Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Extract regarding the magneto selection for the Falcon X engine, considering Thomson-Houston and Watford Co. options. | ||
| View original record | Y 4021 Extract from R4/21.12.25. X.3835. X 3822 Falcon X. It will probably be fitted with the slightest Thomson-Houston 12-spark mags. but at the same time we shall be pleased if the Watford Co. will… | ||
| Scan002 | Update on the construction progress of the Watford 12-cylinder single spark magneto for aero engines. | ||
| View original record | By. from Wd. c. to Rg. c. to Hs. X 4021 Wd2/NJ9.6.26. Watford 12-cyl. Single Spark Magneto for Aero Engines. Last month we asked North & Sons how they were progressing with the construction of the… | ||
| Scan003 | Test report on two Watford type IS12 aero magnetos for a Falcon X experimental engine, detailing a failure and subsequent repair. | ||
| View original record | RR 238 (100 BKS.) (EHST.20-8-20.) MP 224350 X 3835 4021 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.Y.B. Order No. WB 104 Customer's No. X Watford type IS12 Aero magnetos. We have tested two of these… | ||
| Scan004 | Instruction sheet detailing the results of high and low-speed magneto sparking tests. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. RR 208(150 BKS) [BH57-29-8-20.] MP 22435B To Order No. Customer's No. run fully advanced at 2000 rpm and then high speed and low speed sparking tests. A 4.5 mm gap, was… | ||
| Scan005 | Attached report on Watford Aero Magnetos Type IS.12 for the Falcon X engine. | ||
| View original record | To Rg. from EFC. X4021 EFC3/T23.9.26. WATFORD AERO MAGNETOS TYPE IS.12. Further to our EFC2/T22.9.26, attached please find copy of my assistant's report WB.104, dealing with the two Watford type IS.12… | ||
| Scan006 | Test report on two Watford Type IS.12 Aero Magnetos for a Falcon X experimental engine. | ||
| View original record | WB.104. 23.9.26. WATFORD TYPE IS.12 AERO MAGNETOS. We have tested two of these magnetos received from Messrs. Norths and destined for Falcon X expl. engine. One of these, No.83120 failed after an… | ||
| Scan007 | Failure of distributor mouldings and wiring issues on Watford magnetos. | ||
| View original record | X4021 To Wd. from Hs/Rm. c. Ev. Hs/Rm2/T8.11.26. Re Watford Magnetos. IS.12. We are handing you herewith two distributor mouldings which have broken down on test, on the Watford magnetos, and one… | ||
| Scan008 | Summary of the troubles experienced with Watford magnetos, covering wiring, distributors, and other failures. | ||
| View original record | X2001 To R. from Hs/Rn. c. to BJ. Wor. c. to RG. E. c. to BY. DA. Hs/Rn2/LG9.11.26. WATFORD MAGNETOS. I.S. 12 The following is a summary of the troubles we have experienced with these magnetos so far… | ||
| Scan009 | Issues with magneto components, including incorrectly drilled holes and problems caused by rushed production. | ||
| View original record | contd :- -2- (6) Locking of components. There are a number of cases of studs etc. which cannot be locked up owing to the split pin holes being drilled in the wrong place. It will be evident from the… | ||
| Scan010 | Faulty contact breaker component from a Falcon X magneto, detailing issues with the points and mechanism. | ||
| View original record | X4601 To Wd. from EFC. EFC4/T10.11.26. CONTACT BREAKER COMPONENT. Herewith we hand to you the contact breaker component of one of the magnetos for Falcon X, in connection with which a complaint of… | ||
| Scan011 | List of ten points for possible improvement on the Watford Type IS Aero Magnetos. | ||
| View original record | EFC. X4021 10.11.26. WATFORD TYPE IS. AERO MAGNETOS. X4021/20 Points of possible improvement. (1) Condenser would be better protected if enclosed in case. One failure has already occurred. (2) H.T.… | ||
| Scan012 | Noted issues and suggestions following an examination of a Watford IS.12 magneto for the Falcon X engine. | ||
| View original record | To R. from EFC. c. to BJ. Wor. c. to Rg. By. c. to Da. E. X 4021 EFC3/T10.11.26. WATFORD IS.12 MAGNETO FOR FALCON X. X 4021/22 In addition to the points contained in the report Ha/Rm2/LG9.11.26, from… | ||
| Scan013 | The return of a repaired contact breaker from North & Sons Ltd. | ||
| View original record | Hs/Rm. from Wd. c. to By. (struck through) X4021 Wd3/NJ12.11.26. 1.5.12 Upon receipt of Hs/Rm2/T8.11.26 we returned to North & Sons Ltd. the two distributor blocks and the contact breaker referred to… | ||
| Scan014 | The return and identified faults of Watford magnetos for a Falcon X engine. | ||
| View original record | X4021 To Wd. from EFC. EFC7/T16.11.26. WATFORD MAGNETOS FOR FALCON X. Herewith we hand to you two magnetos type IS12, Nos. 83120, 83133 with all parts complete, for return to Messrs. Norths, in… | ||
| Scan015 | Issues with Watford Magnetos for the Falcon X, detailing correspondence with the supplier North & Sons regarding missing and incorrect parts. | ||
| View original record | EFC. from Wd. c. to Fy. X4021 RECEIVED NOV 25 1926 Wd9/NJ25.11.26 Watford Magnetos for Falcon X. Upon receipt of yours EFC7/T16.11.26, we forwarded to North & Sons the 4 magnetos type I.S.12,… | ||
| Scan016 | Oil fouling issues with Aero Type Watford IS.12 Magnetos. | ||
| View original record | To Wd. from EFC. X4021 EFC5/T30.11.26. X.4021. AERO TYPE WATFORD IS.12 MAGNETOS.NOS.83134/5. Please find attached copy of my assistant's report WB.114 in connection with these magnetos. I had copies… | ||
| Scan017 | Sparking faults and magnetic leakage in two magnetos returned to Messrs. Norths for investigation. | ||
| View original record | Contd. -2- EFC5/T30.11.26. We are now again handing you these two magnetos Nos. 83134/5 as it was requested by Messrs. Norths that they should be returned to them. In the meanwhile we have a report… | ||
| Scan018 | The testing and fault diagnosis of Watford Aero Magnetos type IS.12, numbers 83134/5. | ||
| View original record | EFC. WB.114. 24.11.26. WATFORD AERO MAGNETOS TYPE IS.12 Nos. 83134/5. These magnetos were returned to us for a short test, the testers reporting loss of power due to ignition. We found that running in… | ||
| Scan019 | Extract regarding the fitting of magnetos from either Thomson-Houston or Watford. | ||
| View original record | X4021 Extract from RL/M6.11.26. ROLLS ROYCE F.10. X.3996. X.3832b. X.4021. Regarding the magnetos I quite think we must be able to fit either Thomson-Houston or Watford. I hope on Monday to be able to… | ||
| Scan020 | Reported trouble with Watford magnetos and the need to increase stock to twelve units. | ||
| View original record | X 4021 To RG) HS) from R. BY) RB/M8.11.26. c. to BJ. Wor. RR.F.10. WATFORD MAGNETOS. I have spoken to Mr. North. We seem to have only two Watford magnetos, There is reported trouble with the H.T.… | ||
| Scan021 | Investigation into a failed Watford aero magneto from a Falcon X engine. | ||
| View original record | RR 238 (150 BKS.) (BHS) 29-6-26.) MP 224355 X. 4021 ROLLS-ROYCE, LTD. INSTRUCTIONS. To: E.F.B. Order No.: WB 111 Customer's No.: Watford aero magneto type IS12 NO 83132. This magneto failed to fire… | ||
| Scan022 | Instructions regarding an oil leak into a magneto causing bad contact, and the subsequent fix. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. Customer's No. 19 to burn and oxidize, consequently causing bad contact at make. The oil appears to have come through from the rear of the magneto as after… | ||
| Scan023 | List of points for discussion with Messrs. North's regarding magneto and distributor issues. | ||
| View original record | EFC. X4021 24.11.26. POINTS TO BE DISCUSSED WITH MESSRS. NORTH'S (1) Punctured distributor on one of two magnetos on Falcon X. (2) Access of oil to contact breaker; does it come from spigot end ? (3)… | ||
| Scan024 | Status and anticipated improvements for Watford Type IS.12 magnetos. | ||
| View original record | To Wd. from EFC. X4021 EFC5/T3.12.26. WATFORD TYPE IS.12 MAGNETOS. Further to our conversation of this morning it was agreed that the position at present in regard to the eight magnetos of this type… | ||
| Scan025 | Clarifying the ownership of several pairs of Watford Type IS.12 Aero Magnetos. | ||
| View original record | X4021 7.12.26. WATFORD TYPE IS.12 AERO MAGNETOS Two pairs of these, Nos.83119/20 and 83132/3 are Air Ministry property. The other two pairs, Nos.83134/5 and 83136/7 are our property. EFC. | ||
| Scan026 | Instruction sheet detailing the measurement of the safety gap on a Watford aero magneto type IS12, which was found to be too small. | ||
| View original record | X4021 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.F.G. Order No.: WB117 Customer's No.: X 4021 9 - 12 - 1926 Safety gap on Watford aero magnetos type IS12. In a previous report on these magnetos… | ||
| Scan027 | Instruction regarding the safety gap on the B.T.H SC12-7 magneto for Watford machines. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. RR 235(100 BKS) LSHDT.29-6-20.) MP 22435 19 To Order No. Customer's No. SC12-7 Of this type, the B.T.H SC12-7 magneto has a 9.0 mm safety gap, and we consider that the… | ||
| Scan028 | Safety gaps of Watford Aero Magnetos Type IS.12, noting they are too small and comparing them to B.T.H. magnetos. | ||
| View original record | X4021 To Wd. from EFC. EFC5/T10.12.26. X.4021 - WATFORD AERO MAGNETOS TYPE IS.12. The safety gaps of these magnetos are not accessible for measurement with removal of the armature cover. We generally… | ||
| Scan029 | Specification of inspection and test for a Watford type IS.12 aero magneto for the Falcon X engine. | ||
| View original record | X4021 EFC/T10.12.26. X.4021. WATFORD TYPE IS.12 AERO MAGNETO FOR FALCON X. ENGINE. SPECIFICATION OF INSPECTION AND TEST. (1) The contact breaker cover and distributor ring shall be removed and the… | ||
| Scan030 | Testing procedures for a magneto, detailing various RPM runs, force limits, and spark gap settings. | ||
| View original record | -2- Contd. (4) The contact breaker cover shall be replaced, and screwed up in position, and a test shall be made of the tangential force at lever pin radius necessary to cause advance or retard. In… | ||
| Scan031 | Comparison of B.T.H. and Watford magnetos for the Falcon X aero engine, discussing performance tests and oil-related faults. | ||
| View original record | To R. from EFC. c.c. BJ. Wor. c. E. Da. c.c. Rg. By. Wd. X4021 EFCl/T13.12.26. MAGNETOS FOR FALCON X. AERO ENGINE. Points of comparison between the B.T.H. SCL2-7 and the Watford type IS.12. X3832 b… | ||
| Scan032 | Watford magneto issues, including oil leaks into the contact breaker and distributor failures. | ||
| View original record | Contd. -2- EFCL/T18.12.26. The timing of the Watford magneto would appear to be better arranged in this respect in that it takes a larger increase of the gap before misfiring begins. In actual results… | ||
| Scan033 | Critique and suggested modifications for a Watford magneto type IS.12. | ||
| View original record | Contd. -3- EFC1/T13.12.26. It is suggested that if the Watford radial exit type of distributor were made of rubber base material, it would be generally satisfactory. Further particular points of… | ||
| Scan034 | Comparative electrical performance tests of B.T.H. and Watford magnetos for the Falcon X aero engine. | ||
| View original record | EFC. WB.118. 13.12.26. B.T.H. TYPE SCL2-7 AND WATFORD TYPE IS.12. MAGNETOS FOR FALCON X. We have now completed comparative electrical performance tests on one of each of the above magnetos. Our… | ||
| Scan035 | General specification of performance for a 12-cylinder, four spark per revolution magneto for the Falcon X aero engine. | ||
| View original record | X4021 13.12.26. GENERAL SPECIFICATION OF PERFORMANCE OF 12-CYLINDER FOUR SPARK PER REVOLUTION MAGNETO FOR RR. FALCON X. AERO ENGINE. X38328 X4021 (1) The weight of the magneto complete but without… | ||
| Scan036 | Page 2 of a magneto utility test procedure, detailing spark gap testing under various conditions. | ||
| View original record | -2- Contd. (5) The magneto shall now be subjected to a utility test, i.e. a test to find out its capability of producing sparks under adverse (i.e. leaky ) plug conditions. For this purpose a 3.0 mm.… | ||
| Scan037 | Specifications for magneto timing, sparking speed, and contact breaker lever operation. | ||
| View original record | -3- Contd. A. 150 r.p.m. for the fully advanced position of the timing lever. B. 190 r.p.m. for the central position. C. 230 r.p.m. for the fully retarded position. Note:- The minimum regular sparking… | ||
| Scan038 | Broken Watford Aero Magneto distributor, an attached report, and a request for a replacement. | ||
| View original record | To Wd. from EFC. X4021 EFC1/T14.12.26. X.4021. WATFORD AERO MAGNETO TYPE IS:12. We hand you herewith the distributor of magneto No.83137 of the above type. This distributor has broken down while… | ||
| Scan039 | Magneto distributor failure due to a spark jumping to earth, with a recommendation to increase the distance to prevent tracking. | ||
| View original record | EFC. WB.120. X.4021. WATFORD IS.12 MAGNETO NO.83137. The H.T. distributor on this magneto has broken down owing to the spark from one of the terminals nearest to the earthed securing clamp jumping… | ||
| Scan040 | Correspondence regarding a replacement distributor block for a Watford Aero Magneto and plans for a new rubber-based design. | ||
| View original record | EFC. from Wd. auto to CE/Dr. [strikethrough] X4021 Wd3/NJ22.12.26. Hs [Stamp: RECEIVED 22 XII 26] X.4021 - Watford Aero Magneto I.S.12. Referring to EFC1/T14.12.26, we are in receipt of a letter from… | ||
| Scan041 | Confirmation from North & Sons Ltd. to increase the safety gap length in Watford Aero Magnetos Type I.S.12. | ||
| View original record | X.4021 - Watford Aero Magnetos Type I.S.12. In reply to EFC5/T10.12.26, North & Sons Ltd. have written us confirming the verbal undertaking which Mr.North and Mr.Allen gave to you on the 17th inst.… | ||
| Scan042 | Request for a sectional blueprint of the Watford IS.12 aero magneto. | ||
