Rolls-Royce Archives
| Identifier | Entry | ||
| scan0001 | Particulars of tests on front wheel brakes for a 40/50 HP chassis. | ||
| View original record | R.R. 199 (250T) (SD676 19-7-17) MP180865 X9940 To R. from Hs. c. to CJ. c. to Da. c. to E. c. to BY. Hs1/LG20.12.21. FRONT WHEEL BRAKES. Attached herewith are particulars of tests taken on the front… | ||
| scan0002 | Torsion and bending tests performed on a 40/50 front axle. | ||
| View original record | TESTS ON 40/50 FRONT AXLE B. A. C WEIGHT CARRYING TRAY C OF AXLE ROLLS-ROYCE, LIMITED PRINT ROOM. 23 DEC. 21 DERBY LOAD., TORSION TOP (A), TORSION BOTTOM (B), BENDING DEFLECTION (C), BENDING PERMANENT… | ||
| scan0003 | Blueprint detailing off-side leaf spring deflection measurements under varying loads. | ||
| View original record | OFF SIDE F.9707. CLOCK 'A' 2.350 2.875 CLOCK 'B' STAMP: ROLLS-ROYCE, LIMITED PRINT ROOM. 23 DEC. 21 DERBY 2.062 (F) 2.000 (E) 2.000 (D) 2.062 (C) 2.062 (B) 2.156 (A) NOTE:- + - SIGN INDICATES VARIANCE… | ||
| scan0004 | Blueprint detailing load testing results for a near-side leaf spring suspension. | ||
| View original record | NEAR SIDE. ROLLS-ROYCE, LIMITED PRINT ROOM. 23 DEC. 21 DERBY F.9708. CLOCK A CLOCK 'B' NOTE:- + - SIGN INDICATES VARIANCE OF INITIAL FIGURES. DIAGRAM LABELS: 2.125 (A), 2.125 (B), 2.031 (C), 2.000… | ||
| scan0005 | The progress on front wheel brakes, associated frame modifications, and considerations regarding various patents. | ||
| View original record | X9940 To BY. and Hs. from R. c. to CJ. and BJ. RE. FRONT WHEEL BRAKES. 4428. Owing to having been over the ground so many times we have made rapid progress in the last attempt at getting an… | ||
| scan0006 | Completing front wheel brake designs and expediting experimental parts for a new chassis. | ||
| View original record | To CJ. & BJ. from R. c. to Wor. c. to BY. c. to Hs. c. to Wd. X9940 R4/M9.10.22. X.4428- X.4550. I believe we have now completed the designs for the front wheel brakes and I think it will be advisable… | ||
| scan0007 | Mr. Royce's decision to halt work on pneumatic brakes and proceed with air brakes for an experimental car. | ||
| View original record | To BY. from Da. c. to CJ. c. to Wor. c. to Hs. X9940 Dal/M18.10.22. FOUR WHEEL BRAKES X.4428. X.4550. X4561 We understand from Mr. Royce that he does not wish to proceed with the pneumatic brakes. We… | ||
| scan0008 | Modifications to the 40/50 front wheel brakes using a new Goshawk type joint. | ||
| View original record | 49940 To BY. from Da. c.c. to Cj. Wor. Hs. Da2/M27.10.22. 40/50 FRONT WHEEL BRAKES X.4488. We send you herewith N.sch. 1343 shewing the new Goshawk type joint which Mr. Royce wishes used on the 40/50… | ||
| scan0009 | Modification to the 40/50 front wheel brakes, involving a pull-off spring. | ||
| View original record | X9940 To BY. from Da. c. to CJ. c. to Wor. c. to Hs. Da3/M11.11.22. 40/50 FRONT WHEEL BRAKES X.4428. We send herewith N.sch.1345 shewing a modification to N.sch.1317 to provide a pull-off spring on… | ||
| scan0010 | Modification to the 40/50 front wheel brakes and steering lever. | ||
| View original record | R.R. 199 (250T) (SD676 19-7-17) MP18086s x9940 To BY. from Da. c. to CJ. c. to Wor. c. to Hs. Da4/M11.11.22. X.4428 - 40/50 FRONT WHEEL BRAKES. We send herewith N.sch. shewing the top steering lever… | ||
| scan0011 | Explaining that work on the Goshawk's left-hand controls is delayed due to other engineering priorities. | ||
| View original record | X9940 To BJ. from R. c. to CJ. c. to PN. c. to Hs. R3/M16.11.22. GOSHAWK. X.4239. X.4486. (struck through) X.4555 Replying to your BJ10/H14.11.22., we cannot do anything at the moment with the… | ||
| scan0012 | Stressing the urgent need to develop front-wheel brakes for the 40/50HP model due to losing sales to competitors. | ||
| View original record | COPY. 49940 To Wor. from BJ. Copies sent to Wd [crossed out], Roy [crossed out], BY [crossed out], Sft [crossed out], Hs, Mr.Coverley. BJ5/H16/11/22. FRONT WHEEL BRAKES. -------------------- I believe… | ||
| scan0013 | Implementation of front brakes on new and existing cars. | ||
| View original record | To Hs. - from Wor. " " - " " X9940 Wor1/M1/12/22. Front Brakes. ---------- I give you below copy of memo I have received from CJ. Will you please consider this and let me know what your views are on… | ||
| scan0014 | Modifications required to fit front wheel brakes on the 40/50 chassis, comparing pneumatic and mechanical servo systems. | ||
| View original record | X9940 Wor. from Hs. BY. Hs1/LG1.12.22. 40/50 FRONT WHEEL BRAKES. When I was in London yesterday, C.J. and B.J. raised the question of front wheel brakes for existing cars. They asked me to report on… | ||
| scan0015 | Modifications to rear brakes and timelines for pneumatic and mechanical servo brakes. | ||
| View original record | contd:- -2- 11. Modification to present rear brakes. In our opinion it is quite impracticable to think of applying any front wheel brakes to existing cars. As a very approximate estimate, FHC, and… | ||
| scan0016 | Development policy for experimental car models, including the 'Heron', 'Seagull' and '40/50'. | ||
| View original record | To CJ. from R. c. to BJ. c. to Wor. c. to Da. c. to SY. c. to HS. X9940 R3/M17.1.23. RE. EXPERIMENTAL CARS X.3548 X.2565 X.4428 During Mr. Wormald's visit to WW. on the 16th. we discussed the matter… | ||
| scan0017 | Policy statement concerning the fitting of front wheel brakes to the 40/50 chassis. | ||
| View original record | contd:- -2- This policy is necessary and favourable for fitting the front wheel brakes at an early date to the present 40/50 chassis. R. | ||
| scan0018 | Circulating a draft letter to customers explaining the delay in fitting front-wheel brakes due to safety concerns. | ||
| View original record | x9940 To Mr. [illegible] " Hs. " BY. " HP. " Hy. " Sh. " EP. " Yd. " OY. " Kg. I have received the following memo' Ref. BJ17/H21.2.23 from BJ. which he wishes me to circulate. "Below is a copy of a… | ||
| scan0019 | Concluding paragraph regarding the continuation of experiments and the adoption of successful improvements. | ||
| View original record | - 2 - Our experiments will continue, and should they be successful at any future date in providing any desirable improvement without risk of other disadvantages, they will of course be adopted by us.… | ||
| scan0020 | Mr. Royce's concerns about potentially softened brake springs. | ||
| View original record | TO HS. FROM E. C to Bg X9940? RE. BRAKE SPRINGS. E1/M2.6.23. In accordance with Mr. Royce's instructions we send you herewith a copy of a memo. - OY10/W32923 - together with photograph referred to.… | ||
| scan0021 | Letter from Rolls Royce of America to the UK regarding weakened brake springs due to heat and a suggested solution. | ||
| View original record | R.R. 235A 100 T: (S.H. 159. 11-8-20) G. 2800 C O P Y. ROLLS ROYCE OF AMERICA INC. SPRINGFIELD. MASS. OYLO/W32923. March 29th 1923. Mr. Claude Johnson. Rolls Royce Ltd. Derby. England. (Copy for… | ||
| scan0023 | Three types of experimental chassis, EAC.1, EAC.11, and EAC.111, and their respective modifications. | ||
| View original record | R.R. 235a (100 T) (S.H. 159 11-8-20) G. 2800 x9940 TO HS. FROM R. S E C R E T. A. C. R3/M20.9.23. x9770 x9940 c. to CJ. BJ. WOR. c. to BY. FP. PN. c. to EFC. It has now been decided by Mr. Johnson and… | ||
| scan0024 | Secret memo suggesting the acquisition of a Hispano car to compare its front-wheel brakes against their own. | ||
| View original record | X9940 To R. from Hs. c. to CJ. c. to RG. SECRET E.A.C. ETC. HsS/LG27.9.23. FRONT WHEEL BRAKES. X9940 X4214 X1746 X4609 As it would appear, fitting the front wheel brakes as standard on to our cars -… | ||
| scan0025 | Confidential memo requesting two 40/50 HP chassis and bodies to carry out experimental tests on front wheel brakes. | ||
| View original record | X9940 BJ. from Hs. c. to C. c. to Wor. CONFIDENTIAL. Hs4/LC28.9.23. 40/50 CHASSIS. X4428 FRONT WHEEL BRAKES. X3729 X3408 In order to carry out experimental tests with front wheel brakes on existing… | ||
| scan0026 | Timeline for fitting front wheel brakes after the bodies are fitted. | ||
| View original record | contd:- -2- Fitting the bodies before the front wheel brakes are fixed, avoids the cars being seen at the Coachbuilders. We shall definitely be ready to commence fitting the front wheel brakes in 3… | ||
| scan0027 | Secret memo discussing the design and construction of an armoured car body, suggesting sourcing parts from Vickers. | ||
| View original record | BJ. from Hs. S E C R E T x9940 Hs5/LG4.10.23. E. A. C. x 9940 x9840 Referring to your BJ11/H3.10.23. I have consulted Wor. and BY. with reference to Armoured Car Bodies in connection with the above.… | ||
| scan0028 | Query regarding the visibility and potential concealment of front wheel brakes on an armoured car. | ||
| View original record | Contd:- -2- Is it desired when the armoured car body is fitted that we should attempt to cover up or obscure the front wheel brakes fitted? Standard type armoured car wings etc. and wire wheels will… | ||
| scan0029 | Confirming the allocation of two long experimental chassis, Nos. 93-NK and 35-PK. | ||
| View original record | V9940 C8/C4.10.23 HS/Thanks Wrs Re Experimental Chassis. Confirming our conversation on the telephone this afternoon, we have allotted to you two long chassis with sloping columns, Nos. 93-NK and… | ||
| scan0030 | Secret memo on experimental tests for the E.A.C-3 chassis, detailing modifications for 4-wheel brakes and recommending further testing. | ||
| View original record | To BJ. from Hs. c. to WOR. SECRET E. A. C.3 X9940 We have gone fully into the question of the experimental tests on E.A.C-3 chassis. We have assumed that E.A.C-3 cars will be in production by Jan.… | ||
| scan0031 | Minimum number of cars and chassis required for experimental tests, specifically concerning front-wheel brakes and armoured car bodies. | ||
| View original record | contd:- The remaining 2 chassis will be retained at Derby for investigation and experimental tests and for trying out alternative schemes or improvements. We consider six is the minimum number of cars… | ||
| scan0032 | Transfer of responsibility for 10,000-mile chassis tests to the Experimental Department and clarifying testing timelines. | ||
| View original record | BJ. from Hs. c. to Wor. c. to EP. X.9940 Hs1/LGS.10.23. 10,000 MILES PRODUCTION TEST CHASSIS. X9940 X4574 X4601 With reference to BJ1/H4.10.23 in connection with the above. Wor. and I have agreed with… | ||
| scan0033 | The allotment of two long-type chassis for modification into E.A.C-3 chassis. | ||
| View original record | To EP. from Hs. c. to Wor. S E C R E T. X9940 Hs2/LG6.10.23. E.A.C. We have received a note from C. informing us that 2 long-type chassis Nos. 93-NK and 35-PK have been allotted to the Expl: Dept: to… | ||
| scan0034 | Secret memo from B.J. to Hs. regarding the urgent construction and testing of eight experimental E.A.C.3 chassis. | ||
| View original record | To Hs. from BJ. Copy to Wor. [Text is struck through] BJ1/H8.10.23. [Handwritten top centre: V9940] [Handwritten top right: 1] [Handwritten middle right: V9940 / V9941] S E C R E T. E. A. C. 3. With… | ||
| scan0035 | Query regarding the types of steering fitted to 8 chassis allotted for E.A.C. III. | ||
| View original record | To Hs. from RHC. X.9940 RHC16/LS10.10.23. Will you kindly let us know what Types of Steering etc; are [redacted] fitted to the 8 Chassis alloted for E.A.C. III. We require this information before we… | ||
| scan0036 | Secret memo outlining the strict conditions for road testing a chassis fitted with front-wheel brakes. | ||
| View original record | To Hs. from BJ. BJ16/H10.10.23. X9940 S E C R E T. With reference to our conversation yesterday, it is agreed that our present standard chassis may go on the road fitted with front wheel brakes, which… | ||
| scan0037 | Communication regarding the despatch of chassis and requirements for future chassis bodies for testing. | ||
| View original record | W/S. C. from Hs. S E C R E T. E. A. C. Hs2/LG10.10.23. We have despatched chassis 35-PK and 93-NK. to Barkers today by train. We should be pleased to hear from you the Nos. of o ther chassis which are… | ||
| scan0038 | Secret memo about despatching chassis to coachbuilders and arranging for heavy test bodies. | ||
| View original record | X9940 W/S C. from Hs. SECRET. Hs4/LG11.10.23. RE. TEST BODIES. X9840 With reference to your C9/C10.10.23. We have despatched chassis 35-PK and 93 NK. to Messrs. Barkers yesterday by train. Will you… | ||
| scan0039 | Allocating an order number for work on chassis 35-PK and 93-NK for experimental purposes and requesting billing information. | ||
| View original record | X.9940 Mr.Hives (Exp'l Dept.) My/JW1/1A/K11.10.23. Please note that Order Number 50976 has been allocated for work on Chassis 35-PK and 93-NK (taken ex Production for Exp'l purposes). Will you kindly… | ||
| scan0040 | Secret internal memorandum detailing decisions on brake systems and gearbox designs for various chassis. | ||
| View original record | X9940 To BY. from R. Hs. S E C R E T. c. to CJ. BJ. PN. E. A. C. R3/M13.10.23. RE. BRAKES AND GEARBOXES. X. 9320 X. 9360 X. 9940 We have decided that we shall retain double brakes on the back axles on… | ||
| scan0041 | Decision to retain the existing Hand Brake and Back Axle design, alongside a new scheme for the Bell Crank Lever. | ||
| View original record | Mr D'Aeth. Mr Booth. RHC. [Strikethrough] Hs. [Strikethrough] SJT. [Strikethrough] X9940 BY1-F15.10.23. E.A.C.3. Mr Royce has written in response to a note I sent to W.W. suggesting that we should… | ||
| scan0042 | Road tests conducted on front wheel brakes. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. X9940 Expl. No. 9940 REF: hs1/LG20.10.23. S E C R E T. To R. from Hs. c. to CJ. c. to Dn. c. to BY. ROAD TESTS ON FRONT WHEEL BRAKES. We… | ||
| scan0043 | Steering and braking issues, including pivot lean, axle twist, and steering wobbles. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hsl/LG20.10.23. allowing the pivots to lean forward so that when the steering wheels were turned, the weight of the… | ||
