Rolls-Royce Archives
| Identifier | Entry | ||
| scan0001 | Secret memorandum discussing steering and road shock issues related to steering pivots and front wheel brakes. | ||
| View original record | X9820 To Hs. from R. To DA. S E C R E T. R2/M26.2.24. c. to CJ. BJ. Wor. RG. E. PN. BY. STEERING AND ROAD SHOCKS. X.9820 X.9420 X.9430 I think Mr. Hives has done well if he has found these to increase… | ||
| scan0002 | Potential causes and solutions for steering problems like shocks and wobbles. | ||
| View original record | contd:- -2- SEE ORIGINAL FOR SKETCH. I was rather expecting to hear further. I am assuming that previously we have had shocks to the steering wheel due to imperfect geometry, and that this last reason… | ||
| scan0003 | Comparing steel artillery wheels against wire wheels and their effect on steering. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. X9820 REF Hs4/LG27.2.24. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to EY. WOR. S E C R E T. X9430 EAC. STEERING. X9820… | ||
| scan0004 | Secret memorandum discussing front axle design, wheel standardization, and steering with front wheel brakes. | ||
| View original record | 49820 To DA. & E. from R. S E C R E T. R1/M22.3.24. c. to CJ. Wor. RG. PN. BY. HS. E. A. C. MEETING AT LE CANADEL (RG. HS. & R.) STEERING WITH FRONT WHEEL BRAKES. X.9420 X.9820 X.9430 FRONT AXLE.… | ||
| scan0005 | Use of Sankey type steel artillery wheels for MAC.2, 3, and Goshawk models. | ||
| View original record | X9820 S E C R E T. R1/M26.5.24. TO BJ } DA } FROM R. BY } c. to HS. E. A. C. X.4586 X.9820 RE. ARTILLERY WHEELS. Regarding steel artillery wheels - Sankey type - for MAC.2 and 3., and Goshawk, I… | ||
| scan0006 | Modifications to steel artillery wheel fixings, including a novel self-adjusting washer system. | ||
| View original record | X9820 SECRET. TO CJ. BJ. BY. HS. EP. MR. CLAREMONT. FROM R. R5/M16.7.24. E. A. C. STEEL ARTILLERY WHEELS. X.4586 X.9820 DA. is just about completing the artillery wheel hub and fixing for EAC.3. and… | ||
| scan0007 | Modifications to steering artillery wheels and a patent for a slipping washer design. | ||
| View original record | To BY. from DA. c.c. to CJ. HS. SECRET. DA1/M17.7.24. E.A.C. 2 and 3. STEERING ARTILLERY WHEELS. X.4586 X.9820 We send herewith N.sch.1821, shewing the above wheels for front and back axles. We… | ||
| scan0008 | New design for fitting steel artillery wheels on Dunlop hubs. | ||
| View original record | X9820 To BY. from R. c. to CJ. BJ. RG. HS. PN. C. H. S E C R E T. E.A.C. 2 & 3. R5/M18.7.24. RE. STEEL ARTILLERY WHEELS ON DUNLOP HUBS. X.4586 X.9820 (1) As mentioned in a recent memo, we now have a… | ||
| scan0009 | Procurement of test bodies for new car models, emphasizing a discreet method to avoid trade rumours. | ||
| View original record | To Hs. from BJ. BJ19/H3.1.23. X9840 RECEIVED 11 JAN 1928 BODIES FOR TESTING "SEAGULL." You mentioned a little time ago that you would probably require some bodies for testing the Seagull, or Heron, or… | ||
| scan0010 | Requesting updates on the design and manufacture of a speed touring body for 'Seagull' or 'Heron' models. | ||
| View original record | X9840 (crossed out) To Hs. from Da/Ev. Da/Ev2/M18.1.23. X9840 RE. SPEED TOURING BODY FOR "SEAGULL" OR "HERON" X.4118. (crossed out) We would like you to keep us informed as to what is happening with… | ||
| scan0011 | Design of bodies for the 40/50 chassis, experimental work, and blueprint requirements. | ||
| View original record | BJ. from Hs. X9840 Hs2/LG24.1.23. BODIES FOR 40/50 CHASSIS. X9840 It has already been arranged that all blue prints issued for any experimental work whatsoever should bear no information as regards… | ||
| scan0012 | Recommendation regarding the fitting of E.A.C. bodies onto a standard 40/50 chassis and an experimental chassis. | ||
| View original record | Da/EV. from Hs. CONFIDENTIAL. y9840 Hs4/LG21.2.23. E. A. C. BODIES. We recommend that all bodies for the E.A.C. should be prepared and fitted on to standard long type 40/50 chassis with modified… | ||
| scan0013 | Secret memorandum regarding modifications for Experimental chassis 5.EX for the 'E.A.C.' project. | ||
| View original record | X.4195. X9840 To Hs. from Da/Ev. S E C R E T Da/Ev3/M23.2.23. "E. A. C" BODIES. X.4195. Thank you for your Hs4/LG21.2.23., and the recommendation contained therein. The suggestion is that our drawing… | ||
| scan0014 | Secret memo regarding the preparation of bodies for the E.A.C. engine project. | ||
| View original record | X.9840 To R. from Hs. c. to CJ. Da. E. A. C., SECRET Hs2/LG11.9.23. BODIES FOR E.A.C. X.9840 We anticipate having an E.A.C. engine running on the bed in about 10 days time. Although we expect it will… | ||
