 3 H.W.6. Magnetos Nos. 107817, 107818, and 107820, at present lying in Receiving Stores, and included on… | ||
| scan0288 | The inspection of three Watford magnetos and sending them to the Test Department. | ||
| View original record | X.7791 To BY. from EFC. c. Mx. c. Roy/Dm. EFC3/T24.5.28. EW6. WATFORD MAGNETOS. Referring to your EY10/G22.5.28, these three magnetos have now been received and inspected by us. As suspected, these… | ||
| scan0289 | Request to implement an improved one-piece cam for the E.W.6 magneto into production. | ||
| View original record | ROY. C. Mx. C. Hs. C. EFC. C. BY/CS. X7791 BY2/G.25.5.28. E.W.6. MAGNETOS. --------------- Will you kindly note that after examining all the experimental work which has been so far carried out on the… | ||
| scan0290 | Replacement of a Watford EW6 magneto on engine 12-EX due to cold start issues. | ||
| View original record | To RHC. from EFC. X7791 EFC1/T31.5.28. The Watford EW6 magneto No.105333 on 12-EX will not start the engine cold. We therefore wish to replace it with magneto No.100082 which we hand you herewith.… | ||
| scan0291 | The return of three Watford EW6 magnetos. | ||
| View original record | X7791 To Hs/CEP. Rpy/Dn. -------- EFC1/T4.6.28. WATFORD EW6 MAGNETOS. We have three of these magnetos Nos.100081, 100094 and 1005333 which not requiring any longer we suggest should be returned to… | ||
| scan0292 | Examination report on a noisy Watford EW6 magneto which was found to have worn contact breaker platinum points. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. To E7C Order No. WC109 Customer's No. X 7791 Watford EW6 magneto No 100081. This magneto has recently completed over 10000 miles running on 15EX and has been returned to… | ||
| scan0293 | Report comparing the performance of Lucas and Watford magnetos on 40/50 HP Phantom chassis. | ||
| View original record | To R. from Hs/AJL. c. to BJ. Wor. c. to E. DA. c. to BY. X7791 Hs/AJL1/LG16:6.28. MAGNETOS ON 40/50 HP. CARS. X7791 Below we give particulars of the behaviour of the various magnetos at present… | ||
| scan0294 | Continued note comparing the noise levels of Lucas, E.W.6, and E.O.6 magnetos. | ||
| View original record | contd :- -2- Our impression is that the Lucas magnetos when new are quite quiet but develop noise during service - there are exceptions to this, of course - viz: the magneto on 7-EX, but on the other… | ||
| scan0295 | Correction to a report on the performance of a Watford magneto fitted to a 40/50 HP car, model 14-EX. | ||
| View original record | To R. From Hs/AJL. c. to BJ. Wor. c. to E. DA. c. to BY. Hs/AJLL/LG18.6.28. MAGNETOS ON 40/50 HP. CARS. Correction : In Hs/AJLL/LG18.6.28: the report of the magneto on 14-EX should read as follows :-… | ||
| scan0296 | The despatch of three Watford EW6 magnetos for repair and updating. | ||
| View original record | X7791 To Roy/Mr.Whitfield. c. Despatch Stores. EFC1/T18.6.28. WATFORD EW6 MAGNETOS. We are sending into the Stores to awaiting O.O. instructions for despatch, three Watford EW6, magnetos Nos. 100081,… | ||
| scan0297 | Comparing the performance of Watford and Lucas magnetos for cars and Thomson-Houston for aero engines. | ||
| View original record | EFC. ) from R. Hs. ) Ev. ) c. to BJ. Wor. Rg. RL/M21.6.28. MAGNETOS. X.7791. X.8793. CAR. Mr. Lidsey's report on Phantom experimental cars says that Watford magnetos are quiet, while Lucas are noisy.… | ||
| scan0298 | Noise levels of Watford Magnetos (Type EW.6) fitted with new continuous cam rings. | ||
| View original record | To R. from EFC. c. BJ. Wor. RG. c. EY. X7791 EFCl/T25.6.28. WATFORD MAGNETOS, TYPE EW.6. Your ref. R1/M21.6.28. With the exception of the machine on 14-EX (see Hs/AJL1/LG18.6.28), all the EW6. Watford… | ||
| scan0299 | From EFC to Hs/AJL regarding the replacement of magneto No. 100080 with No. 100097. | ||
| View original record | v7791 To Hs/AJL. from EFC. EFC1/T4.7.28. With reference to your note re magnetos, we think magneto No.100080 which you have put on 9-EX should now be replaced by magneto No.100097 of the continuous… | ||
| scan0300 | Dispatch of an experimental magneto for modification. | ||
| View original record | V5791 To Roy. from EFC. EFC1/T5.7.28. We send you herewith Watford EW6 magneto No.100080. This is the last remaining one of our experimental machines not fitted with a continuous cam ring. We should… | ||
| scan0301 | Letter from North & Sons, Ltd. to Rolls-Royce Ltd. regarding an E.W.6 armature. | ||
| View original record | H.E.W. X.7791 THE BRITISH MADE Watford SPEEDOMETERS MAGNETOS NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. CONTRACTORS TO THE ADMIRALTY, WAR… | ||
| scan0302 | Instruction to the Works to accept five overhauled Watford E.W.6 magnetos suitable for production. | ||
| View original record | X7791 To Roy/Dn. from Hs/CEP. c. to EFC. Hs/CEP3/BE13.8.28. RE: WATFORD E.W.6. MAGNETOS Will you kindly issue instructions to the Works to accept 5. Watford E.W.6. Magnetos Nos. 99802, 105302, 100080,… | ||
| scan0303 | Electrical experimental record sheet for a Watford EWG magneto, tracking testing and modifications. | ||
| View original record | X7791. Watford EWG magneto No 105302. ELECTRICAL EXPERIMENTAL RECORD SHEETS. Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. | Total miles.… | ||
| scan0304 | Electrical experimental record sheet for a Watford EW6 Magneto, No 100094. | ||
| View original record | X7791 X7791. Watford EW6 Magneto No 100094. ELECTRICAL EXPERIMENTAL RECORD SHEETS. Date on. | Location. | Date off. | REMARKS. | Miles reading Start. | Miles reading Finish. | Miles covered. | Total… | ||
| scan0305 | Electrical experimental record sheet for a Watford EWG magneto, serial number Na100081. | ||
| View original record | X7791 ELECTRICAL EXPERIMENTAL RECORD SHEETS. X. No: - 7791 Watford EWG magneto Na100081. on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. | Total… | ||
| scan0306 | Electrical experimental record sheet for a Watford EWG magneto, serial number 100080. | ||
| View original record | X7791 ELECTRICAL EXPERIMENTAL RECORD SHEETS. X. No:- 7791 Watford EW6 magneto No.100080. Table columns: on., Location., Date off., REMARKS., Miles reading start., Miles reading finish., Miles… | ||