| scan0044 | Brake pedal pressure, brake performance with wrapping action, and the adverse effects of front brakes on steering geometry. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. .EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs1/LCS.10.23. We think in the case of emergency, it is difficult to estimate what pressure the driver would put on… | ||
| scan0045 | Road tests conducted on front wheel brakes. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hel/LGC20.10.23. S E C R E T. To R. from Hs. c. to CJ. c. to Da. c. to EY. ROAD TESTS ON FRONT WHEEL BRAKES. We ran… | ||
| scan0046 | Steering and braking performance, focusing on pivot lean, axle twist, and steering wobbles. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hal/LG20.10.23. allowing the pivots to lean forward so that when the steering wheels were turned, the weight of the… | ||
| scan0047 | Brake performance, adjustment, and the effect of front brakes on steering geometry. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hel/1020,10.23. We think in the case of emergency, it is difficult to estimate what pressure the driver would put on… | ||
| scan0048 | Front wheel brakes, detailing axle twist under load and the results of measuring compensator body movement. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. X9940 EXPERIMENTAL REPORT. Expl. No. 9940 REF:Hs/Rn/1/1020.10.23. To R. from Hs/Rn. C. to CJ. C. to Da. C. to HY. C. to Rg. SECRET FRONT WHEEL BRAKES. We… | ||
| scan0049 | Secret memo discussing design experiments and suggestions for front wheel brakes. | ||
| View original record | R. c. CJ. c. Hs. c. By. X9940 E.A.C - SECRET. FRONT WHEEL BRAKES We have received your two wires of to-day's date. We had put in hand a lever pivoted on the axle to bring the rope pull below the… | ||
| scan0050 | Secret internal memorandum detailing the results of road tests on front wheel brakes, noting issues with jaggers and torsional effects. | ||
| View original record | X9940 To R. from Hs. S E C R E T. c.c. to CJ. c.c. to Da. c.c. to BY. c.c. to Rg. ------------------ HsS/LG22.10.23. ------------------ FRONT WHEEL BRAKES. X9940 We have made a further test on the… | ||
| scan0051 | Confirmation of a wire (telegram) providing instructions on a brake mechanism design. | ||
| View original record | X9940 CONFIRMATION OF WIRE. WEST WITTERING. 22.10.23. ROYCAR. DERBY. HIVES - SUGGESTION OF RUNNING BRAKE ROPE FORWARD NOT GOOD. INSTEAD INVERT PULL LEVER ON AXLE USE VERTICAL ROD IN COMPRESSION ALTER… | ||
| scan0052 | Confirmation of a telegram from Royce regarding a brake and spring deflection issue. | ||
| View original record | CONFIRMATION OF TELEGRAM. 4940 WEST WITTERING. 22.10.23. ROYCAR. DERBY. ROWLEDGE AND HIVES - CANNOT SEE HOW BRAKE IS PUT ON BY SPRING DEFLECTION IF ARRANGED AS DRAWING BECAUSE IN ELEVATION BRAKE ROPE… | ||
| scan0053 | Confirmation of a telegram from Royce with suggestions for modifying braking and suspension systems. | ||
| View original record | H.R. 235A (100 'I') (S.H. 159 11-8-20) G. 2800 -X9940- ORIGINAL CONFIRMATION OF TELEGRAM. WEST WITTERING. 22.10.23. ROYCAR. DERBY. X9940 ROWLEDGE AND HIVES - MY SUGGESTION CANCELLING RADIUS ROD NO… | ||
| scan0054 | Front wheel brake 'jaggers' and proposing solutions including brake alterations, stiffer springs, double radius rods, and shock dampers. | ||
| View original record | To Hs. from R. RG. c. to CJ. X9940 R3/M23.10.23. RE. FRONT WHEEL BRAKES. X.9940 X.1559 Referring to your 2 reports, and my 3 telegrams. You will notice that I have corrected 2 mistakes in my… | ||
| scan0055 | Technical memo discussing improvements for brakes, steering, and friction materials. | ||
| View original record | (2) BRAKES TO DEFINITELY WIND OFF. You will notice in my 3rd. telegram that by inverting the levers and using a vertical push rod we ought to get a definite release of the brake pressure with the… | ||
| scan0056 | Instructions for creating two new sets of front springs for a front wheel brake experiment. | ||
| View original record | X9940 Hs. c. R. c. CJ. c. Bv. E.A.C - SECRET Rg2/W23. 10. 23 FRONT WHEEL BRAKES. Confirming conversation with regard to the above, in addition to the lever moving the point of application for the rope… | ||
| scan0057 | Policy on front wheel brakes and addressing reported issues such as axle wind-up. | ||
| View original record | X 9940 To CJ. from R. c. RG. HS. R2/M23.10.23. RE FRONT WHEEL BRAKES+ X.9940. X.1559. Referring to Mr. Hives' first report I do not think we need alter our policy because of this. It is more or less… | ||
| scan0058 | Potential modifications and solutions for issues with front wheel brakes. | ||
| View original record | To RG. HS. } FROM R. c. to CJ. BJ. WOR. c. to Mr. Claremont. X9940 R1/M24.10.23. RE. FRONT WHEEL BRAKES. X. 9940 X. 1559. (1) In reference to Mr. Johnson's memo. I do not anticipate any very serious… | ||
| scan0059 | Damping, the use of aluminium for drums, and the effects of front brakes. | ||
| View original record | Contd:- -2- or because the car is a fast one, and requires a large amount of friction damping. I had suggested strangely enough both the use of double dampers specially arranged so as to damp… | ||
| scan0060 | Telegram concerning a car with front-wheel brakes, radius rods, and a specific scheme. | ||
| View original record | POST OFFICE TELEGRAPHS. (22882) EM5674 20,000M 11/22 R.&Co.Ltd. E1353. X9940 Office Stamp: DERBY 25OCT23 Handed in at: 9/25 M. Office of Origin and Service Instructions: Chichester T Words: 27… | ||
| scan0061 | Tests conducted on front wheel brakes, detailing issues with 'jaggering' and proposed solutions. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. X9940 EXPERIMENTAL REPORT. Expl. No. 9940 REF: HMP/L/3028.10.23. To R. From Hs. c. to CJ. c. to As. c. to Rm. c. to BY. SECRET. FRONT WHEEL BRAKES. We… | ||
| scan0062 | The ineffectiveness of other manufacturers' 4-wheel brake systems compared to their own. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No.1559 REF: Hsl/LG26.10.23 To R. from Hs. c. to CJ. c. to Ds. c. to BY. c. to Rg. SECRET. 4-WHEEL BRAKES. X9940 X1559 From our… | ||
| scan0063 | The dangers of front wheel brakes, front wheel skids, and their effect on steering. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hel./L.994.19.23. might be serious. The fact of the turning circles on the 40/50 being increased from 47 ft. and 50… | ||
| scan0064 | 4-wheel braking systems, focusing on preventing front wheel lock-up and comparing different arrangements. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: H.S./F.4426.10.23. more effective braking under normal conditions with safety if we sacrifice front wheel braking on… | ||
| scan0065 | Road tests and performance issues with front wheel brakes. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. SECRET Y9940 EXPERIMENTAL REPORT. Expl. No. 9940 REF: HES/L G27.10.23. To R. from Hs. c. to CJ. c. to Da. c. to Rg. c. to HY. ROAD TESTS. FRONT WHEEL BRAKES.… | ||
| scan0066 | Braking performance with varied radius rod ball positions. | ||
| View original record | EXPERIMENTAL REPORT. Expl. No. 9940 REF: HES/LG27.10.23. (1) 2" below centre of radius rod ball on axle. (2) 3½" below centre of radius rod ball on axle. (3) 6½" below centre of radius rod ball on… | ||
| scan0067 | Copy of a telegram regarding a modification to a front wheel brake system. | ||
| View original record | X9940 COPY OF TELEGRAM ROWLEDGE AND HIVES ROYCAR DERBY. FRONT WHEEL BRAKES YOUR REPORT INSTRUCTION WE ARE MEETING THE CASE BY MODIFYING THE SYSTEM THE IDEA SEEMS SIMPLE AND RELIABLE NOT SUITABLE FOR… | ||
| scan0068 | Testing a chassis fitted with front wheel brakes. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. X. 9940 EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs2/LG1.11.23. To R. from Hs. c. to CJ. c. to Rg. c. to Da. c. to BY. FRONT WHEEL BRAKES. We have tested an… | ||
| scan0069 | Road testing a front wheel brake scheme, noting its effect on steering and a proposed modification. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. ✓9940 EXPERIMENTAL REPORT. Expl. No. 9940 REF:Hs/Rm1/LG2.11.23. SECRET. FRONT WHEEL BRAKES. Hs. from Rm. Conduit Street We have tried Mr. Royce's scheme on… | ||
| scan0070 | Testing the parallel control for 4-wheel brakes on a front axle. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. X9940 EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs/LGS.11.23. To R. from Hs. c. to CJ. c. to Rg. c. to Da. c. to BY. S E C R E T. 4-WHEEL BRAKES. On the… | ||
| scan0071 | Secret memo detailing instructions from Mr. Royce for modifying the four-wheel brake system for the EAC.111 car. | ||
| View original record | X.9940 To Hs. from DA. S E C R E T. Da//M5.11.23. E. A. C. X.9940 Referring to our conversation on Friday, our instructions from Mr. Royce are that EAC.111. is the car that is going to be made in the… | ||
| scan0072 | Experiments with front wheel brakes, detailing four key points of investigation. | ||
| View original record | B c. H. c. CO. c. Wor. c. Hs. X9940 1 Rg9/W6. 11. 23 BRAKES. We have pushed on with the material for experimenting with front wheel brakes as far as possible, with a view to giving you information… | ||
| scan0073 | Design and advantages of a brake for the E.A.C. front axle. | ||
| View original record | Rg9/W6. 11. 23 - 2 - Contd. I enclose herewith a print of a drawing of a brake applied to the E.A.C. front axle, in which I have endeavoured to make use of the results of those experiments. I think… | ||
| scan0074 | On proposed permanent modifications for front brakes, including new shoe designs and servo mechanisms. | ||
| View original record | X9940 To RG. HS. } FROM R. c. to BJ. CJ. BY. DA. RE. FRONT BRAKES. RL/M6.11.23. X.9940 X.1559. We are proposing permanent modifications to obtain the necessary wind off. We are proposing to send you a… | ||
| scan0075 | Brake testing results, necessary modifications to brake shoes and actuation, and drawings for Goshawk and 40/50 front axles. | ||
| View original record | contd:- -2- or wear of the brakes themselves. Our anxiety at the moment is to get drawings complete and we believe that when the parts are made to these modified designs, it will only be a matter of… | ||
| scan0076 | Modifications and testing of brake systems, including servos and equalised brakes. | ||
| View original record | contd:- -3- bush or replace by a bush having an elongated hole so that one brake shoe does not prevent the other from operating. Test this completely equalised brake to see if it is more consistent in… | ||
| scan0077 | Coachwork modifications for converting the 40/50 and Goshawk models to four-wheel brakes. | ||
| View original record | To LHS. from DA/EV. c. to BY. c. to Hs. X9940 RE. FOUR WHEEL BRAKES. 40/50 AND GOSHAWK. X.9940 X.1559. X5940 DA/EV2/M8.11.23. We are in some doubt as to how the conversion of cars delivered after the… | ||
| scan0078 | Short run and brake modifications for the first 40/50 HP chassis. | ||
| View original record | R.B. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. X9940 Expl. No. 9940 REF: Hel/1010.11.23. To R. from Hs. c. to CJ. c. to RG. c. to DA. c. to SY. E.A.C-3. We have had a short run on the… | ||
| scan0079 | Difficulties of automatically relieving front wheel brakes during cornering and proposing a new scheme. | ||
| View original record | To RG. from R. HS. c. to CJ. BJ. c. to DA. PN. RE. FRONT WHEEL BRAKES. X.1559 X.9940 The matter of relieving these brakes automatically when passing round a corner is a very difficult job and we are… | ||
| scan0080 | Modifications to a 4-wheel servo brake system. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF Hs/LG/12.11.23. To R. from Hs. C. to CJ. C. to RL. C. to Ds. C. to EY. E.A.C-3 - 4-WHEEL BRAKES. In our previous… | ||
| scan0081 | Page discussing brake pressure, effectiveness, and vehicle steering when braking. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H. D. -2- EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs2/L.G.12.11.23. as we had on the original chassis. They appear to come on with less pressure than on the other… | ||
| scan0082 | Confirmation of a telegram regarding instructions for front brake and servo system tests. | ||
| View original record | CONFIRMATION OF TELEGRAM. X9940 WEST WITTERING. 12. 11. 23. HIVES. ROYCAR. DERBY. HAVE INSTRUCTED LONDON TO PURCHASE AS SUGGESTED RE TEST OF FRONT BRAKES PRESS FORWARD SHOES WITH FLOATING FULCRUM… | ||
| scan0083 | Copy of a telegram regarding component flexibility and testing procedures. | ||
| View original record | Copy to Hs. from Rg. K99/40 COPY OF TELEGRAM SENT 14th. NOVEMBER. & RECEIVED 8.45 A.M. 15th. NOVEMBER. ROWLEDGE AND HIVES ROYCAR DERBY. TO ASCERTAIN IF JAGGERS ARE WITHIN THE BRAKE OF FLEXIBILITY OF… | ||
| scan0084 | The testing and modification of a 4-wheel brake system to address issues with jaggers. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs3/LG14.11.23. X9940 To R. from Hs. c. to CJ. RG. c. to Da. BY. 4-WHEEL BRAKES. X.9940 X.4214 We wired you today… | ||
| scan0085 | Confirmation of a telegram from Royce suggesting a solution to 'jaggers' caused by drum flexibility. | ||
| View original record | X99140 CONFIRMATION OF TELEGRAM. WEST WITTERING. 15.11.23. [ROWLEDGE &] HIVES. ROYCAR. DERBY. JAGGERS POSSIBLY CAUSED BY FLEXIBILITY OF DRUM. SUGGEST TESTING WITH DEEPLY RIBBED ALUMINIUM HOOP PRESSED… | ||
| scan0086 | Telegram concerning a brake experiment, suggesting modifications to the brake shoes. | ||
| View original record | Hives Roycean Derby anxiously awaiting result Brake experiment conclusive short shoes will not do suggest sawing through both front and back giving 120 Main and 30 Servo Piece up with flexible steel… | ||
| scan0087 | Investigation into an inconsistent 4-wheel braking system. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. X. 9940 Expl. No. 9940 REF: Hs2/LG15.11.23. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. c. to Rg. c. to Da. c. to BY. 4-WHEEL BRAKES. On the car fitted… | ||
| scan0088 | Communications and analysis on the causes and solutions for 'jaggering' in four-wheel brake systems. | ||