| scan0015 | Construction of a disguised armoured body for the E.A.C. chassis to resemble a fully loaded car. | ||
| View original record | X.9840 To Wor. from CJ. Copy to R. Copy to Hs. E.A.C. CJ3/E13/9/23 I do not like the idea of having bodies built for the E.A.C. car. The body builders, most of whom are purchasers of Rolls-Royce… | ||
| scan0016 | Requesting two 40/50 HP long type chassis for experimental front wheel brake tests. | ||
| View original record | X9540 CONFIDENTIAL B.J. from Hs. c. to C. c. to Wor. Hs4/LG28.9.23. 40/50 CHASSIS. FRONT WHEEL BRAKES. Handwritten: X4428 (crossed out), X2929 (crossed out), X9840, X3408 In order to carry out… | ||
| scan0017 | Production sequence of fitting bodies and front wheel brakes. | ||
| 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… | ||
| scan0018 | Confidential memo regarding arrangements for two dummy armoured car bodies for E.A.C. testing. | ||
| View original record | X9840 CONFIDENTIAL. To Hs. from BJ. BJ11/H3.10.23. E. A. C. We thought it was agreed that only dummy armoured car bodies should be used in testing anything connected with E.A.C. Do you suggest that we… | ||
| scan0019 | Confidential memo discussing the procurement of bodies for 10,000-mile tests on 20 HP and 40/50 HP production chassis. | ||
| View original record | To Hs. from BJ. BJ1/H4.10.23. X9840 PRIVATE AND CONFIDENTIAL. c. to Wor. BODIES FOR 10,000 MILES PRODUCTION CHASSIS. X.3730 X.4801 X.9840 X.4594 With regard to bodies for 10,000 miles tests :- 20 HP.… | ||
| scan0020 | Secret memo discussing the design and sourcing of parts for an armoured car body. | ||
| View original record | BJ. from Hs. S E C R E T. x 9840 Hs5/LG4.10.23. E. A. C. x 9840 x 9940 Referring to your BJ11/H3.10.23. I have consulted Wor. and BY. with reference to Armoured Car Bodies in connection with the… | ||
| scan0021 | Query regarding the potential to cover or obscure the front wheel brakes on an armoured car body. | ||
| 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… | ||
| scan0022 | Secret memo outlining modifications and a test plan for the experimental E.A.C-3 chassis, focusing on the implementation of 4-wheel brakes. | ||
| View original record | To BJ. from Hs. c. to WOR. SECRET X9840 Hs2/LG5.10.23. E. A. C. 3 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… | ||
| scan0023 | Logistics and requirements for experimental tests on six chassis, including timing, front wheel brakes, and body types. | ||
| View original record | contd:- The remaining 2 chassis will be retained at Derby for investigation and experimental tests and for trying out alternative schemes of improvements. We consider six is the minimum number of cars… | ||
| scan0024 | Secret memo regarding the requirement for 6 car bodies for experimental E.A.C-3 chassis to be used as Trials Cars. | ||
| View original record | W/S C. from Hs. S E C R E T. E. A. C. X 9840 X9840 Hs3/LG6.10.23. It would appear now, that we shall be requiring bodies for E.A.C. chassis. We have recommended that 6 Expl: E.A.C-3 cars are built. If… | ||
| scan0025 | Proposing a trip to London to test a 4-G-11 car and arrange coachwork for E.A.C. C-3 chassis. | ||
| View original record | X9840 BJ. from Hs. S E C R E T. Hs5/LG8.10.23 c. to C. BODIES FOR E.A.C-3 CHASSIS. X9840 We propose coming to London tomorrow. Primarily, we wish to try 4-G-11 car on PN's Test Route. We should also… | ||
| scan0026 | Despatching chassis to Barkers coachbuilders and specifying body types for testing. | ||
| View original record | W/S. S E C R E T. X9840 C. from Hs. E. A. C. X9940 X9840 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 other… | ||
| scan0027 | Despatching chassis 35-PK and 93-NK for the fitting of heavy test bodies. | ||
| View original record | W/S C. from Hs. S E C R E T. Hs4/LG11.10.23. X9840 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… | ||
| scan0028 | Sourcing of eight test bodies from various coachbuilders and the availability of others. | ||
| View original record | S/W Hs. X9840 C16/C13.10.23. Re Test Bodies. X9840 Of the 8 test bodies you want for the series test, we have been able to get a Pullman from Barkers, 2 Open Touring from Barkers, an Open Touring from… | ||
| scan0029 | Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on chassis 9.PK. | ||
| View original record | X9 840 O.O. from Hs. Hsll/LG22.2.24. CHASSIS 9.PK. Will you please instruct Messrs. Sanderson & Holmes Ltd. to carry out work in connection with the above car as per attached estimate. Hs. | ||
| scan0030 | 10,000-mile vehicle test conducted in France. | ||