| View original record | To Wd. from EFC. X4021 EFC3/T29.12.26. WATFORD IS.12 AERO MAGNETO. We should be pleased if you could obtain for us a sectional blueprint of the Watford IS.12 aero magneto. We already have such a print… | ||
| Scan043 | Watford IS.12 Aero Magnetos, attaching assistant's reports WB.122 and WB.124. | ||
| View original record | X4021 To Wd. from EFC. c. Hs/VH. EFC6/T7.1.27. RE WATFORD IS,12 AERO MAGNETOS. Herewith we attach copies of my assistant's reports WB.122 and WB.124, in connection with the above. EFC. | ||
| Scan044 | Investigation into the oiling procedures and effects on the Watford IS.12 magnetos. | ||
| View original record | EFC. WB.122. 6.1.27. OILING OF WATFORD IS.12 MAGNETOS. On these magnetos provision is made for lubricating oil to leak from the front bearing on to the contact breaker bearing surfaces and from thence… | ||
| Scan045 | The correct lubrication levels for magnetos to avoid affecting the platinum points. | ||
| View original record | -2- Contd. vapours to arise which would affect the platinum points. This test also confirms that it is unnecessary to oil these magnetos liberally and too frequently; if the oil-well is filled… | ||
| Scan046 | Critique of the low tension earthing connection method on Watford IS.12 magnetos. | ||
| View original record | EFC WB.124. 7.1.27. LOW TENSION EARTHING CONNECTION ON WATFORD IS.12 MAGNETOS. This method adopted by Messrs. Norths for securing the low tension earthing or switching wire is not considered by… | ||
| Scan047 | Following up on an outstanding request for blueprints of a Watford I.S.12 type Aero Magneto. | ||
| View original record | X4021 EFC. from Wd. Wd4/NJ10.1.27. Watford I.S.12 type Aero Magneto. On 29th ult. we wrote North & Sons Ltd. requesting them to send us 2 copies of blueprint giving sectional view of this magneto.… | ||
| Scan048 | Letter regarding Watford I.S.12 type Aero Magnetos, attaching correspondence from North & Sons Ltd. | ||
| View original record | EFC. from Wd. X.4021. Hs Wd7/NJ13.Mar27:S RECEIVED Re Watford I.S.12 type Aero Magnetos. Referring to EFC6/T7.1.27 and your assistant's reports WB.122 and WB.124 therein referred to, I attach hereto… | ||
| Scan049 | Letter from North & Sons Ltd. discussing reports on oiling and the preparation of low tension wire. | ||
| View original record | Copy of letter received from:- Messrs. North & Sons Limited., Whippendell Road, Watford. Our ref: CHK/HC.6. 12th January 1927. Your ref: Wd5/NJ10127. Messrs.Rolls-Royce Limited., Derby. Dear Sirs, We… | ||
| Scan050 | Instructions detailing modifications to Watford IS12 magnetos for the Falcon X engine. | ||
| View original record | RR 598 (150 BKS.) (DB 431-8 12 24) MP 306975 X. 4021. ROLLS-ROYCE LTD. INSTRUCTIONS. To: C.T.b. Date: 25 - 1 - 1927 Order No.: WCI Customer's No.: X4021 Watford IS12 magnetos for Falcon X. We have now… | ||
| Scan051 | Comparison of a distributor design against the B.T.H model, noting its superior features but questioning an addition. | ||
| View original record | RR 238 (150 BKS.) (DB 431-8-12-24) MP 306978 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. Customer's No. With regard to the above, the distributor is of good design and we consider it to be superior… | ||
| Scan052 | Instructions regarding magnetos, covering ventilation windows, weight, distributor nuts, and safety gaps. | ||
| View original record | RR 236 (150 BKS.) (DB 431-8.12.24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To_____________________ Order No._______________ Customer's No.________________ unless Messrs Norths are in future… | ||
| Scan053 | Test report on two production magnetos, detailing pass/fail results for low-speed sparking. | ||
| View original record | RR 238 (180 BKS.) (DD 431-8.12.24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To______________________________________19__ Order No.__________________ Customer's No.________________ These magnetos have… | ||
| Scan054 | Return of obsolete distributors and screens for Watford IS.12 Aero Magnetos. | ||
| View original record | To Wd. from EFC. X4021 EFCL/T26.1.27. WATFORD IS.12. AERO MAGNETOS. We send you herewith two obsolete distributors complete with screens from Watford IS.12 magnetos, together with another old screen.… | ||
| Scan055 | Alterations and performance issues with Watford IS.12 magnetos for the Falcon X engine. | ||
| View original record | To R. from EFC. c. BJ. E. c. Wor. By. c. Rg. Wd. c. AID. Y4021 EFC6/T31.1.27. WATFORD IS.12 MAGNETOS FOR FALCON X. Y4021 X3832b Please find attached copy of my assistant's report WC.1 in connection… | ||
| Scan056 | Modified Watford IS.12 magnetos for the Falcon X engine. | ||
| View original record | WC.1. 25.1.27. WATFORD IS.12 MAGNETOS FOR FALCON X. We have now received back from Messrs. Norths, magnetos Nos. 83119/20 which we returned for modification. They appear to differ from the magnetos we… | ||
| Scan057 | The effect of increasing the primary gap on the high-speed performance of Watford and B.T.H. aero magnetos. | ||
| View original record | WC.3. 27.1.27. EFFECT ON HIGH SPEED PERFORMANCE (ADVANCED) OF INCREASING THE PRIMARY GAP ON WATFORD AND B.T.H. AERO MAGNETOS. Tests have been made to determine the above on Watford IS.12 magneto… | ||
| Scan058 | The Air Ministry's decision not to proceed with the modification of Watford magnetos. | ||
| View original record | X4021 HS RECEIVED FEB 8 1927 Mr. Rowledge. c to Mr. Hives. Mr. Grinage, A.I.D. A W/HB/1227/8-2-27. WATFORD MAGNETOS 83134 & 5. With regard to memo EFCI/T. 25-I-27, regarding the above magnetos which… | ||
| Scan059 | Replacement magneto for Eagle XVI engines after one failed a two-hour test. | ||
| View original record | X 4021 Mr. Rowledge. c to Mr. Hives. Mr. Crinage, A.I.D. Hs W/HB/G.44/8-2-27 RECEIVED FEB 1927 EAGLE XVI ENGINES. ------------------ The Air Ministry inform me that they think they can supply a… | ||
| Scan060 | Distributor timing specifications for a Watford IS12 Magneto No. 83133. | ||
| View original record | X4021 9.2.27. WATFORD IS12 MAGNETO No.83133. DISTRIBUTOR TIMING. Quantity. | Relative dimension. | Absolute dimension. ---|---|--- Pitch. (P) | 1.000 | .753" Make ratio (M) | .578 | .435" Range. (R) |… | ||
| Scan061 | Calculations for piston position and spark timing relative to a hand magneto. | ||
| View original record | -2- For instantaneous position of piston when hand magneto begins to send sparks to cylinder, we have:- Retard of centre line of trailing brush behind leading edge of main brush = 1.202 {+.113} =… | ||
| Scan062 | Contact breaker timing data for a Watford IS.12 Magneto, No. 83133. | ||
| View original record | V4021 9.2.27. CONTACT BREAKER TIMING OF WATFORD IS.12 MAGNETO. NO.83133. Advance. Retard. Make. -6° 9° Break. 46° 61° Make. 86° 101° Break. 138° 153° Advance. Retard. Make. -18° 20° Break. 94° 124°… | ||
| Scan063 | Instructions regarding production testing and sparking issues with Watford IS12 magnetos. | ||
| View original record | RR 239 (150 BKS.) (DB 461-8-12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.F.C. Order No.: WC7 Customer's No.: X4021 Date: 12. Feb 1927 Reference: X4021 Watford IS12 magnetos Nos 83132/3. We… | ||
| Scan064 | Instruction note regarding the poor performance of magnetos under certain engine conditions. | ||
| View original record | RR 238 (150 BKS.) (DB 481-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. Customer's No. is also poor in relation to the other mags we have tested. We feel sure that these magnetos… | ||
| Scan065 | Reply from North & Sons Ltd. regarding feedback on Watford I.S.12 Magnetos for the Falcon X engine. | ||
| View original record | EFC.from Wd. X.4021 Wd13/NJ14.2.27. Watford I.S.12 Magnetos for Falcon X. The remarks in yours EFC6/T31.1.27 were duly communicated to North & Sons Ltd. and we are now in receipt of their reply dated… | ||
| Scan066 | The unsatisfactory bench test performance of Watford IS.12 magnetos, highlighting issues with sparking and timing. | ||
| View original record | XL4021 To Wd. from EFC. C A.D. EFC2/T21.2.27 WATFORD IS.12. MAGNETOS NOS.83132/3. The above magnetos were received on the 3rd. inst. On test on the bench we find the sparking of these magnetos in the… | ||
| Scan067 | Modifications to Watford type IS.12 magnetos and seeking A.I.D. confirmation for upgrades. | ||
| View original record | X4021 EFCl/T24.2.27. To RHC. from EFC. c. Hs/TMW. c. Mr. Payne. c. A.I.D. c. Wd. With reference to our EFCl/T25.1.27, under cover of which we handed you two Watford type IS.12 magnetos Nos. 83119/20… | ||
| Scan068 | The investigation and comparative testing of a faulty Watford Aero Magneto from a Falcon engine. | ||
| View original record | X4021 To A.I.D. from EFC. c. Wd. R.G.A c. Mr. Payne. EFC2/T25.2.27. WATFORD AERO MAGNETO NO. 83136. LORX-4021 X3832 This magneto has been removed from Falcon engine F.X.10. on account of development… | ||
| Scan069 | Technical report discussing the performance and testing of a magneto contact breaker. | ||
| View original record | CERTIFICATE OF INSPECTION BY A.I.D. ROLLS-ROYCE ENGINES AND SPARES Contd. -2- EFC2/T25. 2. 27. non-inductive. This explanation however appears to be untenable. It is difficult to give any explanation… | ||
| Scan070 | Correspondence regarding the performance of two Watford IS.12 magnetos and a reply from supplier North & Sons. | ||
| View original record | EFC. from Wd. X4021 Wd1/NJ1.3.27. Watford IS.12 Magnetos Nos.83132/3. In reply to EFC2/T21.2.27, North & Sons have written us as follows:- "We beg to acknowledge receipt of your letter of "the 23rd… | ||
| Scan071 | Inability to return certain magnetos and the arrangement of a meeting to discuss their use on the Falcon X engine. | ||
| View original record | X 4021 To Wd. from EFC. c. A.I.D. (Mr. Wilkins). EFC3/T1.3.27. WATFORD MAGNETOS NOS.83132/3. We have yours Wd1/NJ1.3.27, enquiring if arrangements can be made to release the two magnetos Nos.83132/3… | ||
| Scan072 | Dispute over which magneto to use for an F.10 engine test and arranging a conference to resolve the matter. | ||
| View original record | U.W. X4021 HG. c. Hs. ------- BY1/H. 3.3.27. -------- Clerk, wd. saw Mr.North yesterday in connection with the chassis magneto, and round Mr.North very upset and perturbed. He had been to see Colonel… | ||
| Scan073 | Requesting the location and delivery of specific Watford IS.12 magnetos. | ||
| View original record | To RHC. from EFC. XU21 EFC1/122.5.21. WATFORD IS.12 MAGNETOS. Now that we have magnetos Nos. 83119/20 fitted to X.F.12, would you please have looked up the 3/ remaining magnetos Nos.83134/5 and 83137… | ||
| Scan074 | Status of several Watford Aero Magnetos and inquiring about their return for correction. | ||
| View original record | X4021 To Mr. Wilkins (A.I.D.) from EFC. EFC2/T29.3.27. WATFORD AERO MAGNETOS. Are we yet in a position to be able to return any of these magnetos to Mr. North as he has requested ? At present only one… | ||
| Scan075 | Status and authorization of work on Watford Aero Magnetos. | ||
| View original record | A.M. FORM 1084. X-4021 AERONAUTICAL INSPECTION DIRECTORATE. MEMORANDUM. No. 30 From INSPECTOR IN CHARGE A.I.D. To Mr. Hives (Mr. Clark.) Mr. Rowledge. Mr. Bailey. Mr. Crinage, A.I.D. Date March 30th.… | ||
| Scan076 | Letter to Messrs. North & Sons regarding the unsatisfactory situation with Watford Aero Magnetos type IS.12. | ||
| View original record | Y4021 c. Wd. c. Rg. c. Ry. EFC3/T. 1st April, 1927. Messrs. North & Sons, Watford. For the attention of Mr. R.B.North. Dear Sirs, Watford Aero Magnetos type IS.12. When you visited these Works and… | ||
| Scan077 | Letter from North & Sons, Ltd. concerning modifications to Watford Aero Magnetos. | ||
| View original record | X.4021 THE BRITISH MADE Watford SPEEDOMETERS & MAGNETOS. NORTH & SONS, LTD. WHIPPENDALL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON.… | ||
| Scan078 | Letter to North & Sons regarding photostat copies of Make-Ratio Speed Curves for Aero Magneto Contact breakers. | ||
| View original record | X 4021 EFCL/T. 7th May, 1927. Messrs. North & Sons, Whippendell Road, Watford. Dear Sirs, During your recent visit, you will remember we promised you copies of Make-Ratio Speed Curves of Aero Magneto… | ||
| Scan079 | Letter to the Air Ministry requesting permission to return faulty Watford magnetos to the makers for modification. | ||
| View original record | Y4021 c. By. Hs. HFW c. Mr. Wilkins, A.I.D. Rg4/LW. May 9th 1927 The Secretary, AIR MINISTRY, Adastral House, Kingsway, LONDON, W.C.2. Dear Sir, Watford Magnetos Some time ago we mentioned to you that… | ||
| Scan080 | Production inspection and test results for the Watford Type IS.12 Magneto. | ||
| View original record | X 4021 WATFORD TYPE IS.12 MAGNETO. X.4021. PRODUCTION INSPN. & TEST. | Date | Magneto No. | (1) Remarks | (2) Range (Degrees) <15° | (3) Remarks | (4) Taper (AHS) 5.5 s | (5) Remarks | (6) Remarks |… | ||
| Scan081 | Visit by Mr. North concerning issues and alternative suppliers for aero engine magnetos. | ||
| View original record | X 4021 Extract from RL/M19.8.27. VISIT TO WW. BY MR.NORTH CONCERNING MAGNETOS. X.3835 X.4021. Regarding magnetos for aero engines, it will be understood that owing to some trouble with the Air… | ||
| Scan082 | Letter to North & Sons regarding issues with Watford I.S.12 Aero Magnetos, including a note from Mr. Royce. | ||
| View original record | c. RY. c. RG. c. HS/CEP. c. Mailing. X.4021 EFC2/T. 22nd. August, 1927. Messrs. North & Sons, Whippendell Road, WATFORD. For the attention of Mr. R.E. North. Dear Sirs, Watford I.S.12. Aero Magneto.… | ||
| Scan083 | Letter to Messrs. North & Sons regarding the return of out-of-date magnetos and requirements for new ones. | ||
| View original record | Messrs. North & Sons. -2- Contd. ******************* I am aware that this machine has not yet passed a type test, but I think this has been largely delayed because of it waiting for a satisfactory… | ||
| Scan084 | Performance report on four Watford Aero Magnetos, type IS.12, detailing issues and run times. | ||