| scan0307 | Comparative analysis of a Bosch FU6R magneto with a Watford EW6 magneto. | ||
| View original record | To R. from EFC. c. BJ. E. Ds. c. EY. Wor. BOSCH TYPE FU6R MAGNETO. (In comparison with Watford EW6. Magneto) The Bosch FU6R magneto has been shown in parts to Mr. North, and subsequently we have… | ||
| scan0308 | Comparison of Bosch and Watford armatures, including windings, insulation, and magnet pole piece design with a sketch. | ||
| View original record | Contd. -2- It will be noted that all the resistances and inductances of the Bosch armature are greater than those of the Watford. In comparing the two armatures before unwinding, what strikes one… | ||
| scan0309 | Continued report page discussing the design of Watford EW6 magneto pole pieces and comparing them to Bosch. | ||
| View original record | -3- Contd. The Watford EW6. magneto pole pieces are only stepped on the trailing edge, as in sketch :- Another point is that the core section of the Bosch is more nearly circular than the Watford,… | ||
| scan0310 | Comparison of the electrical properties and core sections of Bosch FU6R and Watford EG6 magneto armatures. | ||
| View original record | EFC. WD.5. 20.8.28. R. BOSCH FU6R AND WATFORD EG6 MAGNETO ARMATURE COMPARISONS. We have now been able to obtain comparative figures of these two armatures, and also winding and core particulars of the… | ||
| scan0311 | Comparison of Bosch and Watford armature windings, including diagrams and analysis of materials and construction. | ||
| View original record | -2- Contd. If the Watford section was made more circular or oval, little or none of the iron section would be lost, but the dimension A would be shorter and thus more wire could be got on the core in… | ||
| scan0312 | Letter to Messrs. North & Sons regarding a comparison report on Bosch and Watford magneto armatures. | ||
| View original record | X7791 EFCL/T. 22nd. August, 1928. Messrs. North & Sons, Whippendell Road, Watford. Dear Sirs, Bosch FU6R Magneto. X4568 We are now sending you a copy of a report we have issued on the comparison of… | ||
| scan0313 | Instruction sheet detailing the test results of a Watford EW6 magneto, noting incorrect rotor markings and a minor brush squeak. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.7C Order No.: WD8 Customer's No.: X7791 Watford EW6 magneto No 118864 with R.H. rotation for S.S.M. engine. We have… | ||
| scan0314 | Letter to Messrs. North & Sons Ltd. regarding incorrect rotation markings on a Watford magneto distributor rotor. | ||
| View original record | X7791 EFC3/T. 8th Sept. 1928. Messrs. North & Sons Ltd., Whippendell Road, Watford. Dear Sirs, With reference to the specially ordered R.H. EW6 Watford magneto No.113864, we note you have provided… | ||
| scan0315 | Replacement Watford EW7 magneto, noting its incorrect rotor timing marks for an S.S. engine. | ||
| View original record | X 7791 To RHC. from EFC. c. Hs/AJL. EFC4/T8.9.28. WATFORD EW6 MAGNETO No.113864. Herewith we hand to you Watford EW7 magneto. This magneto is a specially obtained one of R.H. rotation for the S.S.… | ||
| scan0316 | Letter from North & Sons Ltd. regarding the re-engraving of a magneto arm or the supply of a new one. | ||
| View original record | X7791 SPEEDOMETERS THE BRITISH MADE Watford MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE… | ||
| scan0317 | Confirming approval to re-mark a Watford EW6 Magneto to suit engine timing. | ||
| View original record | To. RHC. from EFC. c. Hs/AJL. X7791 EFC3/T17.9.28. WATFORD EW6 MAGNETO NO.113864. Further to our EFC4/T8.9.28 under cover of which we handed to you this magneto of R.H. rotation for the S.S. engine,… | ||
| scan0318 | Noisy Watford EW6 magneto being returned for correction. | ||
| View original record | To Roy. from EFC. c. Despatch Stores. X7791 EFC4/T1.10.28. WATFORD EW6. MAGNETO. We are sending into the Stores Watford EW6. magneto No.106012. This was the first one experimentally received by us… | ||
| scan0319 | Query to Messrs. North & Sons Ltd. about experiments with various brush grades to minimise squeaks on EW6 magnetos. | ||
| View original record | V7791 c. BY. c. Mx. c. Mailing. EFCL/T. 20th Sept., 1928. Messrs. North & Sons Ltd., Whippendell Road, Watford. Dear Sirs, EW6. Magneto - H.T. brush squeaks. There is, in our Test Dept., a minor… | ||
| scan0320 | Burnt-out contact breaker from an EW5 magneto after low mileage. | ||
| View original record | To Roy. from EFC. V7791 EFC3/T11.10.28. Herewith we hand to you a contact breaker from EW5 magneto No.100081. The contacts of this contact breaker have burnt down after running only 3900 miles on one… | ||
| scan0321 | Extract of a letter to Messrs. North & Sons Ltd. regarding a report on a Lucas type ER6 magneto with tungsten points. | ||
| View original record | X7791 EFC2/T. Extract X6793 23rd October 1928. Messrs. North & Sons Ltd., Whippendell Road, Watford. Dear Sirs, The following is a copy of my assistant's report concerning a Lucas type ER6 magneto,… | ||
| scan0322 | Letter from North & Sons, Ltd. regarding H.T. Brush squeaks in an E.W.6 Magneto. | ||
| View original record | X7791 Motor Cycle & Cycle Show Nov. 5-10 OLYMPIA Gallery Stand No. 198 THE BRITISH MADE Watford & MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON AEROMAGS… | ||
| scan0323 | Reply received about EW6 magneto H.T. brush squeaks. | ||
| View original record | To Mx. from EFC. c. By. X.7791 EFCl/T24.10.28. In answer to my letter EFCl/T. of the 20th September addressed to Messrs. North's (copy Mx. By) on the question of EW6. magneto H.T. brush squeaks, I… | ||
| scan0324 | Disagreeing with Messrs Norths' assessment on when brush squeaks occur in EW.6 magnetos. | ||
| View original record | EFC. o/By. from Mx. X7791 Mx17/T30.10.28 re EW.6. Magnetos With reference to EFC1/T24.10.28 and the letter from Messrs Norths. We do not agree with Messrs Norths that the brush squeaks only occur when… | ||
| scan0325 | Letter to North & Sons Ltd. disputing the cause of H.T. brush squeaks on EW6 magnetos. | ||
| View original record | X7791 EFC1/T. 2nd November, 1928. Messrs. North & Sons Ltd., Whippendell Road, Watford. Dear Sirs, We duly received yours ref. CHK/HWJ. of the 23rd ult., in answer to ours of Sept. 20th, relating to… | ||