| View original record | R.R. 438a (20H) (D.A. 652 20-3-24) J.H.D. EXPERIMENTAL REPORT. 49840 Expl. No. 9941 REF: Hs1/LG22.5.24. 9840 To R. from Hs. c. to CJ. RG. c. to LHS. DA. c. to E. C. S E C R E T. 10,000 MILES TEST IN… | ||
| scan0031 | List of complaints and suggested improvements following a 10,000 miles road test in France. | ||
| View original record | 98-NK. 10,000 MILES TEST IN FRANCE. COMPLAINT. SUGGESTED IMPROVEMENT. The two long brass bolts securing the battery box, sheared, and the four screws also retaining this item fell out, allowing the… | ||
| scan0032 | Complaint about the hood mechanism, with a section for suggested improvements. | ||
| View original record | -2- COMPLAINT. the hood could be lifted from them. The pins retaining these pegs also sheared and had to be replaced. The two sockets in the hood also came loose owing to the severe treatment they… | ||
| scan0033 | 1000-mile test cars, suggesting coachbuilder involvement to identify weaknesses in body construction and proposing wing stay design improvements. | ||
| View original record | X.9840 To HS. from DA/EV. S E C R E T. DA/EV1/M24. 5. 24. c. to R. LHS. E. A. C. RE. 1000 MILE TEST CARS. X.9840. Referring to your Hs1/LG22.5.24., re. the body on the EAC.3. 1000 milestest chassis,… | ||
| scan0034 | Condition of test car 98-NK and a proposal for its repair by Messrs. Barkers. | ||
| View original record | X9840 (handwritten) To DA/EV. from Hs. Hs7/LG27.5.24. RE. 10,000 MILES TEST CARS. X9840 (handwritten, crossed out) X9941 (handwritten) One of the cars we are sending back to France will be 98-NK. This… | ||
| scan0035 | Bodywork failures on 10,000-mile test car 98-NK, related to mounting by coachbuilders Messrs. Barkers. | ||
| View original record | To HS. from DA/EV. H9840 DA/EV2/M4.6.24. RE. 10,000 MILES TEST CARS. X.9941 X.9840 With reference to test car 98-NK, on which you have reported in your Hs1/LG25.5.24., we have considered this matter… | ||
| scan0036 | Failures on a Barker body fitted to a 10,000-mile test car and arranging for them to view the repairs. | ||
| View original record | To DA/EV. from Hs. 49840 Hs10/LG5.6.24. RE. 10,000 MILES TEST CARS. X9840 The body which ran on 98-NK. was a Barker body and was fitted up by Messrs. Barkers. The wings and all the attachments were… | ||
| scan0037 | Arranging new lead-coloured wings and bodywork for a Barker Torpedo, chassis 98-NK. | ||
| View original record | X. 9840 To HS. from DA/EV. DA/EV1/M6.6.24. RE. BARKER TORPEDO - CHASSIS 98-NK (LK.) We have heard from Messrs. Parkers to the effect that as this is a special case they can provide a set of new wings… | ||
| scan0038 | Confidential memo concerning a faulty Barker Open Touring body on an experimental chassis and arranging for an inspection. | ||
| View original record | S/W Hs. Confidential. Re 98-NK. X9840 C26/C13.6.24. With reference to our conversation concerning the Barker Open Touring body which you used on the Experimental chassis and which did not stand up… | ||
| scan0039 | Enquiring if Barkers examined car 98-NK before it went away. | ||
| View original record | x9840 Expl: Dept: Messrs. Rolls-Royce Ltd., Derby. Angleterre. 28th. June 1924. Mr. Lidsey, Hotel de France, Chateauroux, Indre, France. AJL. from Hs. With reference to the attached memo. ref.… | ||
| scan0040 | Authorizing work on car 9-PK by Messrs. Sanderson & Holmes. | ||
| View original record | X9840 To O.O. from Hs. Hs10/LG24. 7. 24. 9-PK CAR. Will you please instruct Messrs. Sanderson & Holmes to carry out work in connection with the xxxxxxxx above car as per attached estimate. £10. 13. 6.… | ||
| scan0041 | Two designs for an open Sports Touring Car, a boat body and a phaeton, requested by Mr. Hives. | ||
| View original record | To BY. from DA/EV. c. to CJ. HS. Y9840 DA/EV1/M7. 8. 24. X.9840 X.3730 X.3729. We send herewith N.schs. 1826 and 1829., shewing two designs of an open Sports Touring Car, the former being a boat body… | ||
| scan0042 | Secret memorandum discussing the design and sourcing of bodies for experimental cars. | ||
| View original record | 49820 To RG. HS. } FROM R. c. to CJ. BJ. DA. E. BY. EP. SECRET: R3/M29.8.24. RE. VISIT OF RG. & HS. TO WW. 27th. & 28th.inst. X.9840 [Text is struck through] X.8830 X.3730 X.3729 BODIES FOR… | ||
| scan0043 | Secret memo discussing options for obtaining bodies for the experimental EAC.2 chassis from coachbuilders. | ||
| View original record | +9840 To HS. from DA/EV. c. to BY. C. S E C R E T. DA/EV1/ME. 9.24. RE. SECRECY OF EAC. BODIES. X.9840 X.8830 We have considered ways and means of obtaining bodies for the experimental EAC.2. chassis… | ||
| scan0044 | Different suggestions for vehicle body manufacturing and finishing, concluding with an arrangement to use Barkers. | ||