| View original record | X4021 25.8.27. WATFORD AERO MAGNETOS TYPE IS.12. No. 83119. This magneto has run a considerable time on one of our experimental engines and has been reasonably O.K. No. 83120. This magneto ran a short… | ||
| Scan085 | Arrangements for the modification of Watford Magnetos Type I.S.12. | ||
| View original record | To: [REDACTED]n. from Hs/CEP. O: [REDACTED] C. EFC. X 4021 Hs/CEP1/BE.29.8.27. RE WATFORD MAGNETOS TYPE I.S.12. When Mr. North of the Watford Magneto Co., visited the Works last Friday, he took away… | ||
| Scan086 | Letter from North & Sons Ltd regarding the use of their Watford Magnetos in the Schneider Trophy race. | ||
| View original record | X4021 THE BRITISH MADE Watford SPEEDOMETERS & MAGNETOS. NORTH & SONS, LTD. WHIPPENDALE ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD. WORKS: 422 & 423 WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON.… | ||
| Scan087 | Test results for Aero Magneto Rotor M.I., comparing Watford and B.T.H. components. | ||
| View original record | X4021 30.9.27. AERO MAGNETO ROTOR M.I. TEST RESULTS. Inclusive M.I. of Watford rotor :- 1.01 lb-inch² B.T.H. " :- 1.48 lb-inch² Rating of spring drive given = 18.6 lb-inches per degree. Natural period… | ||
| Scan088 | From EFC to Roy regarding the overdue return of Watford magnetos from Messrs. Norths. | ||
| View original record | X4021 To Roy. from EFC. EFC2/T6.10.27. X7791 WATFORD MAGNETOS. We are awaiting the return from Messrs. Norths of firstly, the Watford sleeveless type chassis magneto, No.99802, about which we wrote… | ||
| Scan089 | Use of a Watford magneto drive over a solid drive, citing lower risk and successful use in Napier engines for the Schneider Trophy Race. | ||
| View original record | RG. from R. Hs. c. to BJ. Wor. BY. +4021 R1/M3.11.27. AERO MAGNETO DRIVE. X.4017 X.4021 Have there been any failures with the solid drive; if not we ought to use it. Would there not be less risk with… | ||
| Scan090 | Letter to North & Sons Ltd. regarding an upcoming engine type test for 12-cylinder aero magnetos. | ||
| View original record | X4021 EFG3/T. 4th November, 1927. Messrs. North & Sons Ltd., Whippendell Road, Watford. Dear Sirs, With reference to 12-cylinder aero magnetos, and in particular those of the IS.12, or other type… | ||
| Scan091 | Letter from North & Sons Ltd regarding the completion timeline for 12 cylinder aero magnetos for an engine type test. | ||
| View original record | Y4021 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:… | ||
| Scan092 | Letter to Messrs. North & Sons, Ltd. regarding the scheduling of a Type Test. | ||
| View original record | X4021 EFCl/T. 12th November, 1927. Messrs. North & Sons, Ltd., Whippendell Road, WATFORD. Dear Sirs, Answering your letter ref. CHK/IT.2. of the 10th instant, we hope to carry out this Type Test in a… | ||
| Scan093 | Letter from North & Sons, Ltd. regarding a delay in submitting approved magnetos for a Type Test. | ||
| View original record | X4021 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:… | ||
| Scan094 | Letter to Messrs. North & Sons Ltd. regarding a revised specification for a 12-cylinder aero magneto for the Falcon aero engine. | ||
| View original record | XL4021 EFC4/T. 22nd. November, 1927. Messrs. North & Sons Ltd., Whippendell Road, Watford. Dear Sirs, Please find enclosed Specification giving the revised and up-to-date requirements of 12-cylinder… | ||
| Scan095 | Letter to Messrs. North & Sons Ltd. regarding a revised specification for 12-cylinder magnetos for Falcon aero engines. | ||
| View original record | X4021 Rq. EFC3/T. 26th November, 1927. Messrs. North & Sons Ltd., Whippendell Road, WATFORD. Dear Sirs, Recently we sent you a revised copy of our specification of performance of 12-cylinder magnetos… | ||
| Scan096 | Letter from North & Sons, Ltd. discussing the specifications and potential modification of 12 cylinder magnetos. | ||
| View original record | THE BRITISH MADE Watford SPEEDOMETERS & MAGNETOS. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON. AEROMAGS… | ||
| Scan097 | Continuation sheet from North & Sons Ltd concerning modifications to a driving disc. | ||
| View original record | NORTH & SONS LTD AH 2. Continuation Sheet No. 1 that we may make the necessary modifications to the driving disc of the automatic mechanism to permit of this being used with your coupling. Yours… | ||
| Scan098 | Drawing of an automatic advance to suit a Simm's coupling with 20 teeth. | ||
| View original record | [ "203", "AUTOMATIC ADVANCE TO SUIT SIMM'S COUPLING (20 TEETH)", "589-1", "3.406"", "Thrd 3/8 WHIT.", ".591", "1/2"", ".25", "1.125"", "1.375"", "Alterations", "Init.", "Date", "For Model", "No off",… | ||
| Scan099 | Proposal from Messrs. North & Sons for a Watford Aero Magneto's automatic advance mechanism. | ||
| View original record | To Rg. from EFC. X.4021 EFCl/T30.11.27. WATFORD AERO MAGNETO. We have received a letter from Messrs. North & Sons. in answer to the one which we sent and which I shewed to you, demanding a 30° range… | ||
| Scan100 | Letter to North & Sons Ltd. discussing requirements for magnetos on 12-cylinder aero engines, specifically regarding automatic advance mechanisms. | ||
| View original record | X4021 Ra EFC2/T. 1st. December, 1927. Messrs. North & Sons Ltd., Whippendell Road, WATFORD. Dear Sirs, With further reference to magnetos for our aero engines and partly in answer to your CHK/DEW.1.… | ||
| Scan101 | Letter asking for a lighter and smaller magneto alternative to the dual magneto drive. | ||
| View original record | -2- Contd. retard of the dual magneto drive, what could you give us in return in the way of a lighter and smaller magneto to have the same performance with obvious exceptions as has been outlined in… | ||
| Scan102 | Letter from North & Sons, Ltd. regarding modifications and testing of aero magnetos. | ||
| View original record | X4021 SPEEDOMETERS @MAGNETOS. THE BRITISH MADE Watford NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD. WORKS, 422 & 623 WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON.… | ||
| Scan103 | Production of a Watford 12-cylinder aero magneto and potential size reduction. | ||
| View original record | X4021 To Rg. from EFC. EFC5/T6.12.27. WATFORD 12-CYLINDER AERO MAGNETO. Herewith we send you copy of a letter received from North & Sons, in answer to mine concerning increase of range and the… | ||
| Scan104 | Letter to North & Sons Ltd. regarding the return of four IS12 aero magnetos for comparative testing. | ||
| View original record | BY. Mailing. V4021 Expl. Dept. EFC8/T. 8th December, 1927. Messrs. North & Sons Ltd., Whippendell Road, Watford. Dear Sirs, AERO MAGNETOS: We are now referring particularly to the four aero magnetos… | ||
| Scan105 | Telephone message about the specifications of a new Watford aero engine magneto. | ||
| View original record | X4021 22.12.27. WATFORD AERO ENGINE MAGNETO. Yesterday we had a telephone message from Mr. North that they had determined that they could give a 30° range on the new magneto which they are making up,… | ||
| Scan106 | Electrical experimental record sheet for a Watford IS 8-8 aero magneto, number 83104. | ||
| View original record | X4022 ELECTRICAL EXPERIMENTAL RECORD SHEETS X.&No:- 4022 Watford IS 8-8 aero magneto NO 83104 | Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles… | ||
| Scan107 | Letter from North & Sons, Ltd. concerning the return and testing of aero magnetos. | ||
| View original record | X4021 The BRITISH MADE Watford SPEEDOMETERS @ MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1349 GERRARD WORKS. 622 & 623 WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON.… | ||
| Scan108 | Continuation sheet from North & Sons Ltd discussing experiments with an inductor type of machine. | ||
| View original record | NORTH & SONS LTD AH 2. Continuation Sheet No.1. This is considerably better that it has previously been possible to obtain with an inductor type of machine, but we are carrying out further experiments… | ||
| Scan109 | Table detailing the location and status of various Watford Aero Magnetos. | ||
| View original record | E.F.C. X4021 12.1.28 PRESENT LOCATION OF WATFORD AERO MAGNETOS. (15° range) Characteristics. Magneto No. Location. Remarks. Uptodate. { 83119.S. { Lab. } HEW. altering range(struck through) To 20°. {… | ||
| Scan110 | Letter to Messrs. North & Sons Ltd. clarifying specifications for aero and chassis magnetos, specifically regarding the point at break and make variations. | ||
| View original record | X4021 extract EFCL/T. 4th January, 1927. X.4021 X.7791 Messrs. North & Sons Ltd., Whippendell Road, Watford. Dear Sirs, We thank you for your two letters ref. CHK/DEW&2 of the 22nd. December, dealing… | ||
| Scan111 | Suggesting to send Bosch and Scintilla magneto samples and test results to Watford to aid English manufacturers. | ||
| View original record | EFO.) HS. } FROM R. BY. } (At Le Canadel.) X4021 R4/M21.1.28. REC'D. & DESPATCHED FROM WW. 24.1.28. C. to BL. WOR. RG. E. re. AERO MAGNETOS. X3835 I suggest we offer to send to Watford our sample of… | ||
| Scan112 | Testing and inspection of various aero magnetos to assist English manufacturers. | ||
| View original record | To Roy. from EFC. X4021 EFC2/T2.2.28. AERO MAGNETOS. X5835 X.3832 X4021 We received a note from Mr. Royce ref. R4/M21.1.28 in which he suggested that we should offer to send to Watfords our samples of… | ||
| Scan113 | Suitability of a true inductor type aero magneto, as represented by Watford and R. Bosch of Germany. | ||
| View original record | X4021 E. )from R. EFC) Hs.) c. BJ. Wor. By. COPY RL/M3.2.28. RECD. & DESPATCHED FROM WW.7.2.28. RE AERO MAGNETOS. X3835 X.4675. Referring to your memo. of 20.12.27 it appears your type one is the most… | ||
| Scan114 | Letter from North & Sons, Ltd. concerning the supply of experimental aero engine magnetos and the need for an Air Ministry contract. | ||
| View original record | XL4021 SPEEDOMETERS & MAGNETOS. THE BRITISH MADE Watford NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 422 & 423 WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON… | ||
| Scan115 | Letter from North & Sons, Ltd. to E. Fowler Clark Esq. regarding a potential contract for magnetos. | ||
| View original record | E.Fowler Clark Esq. even if some little delay occured before the order was placed, and we hope that after you have given the matter consideration you will concur in that view . In the event of such a… | ||
| Scan116 | From EFC to Rg regarding a quote for Watford aero engine magnetos. | ||
| View original record | X4021 To Rg. from EFC. EFC3/T14. 2.28. WATFORD AERO ENGINE MAGNETOS. In reply to mine EFC2/T. of the 20th ult. addressed to Messrs. North & Sons, in which you may remember I asked them to quote for… | ||
| Scan117 | The moment of inertia for a lightened B.T.H. aero magneto rotor. | ||
| View original record | To R. from EFC. c. BJ. E. c. EX. RG. X4021 EFC2/T17.4.28. X3832/ MOMENT OF INERTIA OF LIGHTENED B.T.H. AERO MAGNETO. A lightened B.T.H. rotor similar to those provided in the two lightened B.T.H. type… | ||
| Scan118 | The testing, issues, and modifications of Watford IS.12 aero magnetos. | ||
| View original record | To R. from EFC. c. BJ. E. c. Rg. Wor. c. BV. V4021 EFC5/T7.5.28. PRESENT POSITION OF WATFORD IS.12 AERO MAGNETOS. V4021 We have had for test in all eight magnetos (four pairs) Air Ministry property.… | ||
| Scan119 | Letter to Messrs. North & Sons Ltd. regarding the supply of Watford 12-cylinder aero magnetos with an updated specification. | ||
| View original record | R. s/p Rq o/p Ry. 7/21 X4021 EFC6/T. 7th May, 1928. Messrs. North & Sons Ltd., Whippendell Road, Watford. Dear Sirs, We are still anxious to continue experiments with Watford 12-cylinder aero… | ||
| Scan120 | Letter from supplier North & Sons regarding a delay and availability of 12-cylinder magnetos. | ||
| View original record | THE BRITISH MADE Watford SPEEDOMETERS MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 822 & 823 WATFORD. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, CROWN… | ||
| Scan121 | Requesting to place an order for a pair of Watford Aero Magnetos. | ||
| View original record | X4021 To Rg. from EFC. c. By. Roy. EFC1/T10.5.28. WATFORD AERO MAGNETOS. In answer to our letter ref. EFC6/T. of the 7th inst., we have received from Messrs. North a letter of which the attached is a… | ||
| Scan122 | Procurement and modification of magnetos for 'F' Type engines. | ||
| View original record | COPY. Y4021 ROY. BY17/G.15.5.28. c. RG. c. Hs. c. BY/EL. C. EFC. ------ R.R. F. TYPE ENGINES - MAGNETOS. Referring to the 50 engines which are being produced in the Works of the above type, in dealing… | ||
| Scan123 | Acquisition of two Watford 12-cylinder magnetos for experimental use, waiving the A.I.D. inspection. | ||
| View original record | Y4021 --ROY.-- [crossed out] C. Rg. [crossed out] C. Hs. [crossed out] --C. DY/EL.-- [crossed out] BY1/G.25.5.28. AERO ENGINE MAGNETOS. RE TWO WATFORD 12 CYLINDER MACHINES REFERRED TO IN OUR MEMO… | ||
| Scan124 | Confirming the cost of two special Watford aero magnetos. | ||
| View original record | X4021 6 6.28. Roy/Dn. informs us that the 2 special Watford aero magnetos recently ordered by Rg. at our request are to cost £80. each. EFC. | ||
| Scan125 | Covering letter regarding the arrival of two 12 Cylinder Magnetos ordered from Messrs. North & Sons. | ||
| View original record | Hs. c. to EFC. c. to Rg. c. to EY. X4021 Roy/Dn1/EH12.7.28. We attach hereto copy of a letter which we have received from Messrs. North & Sons, with reference to the pair of 12 Cylinder Magnetos… | ||
| Scan126 | Letter from North & Sons, Limited regarding the completion and dispatch of two Watford 12 Cylinder Magnetos. | ||
| View original record | COPY. NORTH & SONS, LIMITED. WHIPPENDELL ROAD, WATFORD. Roy/AW36/IN. CHK/DEW.4. 9th July, 1928. Messrs. Rolls-Royce Ltd., DERBY. Dear Sirs, Your Order 77364. 12.5.28. In further reply to your letter… | ||
| Scan127 | Wording of labels and instructions for 12-cylinder magnetos. | ||