| scan0326 | Letter from North & Sons Ltd. regarding a damaged magneto contact breaker due to petrol vapour. | ||
| View original record | X1791 COPY. NORTH & SONS LIMITED. WHIPPENDALL ROAD WATFORD. Your Ref.- ROY10/MG12.10.28. 5th November 1928. Messrs. Rolls-Royce Ltd., Nightingale Road, DERBY. Dear Sirs, In reply to your letter of… | ||
| scan0327 | Letter from North & Sons, Ltd. acknowledging a report of squeaking H.T. brushes in E.W.6 magnetos. | ||
| View original record | X7791 SPEEDOMETERS THE BRITISH MADE Watford & MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, CROWN AGENTS FOR THE COLONIES, INDIA OFFICE. TELEPHONES:… | ||
| scan0328 | Letter regarding the failure of a Contact Breaker from a Magneto, with an enclosed report from the makers. | ||
| View original record | X7791 EFC. ROY/JTll/HP6.11.28. Upon receipt of yours EFC3/T1.10.28 respecting failure of Contact Breaker removed from EW6 type Magneto No.100081, we duly returned this to makers for their examination… | ||
| scan0329 | Letter concerning a failed Watford EW6 magneto on chassis 10-EX due to potential petrol vapour ingress. | ||
| View original record | To Hs/GWH. from EFC. X7791 EFC1/T7.11.28. EW6. MAGNETOS. With reference to Watford EW6 magneto No.100081, which failed on chassis 10-EX due to faulty contact breaker points, having taken up this… | ||
| scan0330 | Correspondence regarding a squeaking H.T. brush on an EW6 Magneto. | ||
| View original record | X7791 To Mx. from EFC. EFC2/T7.11.28. EW6. MAGNETO - H.T. BRUSH SQUEAKS. Further to our EFC1/T24.10.28 and your reply Mxl7/T30.10.28, we have brought your reply to the notice of Messrs. Norths and… | ||
| scan0331 | Potential cause of a magneto failure due to engine cleaning methods. | ||
| View original record | EEC. from GWH. X7791 7.11.28 Re your EFCL/T7.11.28. I personally have not seen the magneto referred to and consequently cannot form an opinion of the cause of the failure. I am inclined to agree that… | ||
| scan0332 | Letter to Messrs. North & Sons Ltd. regarding a damaged contact breaker, confirming the cause and arranging repair. | ||
| View original record | X7791 EFC1/T. 8th November, 1928. Messrs. North & Sons Ltd., Whippendell Road, WATFORD. Dear Sirs, We duly received your letter of the 5th inst. ref. CHK/HWJ. relating to a contact breaker which you… | ||
| scan0333 | Repair order for a damaged EW6 contact breaker. | ||
| View original record | X7791 To Roy. from EFC. EFC3/T8.11.28. Would you please send to Messrs. Norths an order for the repair of an EW6 contact breaker at present in their hands, which became damaged on one of our expl.… | ||
| scan0334 | Faulty EW.6 Magneto (No. 113996) that is knocking and has squeaky H.T. brushes. | ||
| View original record | Y7791 EFC. from Mx. Mx7/T9.11.28 re EW.6. Magneto - H.T.Brush Squeaks [STAMP: RECEIVED 8 NOV] With reference to your memo EFC2/T7.11.28. We have sent into the Stores for return to the Makers EW.6.… | ||
| scan0335 | Production inspection and test specification for a Watford EW6 Magneto for an S.S. Chassis. | ||
| View original record | To BY. from EFC. c. Mr. Brock. c. Mx. X7791 EFC4/T21.12.28. WATFORD EW6 MAGNETO FOR S.S. CHASSIS Herewith please find copy of Specification of Production Inspection and Test in connection with the… | ||
| scan0336 | Inspection procedure for the Watford Type ZRS Magneto for the P.H. 40/50 HP S.S. Chassis. | ||
| View original record | X.7791. WATFORD TYPE ZRS MAGNETO FOR P.H. 40/50 H.P. S.S. CHASSIS (R.H. ROTATION) X.7781m. (1) The contact breaker cover, distributor block and rear end coverplate shall be removed and the following… | ||
| scan0337 | Page two of a document detailing test procedures for a magneto and its associated 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… | ||
| scan0338 | Testing procedures and performance specifications for a magneto, detailing running observations and minimum sparking speeds. | ||
| View original record | -3- It should be further observed whilst running the magneto slowly that :- (a) The meshing of the distributor gear wheel with the pinion is correct, incorrect meshing being indicated by an uneven… | ||
| scan0339 | The examination of magneto points after 6242 miles, noting wear and cleaning of the distributor. | ||
| View original record | X7791 Extract from RJAL/C.28.12.28 (X.7780) MAGNETO X.7791 18-EX Points were examined at 6242 miles reading and were found clean and good, but with the unusual feature of a slight depression on the… | ||
| scan0340 | Repeated failure of a Watford EW6 magneto and a request to return it to the manufacturer. | ||
| View original record | Roy. from EFC. X7791 EFCl/T29.1.29. WATFORD EW6 MAGNETO NO.100081. Herewith we again hand you this magneto which has again failed in its contact points. It will be remembered that the previous failure… | ||
| scan0341 | Misfiring issue and worn contact points concerning a Watford EW6 Magneto from experimental chassis 10-EX. | ||
| View original record | COPY EFC. WD. 31. 29.1.29 WATFORD EW6 MAGNETO No.100081. This magneto has been removed from expl. chassis 10-EX owing to a complaint of bad misfiring. The history of this magneto has been very… | ||
| scan0342 | Instruction regarding the failure and replacement of Watford EW6 magnetos due to worn contact points. | ||
| View original record | RR 238 (150 BKS.) (OB 461-8-12-24) MP 306975 X7791 ROLLS-ROYCE LTD. INSTRUCTIONS. 8 - 2 - 1929 To E.T.C. Order No. WD 34 Customer's No. X7791 Watford EW6 magnetos. With reference to the failure of… | ||
| scan0343 | Inquiring about premature failure of Watford EW6 magneto contact breaker points. | ||
| View original record | Typed Text: To | ||
| scan0344 | Premature failure of Watford EW6 magneto contact breaker points due to an incorrect spring design. | ||
| View original record | X7791 To ROY. from EFC. c.c. BY. EFC4/T9.2.29. WATFORD EW6 MAGNETOS. We hand you herewith a contact breaker from an EW6 magneto, the platinum points of which have burnt away prematurely after only… | ||
| scan0345 | Inquiry regarding evidence of premature failure of Watford EW6 magneto contact breaker points. | ||
| View original record | To Hm/NRC. from EFC. X7791 EFC3/T9.2.29. WATFORD EW6 MAGNETOS. We should be pleased to know if you have as yet any evidence of premature failure of EW6 magneto contact breaker points. On experimental… | ||