| View original record | contd :- -2- When completed, this whole unit would be crated and sent to Derby. Apart from the difficulty and expense one is inclined to fear that such a procedure would cause a certain amount of… | ||
| scan0045 | Alteration of a Hooper open touring body on an experimental car. | ||
| View original record | W/S. C. from Hs. X9890 Hs5/LG16.9.24. BODIES FOR EXPERIMENTAL CARS. X3729 X9890 With reference to R3/M29.8.24. The body which R. refers to is the one fitted to 46-PK car. It is a Hooper open touring… | ||
| scan0046 | Secret memo requesting two up-to-date E.A.C. engine cars with different body types for testing. | ||
| View original record | To Hs. from BJ. X98260 SECRET. BJS/H17.9.24. Copy to Wor. E.A.C. ENGINE. X9770 X98260 With reference to R4/M29.824, when could you let us have at Gerrards Cross two of the most up to date E.A.C. cars,… | ||
| scan0047 | Secret memo discussing the availability of up-to-date EAC cars for Sales trials. | ||
| View original record | To BJ. from Hs. c. to R. c. to Wor. [Handwritten]: X9840 S E C R E T. Hs1/LG18.9.24. E. A. C. ENGINE. [Handwritten]: X9770 [crossed out] X9840 [crossed out] With reference to BJB/H17.9.24. We have no… | ||
| scan0048 | Windscreen failures experienced during a 10,000-mile test in France. | ||
| 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. BJ. c. to LHS. c. to DA/EV. Expl. No. X9840 REF: Hs3/LG23.9.24. WIND-SCREEN. X1087 X9840 X9941 When we were… | ||
| scan0049 | Modification to a windscreen panel on vehicle 9-PK to prevent glass distortion. | ||
| View original record | Contd :- -2- (4) The bottom panel on 9-PK is very wide and high, and the glass being rather thin it is possible to distort the glass quite considerably by applying pressure to it in the middle. This… | ||
| scan0050 | Secret memorandum discussing body specifications for a 40/50 chassis, including steering options, wings, and the potential use of an American body. | ||
| View original record | To HS. c. to C. } FROM DA/EV. S E C R E T. DA/EV2/M13.10.24. E. A. C. X.8830 CLOSED BODY. X.3729 X.9840 EV. will bring with him on Thursday a sketch and specification of a closed body for the above… | ||
| scan0051 | Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on a chassis as per an attached estimate. | ||
| View original record | O.O. from Hs. K9840 Hs3/LG24.10.24. 44-PK CAR. Please instruct Messrs. Sanderson & Holmes Ltd. to carry out work in connection with the above chassis as per attaches estimate. Hs. | ||
| scan0052 | Dispatch of a Dummy 40/50 HP chassis with a special Open Touring Body. | ||
| View original record | S/W. (Hs). X9840 C/Hn6/MH20.3.25. Lillie Hall have to-day sent you the Dummy 40/50 h.p. chassis mounted with a special Open Touring Body by Barker's. You will recollect that the design of this body… | ||
| scan0053 | From Hs. to DA/EV regarding the delay of car 9-PK due to urgent work on the 'V' series. | ||
| View original record | To DA/EV. from Hs. X 98240 Hs1/LG23.3.25. 9-PK CAR. With reference to this car. We anticipate this will be ready in a week or 10 days. We have made all the special parts for the springs. It is only a… | ||
| scan0054 | Delay with chassis 9.P.K. and a suggestion for a workaround. | ||
| View original record | To H.S. from Ev. Y9840 Ev11/25-3-25 Re 9.P.K. Chassis We regret that we cannot have this chassis for another week or 10 days, as both Barkers & Hoopers are ready for it now, & we are held up. We fully… | ||
| scan0055 | Delivery of the 9-PK car and a warning against its use as a demonstrator. | ||
| View original record | To DA/EV. from Hs. x9840 Hs2/LGS.6.25. 9-PK CAR. x9770 We should like to know when we are likely to receive 9-PK car so that we can remove the body, wings etc. We are anxious that the car shall not be… | ||
| scan0056 | Need to swap a car body for a chassis test and ordering a new cabriolet body for a 20 HP car. | ||
| View original record | To DA/EV. from Hs. X9840 Hs1/LG11.6.25. BODIES FOR SUBFRAME. At the moment we are preparing an EAC. chassis to take the body which is at present fitted to 9-PK. When this is completed it will run… | ||
| scan0057 | Return of a dummy 40/50 car chassis to Messrs. Barkers. | ||
| View original record | X9840 To BP. from Hs. HsS/LG15.6.25. RE. DUMMY 40/50 CAR. X9770 Sales wish us to return the dummy 40/50 chassis fitted with a sports body, which we received from them sometime ago. as this dummy… | ||
| scan0058 | Sending a dummy car with a sports body back to coachbuilder Messrs. Barkers. | ||
| View original record | W/S. To C/Hn. from Hs. X9840 Hs2/LG15.6.25. RE. DUMMY SPORTS CAR. X9720 X9840 We are arranging to send the dummy car fitted with a sports body back to Messrs. Barkers, Shepherds Bush immediately. It… | ||