| View original record | Wording of labels on Rolls 12 cylinder Magnetos. ----------------------- Watford 12 Cylinder Magnetos. Radial Leads. To fit cables, remove screen nuts and split pins from side bolts only. ----------… | ||
| Scan128 | Form recording the design and performance details of a magneto. | ||
| View original record | Y4021 FORM OF RECORDING DETAILS OF MAGNETO DESIGN AND PERFORMANCE. Date:- 19-7-28 Magneto on test :- Make:- Watford X. No.:- X4021 Type :- I.S.12 No :- 98033 (1) Weight in pounds :- 16.56 (2) Remarks… | ||
| Scan129 | Specifications for 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 2° 52° R 34° 81° ADVANCE RETARD Make. 1° 33.5° Break. 52° 81° Make. 93° 125° Break. 142° 171° Range:- 30° Make ratio :- .539… | ||
| Scan130 | Test results for Endurance, Short circuit, and Open circuit, including a volt-speed curve. | ||
| View original record | -34- (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 4.16 .01040 800 7.57 .0095 1200 11.58… | ||
| Scan131 | Test report detailing primary ampere-speed curve data and spark characteristics at various speeds. | ||
| View original record | -4- (10) Closed circuit primary ampere-speed curve. Speed. Amperes. Speed. Amperes. 100 1.03 2000 1.59 200 1.25 2400 1.59 300 1.33 2800 1.59 400 1.37 3200 1.58 600 1.42 3600 1.57 800 1.47 1200 1.54… | ||
| Scan132 | Test results for contact breaker timing and primary point gap measurements. | ||
| View original record | -5- Contd. (14) Secondary milliamps :- Maximum :- 5.1 Minimum :- 2.9 (15) Primary point gap after previous tests :- .010" Primary point gap .016" Contact breaker timing. Make. Break. ADVANCE RETARD A… | ||
| Scan133 | Continuation page of a report regarding the silence of operation and tangential force. | ||
| View original record | -6- Contd. (16) Remarks re silence of operation :- [Section crossed out] (17) Tangential force :- not taken. EFC. | ||
| Scan134 | Bench test report on modified 30° range Watford IS 12 aero magnetos, comparing their performance to B.T.H. magnetos. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8 12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.7.C. Order No.: WD 2. Customer's No.: X 4021 Modified 30° range Watford IS 12 aero magnetos We have now bench tested… | ||
| Scan135 | Report comparing the performance of a Watford magneto against a B.T.H. magneto. | ||
| View original record | RR 238 (150 BKS.) (DB 451-B 12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To (WD2 contd) Order No. Customer's No. 98033 one of the Watfords No 98033 was equally as good as one of the B.T.H. magneto… | ||
| Scan136 | Instructions on magneto wire windings and contact breaker timing for improved performance. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To (WD2 contd) .19 Order No. Customer's No. large number of turns of fine gauge wire whereas a lesser number of turns of a… | ||
| Scan137 | Comparison of screening methods for B.T.H magnetos, favouring the design by Messrs Norths to prevent wireless interference. | ||
| View original record | RR 238 (150 BKS.) (DB 561-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To (WD2 contd) Order No. Customer's No. 19__ B.T.H magnetos. We consider the scheme adopted by Messrs Norths for screening… | ||
| Scan138 | Instructions comparing a magneto distributor block's design to a B.T.H. model and its expected performance. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To (WD2 contd) 19 Order No. Customer's No. no screws inside the distributor block as on B.T.H, the starting magneto cable… | ||
| Scan139 | Contact breaker timing specifications for Watford IS.12 Aero Magnetos with latest modifications. | ||
| View original record | X 4021 14.8.28. CONTACT BREAKER TIMING OF WATFORD IS.12 AERO MAGNETOS (LATEST MODIFICATIONS 30° RANGE) No. 98033. | Advance | Retard. | |---|---| | Make | 2° | 34° | | Break | 52° | 81° | Make ratio… | ||
| Scan140 | Performance and high price of newly received Watford 12-cylinder aero magnetos. | ||
| View original record | Rg. from EFC. c. EY. Hs. X4021 EFC3/T6.9.28. WATFORD 12-CYLINDER AERO MAGNETOS. Recently we received one pair of up-to-date 12-cylinder aero magnetos from the Watford Co., and we have made the… | ||
| Scan141 | Fitting a pair of Watford IS12 aero magnetos to a development engine for testing. | ||
| View original record | X4021 To RHC. from EFC. c. Hs/CEP. c. Hs/VH. EFC5/T2.9.28. WATFORD IS12. AERO MAGNETOS. We have a pair of these magnetos Nos.98033/4 with the latest modifications, and we would like these to be… | ||
| Scan142 | The performance and improvements of the latest Watford IS12 aero magnetos, with a comparison to B.T.H. models. | ||
| View original record | To R. from EFC. c. BJ. RG. c. BY. X4021 EFC3/T10.9.28. X.4021. WATFORD TYPE IS12. MAGNETOS- AERO. -LATEST MODELS- We recently received two of the latest and considerably improved Watford IS12.aero… | ||
| Scan143 | Comparison of a new magneto's performance and screening method against existing B.T.H. types. | ||
| View original record | -2- Contd. testing of the electrical performance, the magneto (No.98033) with a larger make-ratio and timed earlier giving a better lowe speed performance whilst not losing much at high speeds, i.e.… | ||
| Scan144 | Requesting feedback on Watford Type IS12 magnetos tested on a development light alloy engine T49. | ||
| View original record | Y4021 To Hs/VH. from EFC. EFC3/T15.10.28. WATFORD TYPE IS12.MAGNETOS. We should like to have your impression to date of the two magnetos of the above type which we recently handed over for test on… | ||
| Scan145 | Quotation from Messrs. North & Sons Ltd. for 'R' Engine Magnetos, including weight, price, and delivery details. | ||
| View original record | X.4021. BY. c. to Rg. c. to Hs. Roy/Dn3/H19.1.29. "R" Engine Magnetos. SP12/5 We have this morning received a letter from Messrs. North & Sons Ltd., with reference to their Magnetos for the above… | ||
| Scan146 | Fitting Watford magnetos to an F engine for a D.H.9A aircraft. | ||
| View original record | X4021 Hs. Rg4/LW.29. 1. 29 RECEIVED Mr. Beilby telephones that Captain Forsyth told him that we can fit Watford magnetos on the F. engine in the D.H.9A. I do not know if you had asked for this. Hs Rg.… | ||
| Scan147 | The performance of Watford magnetos on F. engines after a 120-hour test run. | ||
| View original record | To R. From Hs. Y4021 c. to Sg. Wor. c. to RG. E. c. to BY. Hs/VHl/LG23.2.29. WATFORD MAGNETOS ON F. ENGINES. Numbers R.H. 98034. L.H. 98033. These magnetos have now run 120 hrs. on RR. F. engines… | ||
| Scan148 | The satisfactory condition of Watford Aero Magnetos type I.S.12 following a 120-hour test. | ||
| View original record | X4021 To R: from EFC. c. to Sg. Mor. c. to E. BY. EFC1/LG25. 2. 29. ---------------- WATFORD AERO MAGNETOS - TYPE I.S.12. ------------------------------------ Further to our EFC3/T10.9.28 and… | ||
| Scan149 | Electrical experimental record sheet for a Watford aero magneto type IS12 NO 83132. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS X4021 X.&No:- 4021 Watford aero magneto type IS12 NO 83132 Date on. Location. Date off. REMARKS. Miles reading start. Miles reading finish. Miles covered. Total… | ||
| Scan150 | Electrical experimental record sheet for a Watford aero magneto type IS12 N083133. | ||
| View original record | X4021 ELECTRICAL EXPERIMENTAL RECORD SHEETS X.&No.:- 4021 Watford aero magneto type IS12 N083133 Date on. | Location. | Date off. | REMARKS. | Miles reading Start. | Miles reading Finish. | Miles… | ||
| Scan151 | Electrical experimental record sheet for a Watford aero magneto, type IS12, No. 83119. | ||
| View original record | X 4021 ELECTRICAL EXPERIMENTAL RECORD SHEETS X.&No:- 4021 Watford aero magneto type IS12 NO 83119 Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles… | ||
| Scan152 | Electrical experimental record sheet for a Watford aero magneto type TS12. | ||
| View original record | X4021 ELECTRICAL EXPERIMENTAL RECORD SHEETS X.&No:- 4021 Watford aero magneto type TS12 NO 83/20 Date on. Location. Date off. REMARKS. Miles reading start. Miles reading finish. Miles covered. Total… | ||
| Scan153 | The return of a pair of Watford I.S.12 magnetos to the makers for reconditioning and testing. | ||
| View original record | To Dy. from Hs/CEP. c. to D/BP. c. to EFC. c. to G/Mt. X4021 Hs/CEP2/BE21.2.29. RE: WATFORD I.S.12. MAGNETOS - 0/54744 We are to-day sending into the Stores:- One pair of Watford I.S.12. Screened… | ||
| Scan154 | Performance test results for Magneto No 98034 and No 98033. | ||
| View original record | X. 4021. Rolls Royce 28 Feb 29 Magneto No 98034 5.5 m/m dist gaps. 6 ft. braided cables F.A. | 100 RPM. 15°R | 150 " 25°R | 270 " 30°R | 360 " Magneto No 98033 F.A. | 100 RPM. 15°R | 140 " 25°R | 300… | ||
| Scan155 | The sourcing of a Watford Magneto for aero engines, advocating for a second, British supplier. | ||
| View original record | RG. ) FROM R. HS. ) (At Le Canadel.) ETC. ) X4021 R5/M2.3.29. REC'D AT WW. 5.3.29. e. to SG. WOR. C. F. AERO ENGINES. WATFORD MAGNETO. I am pleased that this has done so well because - (1) We need a… | ||
| Scan156 | Issues with modified B.T.H. magnetos and the subsequent request to fit Watford magnetos on an 'F' Type engine. | ||
| View original record | Y4021 EP. Rg. Hs. EFC. Mr. Smithdale. Mr. Wilkins A.I.D. BY/Cghl/G.5.3.29. 'F' TYPE ENGINE - M. S/C. TYPE TEST. X3832 We have had a telephone communication from the Air Ministry in regard to the… | ||
| Scan157 | Cancellation of a memo regarding fitting Watford magnetos to an 'F' Type engine for a type test. | ||
| View original record | EP. Rg. Hs. EFC. Mr. Smithdale. Mr. Wilkins A.I.D. X4021 BY/Cgh6/G.5.3.29. 'F' TYPE ENGINE - M. S/S. TYPE TEST. --------------------------------------- With reference to BY/Cgh1/G.5.3.29. although the… | ||
| Scan158 | Test report for two Watford IS12 Aero Magnetos (Nos. 98033/4) after an overhaul and bench test. | ||
| View original record | YU021 EFC. WD41. 6.3.29. WATFORD IS12 AERO MAGNETOS NOS.98033/4. These two magnetos have now been returned to us after overhaul by Messrs. Norts, to be fitted to type test engine F14-MS-13. We have… | ||
| Scan159 | The transfer of I.S.12 magnetos which are Air Ministry property. | ||
| View original record | X.4021 G/Ait. c. to EFC. c. to HHG/SEP. c. to Mr. Wilkins A.I.D. Roy/Dn7/FH10.4.29. With reference to the I.S.12 Magnetos Nos. R.H. 83132 and L.H. 83133 lying in Receiving Stores, awaiting O.O.… | ||
| Scan160 | Inspection report on two Watford IS.12 Aero Magnetos that were not altered to the required 300° range. | ||
| View original record | Mr. Wilkins (A.I.D.) c. Rg. c. Hs/CEP. c. Roy/Dn. X4021 EFC2/T15.4.29. WATFORD IS.12 AERO MAGNETOS. Nos. 83132/3. In accordance with Roy/Dn7/BH10.4.29, we have duly received these two magnetos. We… | ||
| Scan161 | Limited 15° range of reconditioned Watford I.S.12.Aero magnetos and a proposal for their conversion to 30°. | ||
| View original record | Y4021 9 MR. ROWLEDGE. MR. CLARKE MR. DAYMAN MR. HIVES. MR. PRIESTLEY MR. ALLEN A.I.D. APRIL 17th.1929 W/HB/E9 WATFORD I.S.12.AERO MAGNETOS 83132/3 The above magnetos were sent here by the Air Ministry… | ||
| Scan162 | Limited range of reconditioned magnetos and a proposal for their conversion. | ||
| View original record | X4021 A. M. FORM 1084. AERONAUTICAL INSPECTION DIRECTORATE. MEMORANDUM. No. 10 From INSPECTOR IN CHARGE A.I.D. To MR. ELLIOTT. [Struck through] MR. HARDY. [Struck through] MR. HIVES. [Ticked] After… | ||
| Scan163 | The required 30° range for Watford I.S.12 magnetos. | ||
| View original record | Mr. Wilkins, A.I.D. c. EFC. c. Hs. c. Roy/Dm. c. Hs/CBP. c. Mr. Amey, A.I.D. X4021 Rg4/LW.19. 4. 29 WATFORD I.S.12 MAGNETOS 83132/3. Referring to your note, W/HB/E9, dated April 17th, in connection… | ||
| Scan164 | Requesting the type test report specifies the materials used for gear wheels in the Watford I.S.12 magnetos on engine No.13. | ||
| View original record | X4021 17 Mr. Rowledge, Mr. Platford, Mr. Hives, Mr. Amey A.I.D. April 22nd, 1929. W/HB/R 95. WATFORD MAGNETOS ON TYPE TEST ENGINE NO.13. Several materials have been used for the gear wheels in the… | ||
| Scan165 | Return of Watford IS.12 magnetos from a test engine for material examination of the distributor gears. | ||
| View original record | X4021 To EP. from EFC. EFC1/T23.4.29. WATFORD IS.12 MAGNETOS. A pair of these magnetos Nos.98033/4 is fitted to type test engine No.13. These should be returned to us after the test for examination as… | ||
| Scan166 | The material of distributor wheels for Watford magnetos on Type Test Engine No. 13. | ||
| View original record | X4021 To Mr. Wilkins (A.I.D.) c. Rg. c. EP. c. Mr. Amey (A.I.D.) EFCB/T23.4.29. WATFORD MAGNETOS ON TYPE TEST ENGINE NO.13. MATERIAL OF DISTRIBUTOR WHEELS. We do not know the material of the… | ||
| Scan167 | Cover note for a report on preliminary bench tests of Watford IS12 aero magnetos. | ||
| View original record | X4021 Rg. from EFC. c. EP. c. Hs. EFC7/T23.4.29. WATFORD IS12 AERO MAGNETOS NOS.98033/4. Please find attached copy of our report WD41 dealing with preliminary bench tests of these magnetos before they… | ||
| Scan168 | Instructions regarding the bench testing of two overhauled Watford IS12 aero magnetos. | ||
| View original record | RR 228 (150 BKS.) (DB 451-8. 12. 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.7.C. Date: 6 - 3 - 1929 Order No.: WD41. Customer's No.: X 4021 Watford IS12 aero magnetos Nos 98033/4. These two… | ||
| Scan169 | Instructions and results for a type test, detailing adjustments to a safety gap and electrical performance figures. | ||
| View original record | RR 238 (150 BKS.) (D9.461-8-12-24) MP 206975 ROLLS-ROYCE LTD. INSTRUCTIONS. (2) 19 To Order No. WD41 (Contd) Customer's No. the actual type test and if necessary we can remove the cover and open out… | ||
| Scan170 | The despatch of two Air Ministry magnetos for timing range modification. | ||
| View original record | X4021 [Text crossed out] C. to C/WG. C. to O/WH. C. to HS. C. to BFC. Roy/Dnl1/PH29.4.29 Will you please despatch to North & Sons Whippendell Road, Watford, by passenger train, two I.S.12 Magnetos… | ||