| scan0346 | Correspondence regarding a returned Contact Breaker from a Watford EW6 type Magneto and the subsequent report from Messrs. North. | ||
| View original record | x7791 EFC. ROY/JT1/HP25.2.29. Watford EW6 type Magnetos. Upon receipt of yours EFC4/T9.2.29, we duly returned to Messrs. North's the Contact Breaker from one of the above machines, together with an… | ||
| scan0347 | Letter from North & Sons Ltd. regarding damage to magneto contact breaker points caused by petrol vapour combustion. | ||
| View original record | COPY. NORTH & SONS LTD. WHIPPENDELL ROAD WATFORD. -------- Your Ref.- ROY/JT5/HP. Our Ref.- HWJ/V3. 21st February 1929. Messrs. Rolls-Royce Ltd., Derby. Dear Sirs, We thank you for your letter of the… | ||
| scan0348 | Examination report on a complaint regarding a Watford EW6 type Magneto, No. 100081. | ||
| View original record | EFC. X7791 ROY/JT3/HP22.2.29. Watford EW6 type Magneto No.100081. Reverting to your memo EFC1/T29.1.29 respecting complaint in connection with the above machine. Messrs. North & Sons Ltd. have now… | ||
| scan0349 | Cause of combustion evidence in a Watford EW6 Magneto. | ||
| View original record | ROY/JT. from EFC. Y7791 EFC2/LG25. 2. 29. WATFORD EW6. MAGNETO NO.100081. Re. your ROY/JT3/H22. 2. 29. We are inclined not to agree with Messrs. North as to the cause of the trouble. Before allowing… | ||
| scan0350 | Instruction regarding a noisy Watford magneto returned from experimental chassis 10EX after 1000 miles. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. To: E & C Order No.: WD47 Customer's No.: X7791 Watford EW6 magneto. No. 99802. This magneto has been returned to us off expl chassis 10EX with a complaint that the… | ||
| scan0351 | Premature failure and chemical analysis of a Watford EW6 magneto contact breaker. | ||
| View original record | X7791 To Roy/JT. from EFC* EFC2/T25.3.29. WATFORD EW6 MAGNETO CONTACT BREAKER FAILURES Further to your enquiry regarding the Watford magneto contact breaker which had prematurely failed on one of the… | ||
| scan0352 | Faulty Watford EW6 magneto returned due to noisy and knocking distributor gears. | ||
| View original record | X7791 Roy. from EFC. EFC1/T26.3.29. WATFORD MAGNETOS. Herewith we hand you Watford EW6 magneto No.99802. This has been returned to us from an expl. chassis with the complaint of noisy and knocking… | ||
| scan0353 | Letter from North & Sons, Ltd. about an alteration to the electrical performance of E.W.6 Magnetos. | ||
| View original record | E7C H.E.W. X7791 SPEEDOMETERS THE BRITISH MADE Watford MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS, 422 & 423 WATFORD. TELEGRAMS: AEROMAGS WESTCENT… | ||
| scan0354 | Communication regarding a quote from North & Sons Ltd. for the repair of Magneto No. 99802. | ||
| View original record | EFC. c. to C/WFH. (Strikethrough) XJSS (Handwritten, strikethrough) X7791 (Handwritten) ROY/JT5/HP16.4.29. Our Replacement Order R.7669. We have now heard from Messrs. North & Sons Ltd. respecting… | ||
| scan0355 | Test results log for E.W.6 magnetos, comparing performance across nine different armatures. | ||
| View original record | E.W.6. MAGNETO. X7791 [TOP TABLE] Headers: Armature, Plat., N.o1, Tung, Plat., N.o2, Tung, Plat., N.o3, Tung, Plat., N.o4, Tung., Plat., N.o5, Tung. Row: High speed Data: 5,000 | Miss 800 -3,500 ok… | ||
| scan0356 | Specification table for various core sections and windings. | ||
| View original record | X7791. CORE Nᵒ Core Section | Primary Winding | Secondary winding | Standard Section 1.000 x .468 1 | Standard | 127 | 8,000 | A core section '960" x 385" 2 | " | 160 | " | B core section '906" x 353"… | ||
| scan0357 | Test results table for E.W.6 Magneto with different numbered armatures. | ||
| View original record | E.W.6. Magneto. X7791 Armature | N°2 | N°8 | No1 | N°1 | N°7 | 17° R.p.lot. | 17° R.p.lot. | 10° R.p.lot. | 17° R.p.lot. | 17° R.p.lot. High speed | 5000 | 5,000 | 5,000 | 5,000 | Low speed (A) | 70 |… | ||
| scan0358 | Meeting to discuss the development and issues with Watford EW6 magnetos. | ||
| View original record | X7791 16.4.29. WATFORD EW6 MAGNETOS. X7792 Messrs. Kirby, Allen and North visited us today. Amongst other things the question of EW6 magnetos was discussed. Mr. Allen stated that they were producing… | ||
| scan0359 | The ineffectiveness of ventilation in reducing noise or preventing the burning of contact breaker points. | ||
| View original record | -2- but the amount of ventilation provided appears so far to have made very little difference either in noise or in its effect on the burning away of the contact breaker points. E.F.C. EFC. | ||
| scan0360 | Complaint about a noisy Watford EW6 Magneto with knocking gears after 1000 miles, requesting replacement parts free of charge. | ||
| View original record | X7791 Roy/JT. from EFC. EFC2/T18.4.29. WATFORD EW6 MAGNETO NO.99802. -Roy/JT5/HP16.4.29.- Our complaint of this machine was of noisy and knocking gears after having run 1000 miles. We were, and are,… | ||
| scan0361 | Proposal to order improved and ventilated magnetos from Messrs. North & Sons for the 40/50 HP and 20 HP chassis. | ||
| View original record | O.O. c. Hs. c. EFC. c. Mx. X 7791 Ry14/G18.4.29. X 7792 X 7790. CHASSIS MAGNETOS. Messrs. North & Sons have developed improvements in both types of their magnetos which we use on chassis. We therefore… | ||
| scan0362 | Instruction sheet regarding a faulty Watford EW6 magneto removed from an S.S. engine due to a developing knock. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To E. & C. Date: 29-4-1929 Order No. WD59 Customer's No. X 7791 Watford EW6 magneto. NO 114788. R.H. This magneto has been… | ||
| scan0363 | Letter regarding the cost of repairs and modifications to Magneto No. 99802. | ||
| View original record | V7791 EFC. Roy/JTL/EH29.4.29. E.W.6. Watford Magnetos. Upon receipt of yours EFC2/T18.4.29, we duly communicated with Messrs. North & Sons Ltd., regarding the cost of repairs to Magneto No. 99802, and… | ||
| scan0364 | Return of a faulty Watford EW6 magneto due to fouling of the armature. | ||
| View original record | X.7791 EFC4/T29.4.29. To Roy. from EFC. c. Despatch stores. WATFORD EW6 MAGNETOS. We are sending into the stores an EW6 Watford magneto No.114788, which has been removed from an S.S. test bed engine… | ||