| scan0059 | Instruction memo to Messrs. Sanderson & Holmes Ltd. to carry out work on car 9-PK as per an attached estimate. | ||
| View original record | To O.O. from Hs. X9840 9-PK CAR. Hs6/LG22.6.25. Please instruct Messrs. Sanderson & Holmes Ltd. to carry out work in connection with the above car as per attached estimate. Hs. £11. 0. 0d. | ||
| scan0060 | Body options and alterations for chassis EAC.1, specifically concerning dash width. | ||
| View original record | R.R. 493A (50 H) (D.D. 31. 12-6-25) J.H.D. EXPERIMENTAL REPORT. Expl. No. X9840 1 REF: Hs3/LG30.11.25. to DA/EV. from Hs. BODY FOR EAC.1. X9840 We recommend that we use the Hooper enclosed limousine,… | ||
| scan0061 | Secret memorandum concerning the mounting of a subframe body for a New Phantom chassis onto an E.A.C.I. body. | ||
| View original record | to HS. from EV. Copied by RS to-morrow Hs X9840 EV.I/30.11.25. SECRET E.A.C.I. BODY. We send herewith N.SCH. 2081. shewing, as far as we can, how a subframe body, made for a New Phantom chassis, can… | ||
| scan0062 | Letter to Barker & Co Ltd regarding the completion of cabriolet body No. L.6414 on a subframe without a chassis. | ||
| View original record | Body for EACI X9840 HS. "CAMACHA". WEST WITTERING. NR. CHICHESTER. SUSSEX. EV.1. December 5th. 1925. Messrs Barker & Co Ltd. Olaf. Street. Latimer Road. Notting Hill. W. 11. RE CABRIOLET DE VILLE. No.… | ||
| scan0063 | Instruction memo for Messrs. Sanderson & Holmes Ltd. to perform work on a car based on an attached estimate. | ||
| View original record | X9840 To O.O. from Hs. Hs2/LG25.1.26. EAC.1. Please instruct Messrs. Sanderson & Holmes Ltd. to carry out work in connection with the above car as per attached estimate. Hs. 14s. 0d. | ||
| scan0064 | Inquiring about the delivery of experimental open touring and cabriolet bodies for chassis EAC Vlll and EAC.1. | ||
| View original record | To DA/EV. from Hs. X9840 Hs4/LG3.3.26. EXPERIMENTAL BODIES. X7830 We should like to know when we shall receive the open touring body for EAC Vlll. and the cabriolet body for EAC.1. chassis. We have… | ||
| scan0065 | Status of two experimental bodies, a torpedo and a cabriolet, from the coachbuilder Barkers. | ||
| View original record | To Hs. from DA/EV. c. to R. C. X9840 DA/EV1/M4.3.26. RE. EXPERIMENTAL BODIES. X.7830 X.9840 I visited Barkers yesterday and saw the torpedo for the EAC. 8. chassis which is now complete in every… | ||
| scan0066 | Instruction memo to Messrs. Sanderson & Holmes Ltd. to carry out work on car 9-EX per an attached estimate. | ||
| View original record | To O.O. from Hs. X9840 Hs4/LG9. 8. 26. 9-EX CAR. Please instruct Messrs. Sanderson & Holmes Ltd. to carry out work in connection with the above car as per attached estimate. Hs. £83. 4. 6d. | ||
| scan0067 | Instruction memo to carry out work on car 9-EX as per an attached estimate. | ||
| View original record | To O.O. from Hs. X.9840 Hs1/LG20.9.26. 9-EX CAR. Please instruct Messrs. Sanderson & Holmes Ltd. to carry out work in connection with the above car as per attached estimate. Hs. £2. 1. 6d. | ||
| scan0068 | Attempt to test drive a Hispano car and the proposal to buy a second-hand one for testing. | ||
| View original record | To Hs. from Da. x9910 Dal/M29.10.23. Mr. Hardy and I went to look at the Hispano car at Barkers last week, but we were not able to try it as it was not in a runnable condition. Mr. Royce wanted us to,… | ||
| scan0069 | Method of operating 4-wheel brakes suggested by Mr. Lovesey. | ||
| View original record | R.R. 493A (40 H) (BL 42 12-7-23). J.H., D. x9910 9940 Expl. No. 1669 REF: HES/107.12.23. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. c. to Da. c. to Rg. 4-WHEEL BRAKES. Herewith description of a… | ||
| scan0070 | Tests conducted on Ferodo lined wrapping brake shoes. | ||
| View original record | R.R. 403 (40 H) (SL 42 12-7-23). J.H., D. X1559 EXPERIMENTAL REPORT. COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. 3409 X1559 REF H's/RB1/8.12.23. OBJECT OF TEST. Test on Ferodo lined… | ||
| scan0071 | Test report comparing the performance of different brake shoe designs and their braking power. | ||
| View original record | Type of shoe. | DESCRIPTION. | SKETCH. | Initial drum r.p.m. | Final drum r.p.m. | W. | REMARKS. 2A. | Standard. | Standard. | 473 | 315 | 15 | This test made for the sake of comparison with those… | ||
| scan0072 | The performance and wear of a 'Shoe X' brake component. | ||
| View original record | R.B. 493A (40 H) (SL 42 12-7-23). J.H., D. Sheet 3. EXPERIMENTAL REPORT. Expl. No. 3409 REF: Hs/RB1/LG8.12.23. Shoe X. Ferodo at toggle end only. On applying the brake in this case it was noticed that… | ||