| Scan171 | Seeking instructions for the disposition of Watford aero magnetos. | ||
| View original record | To Mr. Wilkins A.I.D. from EFC. c.to RC. X 4021 EFC2/M16.5.29 WATFORD AERO MAGNETOS I S 12. Of the original 8 Watford aero magnetos Nos. 83119/20, 83132/3/4/5/6/7 you may recall that 4 of these… | ||
| Scan172 | Request to order two distributor terminal spanners for Watford aero magnetos from Messrs. North & Sons. | ||
| View original record | X4021 EFC is absent Roy/Dn. from EFC/HEW. EFC/HEW5/A11 2.6.29. I S.12 Will you please order for us from Messrs. North & Sons, two distributor terminal spanners for tightening up the H.T. terminal… | ||
| Scan173 | The modification and allocation of Watford Aero Magnetos. | ||
| View original record | X4021 Mr. Jacques A.I.D. from EFC. c. Rg. EFC2/AD6.7.29. X.4021. WATFORD AERO MAGNETOS. I S 12. We have now in our possession four of the original eight Watford magnetos Nos. 83119/20 and 83132/3… | ||
| Scan174 | The examination of Watford IS.12 Aero Magnetos after a failed type test. | ||
| View original record | X4021 EP/AGR. from EFC. EFC6/AM.7.7.29. WATFORD IS.12 AERO MAGNETOS NOS.98033/4. Will you please note that these magnetos should be sent into this dept. upon the completion or otherwise of the type… | ||
| Scan175 | Enquiry response detailing the materials of gear wheels in dismantled Watford IS.12 Aero Magnetos. | ||
| View original record | X4021 MR. Jacques A.I.D. from EFC. c. to Mr. Herriot A.I.D. EFC1/AD19.8.29. X.4021. WATFORD IS.12 AERO MAGNETOS Nos. 98033/4 ex F.14-13. As a result of an enquiry by the A.I.D. as to the material of… | ||
| Scan176 | The condition of disassembled Watford IS. 12 Aero Magnetos from test engine F.14/MS13. | ||
| View original record | Rg. from EFC. c. EP. c. Ey. X4021. EFC2/AD20.8.29. X.4021. WATFORD IS. 12 AERO MAGNETOS NOS.98033/4. EX TYPE TEST ENGINE F.14/MS13. These magnetos have been dis-assembled for examination subsequent to… | ||
| Scan177 | Test report on Watford IS12 aero magnetos following a 53-hour run on a 714S-13 engine. | ||
| View original record | RR 228 (150 BKS.) (DD 451-8-12-24) MP 306975 X4021 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.T.C. 19 - 9 - 1929 Order No WD78 Customer's No. X4021 Watford IS12 aero magnetos. A pair of these magnetos Nos.… | ||
| Scan178 | Page 2 of instructions detailing a magneto's superior features and test performance on an 'R' development engine. | ||
| View original record | RR 226 (150 BKS.) (DB.461-9-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (2) 19 To Order No. WD78 (contd) Customer's No. magneto is definitely established particularly as it embodies several… | ||
| Scan179 | Recommendation to use magnetos from the British manufacturer Messrs Norths over the American-controlled B.T.H. | ||
| View original record | RR 228 (150 BKS.) (DB 461-8-12-24) MP 300975 ROLLS-ROYCE LTD. INSTRUCTIONS. (3) To_____________________19__ Order No. WD78 (contd) Customer's No. __________ may desire or suggest and states that they… | ||
| Scan180 | Comparison between B.T.H. and Watford magnetos of lightened type for 'R' engines. | ||
| View original record | X4021 To R. from EFC. c. Sg. c. E. Wor. c. Ev. Rg. c. EP. Hs. EFCl/AD20.9.29. X.4513. B.T.H. AND WATFORD MAGNETOS OF LIGHTENED TYPE ON OR FOR "R" ENGINES Handwritten notes: X4021 X2832 X4513w X4513a… | ||
| Scan181 | Weaknesses observed in magnetos on 'R' engines, caused by the use of magnesium alloy. | ||
| View original record | -2- this alloy in the case of their machines. Until about three weeks before the Race the behaviour of these magnetos on "R" engines was very good, the machines giving no trouble with the exception,… | ||
| Scan182 | The inspection of magnetos, discussing faults, the use of magnesium alloy, and performance after a race. | ||
| View original record | -3- Assisted by one or two visits from B.T.H. representatives, steps were taken to make critical examinations of all the magnetos in question for similar faults, and in one or two other cases similar… | ||
| Scan183 | The testing and performance of Watford magnetos for 'F', 'H', and 'R' type engines. | ||
| View original record | X4021 To R. from EFC. c. Sg. c. E. Wor. c. Ey. Rg. c. EP. Hs. Roy. EFC2/AD20.9.29. WATFORD MAGNETOS OF "F" AND "H" ENGINE TYPE X4021 X4513W AND OF LIGHTENED TYPE FOR "R" ENGINES. General reference has… | ||
| Scan184 | Report comparing Watford, B.T.H., and Messrs. North aero magnetos, recommending the use of North's products. | ||
| View original record | -2- Also the pair of Watford aero magnetos we used on an "R" development engine, apart from some screws which were not properly locked working loose, functioned O.K. without a hitch and were in… | ||
| Scan185 | Suggesting the standardisation of Watford magnetos on aero engines, citing dissatisfaction with B.T.H. magnetos. | ||
| View original record | Hs. Rg. EFC. c. Sg. c. Wor. X4021 By 5/G24.9.29. X 4513W. AERO ENGINE MAGNETOS. In view of EFC2/AD20.9.29. we would suggest that the time has arrived for issuing a standardisation sheet covering the… | ||
| Scan186 | Table listing the status and allocation of 'R' Aero Engine Magnetos. | ||
| View original record | X4021. 25.9.29. X.4513B. X.4021. R.R. "R" AERO ENGINE MAGNETOS. B.T.H. TYPE SC.12/9 R.H. L.H. Remarks Engine allotted to. {B.5216 B.5204 Loose poles R.3 {B.5218 B.5202 O.K. O.K. Spares {B.5220 B.5208… | ||
| Scan187 | List of Watford Aero Magnetos, detailing their type, serial numbers, and status. | ||
| View original record | X. 4021. 29.10.29. WATFORD AERO MAGNETOS. Type No. (R.H.) No. (L.H.) Remarks. I.S.12 (old type) 83134 Obsolete type I.S.12 83135 " I.S.12 83136 83137 " SP.12-1 83120 83119 Modified magnetos in new… | ||
| Scan188 | Requested modifications for Watford IS12 magnetos following a visit to a supplier. | ||
| View original record | X4021 To Roy. from EFC. c. G/Mt. c. Hs/CEP. EFC1/BELL.11.29. X.4021 WATFORD IS12. MAGNETOS During a visit to Messrs. North & Sons, on Friday 8th, inst. we arranged with them to have back for slight… | ||
| Scan189 | Letter regarding the return and modification of Watford I.S.12 aero magnetos. | ||
| View original record | X4021. EFC3/AD. 11th November, 1929. Messrs. North & Sons, Ltd. Whippendell Rd., Watford. Dear Sirs, Watford I.S.12. Magnetos. We thank you for the courtesy and attention shewn to our two… | ||
| Scan190 | Page 2 of a letter to Messrs. North & Sons, Ltd. regarding arrangements for the return of magnetos. | ||
| View original record | Messrs. North & Sons,Ltd., Whippendell Rd., Watford. 11th November, 1929. -2- The necessary arrangements for the return of these magnetos are being made. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||
| Scan191 | Letter to Messrs. North & Sons, Ltd. regarding the dispatch and return sanction for Watford L.S.12 Magnetos. | ||
| View original record | X.4021. EFC1/AD. 12th November, 1929. Messrs. North & Sons,Ltd., Whippendell Rd., Watford. Dear Sirs, Watford L.S.12. Magnetos. Referring to the above magnetos, further than that contained in our… | ||
| Scan192 | The return of Watford IS12 magnetos for slight modifications. | ||
| View original record | X4021 To Roy. from Hs/CEP. c. to G/Mt. c. to EFC. c. to Mr.Jaques(A.I.D.) c. to D/BF. Hs/CEP4/BE12.11.29. RE: WATFORD IS12. MAGNETOS Further to EFC1/BE11.11.29. instructing for Watford IS12 Magnetos… | ||
| Scan193 | Return of specific Watford type magnetos to Messrs. North for modification. | ||
| View original record | X4021. To D/BP. from Hs/CEP. c.c. G/AS. c. EPC. c. [text struck through] (A.I.D) Hs/CEP1/BE19.11.29. In accordance with memo reference D/BP/N10/B. 18.11.29. We are arranging to send into the Stores… | ||
| Scan194 | Tooling costs, pricing, and supply arrangements for Watford I.S.12 magnetos for aero engines. | ||
| View original record | X4021. To RG. from ROY. c. to WDR. [strikethrough] c. to HY. [strikethrough] c. to HS. [strikethrough] c. to EFC. [strikethrough] ---------------- [Stamped: 1929] [Stamped: RECEIVED] ROY4/MG26.11.29… | ||
| Scan195 | Inquiry to Messrs. North & Sons, Ltd. regarding the ownership history of four Watford type IS.12 Aero Magnetos. | ||
| View original record | X4021 EFCl/AD. 3rd December, 1929. Messrs. North & Sons,Ltd., Whippendell Rd., Watford. Dear Sirs, Watford type IS.12. Aero Magnetos Nos.83134/5/6/7. The question of the exact ownership of these four… | ||
| Scan196 | Strategy for ordering Watford and B.T.H. magnetos in consultation with the Air Ministry. | ||
| View original record | X 4021 Rg. c. Wor. c. HS. c. EFC. c. ROY BY2/G.4.12.29. WATFORD MAGNETOS. ROY4/MG. 26.11.29. Obviously we cannot at the moment instruct Messrs. Watfords either way, but if orders are forthcoming then… | ||
| Scan197 | Letter from North & Sons, Ltd. confirming the supply details for Watford Type IS.12 Aero Magnetos. | ||
| View original record | EFC X4021 SPEEDOMETERS THE BRITISH MADE Watford & MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 472 & 823 WATFORD. CONTRACTORS TO THE ADMIRALTY, WAR… | ||
| Scan198 | Standardisation of Watford 12-cylinder aero magnetos type IS.12 for 'F' engines. | ||
| View original record | R.R. 756 (10H) (D.G. 114. 5-5-29). J.H., LTD. X4021. COMPLETED 16.12.29. STANDARDISATION OF AERO ENGINE PARTS Date: 7.11.29. Description of Parts. Watford 12-cylinder aero magnetos type IS.12. for… | ||
| Scan199 | Letter to Messrs. North & Sons, Ltd. outlining suggestions for magneto investigation and development. | ||
| View original record | X4021 EFC2/AD. 17th December, 1929. X430 Messrs. North & Sons, Ltd., Whippendell Rd., Watford. Dear Sirs, We would like to refer to one or two miscellaneous points taken up with you during the visit… | ||
| Scan200 | Letter to Messrs. North & Sons, Ltd. regarding the results of EW6A magnetos using contact breakers with tungsten points. | ||
| View original record | Messrs. North & Sons, Ltd. Whippendell Rd., Watford. 17th December, 1929. -2- We think we have already informed you that we are so far, very pleased with the results of EW6A magnetos using contact… | ||
| Scan201 | Letter to North & Sons Ltd. regarding the ownership and return of four magnetos sold to the Air Ministry. | ||
| View original record | X4021. EFC3/AD. 17th December, 1929. Messrs. North & Sons, Ltd., Whippendell Rd., Watford. Dear Sirs, IS.12. Magnetos Nos.83134/5/6/7. We thank you for yours ref. HWJ/DD. of December 9th. We have… | ||
| Scan202 | Meeting to discuss modified Chassis Magnetos and the return of 12-cylinder Aero Magnetos for testing. | ||
| View original record | X4021 To BY. from ROY. c. to Rg. c. to Hs. c. to EFC c. to MX. ROY32/MG3.1.30 MAGNETOS Kindly note Mr. Kirby and Mr. Allen propose coming through on Tuesday next, the 7th instant, to discuss Magneto… | ||
| Scan203 | Modifications made to a pair of magnetos for the forthcoming 'F' engine type test. | ||
| View original record | Ry. from EFC. c. Ry/EL. c. Rg. X4021 EFC7/ADS.1.30. X.4021 MAGNETOS FOR FORTHCOMING "F" ENGINE TYPE TEST. Will you please note that as arranged at our conference on Tuesday with Messrs. Kirby and… | ||
| Scan204 | Letter to Messrs. North & Sons, Ltd. confirming points regarding various Watford Aero Magnetos. | ||
| View original record | X 4021 c. Ev. c. Rg. c. Mailing. EFCl/AD. 10th January, 1930. X4021 Messrs. North & Sons, Ltd. Whippendell Rd., Watford. Dear Sirs, Watford Aero Magnetos. Confirming the various points gone over… | ||
| Scan205 | Letter to Messrs. North & Sons, Ltd. detailing the differences between magneto types SP.12-5 and SP.12-2. | ||
| View original record | Messrs. North & Sons,Ltd. Whippendell Rd. Watford. 10th January, 1930. -2- Magnetos type SP.12-5 Nos.98087/8/9/90. The difference between these magnetos and the SP.12-2 type, and their suitability for… | ||
| Scan206 | Letter to North & Sons Ltd. regarding necessary alterations to F.14 type engine magnetos before a type test. | ||
| View original record | X4021 C. By. C. Ey. C. Houlding. EFC3/AD. 10th January, 1930. Messrs. North & Sons.Ltd. Whippendell Rd., Watford. Dear Sirs, Watford Aero Magnetos. Further to our EFC1/AD. of today's date, and with… | ||
| Scan207 | Letter from North & Sons Ltd regarding the modification of Watford Aero Magnetos. | ||
| View original record | SPEEDOMETERS & MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, CROWN AGENTS FOR THE COLONIES, INDIA OFFICE. TELEPHONES: LONDON 1846… | ||
| Scan208 | Letter from North & Sons Ltd. regarding the materials used for specific Watford Aero Magnetos. | ||
| View original record | X4021 SPEEDOMETERS & MAGNETOS. THE BRITISH MADE Watford NORTH & SONS, LTD. WHIPPENDALL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. CONTRACTORS TO THE ADMIRALTY, WAR… | ||
| Scan209 | Watford Aero Magnetos, including the return of two units for modification and comments on the use of magnesium versus aluminium alloy for parts. | ||
| View original record | To Ev. from EFC. " Rg. X4021. EFCl/AD16.1.30. X.4021. WATFORD AERO MAGNETOS. In answer to our two letters both of the 10th inst. EFCl/AD and EFC3/AD. to Messrs.North & Sons, on the subject of Watford… | ||
| Scan210 | Instructions to despatch a pair of Watford Aero Magnetos for a contact breaker base plate change. | ||
| View original record | X4021 Roy. from EFC. c. Despatch Stores. EFC2/AD16.1.30. X.4021. WATFORD AERO MAGNETOS. We are sending into the Stores :- One pair of Watford magnetos Nos.98033/4 Will you please arrange for these to… | ||
| Scan211 | Letter to Messrs. North & Sons regarding the change of magneto parts from magnesium to aluminium alloy for Sir Henry Segrave's 'Miss England' engine. | ||
| View original record | X4021 EFCS/AD. 17th January, 1930. Messrs. North & Sons,Ltd. Whippendell Rd. Watford. Dear Sirs, Watford Magnetos Type SP.12-5 Nos.98088/90. We duly received yours ref. CHK/HWJ. of the 14th inst. with… | ||
| Scan212 | Instruction to despatch two Watford SP.12-5 magnetos to Messrs. North and change parts from magnesium to aluminium alloy. | ||