| View original record | To RG. from R. HS. c. to CJ. BJ. c. to PN. Da. RE. FOUR WHEEL BRAKES. X.1559 X.9940 (1) We wired you today as below - "QUITE CONVENIENT FOR YOU TO COME ON TUESDAY. JAGGERING BRAKES MANIFESTLY NOT DUE… | ||
| scan0089 | Technical memorandum discussing braking system issues and potential improvements to axles, shoes, and damping. | ||
| View original record | contd:- -2- if the brake acts smoothly they should deflect and open as observed with a light braking effort, still without jaggering. (8) So then we believe that it is not the spring mounting of the… | ||
| scan0090 | Continued section of a report discussing unsatisfactory schemes of shoes and the need for improvement. | ||
| View original record | contd:- -3- (18) We believe all the present schemes of shoes - including our own - are not entirely satisfactory, and we can get some better, and it would be fatal for us to use the policy of… | ||
| scan0091 | Telegram from Royce regarding the cause of 'jaggering' brakes and suggested solutions. | ||
| View original record | Copy to Hs. from Rg. N9940 TELEGRAM RECEIVED 16th. NOV. 1923. ROWLEDGE AND HIVES ROYCAR DERBY. QUITE CONVENIENT FOR YOU TO COME ON TUESDAY JAGGERING BRAKES MANIFESTLY NOT DUE TO AXLE MOUNTING OR… | ||
| scan0092 | Telegram from Royce detailing the cause and solution for a brake 'jaggering' problem by modifying the Ferodo lining. | ||
| View original record | X9240 CONFIRMATION OF TELEGRAM. WEST WITTERING. 16.11.23. X3409 / X9240 [ROWLEDGE & HIVES. ROYCAR. DERBY.] DEFINITE CAUSE OF JAGGERING IS FERODO EXTENDS ROUND TOO FAR FROM ANCHOR PIN ON ALL OUR… | ||
| scan0093 | Confirmation of a telegram from Royce regarding an issue with jaggering brakes and suggested solutions. | ||
| View original record | K99/40 CONFIRMATION OF TELEGRAM. WEST WITTERING. 16. 11. 23. [ROWLEDGE &] HIVES. ROYCAR. DERBY. QUITE CONVENIENT FOR YOU TO COME ON TUESDAY. JAGGERING BRAKES MANIFESTLY NOT DUE TO AXLE MOUNTING OR… | ||
| scan0094 | Brake testing results, issues with stiff front springs, and the proposal of a torque member to control front axle brake torsion. | ||
| View original record | To CJ. from R. c. to RG. Hs. c. to BJ. DA. X9940 R3/M21.11.23. RE. VISIT OF RG. AND HS. TO WW. ON 20TH. NOV. 1923. X.9940 X.2628 X.1559 X.4214 We spent the whole of yesterday on brakes. With the… | ||
| scan0095 | Modifications to the pressure distributing gear for 40/50 four-wheel brakes to eliminate self-binding. | ||
| View original record | X.9940 To BY. ) HS ) FROM DA. c. to CJ. 40/50 FOUR WHEEL BRAKES. Dal/M22.11.23. We send herewith a sketch N.sch.1704 - shewing how the existing pieces of the pressure distributing gear may be modified… | ||
| scan0096 | Proposed modifications to the four-wheel brake system and suspension for the 40/50 model. | ||
| View original record | To HS. from R. c. to CJ. DA. X9940 R1/M22.11.23. FOUR WHEEL BRAKES - 40/50 ETC. X.1559 X.9940 FRONT SPRINGS. It is a decided advantage to increase the length of the road springs from 42" to 45" and it… | ||
| scan0097 | Negative consequences of fitting 4-wheel brakes to the 40/50 HP model. | ||
| View original record | CJ. from Hs. c. to BJ. X9940 Hs4/LG22.11.23. 4-WHEEL BRAKES. We suggest that even at this stage, we might save the Company time and money if we had the Sales opinion on certain features which we shall… | ||
| scan0098 | Continued memorandum regarding the testing procedure for front wheel brakes for the Sales department. | ||
| View original record | 1804 contd:- -2- features for Sales to try:it is not necessary for the front wheel brakes to be working to test them. Hs. | ||
| scan0099 | Secret memo from CJ to Hs discussing a difficulty with front wheel brakes when shunting. | ||
| View original record | S E C R E T. To Hs. from CJ. Front wheel brakes. I do not want to worry R. unnecessarily. Therefore I am writing to you. R. writes: 'With the exception of slight minor defects we cannot see much… | ||
| scan0100 | Telegram from Royce to Hives regarding solutions for brake faults, including modifications to the balancing gear and sunshaft. | ||
| View original record | POST OFFICE TELEGRAPHS (1156) EM2528 15,000M 21/8/23 R.&Co.Ltd. E1501. Handed in at: S/o Chichester / 1.72 / 30 Received here at: 2/30 M. Office Stamp: DERBY 22NOV23 If the receiver of an Inland… | ||
| scan0101 | Private memo requesting views on an enclosed document concerning front wheel brakes. | ||
| View original record | X9940 To DY. (struck through) from Wor. " Hs. - " " PRIVATE. Wor7/M23/11/23. Front Wheel Brakes. -------- I enclose herewith copy of memo I have this afternoon received from CJ. Can you please give me… | ||
| scan0102 | Querying the timeline for a chassis with front wheel brakes and the impact of recent design changes. | ||
| View original record | COPY. To Wor. from CJ. Front Wheel Brakes. CJ3/E23/11/23. When do you think that you will be able to let us have for PN. to try a chassis having front wheel brakes according to R's latest arrangement?… | ||
| scan0103 | From CJ to Hs regarding an arrangement for steering lock and front springs on a car with 4 wheel brakes. | ||
| View original record | x9940 To Hs. from CJ. Front Wheel Brakes. CJ2/E23/11/23 Thank you for your memorandum Hs4/LG22/11/23 re 4 wheel brakes. I am glad to know from R's memorandum, R1/M22/11/23, that he has arrived at an… | ||
| scan0104 | Comparison of brake load and brake effort for 'Brakes with Floating Fulcrum' and 'Standard Brakes'. | ||
| View original record | X9940 Nov. 1923 BRAKES WITH FLOATING FULCRUM. Backward Brake. Brake Load in lbs. | Brake Effort in lbs. 15 | 28 35 | 88 55 | 139 75 | 161 95 | 226 115 | 308 135 | 360 155 | 448 175 | 508 195 | 513 215… | ||
| scan0105 | Modifications made to floating fulcrum type four-wheel brakes. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. X. 9940 EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs7/LG23.11.23. To R. from Hs. c. to CJ. c. to Rg. c. to Da. c. to BY. FOUR WHEEL BRAKES. With regard to the… | ||
| scan0106 | Proposed modifications to the front and rear wheel braking systems. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H. D. EXPERIMENTAL REPORT. Expl. No. 9940 / 1559 REF: Hs4/LG23.11.23. CJ. from Hs. FRONT WHEEL BRAKES - CJ14/E22.11.23. With the design of the front brakes as it… | ||
| scan0107 | Torque calculations and spring deflection for front wheel brakes. | ||
| View original record | To Hs. from Da. X9940 Da1/M24.11.23. FRONT WHEEL BRAKES. X.9940 X.1559 Thank you for your Hs/Rm2/LG22.11.23. We can see that taken in this way you can get over 40,000 lbs. inches torque on the front… | ||
| scan0108 | Confirmation of a telegram from Royce to Hives regarding alterations to a floating fulcrum cam. | ||
| View original record | X9940 CONFIRMATION OF TELEGRAM. WEST WITTERING. 26.11.23. HIVES. ROYCAR. DERBY. SUGGEST AS QUICKLY AS POSSIBLE ALTER FLOATING FULCRUM CAM FROM POINT EIGHT TO POINT FIVE AND ITS LEVER INCREASED TO SIX… | ||
| scan0109 | Copy of a telegram from Mr. Royce detailing a list of required and non-required parts. | ||
| View original record | C to Hs COPY. 29840 Telegram from Mr.Royce. Received 27th Nov. --------------------------- WORMALD BOYCAR DERBY. NEW PARTS REQUIRED FOR FRONT BRAKES FRONT SPRINGS AND REAR BRACKETS FRONT DUMBIRONS… | ||
| scan0110 | Suggesting a method to check for unnecessary friction in the four-wheel brake mechanism. | ||
| View original record | To HS. from DA. X9940 DAL/M27.11.23. RE. FOUR WHEEL BRAKES. X.1559. X.9940. We think that if you could measure the pull in the vertical rod between the last axle lever and the lever on the brake shoe… | ||
| scan0111 | Proposed experimental alterations to the four-wheel brake system. | ||
| View original record | To HS. from R. c. to CJ. BJ. c. to RG. DA. c. to PN. X9940 RL/M27.11.23. RE. FOUR WHEEL BRAKES. X.1559 X.9940 We are proposing experimentally to try the following alterations - The ratio of the… | ||
| scan0112 | Continued memorandum discussing improvements to brake shoe and servo systems. | ||
| View original record | contd:- -2- suitable leverage to give practical working, because if still unsatisfactory we should have to self 'servo' it forwards. We suggest we twist round the shoe and put a 6" lever on, and by… | ||
| scan0113 | Brake testing methodology and proposed brake shoe designs. | ||
| View original record | To HS. from R. c. to CJ. BJ. c. to RG. DA. c. to PN. X9940 R1/M28.11.23. RE. BRAKES. X.1559 X.9940 In your test of the value of brakes will you always, whenever possible, let us know the distance and… | ||
| scan0114 | Steering load and pivot lean on a four-wheel brake chassis following bump tests. | ||
| View original record | To HS. from DA. 49ruto DA1/M28.11.23. FOUR WHEEL BRAKES. X.1559 X.9940 Referring to your report on bump tests on 4 wheel brake chassis it is evident that the steering is more heavily loaded than in… | ||
| scan0115 | Standardisation of parts for the 40/50 chassis, particularly regarding car EAC.11 and a Dynamo. | ||
| View original record | To R. from BY. c. CJ. c. Wor. c. Hs. Y9940 BY2/P28.11.23. PRESENT 40/50 CHASSIS. X.9770 X.9940 X.---- X.9660 Referring to R5/M21.11.23., the position in regard to the improvements you enumerate in… | ||
| scan0116 | Modifications to dynamo pole shoes and their adaptation for the 40/50 model. | ||
| View original record | contd:- -2- been satisfactory, namely, the one piece cast iron pole shoes. It seems essential that these should be changed over to shoes of the built up type, but whatever modifications are called for… | ||
| scan0117 | Stopping work on front wheel brakes and requesting an up-to-date list of parts likely to be scrapped. | ||
| View original record | X9940 To BY. from Wor. " Hs. " " " Sft. " " " AEM " " PRIVATE. Wor2/M29/11/23. Front Wheel Brakes. I have a note from Mr.Johnson this morning, in which he says Mr.Royce told him on Tuesday that he had… | ||
| scan0118 | Testing front brakes with a floating fulcrum. | ||
| View original record | R.R. 493A (40 H) (EL 42 12-7-23). J.H. D. 9940 Expl. No. 1559 REF:Hs4/LG29.11.23. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. c. to Rg. c. to Da. c. to E. c. to BY. FRONT BRAKES WITH FLOATING… | ||
| scan0119 | Brake performance satisfaction and rectification procedures for the 40/50 chassis. | ||
| View original record | Hs. c. to Hm. Wor. BY. X.9940 EP/Thn12/H30.11.23. RE. 12-EM - 40/50 10,000 MILES PRODUCTION CAR. X.9940 X.4601 With reference your memo. Hs2/LG26.11.23., it would appear to us from the remarks in the… | ||
| scan0120 | Vehicle preferences for a trip to Le Canadel, including a Goshawk and a 40/50 for experimental testing on carburation and brakes. | ||
| View original record | To Hs. from R. c. to CJ. BJ. R2/M1.12.23. RE. LE CANADEL. X.4219 X.9940 For the first part of the time at Le Canadel I should prefer the Goshawk with the Beatonson body - 5-G-11 - but I do not want to… | ||
| scan0121 | Explaining a delay in four-wheel brake designs, awaiting experimental results for the epicyclic pressure distributing gear. | ||
| View original record | To HS. from DA. X9940 DA2/M1.12.23. FOUR WHEEL BRAKES. X.1559 X.9940 Several designs are standing still for information as to the best leverages. For instance the epicyclic pressure distributing gear… | ||
| scan0122 | Telegram confirmation regarding a brake experiment and proposed modifications. | ||
| View original record | X9940 CONFIRMATION OF TELEGRAM. WEST WITTERING. 3. 12. 23. HIVES. ROYCAR. DERBY. ANXIOUSLY AWAITING RESULT BRAKE EXPERIMENT. CONCLUDE SHORT SHOES WILL NOT DO. SUGGEST SAWING THROUGH BOTH FRONT AND… | ||
| scan0123 | New type of sleeve spring clip with dowel pegs for 40/50 four-wheel brake axles. | ||
| View original record | To BY. from Da. c. to CJ. c. to RG. c. to Hs. X. 9940 DA4/M4.12.23. 40/50 - FOUR WHEEL BRAKES. We send herewith N.sch.1710 shewing the type of sleeve spring clip with dowel pegs fitting into holes in… | ||
| scan0124 | Brake tests, comparing the effectiveness of different brake shoe bedding on the 40/50 model. | ||
| View original record | To R. from Hs. c. CJ. E. BY. OY. c. RG. DC. Handwritten: X9940 RE BRAKE TESTS. Handwritten: X37024, X3422, X9940 (struck through) Attached herewith are two prints which show the bedding of an… | ||
| scan0125 | Design suggestion for the front dumb iron and shackle stop in the event of spring breakage. | ||
| View original record | X.9940 To BY. from DA. c. to CJ. c. to RG. c. to HS. DA3/14.12.23. 40/50 - FRONT WHEELS BRAKES X.9940 FRONT DUMB IRON. We send herewith N.sch.1708., shewing a suggestion for providing a stop on the… | ||
| scan0126 | Design of the front spring rear anchorage for the 40/50 model, including details on a protective cover and spring dimensions. | ||
| View original record | X. 9940 To BY. from DA. c. to CJ. c. to RG. c. to Hs. Da/2/M4.12.23. 40/50 - FRONT WHEEL BRAKES. X. 9940 FRONT SPRING REAR ANCHORAGE. We send herewith N.sch.1706 shewing the rear anchorage of the… | ||
| scan0127 | Modifications for the 40/50 model's four-wheel brake system, including changes to springs and steering. | ||
| View original record | X.9940 To BY. from Da. c. to CJ. c. to RG. c. to Hs. 40/50 - FOUR WHEEL BRAKES. X.9940. We send herewith N.sch.1707 shewing the general arrangement of the front of the car with the method of axle… | ||
| scan0128 | Brake effectiveness, specifically regarding floating fulcrum and front wheel brakes. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs2/T5.12.23. Handwritten: X9940 [REDACTED] RR BRAKES. Handwritten: X9940 X4214 On the floating fulcrum brake, even… | ||
| scan0129 | The testing of an epicyclic equalizer, including notes on pedal pressure. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Contd. Expt. No. REF: Hs2/TS.12.23. EPICYCLIC EQUALIZER. We have tried one of these made to the latest instructions. It appears to work… | ||
| scan0130 | Experiment with split shoes and a floating fulcrum for the 40/50 front wheel brake system. | ||
| View original record | To BY. from Da c. to CJ. c. to RG. c. to Hs. X. 9940 DA/4M7.12.23. 40/50 FRONT WHEEL BRAKE SHOES. X.9940 We send herewith N.sch.1713 shewing a further experiment with split shoes. In this case we use… | ||