| scan0073 | The E.A.C.111 servo, detailing pressure distribution to the brakes. | ||
| View original record | E.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. X9910 REF: Hs/AHL1/L01018.23 To R. from Hs/AGL. c. to CJ. c. to RG. c. to Ds. c. to BY. E.A.C.111. SERVO. F = Pressure applied… | ||
| scan0074 | Unexpected multiplication in a servo system and the coefficient of friction. | ||
| View original record | To HS. from DA. S E C R E T. X9910 DAL/M13.12.23. E.A.C.111. SERVO. X-3340 X.3409 Referring to your HS/AJL1/LG10.12.23., we are surprised at the multiplication you obtain which is about 2 1/2 times as… | ||
| scan0075 | Modifications to the car's braking system and servo to achieve more equal braking. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. /9910 Expl. No. 1559 9940 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 servo… | ||
| scan0076 | Scheme for reducing servo power and investigating brake jaggers. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H.D. -2- EXPERIMENTAL REPORT. Expl. No. 9940 REF: HS4/LG11.1.24. This week we have received from DA. a scheme for reducing the power of the servo by increasing the… | ||
| scan0077 | Modifications to prevent brake judder, or 'jaggers', and the affect on steering. | ||
| View original record | B.R. 493A (40 H) (SL 42 12-7-23). J.H., D. -3- EXPERIMENTAL REPORT. Expl. No. 9940 REF:ns4/LGl1.1.24. brake pedal to prevent the sudden application. The following experiments have been tried and the… | ||
| scan0078 | Front brake effectiveness, steering faults, and brake rig testing. | ||
| 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 at… | ||
| scan0079 | Issues with steering pivot pins, brake dust covers, and future testing plans for springs and servo leverage. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H. D. -5- Expl. No. 9940 REF: HS4/LG11.1.24. EXPERIMENTAL REPORT. This is a point which we are investigating. CONSTRUCTION. We find difficulty in preventing the… | ||
| scan0080 | Diagram showing the arrangement and mechanics of Hispano four-wheel brakes. | ||
| View original record | ARRANGEMENT OF HISPANO FOUR WHEEL BRAKES REAR BRAKE 2.67 2.73 REAR BRAKE. 3.525 DISTRIBUTING SHAFT. NO COMPENSATING GEAR BETWEEN FRONT & REAR BRAKES. COMPENSATING GEAR BETWEEN NEAR & OFF SIDE FRONT… | ||
| scan0081 | Schematic diagram showing the standard and modified arrangements for a 40-50hp four-wheel braking system. | ||
| View original record | 40-50 FOUR WHEEL BRAKES . STANDARD ARRANGEMENT. (SHEET 1) '4 CAM RAD. 4.5 2.8 3.3 3.25 3.15 6.187 P 14.75 DIFFERENTIAL DISTRIBUTER { 5/7 TORQUE TO FRONT { 2/7 " TO SERVO. A 2.75 2.5 B 2.275 C 3.05 IN… | ||
| scan0082 | Hand-drawn diagrams and calculations for rear brake pressure on the STD 40-50 RR and Goshawk models. | ||
| View original record | PRESS. ON REAR BRAKES OF STD 40-50 RR. P 14.75 6.18 1.4 1.9 2.0 2.5 7" 1.5 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.… | ||
| scan0083 | Servo brake testing, including tests on re-lined shoes and different liner materials. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. ORIGINAL Y9910 COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. 9910 REF. Hsl/LG22.1.24. OBJECT OF TEST. To obtain data on… | ||
| scan0084 | Series of tests on an E.A.C. servo on a brake testing rig. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. Expl. No. 49910 / 8345 REF: Hs/Rm/LG22.1.24. EXPERIMENTAL REPORT. E.A.C. SERVO TESTS. We have carried out a series of tests with the EAC. servo on our brake… | ||
| scan0085 | Series of tests demonstrating the effects of speed and heat on the wearing capacity of brake linings. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-28). J.H., D. -2- Expl. No. 9910 REF:Hs/Rm/LG22.1.24. EXPERIMENTAL REPORT. We therefore carried out a second series of tests to demonstrate the magnitude of these effects.… | ||
| scan0086 | Comparing the horsepower absorbed by rear wheel foot brake shoes versus the servo. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9910 REF Hs/Rm/LG22 1 24. TO COMPARE THE H.P. ABSORBED BY THE 40/50 REAR WHEEL FOOT BRAKE SHOES PER SQ.IN. OF LINING WITH THE… | ||
| scan0087 | Report attributing excessive servo wear to a lack of cooling facilities for the roasted brake linings. | ||
| View original record | contd:- -2- From these figures it is apparent that were the servo operating under the same conditions as the rear brakes, it should wear no more rapidly. Our tests on the brake rig have shewn,… | ||
| scan0088 | Diagram and performance graphs for an E.A.C. Servo showing mechanical gain variation with temperature, speed, and load. | ||