| scan0365 | Authorising an order for work on an EW6 Watford Magneto. | ||
| View original record | X7791 To Roy/JT. from EFC. EFC2/T30.4.29. EW6 WATFORD MAGNETO NO.99802. Further to your Roy/JTL/BH29.4.29 we are of the opinion after reading Messrs. North's explanation, that we should agree to their… | ||
| scan0366 | Note on the material used for gears in the Watford EW6 magneto. | ||
| View original record | X7791 EFC. 30.4.29. The gears, both pinion and wheel, in the Watford EW6 magneto are made of bakelite. HEW. | ||
| scan0367 | Letter to Messrs. R.B. North & Sons requesting an update on modifying an RW6 magneto for trial on experimental cars. | ||
| View original record | X-1791 c. Roy. c. Mailing. EFC2/T. 14th May, 1929. Messrs. R.B. North & Sons, hippendell Road, WATFORD. Dear Sirs, During the visit of your Messrs. Kirby, Allen and North recently the question of the… | ||
| scan0368 | Inquiry regarding the delivery of Watford EW6A magnetos and the development status of a 20 HP sleeveless type magneto. | ||
| View original record | X7791 Roy. from EFC. EFC3/T14.5.29. WATFORD EW6 MAGNETOS. X5790 Referring to Ey14/G18.4.29 we should be pleased to know if the six EW6A magnetos with improved windings and ventilated low tension… | ||
| scan0369 | Requesting an alteration to the lower speed sparking figures for Watford EW6 magnetos. | ||
| View original record | X7791 To BY/CS. from EFC. EFC3/T17.5.29. WATFORD EW6 MAGNETOS. With reference to E.77481 of the standard EW6 magneto, would you please have the lower speed sparking figures altered to the following:-… | ||
| scan0370 | Receipt and distribution of chassis magnetos and related parts from North & Sons. | ||
| View original record | X4790 X7791 BY. c. to EFC. c. to HS. c. to Mx. Roy/Dnl/BH29.5.29. Chassis Magnetos. X5790 With reference to BY14/G18.4.29, we yesterday received from North & Sons, 6 - E.W.6.A. R.H. Magnetos Bearing… | ||
| scan0371 | Failed contact breaker from a Watford EW6 magneto on experimental chassis 12-EX. | ||
| View original record | X7791. Roy. from EFC. EFC absent EFC2/AD10.6.29. We hand you herewith, contact breaker removed from Watford EW6 magneto No.100082 off experimental chassis 12-EX which has only done 2,000 miles. The… | ||
| scan0372 | The testing and approval of B.W.6 magneto contact covers. | ||
| View original record | X7791 c EFC ✓ Mx1/T11.6.29 RE MAGNETOS With reference to the B.W.6. magneto contact covers supplied to us for test in accordance with Hy14/G 18.4.29. These have been tried on a number of chassis, they… | ||
| scan0373 | Rapid wear of platinum contact breaker points in Watford E.W.6 magnetos and suggesting design improvements. | ||
| View original record | X7791 Roy. from EFC/HEW. c. Hy. EFC is absent EFC/HEWl/ADL 3.6.29. X.7791. WATFORD E.W.6. MAGNETOS. We hand you herewith, another contact breaker removed from an E.W.6 magneto on one of our… | ||
| scan0374 | Investigation into the unsatisfactory performance and rapid burning of platinum points on the Watford E.W.6 magneto. | ||
| View original record | R. from EFC/HEW. c. Sg. c. Ev. Wor. X7791 EFC is absent EFC/HEW/AM4.6.29. X.7791. WATFORD E.W.6. MAGNETO. We are not satisfied with the performance of the platinum points on the Watford E.W.6 magneto.… | ||
| scan0375 | Testing Lucas magnetos with tungsten points. | ||
| View original record | contd. -2- We should like to see them experiment more with tungsten points, which are much less susceptible to burning away. Some of the Lucas magnetos we tested some time ago, gave very satisfactory… | ||
| scan0376 | Examination and repair of a Watford E.W.6 magneto. | ||
| View original record | Roy. from EFC/HEW. c. Ey. X7791 EFC is absent EFC/HEW2/ADL.4.6.29. X. 7791. WATFORD E.W.6. MAGNETOS. With reference to our EFC/HEW1/ADL 3.6.29, we hand you herewith, for Messrs. North's examination… | ||
| scan0377 | The repair of Magneto No. 114788, which has a knocking noise in the gears. | ||
| View original record | X7791 EFC. c. to G/WFW. ROY/JT24/HP19.6.29. Re Magneto No.114788. Further to yours EFC4/T29.4.29 re repairs to Magneto above mentioned. Messrs. North's point out that this machine has been examined,… | ||
| scan0378 | The rectification and return of a Magneto contact breaker and feedback on new ventilated covers. | ||
| View original record | X7791 EFC. ROY/JT4/HP. 24th June 1929. Further to yours EFC2/AD10.6.29 re rectification of Contact Breaker belonging to Magneto No.100082 ex chassis 12-EX. Messrs. North & Sons point out that this… | ||
| scan0379 | Letter from North & Sons, Ltd. regarding the delivery schedule for 3 model R.O.1 magnetos. | ||
| View original record | X7791. See our Exhibit at the INTERNATIONAL AERO EXHIBITION OLYMPIA LONDON W. JULY 16-27. THE BRITISH MADE Watford & MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEGRAMS: AEROMAGS… | ||
| scan0380 | Request to obtain two new contact breaker levers and screws with platinum contacts for Watford EW6 magnetos. | ||
| View original record | X7791 Roy. from EFC. EFC1/ADL.7.29. Will you please obtain for the Electrical Experimental Laboratory, from Messrs. North & Sons, two new contact breaker levers and screws fitted with platinum… | ||
| scan0381 | Letter from North & Sons Limited regarding damaged contact breaker points due to petrol vapour combustion. | ||
| View original record | X7791 COPY. NORTH & SONS, LIMITED. WHIPPENDELL ROAD, WATFORD. Ref. HPB/Q. Roy/Dn15/EH. 3rd July, 1929. Messrs. Rolls-Royce Ltd., DERBY. Dear Sirs, In reply to your letter of the 24th ult, we beg to… | ||
| scan0382 | Contact Breaker removed from an E.W.6 Magneto on Experimental Chassis 14-EX. | ||
| View original record | X7791 EFC. c to EX. [struck through] Roy/Dn5/EH4.7.29. With reference to your EFC/HEW1/AD13.6.29, regarding the Contact Breaker removed from an E.W.6. Magneto fitted to Experimental Chassis 14-EX. The… | ||
| scan0383 | Test results for a Watford EW.6 Magneto, showing short circuit current at various speeds. | ||
| View original record | X7791 19.7.29. WATFORD EW.6 MAGNETO NO.99802. Speed Short circuit amperes. % of that at 3200 r.p.m. 100 .58 20.8 200 1.15 41.3 300 1.65 59.3 400 1.93 69.5 600 2.20 79.2 800 2.35 84.5 1200 2.52 90.7… | ||