| scan0131 | Method for operating 4-wheel brakes, as suggested by Mr. Lovesey. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. X9940 Expl. No. 1559 9940 X9910 REF:Hs3/LC7.12.23. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. c. to Da. c. to Rg. 4-WHEEL BRAKES. Herewith description of… | ||
| scan0132 | Suggested method for operating all four-wheel brakes with a servo motor. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. 9940 Expl. No. 1559 REF: Hs3/L07 .12. 23. SUGGESTED METHOD OF OPERATING ALL FOUR WHEEL BRAKES BY SERVO MOTOR WITH THE TOTAL FOOT… | ||
| scan0133 | The performance of a 4-wheel braking system on a 40/50 HP car. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. Y9240 EXPERIMENTAL REPORT. Expl. No. 9940 1559 REF: H24/107.12.23. To R. from Hs. c. to CJ. c. to Rg. c. to Da. BRAKES. We have been running a car fitted… | ||
| scan0134 | Reducing the Ferodo lining on the wrapping shoe for Jaggers. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs4/L.C7. 12.12.23. (FROM PIVOT) Jaggers with 120° Ferodo on the wrapping shoe. We propose to further reduce the… | ||
| scan0135 | Testing floating fulcrum front brakes with jointed shoes, noting increased efficiency but a spongy feel. | ||
| View original record | To R. from Hs. c. to CJ. c. to RG. c. to Da. X.9940 Hsl/LG8.12.23. BRAKES - X.9940 We have tested the floating fulcrum front brakes with the jointed shoes. We find that it undoubtedly increases the… | ||
| scan0136 | Secret internal memorandum detailing the design and modifications for brake systems. | ||
| View original record | COPY. X92/40 To Da. from R. c. to CJ. BJ. RG. c. to HS. PN. R1/M10.12.23. S C E R E T. RE. BRAKES. E.A.C.111. These are to go ahead as originally arranged with only the certain modifications necessary… | ||
| scan0137 | Specifications for brakes, front axle, and springs. | ||
| View original record | contd:- -2- part of the system. The brakes themselves and their shoes will be the same as in EAC.111. except that there will be a stout shaft passing through the crankchamber so that only a short… | ||
| scan0138 | Testing friction loss in front brakes. | ||
| View original record | B.R. 493A (40 H) (SL 42 12-7-23). J.H., D. Y9240 EXPERIMENTAL REPORT. Expl. No. 9940 REF: HEG/LG10.12.23. To R. from Hs. c. to CJ. c. to RG. c. to Ds. c. to BY. BRAKES. The following tests were taken… | ||
| scan0139 | Brake pedal pressure distribution and mechanical efficiency for a system without front brakes. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: He/AB/LC10.12.23. EAC-111 BRAKE PEDAL PRESSURE DISTRIBUTION. (No front brakes only). Front brake equaliser (locked)… | ||
| scan0140 | The mechanical efficiency of a car's braking system. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: UG/AJH/12.12.23. [Diagram of a braking system linkage] FRONT BRAKE EQUALISER (LOCKED) PRESSURE DISTRIBUTOR (SERVO… | ||
| scan0141 | Returning to the original leverage for floating fulcrum brakes with jointed shoes. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs5/T/10.12.23. Handwritten: X9940 To R. from Hs. c. to CJ. c. to RG. c. to Ds. c. to EY. BRAKES. With the jointed… | ||
| scan0142 | Requesting experiments to find variations in braking due to surface conditions and compare wear rates. | ||
| View original record | To Hs. from R. X9940 R2/M11.12.23. FOUR WHEEL BRAKES. X.1559 - Y4388 [Struck through] X. 9940 Will you please make definite experiments to find out the variations in braking due to the condition of… | ||
| scan0143 | Telegram discussing modifications to a car's servo, brakes, and springs. | ||
| View original record | X9940 0048 Office of Origin: Colchester Handed in at: 9.37 M Words: 54 Received here at: 10.54 M Hives Roycar Derby Try servo Ferodo shortened so that servo is less fierce We assume you are refitting… | ||
| scan0144 | Proposed modifications to the 40/50 front axle to increase steering lock with four-wheel brakes. | ||
| View original record | To BY. from DA. c. to CJ. c. to RG. c. to HS. X9940 DA1/M12.12.23. X.9940 X.9420 40/50 FOUR WHEEL BRAKES - FRONT AXLE. We send herewith scheme 1716 shewing our proposals for gaining increased lock in… | ||
| scan0145 | Inherent disadvantages of fitting a new 4-wheel brake design to existing 40/50 HP cars. | ||
| View original record | PN x9940 Hs3/LG12.12.23. 4-WHEEL BRAKES ON EXISTING 40/50 CARS. The inherent disadvantages in the latest design of 4-wheel brakes which it is intended to fit to existing 40/50 HP. cars are as follows… | ||
| scan0146 | Brake operation, spring stiffness, and steering control for the 40/50 HP model. | ||
| View original record | contd:- -2- The Hispano brake operation is delightful. The brakes are operated with very light pressure and because of this it is possible to judge the braking effort very nicely. One can arrive at… | ||
| scan0147 | Adopting Perrot type self-wrapping brake shoes due to limitations with a current scheme. | ||
| View original record | contd:- -3- Hs3/LG12.12.23. operation as on the Hispano. Because of the limitations with our scheme we are proposing to adopt the Perrot type self-warpping shoes. We have had no experience with these… | ||
| scan0148 | The inherent disadvantages of fitting 4-wheel brakes to existing 40/50 cars. | ||
| View original record | RH Y9440 Spare Hs3/LG12.12.23. 4-WHEEL BRAKES ON EXISTING 40/50 CARS. The inherent disadvantages in the latest design of 4-wheel brakes which it is intended to fit to existing 40/50 HP. cars are as… | ||
| scan0149 | The Hispano brake system and the proposed brake and suspension arrangements for the 40/50 HP model. | ||
| View original record | contd:- -2- The Hispano brake operation is delightful. The brakes are operated with very light pressure and because of this it is possible to judge the braking effort very nicely. One can arrive at… | ||
| scan0150 | Proposal to adopt Perrot type self-wrapping brake shoes. | ||
| View original record | contd:- -3- Hs3/LGl2.12.23. operation as on the Hispano. Because of the limitations with our scheme we are proposing to adopt the Perrot type self-warpping shoes. We have had no experience with these… | ||
| scan0151 | Query regarding friction losses in a four-wheel brake system's 'servo' connecting lever. | ||
| View original record | X. 9940 To HS. from DA. Da2/M13.12.23. FOUR WHEEL BRAKES. X. 9940. Referring to your Hs5/LG10.12.23., re. loss in the brake transmission, would you tell us whether the 'servo' connecting lever on the… | ||
| scan0152 | Delays in developing and testing two new types of brakes for the 40/50 model. | ||
| View original record | Y9940 To WOR. from Hs. HS2/T15.12.23. With reference to the attached, in the first paragraph the promise is too optimistic. The position at present is that we have yet to receive drawings from BY. for… | ||
| scan0153 | The importance of properly testing new parts, contrasting the situation with brakes against engines. | ||
| View original record | Contd. -2- Hs2/T15.12.23. to rush front wheel brakes. We should profit by this, and not think of supplying new parts to customers until they have been properly tested. In the case of the brakes we… | ||
| scan0154 | Car PN testing, E.A.C. model engine and brake arrangements, and associated limitations. | ||
| View original record | X9940 To WOR. from Hs. Hsl/T15.12.23. With reference to the attached (CJ1/E4.12.23):- (1) We assume that any car PN. would take away to test should be of a type which will be delivered to customers,… | ||
| scan0155 | Delays and revised timelines for brake development and testing. | ||
| View original record | To WOR. from Hs. 49940 Hs2/T15.12.23. With reference to the attached, in the first paragraph the promise is too optimistic. The position at present is that we have yet to receive drawings from BY. for… | ||
| scan0156 | Note on the importance of properly testing new parts for front wheel brakes before supplying them to customers. | ||
| View original record | Contd. -2- Hs2/T15.12.23. to rush front wheel brakes. We should profit by this, and not think of supplying new parts to customers until they have been properly tested. Hs. | ||
| scan0157 | Car testing, gearbox designs, and the unsatisfactory state of the E.A.C.3 brake system. | ||
| View original record | Y9940 To WOR. from HS. Hs1/T15.12.23. With reference to the attached (CJ1/E4.12.23):- (1) We assume that any car PN. would take away away to test should be of a type which will be delivered to… | ||
| scan0158 | Suggesting experiments to resolve snatching and chunking in the 40/50 front wheel brake servo system. | ||
| View original record | X. 9940 To HS. from DA. DA3/M15.12.23. 40/50 FRONT WHEEL BRAKES - SERVO. X. 9940 We think that the pull off spring on the servo operating mechanism is quite possibly in the wrong place. Could you try… | ||
| scan0159 | Final arrangement and technical specifications of a four-wheel brake servo system. | ||
| View original record | X. 9940 To HS. from R. c. to CJ. BJ. RG. DA. c. to Wor. BY. PN. S E C R E T. R5/M17.12.23. EAC.11 and IMPROVED EAC.1. FOUR WHEEL BRAKES. X.9940. The final arrangement of these has been explained in an… | ||
| scan0160 | Brake shoe arrangements and the implementation of four-wheel brakes. | ||
| View original record | contd:- -2- shoe as a means of safely using a long shoe on the brake drums, and a means of obtaining effective braking with a given lever-age. Our own particular type of arrangement so as to use a… | ||
| scan0161 | Instruction to millwrights to build a rig for testing brakes. | ||
| View original record | Wor. from Hs. Y9940 BRAKE TESTS. Hs4/LG20.12.23. The Millwrights have been instructed to make us a rig for testing brakes. We are very anxious to obtain this as soon as possible. We anticipate that it… | ||
| scan0162 | Performance and limitations of 4-wheel brakes, comparing them to customer expectations and competitor standards. | ||
| View original record | To CJ. from Hs. c. to BJ. c. to Wor. c. to Rg. c. to PH. x9940 Hs1/LG20.12.23. x9770 x9940 BRAKES - AND EAG-1 ENGINE. During our recent visit to WW. it was evident that R. was more satisfied with the… | ||
| scan0163 | Testing of Hispano 4-wheel brakes and the development status of the EAC-1 engine. | ||
| View original record | contd: -2- 4-wheelbrakes similar to those more-or-less approved by R. We consider they ought to try them - they should also try the Hispano brakes. At the present time some of the brake units off the… | ||
| scan0164 | Four separate experiments to improve the 40/50 four-wheel brake system. | ||
| View original record | X.9940 To BY. from Da. c. to CJ. RG. HS. 40/50 - FOUR WHEEL BRAKES. X.9940 We send herewith N.sch.1720. This shews four separate experiments on the front wheel brakes which we should like to try… | ||
| scan0165 | Testing of new brakes against a Hispano-Suiza car and planning a road test in France. | ||
| View original record | To Hs. from CJ. BRAKES. X9940 CJ6/E28.12.23. X.4214 X.9940 X.9680. Referring to your secret memo. Hs1/LG20.12.23., please let me know when you have the Hispano running again with its brakes and we… | ||
| scan0166 | Secret memo discussing the design and development of a new brake system, including the front axle, servo, and shoes. | ||
| View original record | X, 9940 To RG. E. & DA. FROM R. copy to - CJ. BJ. Wor. HS. BY. EP. Mr. Claremont. S E C R E T. R5/M.1.24. E.A.C.1 & 2. BRAKES. X, 9940 SYSTEM. The system we have adopted for the above more closely… | ||
| scan0167 | Secret memorandum discussing the design and performance of a brake system, including the servo, springs, and shoes. | ||
| View original record | X.9940 SECRET R2/M1.1.24. To RG. E. & DA from R. c. to CJ. BJ. Wor. HS. BY. EP. E.A.C.111. RE. BRAKES. X.9940. SYSTEM. I feel sure that we must persevere with the scheme we have in hand. I was very… | ||
| scan0168 | Bumping tests on a 40/50 chassis with EAC-111. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. N9940 EXPERIMENTAL REPORT. COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. X.1331 Expl. No.X. 9940 REF. Hs2/LG2.1.24. OBJECT OF TEST. Bumping tests on 40/50… | ||
| scan0169 | Log sheet detailing the results of a bump test on a new front axle and brake system. | ||
| View original record | SHEET 1. BUMP TEST ON NEW SCHEME OF FRONT AXLE AND BRAKES, ETC. Conditions of test :- Drum makes 105 r.p.m. Lift of Cam 2". Tyres at 65 lbs/sq.in. Load 600 lbs. plus top half of Crankcase and full… | ||
| scan0170 | Log of breakages related to springs and steering components for a Standard 40/50 model. | ||
| View original record | SHEET 2. SPRINGS ANCHORED AT REAR AND SHACKLED AT FRONT. Standard 40/50 Steering Box - Pendulum and Side Steering Tube - No Radius Rods. Total running time. hrs. mins. Piece No. Running time. hrs.… | ||
| scan0171 | Log sheet detailing breakages and running times for Woodhead Springs and Houdaille Shock Absorbers. | ||
| View original record | SHEET 3. WOODHEAD SPRINGS - HOUDAILLE SHOCK ABSORBERS. | Total running time. hrs. mins. | Piece No. | Running time. hrs. mins. | BREAKAGES. Description and Remarks. | |---|---|---|---|---| | 73 | 55 |… | ||
| scan0172 | Analysis of spring failures during testing, detailing average life and fracture positions. | ||
| View original record | SHEET 4. ANALYSIS OF SPRING FAILURES DURING TEST. Total number of failures { Off side - 5, Near side - 11 Average life of springs. PARTICULARS., OFF SIDE., NEAR SIDE., BOTH SIDES. , No. of Springs.,… | ||
| scan0173 | Scheme for taking up clearance in rear brakes by rotating the servo with foot pressure. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. DA. from HS/ACL. Expl. No. 9940 REF: Hs/ACL1/LG3.1.24. RE. SCHEME FOR TAKING UP CLEARANCE IN REAR BRAKES BY MEANS OF ROTATING THE SERVO… | ||
| scan0174 | Alternative scheme for a servo-assisted braking system. | ||
| View original record | R.E. 493A (40 H) (SL 42 12-7-23). J.H. D. -2- Expl. No. 9940 REF: Hs/ACL1/LG3.1.24. EXPERIMENTAL REPORT. necessary to use higher pedal pressures to obtain same braking effort. (2) The angularity of… | ||
| scan0175 | Secret memo discussing failures and potential improvements for steering gear, front springs, and frame brackets. | ||