| View original record | X4021 Roy. from EFC. c. Despatch Stores. EFC4/ADL7.1.30. X.4021. WATFORD SP.12-5 MAGNETOS. We are sending into the Stores for despatch to Messrs.North - Two SP.12-5 magnetos Nos.98088/90 (R.R.… | ||
| Scan213 | Letter to Messrs. North & Sons, Ltd. chasing the return of two modified magnetos for an aero engine. | ||
| View original record | X4021 EFC5/AD. 28th January, 1930. Messrs. North & Sons,Ltd. Whippendell Rd. Watford. Dear Sirs, SP.12-2 Magnetos Nos.98033/4. We are very anxious for the quick return of the above two magnetos sent… | ||
| Scan214 | Letter to Messrs. North & Sons, Ltd. requesting clarification on the correct type designations for aero magnetos. | ||
| View original record | X4021. EFC1/AD. 31st January, 1930. Messrs. North & Sons,Ltd. Whippendell Rd. Watford. Dear Sirs, Aero Magnetos. There is some little confusion here regarding the correct type designations of the aero… | ||
| Scan215 | Letter to North & Sons Ltd. regarding a modification needed for Watford Aero Magnetos due to an issue with the distributor range. | ||
| View original record | X4021. c. Rg. c. Mailing. EFC2/AD. 1st February, 1930. Messrs. North & Sons,Ltd. Whippendell Rd. Watford. Dear Sirs, Watford Aero Magnetos. Effect on distributor of change of range from 15° to 30°… | ||
| Scan216 | Letter from North & Sons clarifying the type numbering system for 12-cylinder aircraft magnetos. | ||
| View original record | E.F.C. SPEEDOMETERS X4021. THE BRITISH MADE Watford & MAGNETOS. NORTH & SONS, LTD. WHIPPENDALL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 692 & 623 WATFORD. CONTRACTORS TO THE ADMIRALTY,… | ||
| Scan217 | Letter from North & Sons Ltd. enclosing a catalogue of Aircraft Magnetos. | ||
| View original record | NORTH & SONS Ltd. Continuation Sheet No. 1 Messrs. Rolls-Royce Ltd. 3rd. Feb.1930. respects in accordance with those designated S.P.12-2. We are sending enclosed a copy of our catalogue of Aircraft… | ||
| Scan218 | The preliminary bench testing of Watford IS12 aero magnetos. | ||
| View original record | E.7.C X4021. X.NO. 3832. 4021. REF. NO. W.E.1. DATE 3-2-30 Watford IS12 aero magnetos. We have now tested preliminarily on the bench magnetos Nos 98033/4 of the above type prior to these being fitted… | ||
| Scan219 | Performance comparison and potential modification of various engine magnetos. | ||
| View original record | W.E.I contd. 2. No 83132 which we found to be better and equal in performance to No 98033. However we have handed this pair (Nos. 98033/4) over for the engine and we now suggest asking EP's men to… | ||
| Scan220 | Requesting special observation of a specific magneto during a 100-hour engine test due to unequal performance. | ||
| View original record | X4021. To EP. from EFC. EFC1/AD5.2.30. X.4021. WATFORD IS.12 MAGNETOS NOS.98033/4. HANDED OVER FOR TYPE TEST "F" ENGINE. We desire that you should ask your men in charge of the Type Test particularly… | ||
| Scan221 | Acceptance test log for Watford Aero Magnetos to an abridged specification. | ||
| View original record | WATFORD AERO MAGNETOS. X.4021. ACCEPTANCE TEST TO ABRIDGED SPECIFICATION. Date. | Magneto No. | (1) Remarks. | (2) Remarks. | (3) Min. sparking speeds. (a), (b), (c) | (4) Remarks.… | ||
| Scan222 | Request for test results on Watford & B.T.H. aero magnetos conducted at Farnborough. | ||
| View original record | X4021 RG. from EFC. EFC5/AD6.2.30. X.4021 X.3832. WATFORD & B.T.H. AERO MAGNETOS. Would it be possible to obtain results of tests made under the direction of Dr. Bairsto at Farnborough on the latest… | ||
| Scan223 | Status and testing of Watford IS.12 aero magnetos. | ||
| View original record | X4021. By. from EFC. c. Rg. EFC2/AD7.2.30. X.4021 X.3832 AERO MAGNETOS. With regard to your recent memo, concerning in particular, Watford aero magnetos, probably due to your having overlooked the… | ||
| Scan224 | The despatch of a faulty magneto and ordering modified contact breaker covers. | ||
| View original record | X4021. To Roy. from EFC. c. Despatch Stores. EFC8/ADL3.2.30. X.4021. WATFORD AERO MAGNETO No.98034. Will you please arrange for the despatch of the above magneto to Messrs.North by passenger train… | ||
| Scan225 | Letter from North & Sons regarding an investigation into rotor electrode positions in relation to distributor segments for a Magneto. | ||
| View original record | X4021 SPEEDOMETERS THE BRITISH MADE Watford & MAGNETOS. NORTH & SONS, LTD. WHIPPENDALL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 592 & 623 WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON.… | ||
| Scan226 | Letter to Messrs. North & Sons, Ltd. regarding the underperformance of an IS.12 magneto and its urgent return for improvement. | ||
| View original record | X4021 EFC9/AD. 13th February, 1930. Messrs. North & Sons, Ltd. Whippendell Rd. Watford. Dear Sirs, As we rather anticipated from the results of our bench test, the performance of IS.12 magneto… | ||
| Scan227 | A.I.D. objection regarding Watford magnetos for an F. Type Test. | ||
| View original record | X4021 To EP. from EFC. EFC6/AD13.2.30. X.4021. WATFORD MAGNETOS ON F. TYPE TEST. We understand the A.I.D. have offered objection to the fact that the contact breaker covers on these magnetos can move… | ||
| Scan228 | Letter to a supplier regarding an issue with modified aero magneto contact breaker cover clips. | ||
| View original record | X4021. EFC4/AD. 13th February, 1930. X4513W. Messrs. North & Sons, Ltd. Whippendell Rd, Watford. Dear Sirs, Type SP.12-2 Watford aero magnetos with modified contact breaker cover clip. On the two… | ||
| Scan229 | Letter to Messrs. North & Sons.Ltd concerning the incorrect safety gap length on IS.12 type aero magnetos. | ||
| View original record | X4021 EFC8/AD. 14th February, 1930. Messrs. North & Sons.Ltd. Whippendell Rd. Watford. Dear Sirs, With further reference to the sparking performance of the IS.12. type aero magnetos, you may remember… | ||
| Scan230 | Letter to Messrs. North & Sons, Ltd. regarding modifications and test results for various machines and magnetos. | ||
| View original record | Messrs. North & Sons, Ltd. Whippendell Rd. Watford. 14th February, 1930. -2- point rectifying on the machine No.98034 sent to you last thing yesterday before this machine is returned to us. We have… | ||
| Scan231 | Letter to Messrs. North & Sons, Ltd. requesting a box or tubular type spanner for B.T.H. magnetos. | ||
| View original record | X4021 EFC3/AD. 15th February, 1930. Messrs. North & Sons,Ltd. Whippendell Rd. Watford. Dear Sirs, Spanner for High Tension Terminal Heads of B.T.H. SC.12-7 & 9 Magnetos. You may recall that recently… | ||
| Scan232 | Letter to Messrs. North & Sons, Ltd. requesting blueprints for Aero Magnetos Type SP.12-2. | ||
| View original record | X4021. EFC3/AD. 17th February, 1930. Messrs. North & Sons,Ltd. Whippendell Rd. Watford. Dear Sirs, Aero Magnetos Type SP.12-2 We should be obliged if you could provide us with two up-to-date blue… | ||
| Scan233 | Letter to Messrs. North & Sons Ltd. regarding issues and suggestions for Watford Aero Magnetos. | ||
| View original record | X4021 c. EP. (for your personal information) c. Mailing. EFCl/AD. 19th February, 1930. Messrs. North & Sons, Ltd. Whippendell Rd. Watford. Dear Sirs, Watford Aero Magnetos. We desire to place on… | ||
| Scan234 | Report investigating magneto safety gap sparking issues, comparing Watford and B.T.H. models. | ||
| View original record | Messrs. North & Sons, Ltd. Whippendell Rd. Watford. 19th February, 1930. -2- not occurring only at high speeds and for this reason it was suspected that it was due to sparking over at the safety gap.… | ||
| Scan235 | Letter to Messrs. North & Sons, Ltd. concerning magneto rotor dimensions and performance issues. | ||
| View original record | Messrs. North & Sons,Ltd. Whippendell Rd. Watford. 19th February, 1930. -3- In regard to the question of rotor dimensions we wrote you on this matter and you sent us in return a blue print copy… | ||
| Scan236 | Letter from North & Sons, Ltd. acknowledging a previous letter and enclosing two up-to-date copies of print No. N. 2200. | ||
| View original record | X4021 SPEEDOMETERS & MAGNETOS. THE BRITISH MADE Watford NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON.… | ||
| Scan237 | Letter to Messrs. North & Sons, Ltd. regarding out-of-date prints for a magneto scheme. | ||
| View original record | X4021 EFC2/AD. 21st February, 1930. Messrs. North & Sons,Ltd. Whippendell Rd. Watford. Dear Sirs, We duly received the two prints of SP.12-2 magneto scheme referred to in yours HWJ/VS. of the 20th… | ||
| Scan238 | Graph of short and open circuit ampere/volt-speed curves for the primary windings of Watford and B.T.H. aero magnetos. | ||
| View original record | X4021 SHORT CIRCUIT AMPERE-SPEED AND OPEN CIRCUIT VOLT-SPEED CURVES OF THE PRIMARY WINDINGS OF WATFORD AND B.T.H. AERO MAGNETOS O.C. VOLTS S.C. CURRENT (AMPERES) SPEED r.p.m. VOLTS AMPERES B.T.H. TYPE… | ||
| Scan239 | Blank document page with a purple ink stamp from the print room. | ||
| View original record | ROLLS-ROYCE PRINT ROOM 25 APR 1930 DERBY. | ||
| Scan240 | Comparison of B.T.H. aero magneto distributor dimensions with a suggestion for increasing overlap. | ||
| View original record | E.7.C X4021. Date 14-2-30 Ref No. W.E.6 X.NO. 3832. 4021 B.T.H aero magneto distributor and H.T. Rotor dimensions. We have measured in a similar way to the Watford magneto the dimensions of the… | ||
| Scan241 | Blueprint showing the setting of an electrode on a 12-cylinder magneto. | ||
| View original record | X4021. SETTING OF ELECTRODE ON 12CYL MAGNETO 30° A.T.D.R. 857-1 Issue No POSITION OF ELECTRODE RELATIVE TO SEGMENT AT FULL RETARD (30°) POSITION OF ELECTRODE RELATIVE TO SEGMENT AT FULL ADVANCE 8° 7… | ||
| Scan242 | Experimental bench test schedule detailing the design and performance of a Watford (aero) magneto. | ||
| View original record | X4021. MAGNETO TESTS TO EXPERIMENTAL BENCH TEST SCHEDULE DETAILS OF MAGNETO DESIGN AND PERFORMANCE. Date :- 18-2-30 Magneto on test :- Watford (aero) Maker :- Messrs North and Sons Ltd. X. No. :- 4021… | ||
| Scan243 | Specification sheet for contact breaker point gap, timing, and automatic advance characteristics. | ||
| View original record | -2- (4) Contact breaker point gap :- .013" Contact breaker timing :- | | Make. | Break. | |---|---|---| | A | 8° | 50° | | B | 39° | 80° | | | Retard. | Advance | |---|---|---| | Make | 38° | 7° | |… | ||
| Scan244 | Table of dimensions for a jump spark distributor. | ||
| View original record | -3- Distributor dimensions. | | Relative. | Absolute | | |---|---|---|---| | | | INCHES | DEGREES | | Pitch (P) = | 1.000 | .754 | 30 | | Make ratio (M) = | .462 | .348 | 13.9 | | Range (R) = | .338 |… | ||
| Scan245 | Electrical performance test results for endurance, short circuit, open circuit, and volt-speed curve. | ||
| View original record | -3a- (6) Endurance test :- OK (7) Short circuit test :- OK (8) Open circuit test :- OK NOTE ! all electrical perform- ance tests following were carried out using 6 feet long metal braided H.T. cables… | ||
| Scan246 | Test results for a closed-circuit primary ampere-speed curve and various sparking characteristics. | ||
| View original record | -4- (10) Closed circuit primary ampere-speed curve :- Speed. Amperes. Speed. Amperes. 100 1.06 2400 1.53 200 1.23 2800 1.54 300 1.28 3200 1.53 400 1.32 3600 1.52 600 1.36 800 1.41 1200 1.48 1600 1.51… | ||
| Scan247 | Specification sheet detailing secondary milliamps, contact breaker point gaps, and timing data. | ||
| View original record | -5- (15) Secondary milliamps :- Maximum :- 5.0 Minimum :- 3.0 (16) Contact breaker point gap. .017" Contact breaker timing. Retard. Advance. Make. 47° 16° Break. 84° 54° Make. 135° 104.5° Break.… | ||
| Scan248 | Remarks on silence of operation and tangential force measurements. | ||
| View original record | -6- (17) Remarks re silence of operation :- not necessary, (18) Tangential force :- 4.25 lbs wt. EFC. | ||
| Scan249 | How to obtain Air Ministry test reports on Watford and B.T.H. aero magnetos. | ||
| View original record | To RG. c. EFC. X4021 Lr1/H21.2.30. X3832 With reference to memo passed on to me - EFC5/AD6.2.30. re Watford and B.T.H. aero magnetos. I have been in touch with Dr. Bairstow and understand from him… | ||
| Scan250 | Letter requesting the results of Farnborough tests on Watford and B.T.H. Aero Magnetos. | ||
| View original record | X4021 Lr. from EFC. c. Rg. EFC5/AD25.2.30. X.4021. X.3832. WATFORD AND B.T.H. AERO MAGNETOS. Referring to your Lr1/H21.2.30, the particular results of Farnborough tests which we should be interested… | ||
| Scan251 | Letter from North & Sons, Ltd. acknowledging a letter and enclosing two copies of drawing N. 2200. | ||
| View original record | X4021 SPEEDOMETERS THE BRITISH MADE Watford & MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1546 GERRARD WORKS: 622 & 623 WATFORD. CONTRACTORS TO THE ADMIRALTY, WAR… | ||
| Scan252 | Progress report on the F.XIV.MS.39 engine type test after the second 10-hour run. | ||
| View original record | X4021. HOP CT-Br. R. (hold-over) Pr. HP. Hs. DT. EFC. WT. EP1/H26.2.30. X3196 PROGRESS REPORT. F.ENGINE TYPE TEST. ENGINE NO.F.XIV.MS.39. The second 10 hour run on the hangar was completed yesterday.… | ||
| Scan253 | The satisfactory performance of a new Case gas starter, noting a pressure reading and ongoing leaks. | ||
| View original record | - 2 - EP1/H26.2.30. The new Case starter is used each morning for starting up on the hangar and the results are very satisfactory A presmure gauge was fixed in the pipe leading from the gas starter to… | ||
| Scan254 | Modification and testing of Watford IS.12 magnetos, comparing them to B.T.H. magnetos. | ||
| View original record | X4021. To EP. from EFC. c. Rg. EFC2/AD26.2.30. X.4021. WATFORD IS.12. MAGNETOS NOS. 98033/4. In these two magnetos at present in your hands on Type test we increased the H.T. safety gap from 7.7 mm.… | ||
| Scan255 | Comparative bench test report on Watford and B.T.H. aero magnetos, with a performance summary table. | ||