| scan0384 | Comparing the features of Watford EW6A magnetos against the standard EW6 type. | ||
| View original record | R. from EFC. c. Sg. c. By c. E. DA. Wor. x7791 EFC1/AD20.7.29. WATFORD EW6A MAGNETOS. x7791 x7792 The principal features of the above magnetos as compared with the present standard EW6 type are (a)… | ||
| scan0385 | The testing and performance of EW6 magnetos for experimental chassis. | ||
| View original record | -2- contd. Messrs. North, Mr. Allen stated that they were producing an EW6 magneto with a better low speed performance, having increased the total cross sectional conductance of the primary winding… | ||
| scan0386 | Road and bench testing of experimental magnetos, detailing performance variations and starting issues. | ||
| View original record | -3- contd. "for road testing, and another No.118716 was fitted to a test bed engine for the purpose of obtaining power curves with the increased magneto advance. The remaining two magnetos were tested… | ||
| scan0387 | The performance and endurance testing of magnetos, comparing EW6A, standard EW6, and R.Bosch models. | ||
| View original record | -4- contd. "The high speed fully advanced performance was also tried on this chassis, with the magneto hot, with equally satisfactory results, no misfiring being recorded. "Of the two magnetos tested… | ||
| scan0388 | Trouble with platinum points on EW6 and EW6A magnetos and proposed solutions. | ||
| View original record | -5- contd. results in much better low speed sparking without increasing the maximum energy of spark at the higher speeds. Owing to the fact that there has been some trouble on experimental cars with… | ||
| scan0389 | Letter to Messrs. North & Sons regarding the performance of type LW6A magnetos. | ||
| View original record | X7791 C. By C. Roy C. Mailing EFC2/AD. 22nd July, 1929. Messrs. North & Sons, Whipperndell Rd., WATFORD. Dear Sirs, We are so far very pleased with the bench and chassis performance of the six type… | ||
| scan0390 | Confirming a Watford EW6 magneto is being sent to the Repair Dept. Stores to credit an order. | ||
| View original record | X 7791. Roy/Dn. from EFC. c. Hm/CM. EFC1/AD26.8.29. We are sending into the Repair Dept. Stores a Watford EW6 magneto No.99802 in first class condition. Will you kindly credit Order No.54733 with this… | ||
| scan0391 | The status and allocation of four Watford EW6 magnetos for S.S. Production. | ||
| View original record | X7791 Roy/Dm. from EFC. c. G/Mt. EFC2/AD26.8.29. X.7791. WATFORD EW6 MAGNETOS FOR S.S. PRODUCTION. X.7792. We are handing to the Stores, four Watford EW6 magnetos numbered 114787, 114788, 114790, and… | ||
| scan0392 | Condition and despatch of four Watford E.W.6. magnetos from the Experimental Department. | ||
| View original record | ~~SFI.~~ ~~c. to G/Rb.~~ c. to EFC. X 7791 Roy/Dn4/EH29.8.29. In accordance with EFC2/AD26.8.29, 4 Watford E.W.6. Magnetos have been sent into Despatch Stores from Experimental Dept. No. 114788 is… | ||
| scan0393 | Letter to Messrs. North & Sons Ltd. regarding the lubrication frequency for the E.W.6 Magneto. | ||
| View original record | X7791. c. Mailing. EFC4/AD. 10th September, 1929. Messrs. North & Sons,Ltd., Whippendell Rd., Watford. Dear Sirs, Lubrication of E.W.6. Magneto. In our Phantom instruction book we have, in connection… | ||
| scan0394 | Discrepancy in timing markings for the E.W.6 magneto on S.S. chassis and suggesting an alteration. | ||
| View original record | X7791 By. from EFC. c. By/NHW. EFC3/ADL1.9.29. X.7791. TIMING MARKING OF E.W.6. MAGNETO FOR SS. CHASSIS On the S.S. cars it is understood that the timing datum for both battery and magneto ignition is… | ||
| scan0395 | Letter from North & Sons Ltd. concerning the lubrication of an E.W.6. Magneto and an instruction booklet alteration. | ||
| View original record | X7791 SPEEDOMETERS THE BRITISH MADE Watford & MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, CROWN AGENTS FOR THE COLONIES, INDIA OFFICE. TELEPHONES:… | ||
| scan0396 | Confirming a change to the lubrication instructions for the E.W.6 Magneto. | ||
| View original record | X7791 By/NHW. from EFC. EFC/ADL 2.9.29. X.7791. LUBRICATION OF E.W.6. MAGNETO As a result of our query with Messrs. North & Sons, concerning the monthly, in place of fortnightly instructions for the… | ||
| scan0397 | Query regarding the alteration of Watford Type EW6 magnetos for a U.S.A. model SS chassis. | ||
| View original record | X7791. By. from EFC. EFC3/ADL9.9.29. X.7791. WATFORD TYPE EW6 MAGNETOS OF R.H. ROTATION FOR U.S.A. MODEL OF SS. CHASSIS. We have three of these magnetos with us which we obtained sometime ago for the… | ||
| scan0398 | Suggestion to convert three R.H. rotation Watford type EW.6 magnetos to suit S.S. chassis production. | ||
| View original record | EFC. X7791 BY/Cgh15/G.17.10.29. WATFORD TYPE EW.6 MAGNETOS OF R.H. ROTATION. With reference to EFC3/AD.19.9.29. it seems very improbable indeed that we shall be called upon to build a L.H. chassis,… | ||
| scan0399 | Return of three R.H. rotation magnetos to be converted to standard L.H. rotation machines. | ||
| View original record | X7791. Roy. from EFC. c. G/Mt. EFC2/AD21.10.29. X.7791. WATFORD E.W.6. MAGNETOS OF R.H. ROTATION FOR L.H. CHASSIS. Herewith we hand to you three magnetos which were obtained of R.H. rotation for L.H.… | ||
| scan0400 | Requesting a report on the premature burning of platinum contact breaker points on magnetos. | ||
| View original record | X 7791. To Hm. from EFC. " Br. " Ps. " Pt. " H. EFC5/AD24.10.29. CONTACT BREAKER POINTS ON STANDARD MAGNETOS. On experimental chassis we appear to suffer now and again from premature burning away of… | ||
| scan0401 | Issue of platinum contact breaker points burning away on standard magnetos. | ||
| View original record | H.E.W. X7791 EFC. from Hm. Hm/HAW9/KW24.10.29. Contact Breaker Points on Standard Magnetos. Reference: EFC5/AD24.10.29. We have not had a sufficient number of platinum points burning away on magnetos… | ||
| scan0402 | Customer complaint about prematurely burnt out contact breaker points on a standard magneto. | ||
| View original record | Sèvres X7791. P/W "Hs/EFC" Ps4/RJ.28/10/29. Re: Contact Breaker Points on Standard Magnetos It is a coincidence that we should have received your memo EFC5/AD.24/10/29 at the moment when we were… | ||