| View original record | X9940 To Hs. from Da. c. c. to BY. c. c. to S E C R E T. E. A. C. DA4/M4.1.24. X.9770 X.9940. Referring to your HS2/LG2.1.24. and the reported failures of the steering gear with radius rods, you will… | ||
| scan0176 | Listing cars in the Experimental Department as of October 31st 1923, including test vehicles for 4-wheel brakes. | ||
| View original record | To My/G. from Hs. Handwritten: Y9440 Handwritten: X180 (crossed out) / Y9440 Hs2/LC7.1.24. With reference to the list of cars attd. These were all in the Expl: Dept: on Oct. 31st. 1923. In addition to… | ||
| scan0177 | Modifications to reduce heat under the scuttle and potential alterations to the undershield for cars with front brakes. | ||
| View original record | CJ. from Hs. [Handwritten] X9940 Hs3/LG7.1.24. & [Handwritten] XP19 [Handwritten, crossed out] X9940 With reference to your CJ16/E4.1.24. So far no standardisation sheet has been issued for the… | ||
| scan0178 | Technical drawing and calculation sheet detailing EAC-1 steering geometry. | ||
| View original record | X9940 DETAILS OF EAC-1 STEERING. V3441 X9740 X4578 Effective tyre dia. to give true centre point steering = 35.7". Actual effective tyre dia. in practice taken as 33". Deviation in centre point due to… | ||
| scan0179 | Meeting notes discussing steering lock and front spring modifications for the EAC.3 chassis. | ||
| View original record | X9940 To CJ. & R. c. to RG. E. DA. c. to Wor (from Rg.) c. to BY { " " } c. to Hs. { " " } E1/M10.1.24. VISIT OF RG. AND HS. TO WW. TUESDAY 8.1.24. X.9940 X.4247 X.4260 X.9770 The following notes were… | ||
| scan0180 | Meeting minutes discussing 4-wheel brakes, 20 HP frame length, a side lever gearbox, and patent questions. | ||
| View original record | contd:- -2- test should be fitted with the new speedometer drive and the best 4 wheel brakes we know of at the time, but it should not wait for any further alterations. It was further suggested that… | ||
| scan0181 | Modifying car brakes to achieve more equal pressure between the front and rear. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. X9940 Expl. No. 1559 9940 9910 REF:Hs4/LG11.1.24. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. RG. c. to DA. BY. c. to E. BRAKES. As the efficiency of the… | ||
| scan0182 | Brake judder, known as 'jaggers', and reducing servo power. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. -2- Expl. No. 9940 REF: HS4/LG11.1.24. EXPERIMENTAL REPORT. This week we have received from DA. a scheme for reducing the power of the servo by increasing… | ||
| scan0183 | Modifications to prevent brake pedal jagging and its effect on steering. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. -3- EXPERIMENTAL REPORT. Expl. No. 9940 REF HS4/LG11 1. 24. brake pedal to prevent the sudden application. The following experiments have been tried and the… | ||
| scan0184 | Front brake effectiveness, associated steering faults, and comparative brake tests on a rig versus on the road. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. -4- EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs4/LG11.1.24. the front brake is most effective, the car steers in that direction. On the cars we are running… | ||
| scan0185 | Issues with steering pivot pins, brake dust covers, and future testing plans. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. -D- EXPERIMENTAL REPORT. Expl. No. 9940 REF HS4/LG11.1.24. This is a point which we are investigating. CONSTRUCTION. We find difficulty in preventing the… | ||
| scan0186 | Schematic diagram showing the arrangement of a Hispano four-wheel brake system. | ||
| View original record | ARRANGEMENT OF HISPANO FOUR WHEEL BRAKES. REAR BRAKE. 2.67 2.73 3.525 DISTRIBUTING SHAFT. NO COMPENSATING GEAR BETWEEN FRONT & REAR BRAKES. COMPENSATING GEAR BETWEEN NEAR & OFF SIDE FRONT BRAKES.… | ||
| scan0187 | Diagram of a 40-50 four-wheel brake system's standard and modified arrangements. | ||
| View original record | 40-50 FOUR WHEEL BRAKES. STANDARD ARRANGEMENT. (SHEET. i). .4 CAM RAD. 4.5 2.8 3.3 3.25 1.5 P 14.75 6.187 3.15 2.75 DIFFERENTIAL DISTRIBUTER { 5/7 TORQUE TO FRONT { 2/7 " TO SERVO. A B C D 2.225.… | ||
| scan0188 | Calculations and diagrams for rear brake pressure on STD 40-50 and Goshawk models. | ||
| View original record | PRESS. ON REAR BRAKES OF STD 40-50 R.R. P 14.75 6.18 1.4 1.9 2.0 2.5 7" .5 CAM RAD. EFFECTIVE PRESS. AT SHOES = (P 14.75 x 1.4 x 2 x 7 x 1 x .2) / (6.187 x 1.9 x 2.5 x 1 x .2 x .09) = 10.95 P PRESS.… | ||
| scan0189 | Requesting a meeting to discuss important jobs, including Front Wheel Brakes, and questions raised by CJ. | ||
| View original record | To RG. From Worr " BY. " " " Hs. - " " [Handwritten]: X99nto Wor2/M11/1/24. I have some rather important memoranda from CJ. re Front Wheel Brakes and all the other jobs that are bothering us at the… | ||
| scan0190 | Steering issues caused by imbalanced four-wheel braking and potential remedies. | ||
| View original record | To HS. from DA. Y9940 [handwritten] DA2/M14.1.24. FOUR WHEEL BRAKES. X.9940 Referring to the question of the steering being affected by one brake being on harder than the other, it appears that this… | ||
| scan0191 | Potential improvements to the four-wheel brake system compensation on the 40/50 model. | ||
| View original record | X.9940 To BY. from DA. c. to CJ. c. to Hs. DaY/M14.1.24. 40/50 - FOUR WHEEL BRAKES. X.9940. It appears to be desirable to improve the compensation on the front brakes as much as possible. We think… | ||
| scan0192 | Secret internal memo regarding car trial arrangements and a brake comparison with a Hispano car. | ||
| View original record | W/S. PN. from Hs. S E C R E T. X9940 X4214 Hs2/LG15.1.24. With reference to your note of the 14th. inst. According to our programme, we shall have your car ready for running on the road on Monday. It… | ||
| scan0193 | Letter from R. to E. requesting weekly progress reports on various projects. | ||
| View original record | To E. from R. c. to RG. c. to DA. c. to HS. RE. PROGRESS. X.9940. X.3528. Many thanks for your kind letter. I was wondering what had become of RR. at WW. I have received some word from Mr. Rowledge… | ||
| scan0194 | Secret memorandum detailing progress and nomenclature for various EAC development schemes. | ||
| View original record | 49940 To R. from E. c. to CJ. RG. HS. SECRET E1/M16.1.24. E. A. C. X.9940 X.3528 X.9770. X.4247. RE. PROGRESS AT WW. We are sorry to have appeared neglectful of sending proposals of what shall be done… | ||
| scan0195 | Status report on various experimental car (EAC) models, including gearbox and chassis updates. | ||
| View original record | contd:- -2- EAC.5. Our revised EAC.1. e.g. As EAC.4. but with open propeller shaft and 20 HP. type rear axle control. We are sending a copy of a more detailed list got out at Derby. EAC.1. has been… | ||
| scan0196 | Intensive road test of 4-wheel brakes on a 40/50 car. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H.,D. X9940 EXPERIMENTAL REPORT. Expl. No. 9940 1559 REF:Hs4/LG17.1.24. To R. from Hs. (Le Canadel) c. to CJ. RG. c. to DA. E. c. to BY. S E C R E T. BRAKES+ We are… | ||
| scan0197 | Issues with front brakes, including oil contamination causing steering pull and a proposed fix for a chunky operating mechanism. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23) J.H., D. -2- EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs4/LG1 7.1.24. running it was noticed that the N.S. front brake was much more affective and the steering ran off… | ||
| scan0198 | Brake servo issue causing noise and a proposed solution. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. -3- EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs4/LG17.1.24. it has been complained of by everyone who has tried these brakes. There is also a chunk when the… | ||
| scan0199 | Brake system pressure distribution and servo operation. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. -4- EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs4/LG17.1.24 The pressure on each front shoe with standard arrgt. is approx. 11 X pedal pressure. We should… | ||
| scan0200 | The effects of front braking on steering for a 40/50 chassis. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. -5- Expl. No. 9940 REF: Hs4/LG17.1.24. EXPERIMENTAL REPORT. Front braking the steering is affected in the same manner as on our 40/50 chassis. Da. has… | ||
| scan0201 | Unequal braking affecting steering. | ||
| View original record | R.E. 493A (40 H) (SL 42 12-7-23). J.H., D. X9940 EXPERIMENTAL REPORT. Expl. No. 9940 1559 REF: Hs3/LG22.1.24. To R. from Hs. (Le Candel) c. to CJ. DA. c. to E. BY. c. to Wor. S E C R E T. BRAKES.… | ||
| scan0202 | Brake servo adjustments, pedal pressure calculations, and the effects of unequal braking on steering. | ||
| View original record | X9940 To R. from DA. c. to RS. Dal/M19.1.24. BRAKES. X.9940. X.9770. Referring to Hs4/LG17.1.24. We should like to say that we went into the question of pulling up the rear brakes by the pedal through… | ||
| scan0203 | Requesting instructions for the pull off springs on front brakes. | ||
| View original record | To Da. from Hs. PULL OFF SPRINGS TO FRONT BRAKES. I cannot trace that we have received at Derby your instructions as regards what the pull off springs on the front brakes should be. Temporarily we are… | ||
| scan0204 | Confidential internal memorandum discussing the phenomenon of 'jaggers' in front wheel brakes and proposing solutions. | ||
| View original record | 49740 To HS. RG. } E. DA. } FROM R. SECRET AND CONFIDENTIAL. RL/M21.1.24. c. to CJ. BJ. BY. WOR. EP. PN. RE. FRONT WHEEL BRAKES. X.9940 X.9420 X.9430 I was very pleased indeed to receive HS. report on… | ||
| scan0205 | Technical memorandum discussing brake performance, shoe design, servo adjustments, and steering. | ||
| View original record | contd:- -2- they will be found consistent but we await further tests. No-one would desire to change from the standard more or less rigid shoes and fixed fulcrum brakes unless some definite advantage… | ||
| scan0206 | Effects of unequal braking on steering geometry and potential design solutions. | ||
| View original record | contd:- -2- Given centre point steering one can only see that the unequal braking affects the steering because of the inclination of the pivots in front elevation. The torque causing pressure on the… | ||
| scan0207 | Effects of unequal brakes on steering and potential solutions for consistent braking. | ||
| View original record | X.9940 To HS. RG. ) E. DA. ) FROM R. SECRET. R1/M23.1.24. c. to CJ. BJ. Wor. BY. EP. PN. FRONT WHEEL BRAKES. X.9940. RE. STEERING. Regarding the effects of unequal brakes on steering it is evident… | ||
| scan0208 | Brake performance, consistency issues, and potential improvements to the system. | ||
| View original record | contd:- -2- There is also the simple cause for steering towards the heavy brakes by the uneven braking causing the tyres to roll sideways on the road like a boat with an oar stuck in the water at one… | ||
| scan0209 | Advocating for fitting Goshawks with 4-wheel brakes over other upgrades. | ||
| View original record | contd:- -3- You will remember that I am for fitting Goshawks with 4-wheels brakes as soon as we can do so effectively and reliably. To my views it is more important than the 4 speeds or side levers,… | ||
| scan0210 | Specifications and alternatives for pull off springs for front brakes. | ||
| View original record | X.9940 To Hs. from Da. S E C R E T. Da8/M23.1.24. E. A. C. PULL OFF SPRINGS TO FRONT BRAKES. X.9940 Replying to your Hs3/LG21.1.24, we have not given any instructions about these pull off springs… | ||
| scan0211 | Brakes road test, detailing issues with servo liner wear and material comparisons. | ||
| View original record | R.R. 403A (40 H) (BL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs4/LG25.1.24. S E C R E T. BRAKES - ROAD TEST. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. We have now… | ||
| scan0212 | Brake performance and wear, comparing two-wheel and four-wheel systems under various road conditions. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H. D. EXPERIMENTAL REPORT. Expl. No. 9940 REF.Hs4/LG25.1.24. over the same road as the RR. - by the same drivers - under the same conditions, to see how long the… | ||
| scan0213 | Using cast iron to achieve a consistent servo brake for equal braking. | ||
| View original record | contd:- -3- anything else. If the cast iron will give us a consistent servo brake, then we shall have made considerable progress as regards equal braking. Hs. | ||
| scan0214 | Various braking system issues including servo wear, rear chunking, and potential solutions involving dash-pots and different materials. | ||
| View original record | X9940 To HS. RG. } FROM R. E. DA. } S E C R E T. E. A. C. RE. FRONT BRAKES. X.9940 Naturally we must expect trouble to be found in long distance testing, but the work of getting the above right seems… | ||
| scan0215 | Letter detailing views on slow-speed servo brakes and observations on competitor's brake mechanisms. | ||
| View original record | To CJ. from R. c. to RG. E. DA. Hs. PN. BJ. BY. Wor. Y9940 La Villa Mimosa, Le Canadel, Var., France. X.1559. X.9770 X.9940. Jan. 27th. 1924. I am writing this to you to save postal time, and that you… | ||
| scan0216 | Letter discussing improvements to the braking servo system, including speed of application and equalizing braking force. | ||
| View original record | X9940 From R. from CJ. c. to Hs. RG. E. DA. BJ. PN. Wor. BY. EP. La Villa Mimosa, Le Canadel, Par le Lavandou, Var, France. X.9940 X.9410 27.1.24. Dear CJ., Although there is some hope in the metal… | ||
| scan0217 | Letter from F.H. Royce discussing suspension stiffness, rubber buffers, and the heating of the 'servo' and countershaft brakes. | ||
| View original record | contd :- -2- than other people) than the suggestions I have already made of a 25% increase in stiffness and an increase in the thickness of the rubber buffers. In future 40/50 we are lengthening the… | ||
| scan0218 | From 'R' discussing technical solutions for brake issues referred to as 'jaggers and chunking'. | ||