| View original record | E.A.C. SERVO Diagram: TANGENTIAL PULL P MECH. GAIN P/W LOAD W Graph A: Title: VARIATION IN MECH GAIN WITH TEMPERATURE Y-Axis: MECHANICAL GAIN (0, 10, 20, 30) X-Axis: TIME RUN. MINS. (0, 1/2, 1, 1 1/2,… | ||
| scan0089 | Test report on the effect of high temperatures on the wear and mechanical gain factor of a servo system. | ||
| View original record | EFFECT OF HIGH TEMPERATURES ON WEAR AND MECHANICAL GAIN FACTOR OF SERVO LOAD ON SERVO W = 10 1/2 LBS OR 100LBS PEDAL PRESSURE IN ALL TESTS. TABLE 1: CONDITIONS OF TEST: SERVO DRUM REVS 500 RPM DRUM… | ||
| scan0090 | Sending two sets of servo brake liners from tested cars for examination. | ||
| View original record | To DA. from Hs. c. to R. CJ. X9940 HS2/LG23.1.24. SERVO BRAKES. X.9940. X.3409. We are sending to you 2 sets of liners removed from the servo brakes on cars which we have been testing. One set is off… | ||
| scan0091 | Servo brake data, comparing cast iron liners with Ferodo linings. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. X9940 COPIES TO: (RCJ) (BJ) (WOR) By. E. Da. EP. PN. OY. (RG) Expl. No. 3409 9940 REF. Hs5/LG23.1.24 OBJECT OF TEST. To obtain data on… | ||
| scan0092 | Testing E.A.C. servo brake shoes with cast iron lining. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs/Rm/1.C24.1.24. E.A.C. SERVO. We have tested servo brake shoes lined with cast iron on our testing rig. The… | ||
| scan0093 | Comparison of performance and wear characteristics for E.A.C. Servo cast iron and Ferodo liners. | ||
| View original record | E.A.C. SERVO CAST IRON LINERS Left Graph: SERVO MECH GAIN VARIATION IN MECH GAIN OF SERVO WITH SPEED DRUM COOLED EQUIVALENT PEDAL PRESSURE 100LBS DRUM R.P.M Right Graph: SERVO MECH GAIN VARIATION IN… | ||
| scan0094 | Telegram requesting an experimental modification to the brake servo system. | ||
| View original record | A: 66: 11.41 CHICHESTER T: 62 = HIVES ROYCAR DERBY: = R WISHES TO INCREASE LEVERAGE BETWEEN SERVO AND BACK BRAKES EXPERIMENTALLY WILL YOU DO THIS BY REDUCING LENGTH OF LEVER ON SERVO CROSS SHAFT FROM… | ||
| scan0095 | Test rig findings for the E.A.C. Servo, focusing on Ferodo liner performance. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9846 3409 REF: Hs/Sml/KG26.1.24. To R. from Hs/Rm. c. to CJ. RG. c. to DA. E. c. to BY. WOR. S E C R E T. E.A.C. SERVO. We… | ||
| scan0096 | Brake performance comparing modified and standard leverages. | ||
| View original record | R.R. 493A (40 H) (EL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9910 REF Hs/Rm1/L626.1.24. 17 lbs.ft. at 500 drum r.p.m. without over-heating. LATEST MODIFIED LEVERAGE. (Instructions… | ||
| scan0097 | Secret memo discussing modifications to the brake servo leverage system. | ||
| View original record | X9910 To HS. from DA. SECRET. DA1/M26.1.24. RE. EAC.111. BRAKE WEAR ON SERVO ETC. X.9910 You will receive by the same post a note from R. suggesting reducing the leverage between the servo and rear… | ||
| scan0098 | Continued discussion regarding a suggestion for a quick adjustment between the servo and back brakes. | ||
| View original record | contd:- -2- part of this suggestion. The suggestion involves we think a quick adjustment between the servo and the back brakes which may or may not be found essential in practice. For your information… | ||
| scan0099 | Confirmation of a telegram regarding testing copper liners on a servo brake system. | ||
| View original record | X9910 To Hs. from CJ. CJ7/E28/1/24 The following is confirmation of telephone message to you to-day:- Telegram dated 28th. 9.30 from R:- TEST ALSO COPPER LINERS ON SERVO WITH SAME MOVEMENT OF REAR… | ||
| scan0100 | Brake testing of a 40/50 HP car, focusing on a servo with cast iron liners and its noise issues. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. x9910 Expl. No. 9910 1559 REF: Hs6/LC30.1.24. x4214 EXPERIMENTAL REPORT. SECRET. BRAKES. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. We have run… | ||
| scan0101 | Calculations comparing the unit pressure on RR servo shoes with the Hispano servo. | ||
| View original record | contd:- -2- Calculations show that the unit pressure on the RR. servo shoes is approximately 1/5 times the unit pressure on the Hispano servo. Hs. | ||
| scan0102 | Comparing Rolls-Royce and Hispano cars. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. X 9910 EXPERIMENTAL REPORT. COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. 4214 REF. Hs2/LGS.2.24. OBJECT OF TEST. Comparison of RR. and Hispano… | ||
| scan0103 | The hill climbing performance of a 40/50 HP Landaulette in North Devon. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF: HS/RH/LGS.8.24. HILL CLIMBING PERFORMANCE - NORTH DEVON. The following hills were climbed by a 40/50 HP. Landaulette,… | ||