| scan0403 | Response to an enquiry regarding the wear and lifespan of contact breaker points on standard magnetos. | ||
| View original record | X7291. S/W (EFC) H4/LH6.11.29. RE: CONTACT BREAKER POINTS ON STANDARD MAGNETOS. Replying to your EFC/5/AD24.10.29. Enquiries have been made from several of the Inspecting Engineers on the point you… | ||
| scan0404 | Recurring failures of Watford magnetos on Phantom I & II cars. | ||
| View original record | X7791 EFC. from Hs/AJL. C. By. C. E. C. Wor. Hs/AJL6/AD7.11.29. WATFORD MAGNETOS ON PHANTOM I & II CARS. We are constantly experiencing failures on the E.W.6. magnetos on Phantom I and II cars. The… | ||
| scan0405 | The premature burning of platinum points in Watford E.W.6 magnetos on Phantom I & II cars. | ||
| View original record | X7791. Hs. from EFC. c. Ev. c. E. c. Wor. EFC2/ADL1.11.29. X.7791. WATFORD E.W.6. MAGNETOS ON PHANTOM I & II CARS. Burning of platinum points. It is quite true that we have experienced a number of… | ||
| scan0406 | Troubleshooting E.W.6 magnetos with the supplier, Messrs. North, including experiments with different contact breaker points. | ||
| View original record | -2- It will be seen from the answers that up to the present at any rate, there has been an almost negligible amount of trouble in this direction though E.W.6. magnetos have now been delivered on cars… | ||
| scan0407 | Handling of a Watford EW6 magneto being sent to stores for overhaul. | ||
| View original record | X7791. Roy. from EFC. c. G/Mt. EFC8/AD20.11.29. X.7791. WATFORD EW6. MAGNETO We are sending into the Stores one Watford EW6. magneto No.I15304. Will you please have this magneto returned to Messrs.… | ||
| scan0408 | Requesting the repair of a Watford EW6 magneto removed from chassis 18-EX due to a bad knock. | ||
| View original record | Roy. from EFC. c. G/Mt. X7791 EFC4/AD10.12.29. X.7791. WATFORD EW6. MAGNETO. We are sending into the Stores a Watford EW6. magneto No.121777 which has been removed from chassis 18-EX owing to the… | ||
| scan0409 | Instruction on issues with Watford EWB magnetos during endurance tests, recommending a switch to jump spark distributors. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 X7791 ROLLS-ROYCE LTD. INSTRUCTIONS. 12-12-1929 To: E.T.C. Order No. WD 100 Customer's No. X7791/2 Watford EWB magnetos. In the course of endurance tests… | ||
| scan0410 | Responding to a query about contact breaker points on Watford E.W.6 magnetos and suggesting room for improvement. | ||
| View original record | pt.1./PH/30-12-29. EFC x7791 Hm. Derby. (Copy to Whr.London) I am in receipt of your memo EFC 5/A.D./24-10-29 re Contact Breaker points of standard magnetos, and in reply have to inform you that there… | ||
| scan0411 | The failure of a magneto on chassis 1-WJ, including quotes from the manufacturer. | ||
| View original record | COPY. X7791 N-S PN. A20/H20.6.30. RE - CHASSIS 1-WJ. X8783 In your PN2/WT4.6.30, you asked for as much information as possible regarding the failure of the magneto upon the above car. I think I cannot… | ||
| scan0412 | Magneto failure on trials car chassis no. 1-WJ. | ||
| View original record | S/W. X7791 EFC. from PN. PN1/WT23.6.30. Y X8783 CHASSIS NO. 1-WJ. I was anxious to know why the magneto recently on this trials car had failed, and have received the enclosed memo from A. Do you… | ||
| scan0413 | Potential magneto failure on Chassis 1-WJ and criticising a previous unsatisfactory explanation. | ||
| View original record | X7791 W/S. To PN. from EFC. EFC4/AD24.6.30. X.8783. CHASSIS 1-WJ. X.7791. In your note PNL/WT23.6.30 you enquire of us if we understand the paragraph which you have marked in red in memo A20/H20.6.30.… | ||
| scan0414 | Letter from a supplier discussing the function of a safety gap in a magneto and issues caused by excessive resistance. | ||
| View original record | X7791 .SPEEDOMETERS & MAGNETOS. THE BRITISH MADE Watford NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. CONTRACTORS TO THE ADMIRALTY, WAR… | ||
| scan0415 | Continuation sheet from North & Sons Ltd. discussing safety gap issues on Watford Magnetos. | ||
| View original record | NORTH & SONS Ltd. Continuation Sheet No.1 Messrs. Rolls-Royce Ltd. 9th July, 1930. If a safety gap is set so small that it takes care of steady overload then there will be so much leak in the form of… | ||
| scan0416 | Forwarding a letter from Messrs North & Sons regarding chassis 1 WJ. | ||
| View original record | X7791. A. is absent. A/H5/H.10.7.30. [Stamped] N-S. PN. re Chassis 1 WJ. -------- With reference to memo A17/H.1.7.30, we attach hereto letter dated the 9th inst. from Messrs North & Sons which should… | ||
| scan0417 | Extract from G.W. Hancock's report on the condition of the magneto on vehicle 24-EX at 6,000 miles. | ||
| View original record | X7791 Extract from G.W.Hancock's report dated 20.7.30 on24-EX at 6,000 miles. X7791 MAGNETO. The distributor and contact points are in good condition. It has remained fairly quiet. | ||
| scan0418 | Extract from G.W. Hancock's report on the magneto condition of car 24-EX after 10,000 miles. | ||
| View original record | X7791. Extract from G.W.Hancock's report dated 15.8.30 on 24-EX at 10,000 miles. MAGNETO The distributor and contact points were in good condition. X7791 | ||
| scan0419 | Internal request to order six Watford EW6 magneto distributor carbon brushes for experimental work. | ||
| View original record | X7791. Roy/Dn. from EFC. EFC3/AD14.1.30. Will you please order for us for replacement work on experimental magnetos, six Watford EW6. magneto distributor carbon brushes. EFC. | ||
| scan0420 | Extract detailing cost options for a 40/50 HP Magneto, comparing Iridio Platinum Points with Tungsten Points. | ||
| View original record | X 7791. Roy 2/MG22.1.30. Extract from X.5792. 40/50 HP. Magneto, i.e. Type L.W.6. (c) The large Irridio Platinum Points, which it was provisionally suggested may be necessary will cost an extra Per… | ||
| scan0421 | Experimental use and standardization of tungsten points for 40/50 HP magnetos, type E.W.6. | ||