| View original record | X. 9940 To RG. E. & DA. FROM R. S E C R E T. R1/M28.1.24. c.c. to CJ. BJ. Wor. HS. BY. EP. FRONT WHEEL BRAKES. X. 9940 Perhaps I am repeating much of what has already been said by others or myself,… | ||
| scan0219 | Secret internal memo discussing the development and priority of chassis models EAC.1 to EAC.5. | ||
| View original record | To BY. RG. } FROM R. E. DA. } c. to CJ. BJ. WOR. HS. X9940 R4/M28.1.24. S E C R E T. RE. EACs. 1. to 5. SYMBOLS AND DESCRIPTION. X.9770 X.9940 The above as given in BY's list of 14.1.24 seems O.K. re.… | ||
| scan0220 | Investigating the cause of 'brake jaggers' and potential cures. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. √9940 Expl. No. 9940 REF: Hs3/LG28.1.24. 1559 EXPERIMENTAL REPORT. To R. from HS. c. to CJ. RG. c. to DA. E. c. to BY. WOR. S E C R E T. BRAKE JAGGERS. After… | ||
| scan0221 | The suggested cause for the chattering of front brakes. | ||
| View original record | R.R. 405A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF Hs/ACL/LG25.1.24. SUGGESTED CUASE FOR CHATTERING OF FRONT BRAKES. [Diagram showing forces on a brake drum] DIRECTION… | ||
| scan0222 | The mechanics of friction, energy, and slip in a spring and drum system. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF:Hs/ACL/LG25.1.24 of the spring becomes greater than the frictional force between the drum and the shoes. Slip will… | ||
| scan0223 | Telegram suggesting a test by removing non-wrapping shoes from the rear brake. | ||
| View original record | TO: HIVES ROYCAR DERBY. SUGGEST REMOVING NON WRAPPING SHOES FROM REAR BRAKE FOR PURPOSE OF TEST THIS SHOULD DOUBLE APPARENT COEFFICIENT OF FRICTION AND RESULT, IS AGAIN HALVING THE WORK OF SERVO… | ||
| scan0224 | Secret memo discussing the decision to implement a slow speed servo for the 4-wheel brake system and outlining a conversion plan. | ||
| View original record | X9940 To Hs. Rg. ) FROM R. E. DA. ) S E C R E T. R1/M29.1.24. c. to CJ. BJ. WOR. BY. RE. 4 WHEEL BRAKES. X.9940 I have come to the conclusion that it is nearly hopeless to try to get the high speed… | ||
| scan0225 | Potential improvements and faults related to the dynamo, brakes, and servo system. | ||
| View original record | contd:- -2- Also I should not touch the starter side of the box but if we can put the dynamo in a better place, and gear driven, it will be a definite improvement. I do not think there is any reason… | ||
| scan0226 | Secret memo discussing an experiment on four-wheel brakes by removing the non-wrapping shoe. | ||
| View original record | X. 9940 To Hs. from DA. S E C R E T. DA2/M29.1.24. E. A. C. FOUR WHEEL BRAKES. X. 9940 We telegraphed to you this morning suggesting trying removing the non-wrapping shoe from the rear axle so as to… | ||
| scan0227 | Confirmation of a telegram suggesting a test on rear brakes by removing the non-wrapping shoe. | ||
| View original record | X9940 CONFIRMATION OF TELEGRAM. WEST WITTERING. 29.1.24. HIVES, ROYCAR, DERBY. X. 9940 X. 3409 SUGGEST REMOVING NON-WRAPPING SHOE FROM REAR BRAKES FOR PURPOSE OF TEST THIS SHOULD DOUBLE APPARENT… | ||
| scan0228 | Alterations to the gearbox and engine for a 4-wheel brake system. | ||
| View original record | X9940 To R. from E/DA. c. to CJ. RG. c. to HS. BY. SECRET. EAC. E2/M29.1.24. RE. ALTERATION TO GEARBOX AND ENGINE FOR 4 WHEEL BRAKES. X.9940 X.9320 X.9660 We had reached the same conclusion at… | ||
| scan0229 | Secret memo discussing experiments to improve a high-speed servo for four-wheel brakes. | ||
| View original record | X. 9940 To R. from E/DA. c. to CJ. HS. S E C R E T. E3/M29.1.24. E. A. C. FOUR WHEEL BRAKES. X.9940 We note you think the high speed servo is nearly hopeless. The following experiments have yet to be… | ||
| scan0230 | Secret internal memorandum discussing the causes and potential solutions for brake jaggers. | ||
| View original record | To Hs. from Da. S E C R E T. X9940 DAL/M30.1.24. E. A. C. BRAKE JAGGERS. X.9940 X.3409 X.9550. With reference to your Hs3/LG28.1.24., covering a suggested explanation of the cause of brake jaggers, as… | ||
| scan0231 | Continuation of a document discussing requirements for a damping device. | ||
| View original record | contd:- -2- of this would be to give us an idea of whatsort of damping device would be required to damp it out. DA. [Faint background text: MADE AT CROXLEY] | ||
| scan0232 | Notes from a visit to Derby discussing R.A.C.S Brakes, gearbox modifications, and a separate unit servo. | ||
| View original record | V9940 To CJ. & H. c. Wor. c. Mr. c. Da. c. Hs. Rgl/WG. R. 24 VISIT OF E. & DA. TO DERBY, 6.2.24. The following notes were dictated during the meeting of the Design Committee at Derby mainly to discuss… | ||
| scan0233 | Proposal to modify a servo unit for testing with a new gearbox and a note on E.A.C. design discussions. | ||
| View original record | Rgl/W6. 2. 34 Page 2. When Derby receive more details of the servo, we propose to modify the separate unit servo to take the new pieces, so that we can actually test them before the new gear box with… | ||
| scan0234 | Potential improvements to the brake system, focusing on slow speed servos, brake shoes, and backward efficiency. | ||
| View original record | X.9940 To HS. RG. FROM R. E. DA. S E C R E T. R2/M7.2.24. c. to CJ. BJ. Wor. BY. EP. RE. BRAKES - JAGGERS AND BACKWARD EFFICIENCY. X.9940 Now that we have decided upon slow speed servo which can add… | ||
| scan0235 | Technical note comparing the Hispano arrangement to another design regarding wear on a lapping shoe. | ||
| View original record | contd:- -2- of weight upon it, because the lapping shoe forward is the one which must wear most. Probably this is the reason why the hispano arrangement is rather better than anticipated backwards,… | ||
| scan0236 | From Hs. to AJL. requesting a series of brake tests be carried out. | ||
| View original record | Y9910 To AJL. from Hs. 8.2.24. BRAKE TESTS. Will you please carry out the following tests on brakes and report to me. Brake jaggers. We wish to try on the toe of the wrapping shoe a 3" or more cast… | ||
| scan0237 | Secret memorandum detailing the plan and costs for a new front wheel brake scheme and experimental chassis production. | ||
| View original record | X.9940 WorS/MS/2/24. To DY. - from Wor. " C.Wd. - " " " V.Roy. - " " " "Scty. - " " " "Hg. - " " " "HSMITH- " " " "LP. - " " " " Hs. - " " " AEM. - " " " Others SECRET. I confirm my conversation with… | ||
| scan0238 | Outlining the production and testing schedule for the 40/50HP chassis and future material ordering. | ||
| View original record | -2- Wor3/MB/2/24. Re output of 40/50HP chassis, I have now got further information from Mr.Cowen as to his requirements, and he definitely states that we shall require to put on test complete chassis… | ||
| scan0239 | Comparing the weights and dimensions of Hispano and EAC.111 front brakes. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 4219/1659 REF: Hs1/LGS. 2. 24. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. S E C R E T. HISPANO BRAKES. Attached… | ||
| scan0240 | Continuation memo proposing a test on Hispano brakes to see the effect of heat on the drum. | ||
| View original record | contd:- -2- The steel liner in the brake drums is not scored on any of the drums. We are proposing to test one of the hispano brakes on our test rig so that we can see what happens to the drum if it… | ||
| scan0241 | Drawing of a front brake drum made from aluminium with a steel liner, showing dimensions and weight. | ||
| View original record | FRONT BRAKE DRUM MATERIAL. ALUMINIUM. WITH STEEL LINER .320 .480 2.50 .30 10 1/8 HOLES 4.925 DIAM 15.75 DIAM STEEL LINER WEIGHT = 16 lbs 9 oz | ||
| scan0242 | Cross-sectional drawing of a Hispano brake carrier. | ||
| View original record | HISPANO BRAKE CARRIER. ALUM. 1.00 5.5 RAD. .3 .275 TOTAL WT. OF CARRIER WITH CAM & PIVOT PINS = 8 lbs 6.7 RAD. .45 SECTN A.A. LOOKING IN DIRECTION OF ARROW. | ||
| scan0243 | Drawing of a Hispano Brake Carrier with material and weight specifications. | ||
| View original record | HISPANO BRAKE CARRIER TOTAL WT WITH CAM & PIVOT PINS = 8 lbs [WITHOUT SHOES] BOSS FOR GUIDE PIN FOR SHOE SECTN B B MATERIAL - ALUMINIUM. RIBS PIVOT PINS. .500 .275 12. 10 M/M HOLES. RIB .240. | ||
| scan0244 | Drawing of a 'Hispano' front shoe with dimensions and a cross-section view. | ||
| View original record | HISPANO FRONT SHOE. 12.2" SECTN. A.A. 2.5 .7 .3 .30 .25 2.4 | ||
| scan0245 | With remarks on a telegram regarding design revisions, testing, and production suitability of a drive system. | ||
| View original record | R R. 950 s (20 T) (S.B. 9'4. 5-9-19) G. 2470. HS To Rg. from CJ. To Wor. from CJ. To Hs. from CJ. To E. from CJ. To De. from CJ. .Y9940 CJ11/E11/2/24 Telegram from R. received 9 Feb. Remarks thereon.… | ||
| scan0246 | Secret internal memo responding to points raised about a telegram from Mr. Royce concerning gearbox and servo design. | ||
| View original record | V9940 To CJ. from DA/E. c. to RG. WOR. HS. SECRET. E1/M12.2.24. RE. TELEGRAM FROM MR. ROYCE RECEIVED 9th. FEBRUARY. X. 9940 Would you kindly note the following comments in reply to the points raised… | ||
| scan0247 | Modifications and schemes related to the braking system and associated components. | ||
| View original record | CJ. C. Wor. C. Hs. C. Ev. C. Der. BRAKES. CJ11/E11.2.24 (b) I agree with your remarks. (c) Apart from fitting the new gearbox, the fitting of the new front axle and dumb irons and the necessary link… | ||
| scan0248 | Chassis modifications for a trip to the South of France and competing with a Hispano racing car. | ||
| View original record | CJ. c. Wor. [crossed out] c. Hs. x9940 [handwritten, crossed out] Rg2/W13. 2. 24 x9940 / x4214 [handwritten] I do not think there is much use in a chassis with the slow speed servo going down to the… | ||
| scan0249 | Brake performance issues, specifically 'jaggers' and backward efficiency. | ||
| View original record | X.9940 S E C R E T. R3/M13.2.24. To HS. RG. } FROM R. E. A. C. E. BA. } c. to CJ. BJ. Wor. RE. BRAKES - JAGGERS AND BY. EP. BACKWARD EFFICIENCY. X.9940 Now that we have decided upon slow speed servo… | ||
| scan0250 | Secret memo discussing steering modifications to address friction and wobble caused by the introduction of front-wheel brakes. | ||
| View original record | To RG. E. } FROM R. DA. HS. } c. to CJ. PN. 29940 S E C R E T. STEERING - EACs. ETC. X.9420 X.9430 X.9940 With front wheel brakes we are obliged to overhang the road wheels more, and incline the… | ||
| scan0251 | Abandonment of a high-speed servo brake system and the resulting design challenges and considerations. | ||
| View original record | To HS. RG. E. DA. FROM R. 49940 SECRET. R4/M14.2.24. E.A.C. BRAKES. X.9940. Very many thanks to HS. for the memo. of his tests dated 7.2.24. To avoid any loss of time I am writing all I think would be… | ||
| scan0252 | Secret memo discussing proportionate braking, servo wear, and the design of the equaliser system. | ||
| View original record | x9940 To HS. from R. c. to CJ. RG. PN. E. DA. S E C R E T. R2/M15.2.24. X.9680 X.9946 X.9940 RE. PN'S CAR AND PROPORTIONATE BRAKING. My impression is that PN. was braking his car with his front wheel… | ||
| scan0253 | Secret memorandum on four-wheel brakes, discussing weight reduction by using aluminium or duralumin. | ||
| View original record | X9940 To DA. RG. E. from R. c.c. to CJ. BY. BJ. WOR. HS. PN. S E C R E T. E. A. C. FOUR WHEEL BRAKES. X.9940 X.4214 X.9930. Owing to the more general use of steel our brakes seem to have come out… | ||
| scan0254 | Brake investigations, comparing wear on jointed and standard brake shoes. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. X9940 EXPERIMENTAL REPORT. COPIES TO: R.C.J BJ. WOR. By E. Da EP. PN OY. RG Expl. No. 9940 REF. Hs3/LG15. 2. 24. OBJECT OF TEST. Investigations on Brakes.… | ||
| scan0255 | The performance and wear characteristics of jointed brake shoes. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs/Rm/LG15. 2. 24. JOINTED SHOES. We have carried out a number of tests of the jointed shoes on our brake testing… | ||
| scan0256 | The wear and efficiency of wrapping and non-wrapping brake shoes. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs/Rm/LG15.2.24. WORST WEAR HERE .018" .009" .007" .002" Wear on wrapping shoe after absorbing 21 HP.hrs. at 300… | ||
| scan0257 | Schemes and ideas for a bi-directional servo braking system. | ||
| View original record | To HS. RG. from R. c. to CJ. BJ. Wor. E. DA. BY. PN. S E C R E T. X9940 R1/1M5.2.24 E. A. C. RE. BACKWARD BRAKING. X. 9940 Mr. Rowledge has sent me an idea for making the servo act both ways. I fear… | ||
| scan0258 | New internal and external gear scheme, comparing it to other designs and seeking opinions. | ||
| View original record | -2- may be used forward and silent ones backward. here is one of the best gears - i.e. internal and external :- SEE ORIGINAL FOR SKETCH. I am not sure that I got this scheme so simple before. Will… | ||
| scan0259 | The co-efficient of static friction for Ferodo brake shoes. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. To R. from Hs/Rm. c. to CJ. RG. c. to E. DA. c. to EY. WOR. Expl. No. 9940 REF: Hs/Rm2/LG19.2.74. S E C R E T. CO-EFFICIENT OF STATIC… | ||
| scan0260 | Secret memo discussing design schemes for the EAC.3 servo, brakes, and hand-starting shaft. | ||
| View original record | X9940 To CJ. & R. from DA/E. c. to Wor. Rg. By. Hs. SECRET. E. A. C. E1/M21.2.24. RE. VISIT OF RG. TO WW. ON 19.2.24. X.9770 X.9940 The whole of the designs of the EAC.3. slow speed servo scheme… | ||
| scan0261 | Copy of a telegram from Mr. Royce discussing patents, servos, brakes, and steering design. | ||
| View original record | 79940 To Hives, Olley, Hs., Da. from Rg. COPY OF TELEGRAM RECEIVED FROM MR. ROYCE, 21ST FEBRUARY 1924. ROWLEDGE REGARDING PATENT FOR FOOT ASSISTED RATCHET DRIVEN SLOW SPEED SERVO PRESS COMBINED… | ||
| scan0262 | Testing alternative friction materials for the brake servo and investigating unequal pressure distribution. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to EY. WOR. X9240 Expl. No. 9940 3409 REF: Hs9/LG22.2.24. SECRET. BRAKES. It would appear… | ||