| View original record | X4021 WE.8. 26.2.30. X.4021. X.3832. WATFORD AND B.T.H. AERO MAGNETOS. We have now completed comparative bench tests on an up-to-date Watford type IS.12 (now SP.12-2) magneto No.83132 and a B.T.H.… | ||
| Scan256 | Continued page detailing suggested modifications to Watford and B.T.H. magnetos. | ||
| View original record | -2- contd. Examining the open circuit volt and closed circuit ampere curves of the primary we observed that the Watford magnetic circuit is the better of the two but the primary winding appears to… | ||
| Scan257 | Letter of thanks to Messrs. North & Sons, Ltd. for two copies of Drawing No. N.2200. | ||
| View original record | X4021 EFCL/AD. 27th February, 1930. Messrs. North & Sons, Ltd. Whippendell Rd. Watford. Dear Sirs, Please accept our thanks for the two copies of Drawing No. N.2200 which you sent us at our request… | ||
| Scan258 | Progress report on the F.XIV.MS.39 engine type test, detailing the third 10-hour run, consumption data, and performance issues. | ||
| View original record | X4021 HORT C. Br. R. (Hold over). Her. He. EW. Hy. EFC. ET PROGRESS REPORT. F. ENGINE TYPE TEST. ENGINE NO. F.XIV.MS. 39. The third 10 hour run on the hangar was completed yesterday. Amount of running… | ||
| Scan259 | Engine inspection, ignition plug replacement, and planning for endurance and special tests. | ||
| View original record | - 2 - EPL/H27.2.30. Ignition plugs - No.5 B. inlet plug, signs of mica insulation burnt, and was replaced. Gear inspection - all fixing bolts O.K. Slack in the gear did not seem to be definitely… | ||
| Scan260 | Progress report on the F. Engine Type Test No.F. XIV.MS.39, detailing a 10-hour hangar test. | ||
| View original record | X4021. Hor. C. Br. R. (Hold-over) Dev. Hg. E.P.C.- EP3/H1.3.30. PROGRESS REPORT. F. ENGINE TYPE TEST. NO.F. XIV.MS.39. The fifth 10 hour test on the hangar was completed yesterday. Amount of running… | ||
| Scan261 | Noting an engine has been moved to a test bed to complete 30 hours of running. | ||
| View original record | - 2 - EF3/H1.3.30. We have now changed the engine over to the test bed so as to complete the remaining 30 hours running. EP. | ||
| Scan262 | Progress report for the F.Engine Type Test on engine number F.XIV.MS.39. | ||
| View original record | H & W X4021 Wor. C.E. R.(hold over) Hs. He. Hy. RFC. EP/Thn2/ H3.3.30. PROGRESS REPORT. F.ENGINE TYPE TEST. ENGINE NO.F.XIV.MS.39. A further 10 hours was run on the test bed on Saturday. Amount of… | ||
| Scan263 | Disagreeing with the alteration of the 'H' engine safety gap from 7.7 to 8.5 m/m. | ||
| View original record | X4021 14 MR. PLATFORD: MR. ROWLEDGE MR. COVERLEY. E.A.C. MARCH 4/30 J/HB/B16 I am returning herewith memo EFC/2/AD/28/2/30. I do not agree that it was at all desirable to alter the "H" engine safety… | ||
| Scan264 | The recommended timing settings for BTH and Watford aero magnetos. | ||
| View original record | X4021. 7.3.30. X 3832. X 4021. BTH. & WATFORD AERO MAGNETOS. Recommended timing :- M. B. A. -5 95 R. 55 155 --- --- --- B.T.H :- A. 7 108 R. 65 168. --- --- --- Watford :- A. 16 100 R. 78 160 --- ---… | ||
| Scan265 | Requesting an inspection and strip report for Watford magnetos following a type test. | ||
| View original record | X4001 EP. from EFC. c. Rg. c. Mr. Jacques (A.I.D) EFC5/AD25.3.30. X.4021. WATFORD IS.12 MAGNETOS NOS. 98033/4. The above magnetos were used on the recent F.X. type test and referred to in your various… | ||
| Scan266 | Letter to Messrs. North & Sons, Ltd. correcting an error in a previous communication about Watford magnetos. | ||
| View original record | X4021 EFC8/AD. 25th April, 1930. Messrs. North & Sons,Ltd. Whippendell Rd. Watford. Dear Sirs, May we refer you to our letter of February 15th, ref. EFC3/AD concerning a spanner for the high tension… | ||
| Scan267 | Receipt and urgent testing of Watford magnetos for an engine. | ||
| View original record | X4021. To EFC. 26.3.30. Please receive Watford magnetos type SP.12-2 Nos.98033/4 as requested by note EFC5/AD25.3.30. Will you please arrange to return these to Test Dept. as quickly as possible as… | ||
| Scan268 | Letter from North & Sons, Ltd. confirming the completion of a type test on magnetos for an aircraft engine. | ||
| View original record | X.4021 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… | ||
| Scan269 | Cover letter for an attached report on the condition and performance of Watford IS.12 magnetos following a type test. | ||
| View original record | X4021. Rg. from EFC. c. RV. c. Mr.Jacques A.I.D. EFC1/AD3.4.30. X.4021. WATFORD IS.12. MAGNETOS NOS.98033/4. ON F.X. TYPE TEST. Please find attached copy of my assistant's report ref. WE.13. on the… | ||
| Scan270 | Letter to Messrs. North & Sons Ltd. enclosing a report on the trial of Watford type IS.12 magnetos and asking for comments on the inferiority of one machine. | ||
| View original record | X.4021. EFC2/AD. 3rd April, 1930. Messrs. North & Sons,Ltd. Whippendell Rd. Watford. Dear Sirs, We have pleasure in enclosing for your information a copy of report ref. WE.13. following an inspection… | ||
| Scan271 | Suggestion to change the finish on B.T.H. and Watford aero magnetos to a dull aluminium. | ||
| View original record | X4021. By. from EFC. c. Rg. EFC4/AD3.4.30. X.3832. X.4021. BTH. AND WATFORD AERO MAGNETOS. We suggest dull aluminium finish both for the B.T.H. and Watford aero magnetos. At present the B.T.H.… | ||
| Scan272 | Examination report on two Watford IS12 magnetos after a 100-hour type test on an F39 engine. | ||
| View original record | E.7C. X4021. Date 3 - 4 - 30 Ref. No. W&13. X.NO 4021. Watford IS12 magnetos Nos. 98033/4. These magnetos have now been examined after completion of the 100 hrs type test of F39 engine. The magnetos… | ||
| Scan273 | Test results for two magnetos, identifying a fault in magneto No. 98034. | ||
| View original record | WE13 (2) contd there is anything wrong with the internal parts. There was found to be, previous to the type test, a discrepancy in the electrical performance of one of these magnetos No. 98034 both on… | ||
| Scan274 | Letter from North & Sons, Ltd. regarding the results of type testing on magnetos, one of which showed irregular sparking. | ||
| View original record | X.4021 SPEEDOMETERS THE BRITISH MADE Watford & MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, CROWN AGENTS FOR THE COLONIES, INDIA… | ||
| Scan275 | Correspondence regarding irregular sparking in Watford IS.12 Magneto No. 98034 and arranging for its full examination. | ||
| View original record | X.4021. EP. from EFC. c. Rg. c. Ey. c. Mr.Jacques (A.I.D) EFC1/AD8.4.30. X.4021. WATFORD IS.12. MAGNETO NO.98034. A copy of my assistant's report ref. WE.13. which was sent to you under cover of our… | ||
| Scan276 | Sending a failed high tension rotor and bakelite fan from a Watford IS.12 magneto back to the supplier for replacement parts. | ||
| View original record | X. 4021 Roy. from EFC. c. Despatch Stores. EFC2/AD9.4.30. X.4021. WATFORD IS.12. MAGNETOS. We are sending into the Stores a high tension rotor and bakelite fan from one of the above magnetos No. 83132… | ||
| Scan277 | Return of a Watford Magneto for examination and related subsidiary testing. | ||
| View original record | X.4021 EF MR..CLARKE. C-TO MR PLATFORD. MR. ROWLEDGE> MR. BAILEY. APRIL 9/30 With reference to EFO1/8/4/S/30, I think it an excellent suggestion to send the Watford Magneto 98034 back to Messrs North… | ||
| Scan278 | Letter to Messrs. North & Sons, Ltd. regarding a spanner for Watford magnetos and correcting an error in a previous letter. | ||
| View original record | X4021. COPY. EFCS/AD. 25th April, 1930. Messrs. North & Sons,Ltd. Whippendell Rd. Watford. Dear Sirs, May we refer you to our letter of February 15th. concerning a spanner for the high tension… | ||
| Scan279 | Letter from North & Sons, Ltd. regarding the despatch of a spanner. | ||
| View original record | H.F.W. X4021. SPEEDOMETERS & MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON AEROMAGS WATFORD.… | ||
| Scan280 | The position of the 'F' type test engine No.39 for the return of a magneto. | ||
| View original record | X4021 To EFC. 5.5.30. We think we ought to enquire from EP. at this stage the position of the "F" type test engine No.39 as we are waiting to return one of the Watford magnetos on that engine… | ||
| Scan281 | Return of a Watford I.S.12 Magneto after completion of engine running tests. | ||
| View original record | X4021. EFC. c. RG. c. BY c. Mr. Jaques A.I.D. EP/AGR4/H10.5.30. re. F.XIV.MS.39. With reference to the Watford I.S.12.Magneto, No.98034, which is required for returning to the makers, now that we have… | ||
| Scan282 | The insulation testing of Watford Aero Magnetos and safety gap settings. | ||
| View original record | X4021 WE.23. 14.5.30. X.4021. X.4513W. WATFORD AERO MAGNETOS. It will be remembered that the Watford IS.12 magnetos Nos.98033/4 on the recent "F" engine type test were run with the safety gap set at… | ||
| Scan283 | Ordering error for spanners for Sir Henry Segrave's 'R' engine and a query on the excessive price charged. | ||
| View original record | X4021. Roy/Dm. from EFC; EFCLO/ADL6.5.30. Referring to the attached memo ref. C/WFH/CAT/MML 2.5.30. we only asked Messrs.North for one spanner. In regard to the error of this being sent for the B.T.H.… | ||
| Scan284 | The despatch of two Watford Aero Magnetos, type IS.12. | ||
| View original record | X4021. Roy. from EFC. c. Despatch Stores. EFC4/AD17.5.30. X.4021. WATFORD AERO MAGNETOS. TYPE IS.12. We are sending into the Stores, two Watford IS.12. magnetos Nos. 83132 and 98034. Will you please… | ||
| Scan285 | Letter to Messrs. North & Sons, Ltd. regarding the testing and performance of Watford IS.12 magnetos. | ||
| View original record | X4021. EFC3/AD. 17th May, 1930. X4513W. Messrs. North & Sons,Ltd. Whippendell Rd. Watford. Dear Sirs, Watford IS.12. Magneto No.98034 and Watford IS.12 magnetos generally. You will recall that as a… | ||
| Scan286 | Letter to a supplier regarding testing and safety gap requirements for aero magnetos. | ||
| View original record | Messrs. North & Sons, Ltd. Whippendell Rd. Watford. 17th May, 1930. -2- of the B.T.H. magnetos. In this connection we enclose a copy of a note written to Mr. Jacques of the A.I.D. here pointing out… | ||
| Scan287 | Letter from North & Sons, Ltd. acknowledging a letter and promising a full reply concerning Watford I.S.12 Magnetos. | ||
| View original record | X4021. THE BRITISH MADE Watford SPEEDOMETERS & MAGNETOS. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. CONTRACTORS TO THE ADMIRALTY, WAR… | ||
| Scan288 | Cost comparison and production query regarding Watford and B.T.H. magnetos for 'F' type engines. | ||
| View original record | X4021 E.F.C. Rg. c. Hs. BY15/G. 21.5.30. I would like to know whether it is intended to bring the Watford Magneto into production on any of the 'F' type engine orders we are now considering. Up to the… | ||
| Scan289 | Request to obtain three spring lubricator pads for Watford IS.12 & SP.12-2 magnetos. | ||
| View original record | Y4021. Roy. from EFC/HEW. c. Exptl. Stores. EFC absent EFC/HEW1/AD3.6.30. X.4021. WATFORD IS.12 & SP.12-2 MAGNETOS. Will you please obtain for us from Messrs.North three spring lubricator pads for the… | ||
| Scan290 | Letter to North & Sons, Ltd. regarding Watford IS.12 magnetos, a technical report, and safety gap settings. | ||
| View original record | X4021. EFC2/AD. 19th June, 1930. Messrs. North & Sons, Ltd, Whippendell Rd. Watford. Dear Sirs, Watford IS.12 Magnetos. Confirming the points discussed with your Mr. Kirby during his visit to our… | ||
| Scan291 | Letter from North & Sons, Ltd. regarding a technical report on magnetos and future delivery requirements. | ||
| View original record | HKW X4021 SPEEDOMETERS & MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON AEROMAGS WATFORD.… | ||
| Scan292 | Letter to Messrs. North & Sons, Ltd. requesting the return of magneto No.98034 for an aero engine. | ||
| View original record | X4021. EFC3/AD. 3rd July, 1930. Messrs. North & Sons,Ltd. Whippendell Rd. Watford. Dear Sirs, We duly received yours of the 28th ult. with reference in particular to magneto No.98034. We should now be… | ||
| Scan293 | Letter from North & Sons, Ltd. regarding the improved performance and further testing of Magneto No. 98034 for Rolls-Royce. | ||
| View original record | X4021 SPEEDOMETERS & MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONES: LONDON 1346 GERRARD WORKS: 622 & 623 WATFORD. TELEGRAMS: AEROMAGS WESTCENT LONDON AEROMAGS WATFORD. CONTRACTORS… | ||
| Scan294 | Letter from North & Sons Ltd. regarding the despatch of a 12 cylinder Magneto. | ||
| View original record | X4021 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… | ||
| Scan295 | Letter to Messrs. North & Sons Ltd. regarding the despatch and receipt of a magneto and arranging a call. | ||
| View original record | X4621 EFC6/AD. 18th July, 1930. Messrs. North & Sons,Ltd. Whippendell Rd. Watford. Dear Sirs, We thank you for yours CHK/DD. of the 16th inst. and note that magneto No.98034 is being despatched to us.… | ||
| Scan296 | The performance of a modified Watford IS12 magneto after bench testing. | ||
| View original record | E.7.C. X4021. Date 18-7-30 Ref No. WE32. X Nos. 4021 Watford IS12 magneto No. 98034 ex type test engine No. F14 MS.39. We have now received this magneto back from Messrs North and Sons after… | ||
| Scan297 | Watford IS12 Magneto returned from the makers with improved electrical performance. | ||
| View original record | X4021 To EP. from EFC. c. RHC. c. Mr.Jaques(A.I.D). EFC4/BE23.7.30. X.4021. Watford IS12 Magneto No.98034 ex FXIVMS-39. We have now received this magneto back from the Makers, and we find upon bench… | ||
| Scan298 | Approval and supply of magnetos from the Watford Company for aero engines. | ||
| View original record | X. 4021. To RG. from ROY. c. to WGT. c. to Hs. c. to EFC. --------- ROY4/MG5.9.30 --------- MAGNETOS FOR AERO ENGINES Mr. Kirby, of the Watford Company, advises that they now have formal approval from… | ||