| View original record | Roy. from EFC. c.c. Ry. c. Hs. X7791 EFC4/AD23.1.30. X.7791. 40/50 HP. MAGNETOS TYPE E.W.6. There is no question of the use of large irridio platinum points on these machines. Although we have run one… | ||
| scan0422 | Urgent dispatch of two magnetos, confirming one has been sent and the other will follow. | ||
| View original record | X7791 EFC. ROY/JT9/FS1.2.30. With reference to EFC7/AD23.1.30. and recent telephone message regarding the urgency of Magnetos Nos 118714/6. Kindly note Messrs North's have sent off today per passenger… | ||
| scan0423 | Production inspection and test log for a Watford Type SW6A Magneto. | ||
| View original record | X.8781m. WATFORD TYPE SW6A MAGNETO. X.7791 PRODUCTION INSPECTION AND TEST TABLE HEADERS: Date, Magneto No., (1) Remarks., (2) Range (degrees) >=64°, (3) Remarks., (4) Tangl. Force 1 to 2 lbs., (5)… | ||
| scan0424 | Confirmation of the return of a Watford E.W.6 magneto. | ||
| View original record | X7791. 6.3.30. Watford E.W.6. magneto No.118715 has been received back. EFC. | ||
| scan0425 | The overhaul of a Watford EW6 Magneto. | ||
| View original record | X7791. Roy. from EFC. c. G/Mt. EFC5/ADL3.5.30. X.7791. WATFORD EW6 MAGNETO NO.113864. We are handing to the Stores the above magneto. Will you please arrange for its return to Messrs.North for… | ||
| scan0426 | Repairing two failed contact breakers from Watford EW6 magnetos by replacing the platinum points with tungsten. | ||
| View original record | X7791. Roy. from EFC. EFC2/ADL4.10.30. X.7791. WATFORD EW6. MAGNETOS. We hand you herewith two contact breakers which have failed on experimental test bed engines due to the contact points burning… | ||
| scan0427 | Request for low-speed sparking figures for a specific Watford E.W.6 Magneto. | ||
| View original record | X7791. Sft/Mr. Ellis. from EFC. EFC5/ADL 4.1.31. X.7791. WATFORD E.W.6. MAGNETOS. Will you kindly let us have from your records the low speed sparking figures obtained on the production test of… | ||
| scan0428 | Investigation into a complaint about Watford EW6 magnetos causing starting difficulties and backward firing on a Phantom II engine. | ||
| View original record | E.7C. X.7791 Date 15-1-31 Ref. No WE 72. (see report EFC2/ADL 6.1.31) X.NOS. 7791 Watford EW6 magnetos. We had complaint made to us this week that the Phantom II engine is difficult to start from cold… | ||
| scan0429 | Magneto performance and timing, noting it fails the low speed sparking specification. | ||
| View original record | WE 72 contd. (2) virtually fully advanced. The figures obtained were as follows:- magneto run in normal direction. advance 110 r.p.m. central 165 " retard 270 " magneto run in reversed direction.… | ||
| scan0430 | Distributor dimensions and ignition timing calculations. | ||
| View original record | WE 72 contd. (3) Distributor dimensions taking the pitch as 1.000 (Actually 1.267") Make Ratio .58 Range .34 Forward overlap at full advance .16 ditto at full retard .50 Backward overlap at full… | ||
| scan0431 | Page of suggestions regarding distributor timing to prevent the engine from running backwards. | ||
| View original record | WE72. contd. (4.) at low speeds running backwards would be much less possible. As regards the distributor timing it might be possible (by increasing the backward overlap at full retard) to reduce the… | ||
| scan0432 | Circumstances of engine back-running when starting the P.2 engine by hand on magneto ignition. | ||
| View original record | X7791. To R. from EFC. c. Sg. Wor. c. Da. E. c. Hy. Hs. c. Hs/AJL. EFC2/ADL6.1.31. X.699. STARTING P.2. ENGINE BY HAND ON MAGNETO IGNITION. X.7791. X.6098. With reference to the second paragraph of… | ||
| scan0433 | Engine backward running issues related to magneto and distributor timing. | ||
| View original record | EFC2/AD16.1.31 contd. -2- In regard to firing the right cylinder to produce backward running, it may be remembered that as long ago as 1919 we produced a model contact breaker and distributor upon… | ||
| scan0434 | Out-of-spec low-speed sparking on a Watford E.W.6 magneto, causing starting difficulties. | ||
| View original record | Sft/Mr.Ellis. from EFC. X7791. EFCl/ADl 7.1.31. X.7791. WATFORD E.W.6. MAGNETOS. We have received your note of the 15th inst. with reference to magneto No.127221, the reason for our enquiry being that… | ||
| scan0435 | Letter concerning the return and timing issues of a Watford E.W.6. Magneto, including a tester's report on starting problems. | ||
| View original record | X7791 EFC1/AD. 19th January, 1931. X7791 X 6098 Messrs. North & Sons,Ltd. Whippendell Rd. Watford. Dear Sirs, Watford E.W.6. Magneto. We are arranging for the return to you of a magneto of the above… | ||
| scan0436 | Page 2 of a letter to Messrs. North & Sons, Ltd. regarding engine starting issues and magneto testing. | ||
| View original record | Messrs. North & Sons,Ltd. Whippendell Rd. Watford. 19th January, 1930. -2- the engine by the cylinder compression turns it to the next compression more quickly than it is possible to turn it by the… | ||
| scan0437 | Issues with magneto ignition on Phantom II cars, particularly its performance at slow cranking speeds. | ||
| View original record | X7791 To R. from Hs/Lid. c. Sg. Wor. c. Da. E. c. EY. EFC. Hs/Lid2/KT19.1.31. X.699. MAGNETO IGNITION ON PHANTOM II CARS. X.7791 X.6098 X.6064 With reference to EFC2/AD16.1.31 the inference is that… | ||
| scan0438 | Test results for a Watford E.W.6 Magneto, serial number 127221, for chassis number 27-EX. | ||
| View original record | X7791 15.1.31. X.7791. WATFORD E.W.6. MAGNETO No. 127221. CHASSIS NO. 27-EX. Tested 1.10.30. Passed at 120 Revs. } 5.5 mm. gaps. 160 " 190 " D.Ellis. | ||
| scan0439 | Instruction to despatch a Watford E.W.6 Magneto to Messrs. North & Sons for modification. | ||
| View original record | X7791.. Roy. from EFC. c. Despatch Stores. EFC6/AD26.1.31. X.7791. WATFORD E.W.6. MAGNETO. We are sending into the Stores Watford EW6 magneto No.127221. Will you please arrange for this to be… | ||
| scan0440 | Failed Watford EW6 Magneto to be returned to the makers for repair. | ||
| View original record | x7791 Roy. from Hs/Wst. c. G/Mt. c. D/BP. Hs/Wst.5/AD. 31.3.32. WATFORD EW6 MAGNETO NO. 124015. This magneto has failed on one of our exptl. cars due to the H.T. pick up brush holder breaking down.… | ||