| scan0263 | Copy of a telegram from Mr. Royce regarding brake system design and testing. | ||
| View original record | Copy to Wor. Ey. Hs. De. Er. from Rg. V9940 COPY OF TELEGRAM RECEIVED FROM MR. ROYCE, 23 FEBRUARY 1924 SINGLE RATCHET BETWEEN SERVO AND BRAKE LEVER WITH ANOTHER BALL THRUST BEING SIMPLE AND MAY AVOID… | ||
| scan0264 | Secret internal memo discussing three major design issues: patents, steering shocks, and a heated dynamo. | ||
| View original record | To RG. E. DA. from R. c. to CJ. HS. BY. X9940 S E C R E T. R2/M23.2.24. E. A. C. X.9770 X.4214 X.9940. You will see by my telegram that we seem still in trouble to get EAC.3. satisfactory, in spite of… | ||
| scan0265 | Improvements for the front brakes of the 40/50 HP car. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. RG. c. to Da. E. c. to EY. Wor. Expl. No. 9940 REF: Hs1/LG23.2.24. S E C R E T. BRAKES. We have now had… | ||
| scan0266 | Page 2 of an experimental report with recommendations for brake, pivot and axle components. | ||
| View original record | R.R. 493A (40 H) (EL 42 12-7-23). J.H., D. -2- EXPERIMENTAL REPORT. Expl. No. 9940 REF:Hs1/LG23.2.24. (4) On the pivot which carries the steering lever, two of the nuts which hold the brake on to the… | ||
| scan0267 | Secret internal memorandum discussing brake shoe design to improve backward braking. | ||
| View original record | 49940 To HS. from DA. c. to RG. S E C R E T. DA1/M27.2.24. E. A. C. RE. BRAKE SHOES. X.9940. X.3409. Mr. Royce has repeatedly urged the use of a longer shoe backwards than forwards to improve backward… | ||
| scan0268 | Inquiring about results for existing designs and semi-flexible steel shoes. | ||
| View original record | contd:- -2- heard some results from the designs you already have. This is in view of the urgent other work we have in hand at the present minute. We presume that there are not yet any results from the… | ||
| scan0269 | Steering tests, detailing modifications and the effects of a front wheel brake axle on a 40/50 HP car. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. RG. c. to E. DA. c. to BY. WOR. Expl. No. 9940 REF: Hs3/LG28. 2. 24. S E C R E T. EAC. STEERING TESTS. Our… | ||
| scan0270 | Modifications to a front wheel brake car's springs, radius rods, and steering. | ||
| View original record | contd:- -2- 3. We are now fixing up a front wheel brake car with the correct front springs and anchored rear end which allows us to get rid of the radius rods and also put back the standard nut-worm… | ||
| scan0271 | Steering issues on 40/50 HP models after the fitment of 4-wheel brakes. | ||
| View original record | SFT. from Hs. 4-WHEEL BRAKES ON 40/50 HP. At the moment we are concerned with the fact that on the standard 40/50 cars which have been fitted with 4-wheel brakes, the steering is not as good as on the… | ||
| scan0272 | Modifications and the implementation of a 4-wheel brake system. | ||
| View original record | -2- We understand R. has suggested a number of modifications. From experience we know that after the first car is tried, there will sure to be other modifications. There are still a number of points… | ||
| scan0273 | Recommendation of a modified semi-servo brake system and comparing it to other systems. | ||
| View original record | X9940 SECRET. R1/M1.3.24. To DA. & HS FROM R. c. to CJ. BJ. Wor. RG. E. BY. Mr. Claremont. E. A. C. X.9940 X.4214 RE. BRAKE SYSTEM. For various reasons and principally to avoid the Hispano and other… | ||
| scan0274 | Continued memo discussing issues with servos, braking systems, and competitor patents from Renault and Hispano. | ||
| View original record | contd:- -2- accurately divided. (3) Unreliable servo, heating, wearing and oil. (4) The Hispano and no other has truly proportioned braking except by careful adjustment. We still have to avoid Renault… | ||
| scan0275 | Secret memo detailing a modified semi-servo brake operating system, referred to as the 'R.R.M.' scheme. | ||
| View original record | To HS. & DA FROM R. SECRET RL/M3.3.24. c. to CJ. BJ. RG. WOR. E. BY. Mr. Claremont. E.A.C. BRAKE OPERATING SYSTEM. X.9940 X.4214 Referring again to my memo of yesterday, for convenience I designate… | ||
| scan0276 | Note discussing brake wear, servo heat, and the use of an equaliser for back brakes. | ||
| View original record | contd:- The wear of the brakes is the same: the heat and wear of the servo is less because of the greater angle of action. This I know we were going to increase over the Hispano, but we can still… | ||
| scan0277 | Comparing different brake systems and advocating for a proprietary design. | ||
| View original record | Y9940 To DA. & BS. from R. c. to CJ. BJ. RG. PN. WOR. E. BY. Mr. Claremont. SECRET. R1/M4.3.24. E. A. C. RE. BRAKE OPERATION. X.9940 X.4214 Referring to RRM. and other systems, I find I made an error… | ||
| scan0278 | Potential improvements to brake protection systems. | ||
| View original record | X. 9940 To DA. RG. E. FROM R. S E C R E T. R5/M6.3.24. c. to CJ. HS. PN. BY. E. A. C. RE. BRAKE PROTECTION. X. 9940. See Mr. Hives' memo. of 23.2.24. Will DA. RG. and E. do all possible to provide… | ||
| scan0279 | Development and testing of two brake servo schemes. | ||
| View original record | X.9940 To HS. & ST. FROM R. c. to CJ. BJ. Wor. E. RG. BY. Mr. Claremont. S E C R E T. E. A. C. RE. BRAKE OPERATION. X.9940 Don't lose time but concentrate on 2 schemes only and look out for Mr.… | ||
| scan0280 | Brakes Scheme DES. 60 for a 40/50 car, focusing on servo performance. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. √9940 EXPERIMENTAL REPORT. Expl. No. 1559 9940 4214 REF: Hs1/LG10.3.24. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. S E C R E T. BRAKES - SCHEME… | ||
| scan0281 | Report page discussing dissatisfaction with the mechanical details of a vehicle under test. | ||
| View original record | contd:- -2- definite advantage because it would allow a car to be made in which the driving operations were all light ones. We are not satisfied that the mechanical details on the one we are testing… | ||
| scan0282 | Design and testing of a four-wheel brake servo system, designated DES.60. | ||
| View original record | R.(at Le Canadel) C.L/S.F. [Struck through] C. H.S. [Struck through] C. Hoyes [Struck through] C. Hs. SECRET X9940 Rg3/W10. 3. 24 FOUR WHEEL BRAKES. With regard to DES.60, we are adopting this… | ||
| scan0283 | Page 2 of a memorandum discussing stress ratios, mentioning a Mr. Stent and project EAC.1. | ||
| View original record | contd:- -2- with quarter the stress. Mr. Stent will appreciate the value of this which would have saved us much anxious thought. EAC.1. had about this ratio. R. | ||
| scan0284 | The urgent order and machining of 100 sets of front wheel brake material. | ||
| View original record | To: [Redacted] Hs. Dy. Wd. Day. Set. - from Wor. Secret X9940 Wor1/M11/3/24. Front Wheel Brake Material. -------------------------- In a memo - ref.Wor2/M10/3/24 - copy of which is attached, you will… | ||
| scan0285 | Outlining a revised production programme for various chassis series and the introduction of front wheel brakes. | ||
| View original record | To Hs. - from Wor. c. to Hs. Wor2/M10/S/24. Re Programme. In reply to your CJ11/E6/3/24 below are replies to the questions mentioned therein:- (1) You are quite right in believing that up to No.50 "T"… | ||
| scan0286 | Chassis production and testing schedule, addressing potential bottlenecks, and requesting an increase in authorised sets. | ||
| View original record | -2- Commencing Apl. 16th. to W.E. 23rd......6 W.E.Apl. 30th......10 " May 7th......14 " " 14th......18 " " 21st......20 " " 28th......20 " June 4th......22 " " 11th......22 " " 18th......22 " "… | ||
| scan0287 | Production schedules for E.A.C.II and E.A.C.III chassis and ordering materials for a front wheel brake scheme. | ||
| View original record | -3- Wor2/M10/3/24. As to the extra 25 sets of E.A.C.III material beyond the 50 sets for "U" series for which we are asking your authority to order, we might point out that even if we produce the… | ||
| scan0288 | Telephone message from CJ concerning the urgency for Mr. Royce to see the chassis fitted with brake scheme Des. 60. | ||
| View original record | x9940 TELEPHONE MESSAGE FROM CJ. ------------------------ I STILL THINK THAT IT IS VERY IMPORTANT THAT MR. ROYCE SHOULD SEE THE CHASSIS FITTED WITH THE SUGGESTED BRAKE SCHEME DES. 60 AT THE EARLIEST… | ||
| scan0289 | Car tests concerning the braking servo, engine component arrangement, and exhaust system power loss. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs3/LG13.3.24. To R. from Hs. c. to CJ. RG. c. to E. DA. c. to BY. WOR. S E C R E T. BRAKES. R-R AGREED SCHEME. We… | ||
| scan0290 | To Mr. Ellison confirming the retention of removed brake parts and levers. | ||
| View original record | Mr. Ellison from Hs/Rm. Xgauto Hs/Rm4/LG14. 3. 24. We are retaining the brake parts and levers which we removed this morning -and thank you for same. Hs/Rm. DICKINSON BOND | ||
| scan0291 | Design and performance of a brake servo system, comparing it with a Hispano system. | ||
| View original record | To HS. DA. FROM R. SECRET [Handwritten, crossed out: X9940] R3/M14.3.24. c. to CJ. BJ. RG. E+ BY. PN. E.A.C. RRM. BRAKE SYSTEM. X.9940 X.4214 You will notice that I suggested the servo should do six… | ||
| scan0292 | Brake and gear design schemes following a meeting at Le Canadel. | ||
| View original record | X 9940 To DA. & E. FROM R. S E C R E T. R5/M22.3.24. E. A. C. BRAKES. X.9940 MEETING AT LE CANADEL. (RG. HS. & R.) We are going on with agreed scheme (without ratchet) but with Mr. Rowledge's DES.60.… | ||
| scan0293 | General review of the four-wheel brakes situation, including axles, operation and servo speed. | ||
| View original record | To RG. DA. E. FROM R. c. to CJ. BJ. HS. Wor. PN. MR. CLAREMONT. X.9940 S E C R E T. R1/M24.3.24. E. A. C. GENERAL REVIEW OF FOUR WHEEL BRAKES SITUATION. X.9940 It will be seen that I have been willing… | ||
| scan0294 | Brake servo performance, addressing issues like 'jaggers' and proposing alternative mechanical schemes. | ||
| View original record | contd: -2- slow speed servo) for two reasons :- (1) heating, and wear of servo. (2) Gentle application even at high engine speeds. If we do not keep to this gentle application we shall get 'jaggers'… | ||
| scan0295 | Continued memo discussing testing designs on the drawing board and a potential fault of lag. | ||
| View original record | contd:- -3- very difficult. Nos. 3 and 4 should be tried out on the drawing board first and a recommendation made unless we can test both. Naturally I may have exaggerated the fault of lag but this… | ||
| scan0296 | Internal memorandum requesting braking performance data for two-wheel versus four-wheel systems for a police court case. | ||
| View original record | [Handwritten Notes] TO Rg. c. to BY. PAS Will you please deal with this direct or let me know the necessary information. PN3/DN/25.3.24 as information to P.N. FROM P.N. He also asked for this last… | ||
| scan0297 | The combination of the RRM and DES.60 brake operation schemes into a single design for testing purposes. | ||
| View original record | X.9940 To RG. DA. ) E. HS. ) FROM R. S E C R E T. R2/M25.3.24. E.A.C. BRAKE OPERATION. COMBINED RRM. & DES.60. X.9940. Since writing yesterday I have thought that at present we now only want one… | ||
| scan0298 | Mechanical gain and friction theories for a new slow-speed servo braking scheme. | ||
| View original record | To HS. from DA. X9940 SECRET. DA2/26324. E. A. C. RE. 'AGREED' & RRM. SCHEMES OF BRAKING. X.9940 X.3409 We wired you this morning asking for the mechanical gain from the new slow speed servo and we… | ||
| scan0299 | Continued page describing a test method for tying two plates together using pins. | ||
| View original record | contd:- -2- it would be possible to test by putting pins to tie the 2 plates together at as big a radius as possible, that is, just underneath the ferodo plates themselves. DA. | ||
| scan0300 | Vehicle braking, comparing the performance of 4-wheel brakes with rear-wheel only brakes. | ||
| View original record | R.R. 493A (40 H) (BL 42 12-7-23). J.H. D. 49940 EXPERIMENTAL REPORT. Expl. No. 9940 REF: H28/LG26.3.24. to PN. from Hs. c. to EY. S E C R E T. BRAKING. With reference to your PN3/DN25.3.24. It is… | ||
| scan0301 | Summary of the development and testing of a four-wheel brake system, debating desired brake effect and servo multiplication. | ||
| View original record | X.9940 S E C R E T. To DA. RG. ) E. HS. ) FROM R. c. to CJ. BJ. BY. PN. Mr. Claremont. E. A. C. FOUR WHEEL BRAKE SUMMARY. X.9940 In all the RR. cars tested I had the impression that they kept straight… | ||
| scan0302 | Improvements to a servo system, referencing patents, road testing, and contributions from various individuals. | ||
| View original record | -2- The only possible improvement on the combined scheme that we know of is the double ratchet drive. It may not be free from the Hispano patent, but I would permit of a still slower forward running… | ||
| scan0303 | Reasons for adopting specific lever lengths in an agreed brake system, including calculations. | ||
| View original record | X.9940 S E C R E T. DA1/M27.3.24. To R. from DA. c. to CJ. RG. HS. BY. PN. E. A. C. AGREED & REM. BRAKE SYSTEM. X.9940 Referring to your remarks re. the length of pressure screw operating levers on… | ||
| scan0304 | Page 2 of a memo detailing calculations for a braking servo system, including friction coefficients, loads, and torque. | ||
| View original record | contd:- -2- So we appeared to have a margin even with this angle of thread. But we realised that the co-efficient of friction was the doubtful point, and so on LeC.1828 Mr. Stent put a note pointing… | ||
| scan0305 | Calculations for servo torque, load on jaws, and friction coefficients. | ||
| View original record | contd: -3- Taking the agreed scheme for instance - 1/2 servo torque = 750 lbs.ins. M.R. of jaws .575 Load on jaws 750/.550 = 1362 lbs. If the co-efficient of friction between jaws should be .2 (being… | ||