| Scan299 | Air Ministry letter granting airworthiness approval for Watford S.F.12-2 magnetos fitted to F XIV MS engines. | ||
| View original record | COPY AIR MINISTRY London W.C.2 August 1930 887498/28/R.D.E.3.a Type Approval of S.F.12-Magneto on Rolls-Royce F XIV MS ENGINE Gentlemen, I am directed to refer to my letter of the 11th July, granting… | ||
| Scan300 | Return of two Watford SP.12-2 magnetos. | ||
| View original record | X4021. D/BP. from EFC. c. Despatch Stores. EFC4/AD1.9.30. X.4021. WATFORD SP.12-2 MAGNETOS. We are sending into the Stores two magnetos of the above type Nos.83119/20. Will you please arrange for… | ||
| Scan301 | Letter to North & Sons, Ltd. regarding the return of two magnetos for fitting new armatures for an 'H' engine type test. | ||
| View original record | X 4021. c. Roy. c. Mr.Jaques c. Mailing. EFC3/AD. 11th September, 1930. Messrs. North & Sons,Ltd. Whippendell Rd. Watford. Dear Sirs, Watford SP.12-2 Magnetos Nos.83119/20. We are arranging to return… | ||
| Scan302 | Acceptance test log for Watford Aero Magnetos to an abridged specification. | ||
| View original record | X 4021 (Form only 6 copies) WATFORD AERO MAGNETOS. X.4021. ACCEPTANCE TEST TO ABRIDGED SPECIFICATION. | Date. | Magneto No. | (1) Remarks. | (2) Remarks. | (3) Min. sparking speeds. (a) | (3) Min.… | ||
| Scan303 | Performance improvements of two Watford IS12 aero magnetos following the replacement of their armature windings. | ||
| View original record | E7.C Y4021. Ref No WE 56. Date 23-10-30 X.NOS. 4021 Watford IS12 aero magnetos NOS. 83119 and 83120. These magnetos were returned at messrs Norths request for the armature windings to be replaced by… | ||
| Scan304 | Query regarding the differences in screening, leads, and interchangeability between a 'Watford' Magneto and a standard B.I.H. machine. | ||
| View original record | X4021. EFC. RECEIVED Rg/SFP4/ME.24.10.30. Can you tell me if there was any difference in the position of the screening and leads on the 'Watford' Magneto I.S.12, that ran a type test, from the… | ||
| Scan305 | Comparison of the Watford I.S.12 magneto against the standard B.T.H. machine regarding interchangeability. | ||
| View original record | X4021 Rg/SFP. from EFC. EFC1/AD25.10.30. X.4021. WATFORD IS.12 MAGNETO IN PLACE OF B.T.H. MACHINE. Answering your Rg/SFP4/ME24.10.30 there is no difference in the main H.T. wires of the I.S.12 magneto… | ||
| Scan306 | List of Watford Aero Magnetos with their types, serial numbers, and remarks on use or condition. | ||
| View original record | X. 4021 23.10.30. X.4021. X.4513W. WATFORD AERO MAGNETOS. Same as AP.12-2 type Type. No. (R.H.) No. (L.H.) Remarks. I.S.12 (old type) 83134 83135 Obsolete type. I.S.12 I.S.12 " 83136 83137 " " I.S.12… | ||
| Scan307 | List of 'R' aero engine magnetos with their part numbers, remarks, and engine allocation. | ||
| View original record | X.4513B. X.4513W. 23.10.30. R.R. "R" AERO ENGINE MAGNETOS. B.T.H. TYPE SC.12-9. WATFORD SF.12-5 R.H. | L.H. | Remarks. | Engine allotted to. ---|---|---|--- { B.5216 | B.5204 | Loose poles " Magnesium… | ||
| Scan308 | On the performance improvements of Watford magnetos after being fitted with new armatures for an 'H' engine test. | ||
| View original record | X4021. To Rg. from EFC. " By. c. Mr. Jaques. EFCS/AD31.10.30. X.4021. WATFORD SP.12-2 (IS.12) MAGNETOS NOS. 83119/20. At Messrs. North's request this pair of magnetos (which have been earmarked for… | ||
| Scan309 | The upgrading of a pair of Watford Magnetos, type IS.12, to balance their performance for an engine test. | ||
| View original record | X4021. Roy. from EFC. c. Mr.Jaques. c. Despatch Stores. EFC/ADL.11.30. X.4021. WATFORD MAGNETOS TYPE IS.12 (SP.12-2) NOS. 98033/4. The above are the two magnetos that were used for a previous "F"… | ||
| Scan310 | The interchangeability of a Watford I.S. 12 magneto with a B.T.H. machine. | ||
| View original record | X. 4021 SH By Roy He EFC RECEIVED Rg1/ME.5.11.30. WATFORD I.S. 12 MAGNETO IN PLACE OF B.T.H. MACHINE. We have been looking into this question, and 'EFC' reports that except as regards the controls,… | ||
| Scan311 | Letter to Messrs. North & Sons Ltd. regarding a discrepancy in the safety gap of a refurbished Watford IS.12 Magneto. | ||
| View original record | X4021. EFC4/AD. 17th November, 1930. Messrs. North & Sons,Ltd. Whippendell Rd. Watford. Dear Sirs, Watford IS.12 Magnetos Nos.98033/4. We have now received these two machines back from you, one of… | ||
| Scan312 | Letter from North & Sons, Ltd. regarding an error in setting the safety gaps on Watford IS.12 magnetos. | ||
| View original record | X4021. The BRITISH MADE Watford SPEEDOMETERS & MAGNETOS. NORTH & SONS, LTD. WHIPPENDELL ROAD, WATFORD. TELEPHONE/S: LONDON 1346 GERRARD WORKS: 822 & 823 WATFORD. CONTRACTORS TO THE ADMIRALTY, WAR… | ||
| Scan313 | The testing and modification of Watford IS.12 magnetos for the F.39 engine. | ||
| View original record | Y4021. Mr. Jaques A.I.D. from EFC. c. By. c. Rg. c. RHC. EFC1/AD20.11.30. X.4021. WATFORD IS.12. MAGNETOS FOR TYPE TEST ON F.39. We have now received and tested O.K. magnetos Nos. 98033/4 which you… | ||
| Scan314 | Handing over of updated Watford magnetos for fitting to an F.39 engine for type testing. | ||
| View original record | X4021. 3.12.30. X.4021. WATFORD MAGNETOS TYPE SP.12-2 NOS. 98033/4. These magnetos, duly fitted with new armature and thus brought up-to-date, have been handed over for fitting to F [REDACTED] engine… | ||
| Scan315 | The replacement of B.T.H. magnetos with interchangeable Watford magnetos. | ||
| View original record | Rg. c. Hs. c. EFC. X. 4021 BY/Cgh8/G.15.12.30 RECEIVED 15 DEC 1930 X. 4021 WATFORD MAGNETOS IN PLACE OF B.T.H. XHS With reference to Rg1/ME.5.11.30. we are now informed by Messrs. North that they can… | ||
| Scan316 | Cross-reference note for further information on the Watford SP.12-2 magneto. | ||
| View original record | X.4021. 31.12.30. For further matter relating to Watford SP.12-2 (IS.12) magneto see X.6061. | ||
| Scan317 | Letter from the American branch discussing eight-cylinder engine development and the viability of the 40/50 car in the US market. | ||
| View original record | ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. +4024 Oy3-E-12926 December 9th, 1926. Mr. E. W. Hives, Rolls-Royce, Ltd., Derby, England. Re Eight Cylinder Car Dear Hives: You recently asked about the… | ||
| Scan318 | Car design principles concerning engine configuration and dimensions to adapt to modern traffic conditions. | ||
| View original record | Oy3-E*12926 -2- December 9, 1926 If one of these days they should discover that refined smaller cars are available which will afford both comfortable and quick long-distance communication and… | ||
| Scan319 | Engine design, moment of inertia, and a potential V8 engine, with comparisons to a Packard. | ||
| View original record | Oy3-E/12926 -3- December 9, 1926 The engine weight being grouped more nearly over the axle would tend towards a greater moment of inertia of the complete car, and therefore better riding for a given… | ||
| Scan320 | Chassis length and shortening the bonnet on an eight-cylinder car. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. X4024 Hs5/LG29.12.26. RE. EIGHT-CYL. CAR. X435 X7260 With reference to the attached note from OY. We consider that his comments on the length of the chassis… | ||
| Scan321 | Eight-cylinder car and the market trend towards smaller vehicles due to traffic congestion. | ||
| View original record | C O P Y. OY3-E-12926. Hs. from OY. RE. EIGHT CYLINDER CAR. You recently asked about the eight-in-line engine and I gave you such information as we had. Now may I refer you to the December number of… | ||
| Scan322 | Car design principles, comparing engine types and dimensions for future models, particularly contrasting V-eight and straight-eight engines. | ||
| View original record | contd :- -2- It seems to me that since we shall have to compress the car and cannot compress the passengers, we must shorten the engine. As our alternative for U.S. conditions we have the 20 HP. which… | ||
| Scan323 | Challenges and potential designs for a V-eight engine, including comparisons with competitor models like the Packard. | ||
| View original record | contd :- -3- It appears to me that the major difficulty is to get overhead Phantom valve gear in a reasonable width of bonnet. [strikethrough]get[/strikethrough] Overhead tappet adjustment like the… | ||
| Scan324 | Trial results and characteristics of 8-cylinder V-type engines. | ||
| View original record | To R. From Hs/Rm. c. Sd. c. WOT. RS. c. E. BY. X4024 Hs/RmS/ADL 6.10.29. X.4449 X.4048 X.4024 X.3531 X.1729 X.3929 8-CYLINDER VEE ENGINES. We have now tried four cars with 8-cylinder vee engines, La… | ||
| Scan325 | Development of a 12-cylinder car, comparing competitors and deciding to build their own engine. | ||
| View original record | 84024. To R. From Hs. c. to Ss. Hpr: c. to E. Da. c. to By. Hs.1/MJ.4.3.31. 12 CYLINDER CAR. X.3531. X.4024. It will be seen from Mr's. report that except for the gearbox the Maybach car possesses no… | ||
| Scan326 | Investigation into fitment and distribution problems with an eight-cylinder Vee engine, with comparisons to other engines. | ||
| View original record | X4024 R. FROM E. E2/M21.4.31. C. to SG. C. to WGR. C. to HS. VEE ENGINES. _____________ At the time the eight cyl. Vee engine was being investigated it was found that the spread of the cylinders was… | ||
| Scan327 | Comparative table of engine specifications for various makes of cars with 12 and 16 cylinder engines. | ||
| View original record | MAKE. | Bore/stroke No. of cylinders. | Treasury rating HP. | Capacity | Comp. ratio | Engine suspension. | BHP. claimed. | Con. rod big ends | Other particulars. BUGATTI (French) | 2.87 X 4.72, 16 |… | ||
| Scan328 | On future engines, proposing a 12-cylinder model for first-class luxury cars. | ||
| View original record | HS. E. )FROM R. DA. ) C. to SG. WOR. BY. X4024 R2/M8.5.31. FUTURE ENGINES (CAR & AERO) INCLUDING J.3. P.V. & P.3. For first class luxury cars we need more than 6 cyls. which cannot be considered… | ||
| Scan329 | Development of smaller car models and engine sizes. | ||
| View original record | X4024 SG. FROM R. R1/M18.6.31. C. to WOR. BY. C. to HS. E. C. to DA. re. SMALLER MODELS. J. 3. Since we may have something smaller there is little doubt that we should make Japan the complete J. 3.… | ||
| Scan330 | List of British cars with 16 to 18HP rating, detailing their specifications and price. | ||
| View original record | LISTS OF CARS OF 16 to 18HP. RATING (BRITISH) Make. Rated HP. Tax. £ No. of cyls. Bore m/m Stroke m/m C.C. PRICE Chassis Saloon. ALVIS. 16.9 17 6 67.5 100 2145 £500 £695 ARMSTRONG 15 15 6 63.5 101… | ||
| Scan331 | List of foreign cars from 16 to 18 HP rating with specifications and prices. | ||
| View original record | LIST OF CARS OF 16 to 18HP. RATING (FOREIGN) Make. Rated. HP. Tax. No. of cyls. Bore m/m Stroke m/m C.C. PRICE Chassis PRICE Saloon ALFA ROMEO. 15.7 16 6 65 88 1750 £550 £825 CHENARD WALCKER. 18.2 19… | ||
| Scan332 | Various engine configurations (6-cylinder, straight-8, V-8, V-12) and future design directions. | ||
| View original record | SG. FROM R. X4024 R4/M24.6.31. C. to WORA. HS. C. to BY+ E. DA. re. ENGINE QUESTION. I am very doubtful in connection with the 4.5 litres engine whether Sales will be satisfied with the 6 cyl engine.… | ||
| Scan333 | Material choices for engine design, comparing cast iron and aluminum, and the potential use of Austenitic liners. | ||
| View original record | (2) We might however at some future date decide for cost or some other reason that we ought to adopt cast iron, in which case this particular engine design will be quite suitable. We are making… | ||
| Scan334 | Merits of a 6-cylinder engine versus proposed 8 and 12-cylinder engines. | ||
| View original record | H3 84024. To R. From Cg. Copy to Wor. Hs. Sg. Er. Ds. re Engine Question. Referring to R4/M24.6.31 I note you are doubtful in connection with the 4.5 litre engine whether Sales would be satisfied with… | ||
| Scan335 | Developments in 12-cylinder engines, automatic clutches, and vibration damping in US cars. | ||
| View original record | Y4024. x3993 To R. From Hs. c. to SG. Wor. c. to E. Da. c. to Hy. Hs.1/MJ.30.1.32. 12. CYL. ENGINES. It would appear that the twin six engine is rapidly replacing the straight eight on the big cars in… | ||
| Scan336 | Comparison table of specifications for 12-cylinder engines from various car manufacturers. | ||
| View original record | 12 CYLINDER ENGINES. Car. Capacity. Vee° Balance Wts. Damper. Journal Dia. No: of Bearing Packard. 6150 67° Yes Yes 2.750 4 Auburn. 6420 45° Yes Yes 3.000 4 Lincoln. 7350 65° YES Yes 2.500 7 Pierce… | ||
| Scan337 | Torsional vibrations comparing the 6th order vibration on a Phantom II engine with a 60 Vee 6250 cc engine. | ||
| View original record | 84024. x634. R. From Hs/Gry. c. to E. c. to Rs. Hs/Gry.3/MA.24. 2. 32. TORSIONAL VIBRATIONS. ------------------------ E. has asked for a prediction of the relative severity of the 6th. order vibration… | ||
| Scan338 | Severity and amplitude of 6th order vibration in a 12-cylinder engine. | ||
| View original record | X4024. A. From Hs/Gry. c. to Sg. c. to Wsr. c. to E. c. to Rg. c. to Ry. X.634. X.4024. Hs/Gry.1/MA.24.5.32. 12 CYLINDER ENGINE. Replying to R.S/11.5.32 concerning the severity of the 6th order… | ||
| Scan339 | Testing of a 12-cylinder engine for torsional vibration, particularly for use in speed boats for Sir Malcolm Campbell. | ||
| View original record | X4024. HS/RM ) E ) FROM R. DA ) Le-Canadel. R/FD/II.5.32. C. to SG. WOR. BY. RHC. Re I2. Cyl Engine. As we use I2.cyl on speed boat, and also propose same for Sir Malcolm Campbell, and also for other… | ||
| Scan340 | Technical merits and drawbacks of a narrow-angle V8 engine design. | ||
| View original record | To E. from Hs/Gry. NARROW ANGLE V.8 ENGINE. In "Automotive Industries" of Dec. 2nd 1933, P.M. Heldt puts forward a suggestion of a V.8 engine of 20° between cylinder blocks incorporating an unusual… | ||