| scan0306 | Secret memorandum detailing design changes and instructions for the RRM Brake System. | ||
| View original record | X.9940 To BY. HS - FROM DA. S E C R ET. DA1/M2 7.3.24. E.A.C. RRM. BRAKE SYSTEM. X.9940 Referring to N.sch.1769 - the thread in the screw was intended to be 45°. We did not instruct it as we intended… | ||
| scan0307 | Secret report on brake systems and proposed alterations to exhaust pipes, silencers, and manifolds for specific EAC projects. | ||
| View original record | To R. from E. c. to CJ. HS. BY. [Handwritten] X9940 SECRET. E.A.C. WW. REPORT. X.9940 X.923o X.9490 As many as possible are working on the brake systems to be finished this week. There is however not… | ||
| scan0308 | The dangers of fitting front brakes to cars with steel artillery wheels due to excessive wheel overhang. | ||
| View original record | To C.J. from Hs. x9940 HsL/LG1.4.24. STEERING OF ALL CARS. x9940(crossed out) x963 +4586 With reference to the attached ref. R1/M29.3.24. The reason steel artillery wheels or any other type of wheel… | ||
| scan0309 | Secret report discussing brake gear schemes, referencing a blueprint and proposing alternative constructions and lubrication methods. | ||
| View original record | X.9940 To R. from E. S E C R E T. E1/M1.4.24. c. to CJ. BY. E. A. C. WW. REPORT. X.9940 Referring to the RRM. and M.DES.60 brake gear schemes, I have not personally been able to do much actual drawing… | ||
| scan0310 | Bump test for the 40/50 chassis front brakes and springs. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. x9940 EXPERIMENTAL REPORT. Expl. No. REF:HS3/LG2.4.24. To R. from Hs. c. to CJ. RG. c. to E. DA. c. to BY. WOR. S E C R E T. x9940 x1331 BUMP TEST - 40/50… | ||
| scan0311 | Bump test for a new front spring rear anchorage, detailing component breakages over time. | ||
| View original record | BUMP TEST OF NEW SCHEME OF FRONT SPRINGS REAR ANCHORAGE (N.SCH.1706.) Conditions of test :- Drum = 105 r.p.m. Cams. = 2" lift. Tyres = 65 lbs./sq.in. Load = 600 lbs. + top half crankcase and full… | ||
| scan0312 | Log of component breakages during testing, detailing running times and failure descriptions. | ||
| View original record | Total running time. hrs.mins. | Piece No. | Running time. hrs.mins. | BREAKAGES. Description and remarks. 37 43 | K.5422 | 7 45 | Front clip of rear side front spring broken. 38 43 | F.71009 | 24 43 |… | ||
| scan0313 | Log sheet detailing component breakages and failures with corresponding running times and part numbers. | ||
| View original record | Total running time. hrs.mins Piece No. Running time. hrs.mins BREAKAGES. Description and remarks. 73 5 | F.71009 | 18 30 | O.S. front spring (Firth 1250 lbs.) top leaf broken 2" to front of centre… | ||
| scan0314 | Log of component breakages with corresponding running times and piece numbers. | ||
| View original record | Total running time. hrs. mins. | Piece No. | Running time. hrs. mins. | BREAKAGES. Description and remarks. 96 45 | F.4614 | 9 0 | Front buffer spring broken, front joint side steering tube. | F.4614… | ||
| scan0315 | Log of important component failures with corresponding running times, excluding frame and springs. | ||
| View original record | IMPORTANT FAILURES - (excluding Frame & Springs) Piece No. | Running time. hrs. mins. | Remarks. F.887 | 67 | 23 | Steering column tube broken immediately above worm. F.6979 | 67 | 23 | Cross-tie of… | ||
| scan0316 | Bump test comparison of new Firth road springs against standard pattern springs, analysing failures, life, and fracture positions. | ||
| View original record | BUMP TEST COMPARISON. Comparison of new type Firth road springs with std. pattern. SPRING FAILURES. | SPRINGS. | No. of failures. | | | Running time of tests. | |---|---|---|---|---| | | O.S. | N.S. |… | ||
| scan0317 | Summary of frame failures from a bump test, detailing cracks with corresponding running times and sketches. | ||
| View original record | BUMP TEST SUMMARY CONT'D (N.SCH. 1706) FRAME FAILURES. SHEET 4. TABLE OF FAILURES: Piece N^o | Running Time (HRS MINS) | Remarks. F2888 | 16 - 15 | Near-side flange 3rd cross-member cracked (Sketch 1)… | ||
| scan0318 | Testing of alternative oils and the policy on recommending them versus selling them for profit. | ||
| View original record | x9940 (handwritten) WOR. from Hs. Hsl/LG3.4.24. RE. ALTERNATIVE OILS. x9940 / x1588 (handwritten) We had anticipated being in a position to report on the above before now but we arranged that our… | ||
| scan0319 | Component failures and modifications following a bump test on front brakes and steering. | ||
| View original record | Y9940 To HS. from DA. DA2/M5.4.24. BUMP TEST - 40/50 FRONT BRAKES. X.1331 X.9940 Referring to your HS3/LG2.4.24., is not the failure of the worm tube quite unique? Presumably you are satisfying… | ||
| scan0320 | Broken worm tube sent for examination. | ||
| View original record | To Despatch Stores. c. Shipping Office. X9940 Hs7/T7.4.24. RE BROKEN WORM TUBE. We are sending into the Despatch Stores for despatch to Mr. Day, West Wittering, for his examination:- 1 Broken Worm… | ||
| scan0321 | Broken worm tube from a 40/50 front brake bump test and difficulties with the steering lock. | ||
| View original record | To Da. from Hs. X9940 Hs5/T7.4.24. BUMP TESTS - 40/50 FRONT BRAKES. X1331/X9940 We are sending to you the broken worm tube. This is the first example we have known of such a failure on the bump test.… | ||
| scan0322 | Development and issues with a four-wheel brake system. | ||
| View original record | Mr.(Chairman-Council) Mr.Hives Mr.Bailey Mr.Hall C. Hs. Reakes Foremans FOUR WHEEL BRAKES. He. has reported various matters that are very important with regard to the designs now going through. In his… | ||
| scan0323 | Minutes from a design committee meeting discussing issues with a flat plate servo and proposed adjustments. | ||
| View original record | S(c to Dr. Olley) OA SPT Mr. Hives Mr. Day Hs. Wg. 4940 Rg3/WD. 4. 24 SECRET DESIGN COMMITTEE MEETING AT DERBY. 8th & 9th. APRIL. Present Mr. Da., Mr. Pls. Mr. A Hs. SERVO. The question of the… | ||
| scan0324 | Servo adjustment, steering lock experiments, brake joint protection, road shock transmission, and brake jaggers. | ||
| View original record | Rg3/W9. 4. 24 ==== Sheet 2. ==== The self-registering clearance for the servo adjustment, as designed, is not working satisfactorily. Modifications to this are being considered. STEERING LOCK.… | ||
| scan0325 | Typed report page discussing design points and the question of dates. | ||
| View original record | Rg3/W9. 4. 24 Sheet 3. Now that we have had a full discussion of the design points, Wor. is going into the question of dates. Rg. [Watermark] DICKINSON BOND 1804 MADE AT CROXLEY | ||
| scan0326 | Progress on an urgent experimental aero job (M.DES.60), specifically concerning pedal pressure. | ||
| View original record | R.(to Ld. Camdeck) C.C. Cd. C.C. Ed. C.C. Ms. c. Hs. +9940 Rg5/W9. 4. 24 Referring to my memo of Monday last (Rg1/W7.4.24), E. and Da. have visited us, and I think we have gone over the ground… | ||
| scan0327 | Design of brake operating gear, focusing on pin sizes, servo performance, and the co-efficient of friction. | ||
| View original record | X.9940 To DA. HS - from R. c. to CJ. RG. E. BY. S E C R E T. R4/M10.4.24. E.A.C. BRAKE OPERATING GEAR - (COMBINED SYSTEMS - N.SCH.1782) - X.9940. As far as I can see this seems about right, but pins… | ||
| scan0328 | Secret memo regarding modifications to the brake operating system leverage. | ||
| View original record | To BY. from DA. c. to CJ. RG. Hs. X. 9940 S E C R E T. DA3/M11.4.24. E.A.C. RE. BRAKE OPERATING SYSTEM M. DES. 60. X. 9940 In view of our experience of the car with the agreed scheme of braking on… | ||
| scan0329 | Suggested modifications to a braking system, including lever lengths and alternative schemes. | ||
| View original record | X.9940 To BY. from DA. c. to CJ. HS. S E C R E T. DAL/M1 1.4.24. E. A. C. AGREED BRAKING SYSTEM. X.9940. Herewith we send N.sch.1786., shewing some suggested modifications to the braking system fitted… | ||
| scan0330 | Secret memorandum about the requirement to design new parts to apply front wheel brakes to the short type chassis. | ||
| View original record | x9940 To DA. from Hs. c. to BY. RG. c. to Wor. S E C R E T. E.A.C.111. Hs7/LG11.4.24. X.9770 X.9940 So far, all the schemes got out for EAC.111 chassis only apply to the long type chassis. It is… | ||
| scan0331 | Design issues and theories related to four-wheel braking systems and servo performance. | ||
| View original record | X.9940 To DA. & E. from R. c. to CJ. RG. HS. BY. SECRET. E. A. C. FOUR WHEEL BRAKES. X.9940 RG's memo. is disappointing about the above. In the new design there should be no doubt about braking coming… | ||
| scan0332 | Various brake servo system designs, comparing shoe types and servo layouts. | ||
| View original record | -2- (4) My long rigid shoe theory, although shortening the shoes seemed to cure the trouble, it however was reported to be so because it destroyed the efficiency of the brakes. (Semi-flexible shoes,… | ||
| scan0333 | Modifications and testing of a four-wheel brake system and steering lock. | ||
| View original record | R. (at his convenience) Mr. [redacted] Mr. [redacted] Mr. [redacted] Mr. [redacted] c. Mr. c. Mr. 49940 SECRET FOUR WHEEL BRAKES. In my memo Rgl/W7.4.24 I said that I thought it would be a long time… | ||
| scan0334 | Progress report on the testing of four-wheel brakes and front axle assemblies, discussing patent issues, performance, and future testing requirements. | ||
| View original record | Rgl/W16. 4. 24 Sheet 2. As mentioned above, the agreed scheme is now working very well, and if it were not for the patent situation would be one that we could give to customers. Further, at present… | ||
| scan0335 | Secret internal memo discussing the progress and design of the EAC.3 four-wheel brake system. | ||
| View original record | X.9940 To HS. E. RG. } FROM R. S E C R E T. R1/M16.4.24. DA. E. A. C. FOUR WHEEL BRAKES. X.9940. It seems that if we are not too ambitious for very vigorous front wheel braking, and extremely light… | ||
| scan0336 | Car tests in France, detailing axle modifications, steering bolt issues, and brake performance. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-28). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9941 / 7740 REF Hs4/LG16.4.24. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. SECRET. TESTS WITH EAC.11, CARS IN… | ||
| scan0337 | The M.DES.60 brake scheme, noting its excellent performance but a tendency to skid on wet and greasy roads. | ||
| View original record | R.R. 483A (20H) (D.A. 652 20-3-24) J.H.D. 49940 EXPERIMENTAL REPORT. Expl. No. 9940 REF: HsB/LG23.4.24. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. S E C R E T. BRAKES. Due to the… | ||
| scan0338 | Test report on an experimental four-wheel braking system, noting issues with brake balance and performance. | ||
| View original record | f9940 PN6/DN/23.4.24. TO Hs. FROM P.N. I ran the Experimental car having the four wheel brakes, about 300 miles and found that for high speed touring, the braking forward was very pleasant and… | ||
| scan0339 | Design committee meeting minutes concerning four-wheel brakes and various component modifications. | ||
| View original record | X9940 R. CJ. BJ. Mor. E. Ba. Hs. Hy. FOUR WHEEL BRAKES. Design Committee Meeting Also present Mr. and Hs. A meeting was held primarily to discuss the position of the material that can be ordered for… | ||
| scan0340 | Design committee meeting minutes discussing material ordering for various car components. | ||
| View original record | SECRET 49740 Rg5/W24. 4. 24 [REDACTED] FOUR WHEEL BRAKES. Design Committee Meeting Also present Mr. and Hs. A meeting was held primarily to discuss the position of the material that can be ordered for… | ||
| scan0341 | The performance of a car with an M.I.H.60 Servo and modifications to the operating levers. | ||
| View original record | Sheet 2. SERVO. As Hs. has reported, the car with the M.I.H.60 Servo has been completed and run three days before it was promised. This was a very helpful performance on the part of the Works. Minor… | ||
| scan0342 | 4-wheel brakes and servo systems under the RRM scheme. | ||
| View original record | R.R. 493A (20H) (D.A. 652 20-3-24) J.H.D. Expl. No. 9940 / 4214 REF: Hs1/LG28.4.24 EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. SECRET. EXPERIMENTS ON 4-WHEELBRAKES.… | ||
| scan0343 | Comparing the performance of the 'RRM' and 'Agreed' braking schemes, focusing on servo assistance and lag. | ||
| View original record | -2- EXPERIMENTAL REPORT. Expl. No. 9940 4214 REF: Hsl/LG28.4.24. The RRM. scheme is working remarkably well. It is practically impossible under any condition to know that there is any relay system… | ||
| scan0344 | The operation of the brake pedal and servo assistance mechanism. | ||
| View original record | R.R. 493A (20H) (D.A. 652 20-3-24) J.E.D. -3- Expl. No. 9940 REF: Hsl/LG28.4.24. 4214 EXPERIMENTAL REPORT. brake pedal - the first effect is caused by the resistance of the brake pull off springs and… | ||
| scan0345 | Comparing the performance of an 'agreed' servo brake scheme with the Hispano system. | ||
| View original record | R.B. 493a (20H) (D.A. 552 20-8-24) J.E.D. -4- EXPERIMENTAL REPORT. Expl. No. 9940 4214 REF: Hsl/LG28.4.24. resistance is suddenly overcome. The 'agreed' scheme has been improved by reducing the power… | ||
| scan0346 | The M. DES. 60 servo braking scheme, detailing its jerky operation and modifications to reduce friction. | ||
| View original record | R.B. 493A (20H) (D.A. 652 20-8-24) J.E.D. -5- Expl. No. 9940 / 4214 REF: Hs1/LG28.4.24. EXPERIMENTAL REPORT. M. DES. 60 SCHEME. This scheme has a similar fault to the 'agreed' scheme caused by the… | ||
| scan0347 | Design committee meeting report on experiments with four-wheel servo-assisted brake systems, comparing various schemes. | ||
| View original record | SECRET 9940 R. Cl. H. Ms. Hy. ExL. FOUR WHEEL BRAKES. E.A.C. 3 DESIGN COMMITTEE MEETING Also present Mr. A. By. We now have running on our experimental cars three modifications of the servo system,… | ||