| scan0104 | Braking tests conducted in North Devon on Porlock and Countisbury hills. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF: Hs/Bm/LCE. 9. 24. BRAKING TESTS - NORTH DEVON. Porlock hill - Length 2 1/4 miles. average grade 1 in 9 1/4. steepest 1 in… | ||
| scan0105 | Comparison of chassis specifications and hill climbing performance between a 40/50 HP model and a Hispano Suiza in North Devon. | ||
| View original record | HILL CLIMBING TESTS - NORTH DEVON. 40/50 HP. AND HISPANO SUIZA. Chassis specification. DETAIL | 40/50 HP. | HISPANO SUIZA. --- | --- | --- Turning circles. | R.H. 58 1/2 ft. L.H. 59 ft. | R.H. 49 ft.… | ||
| scan0106 | Comparison test report of the R.A.C. High Speed Servo and the Hispano-Suiza braking systems. | ||
| View original record | BRAKE TESTS - NORTH DEVON+ R.A.C. HIGH SPEED SERVO AND HISPANO SYSTEM COMPARED. Gradients up to 1 in 4 measured with gradiometer. Steeper - local intelligence obtained. OBSERVATION. | R.A.C. (Cast… | ||
| scan0107 | Slow speed servo brake system for a 40/50 car. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23) J.H., D. EXPERIMENTAL REPORT. Expl. No. 9910 REF: Hs1s/LG7.2.24. To R. from Hs. c. to CJ. RG. c. to DA. BY. c. to E. WOR. S E C R E T. BRAKES. We have been running… | ||
| scan0108 | Secret brakes, detailing modifications to the low speed servo and comparing pedal pressure to the Hispano. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. X9910 Expl. No. 9910 4214 REF: Hs3/LG11.2.24. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. RG. c. to E. DA. c. to BY. WOR. S E C R E T. BRAKES. We have had… | ||
| scan0109 | Implementation of a slow-speed servo for brakes, including servo drive and pull considerations. | ||
| View original record | To RG. E. DA. } FROM R. HS. SECRET. R1/M11.2.24. E. A. C. BRAKES. X.4214 I have not written much on the various brakes under discussion because I am expecting that we shall deliver nothing but slow… | ||
| scan0110 | Brake system design, comparing a proposed system using a floating lever with that of Hispano-Suiza. | ||
| View original record | contd:- -2- one and I was in hopes we could make this a lighter pull with longer stroke, as could be arranged with the floating lever I suggested. We should note it was discussed with this scheme… | ||
| scan0111 | Typed letter discussing car braking performance on a gradient and personal notes regarding a journey. | ||
| View original record | contd:- -3- reliable for the reason given below and I should like to see us be able to hold the car by the foot on a 1 in 5 gradient. P.N. I was pleased to hear that PN. had some 4-wheel brakes but I… | ||
| scan0112 | Secret memo providing feedback and suggestions on a drawing of a servo for an EAC.4 gearbox. | ||
| View original record | To Mr. Stent RG. E. DA. } FROM R. copy to CJ. BY. HS. SECRET. X9910 R3/M15.2.24. SERVO FOR EAC. X.9770 1, 2, 3, 4 & 5. Re. LeC.1827. - Mr. Stent's drawing of the servo applied to EAC.4. gearbox. (1) I… | ||
| scan0113 | Continued list of design suggestions regarding component weight, material choice, and alignment. | ||
| View original record | contd. -2- through to drive the speed indicator in the newer cars? (8) There is a lever called 'B' - i.e. pull rod from servo. This lever looks heavy towards the hub, and also the bushed end with bolt… | ||
| scan0114 | Copy of a telegram from Mr. Royce regarding a modified side servo braking scheme. | ||
| View original record | 49910 Rg1/W25. 2. 24 W.OF. } By. } Hs. } from Rg. Dr. } The following is a copy of telegram received to-day from Mr. Royce:- LAVANDOU. 25.2.24 ROWLEDGE BELIEVE MOVING RATCHET POSITION MAKES LITTLE… | ||
| scan0115 | New balancing scheme for the four-wheel brake servo system to reduce friction. | ||
| View original record | RHC. [crossed out] c. Hs. XG9910 Rg/SFP1/W26. 2. 24 FOUR WHEEL BRAKES. As there is a great amount of friction experienced in the balance gear as now fitted to the slow speed servo scheme of brakes, we… | ||
| scan0116 | Proposal for a new servo brake system designed to overcome objections evident in existing schemes. | ||
| View original record | x9210 Brakes R. BY1-P27.2.24. RE SERVO BRAKE SYSTEMS. At home the other evening as a matter of interest I set out to try and overcome certain objections which seemed to me to be evident in most servo… | ||
| scan0117 | Technical description of a servo-assisted cone clutch mechanism. | ||
| View original record | BY1-P27.2.24. contd. - 2 - The basic idea which makes the above possible is assuming an ordinary servo clutch mechanism, which for simplicity would be of the cone clutch variety, the member of the… | ||
| scan0118 | Detailed explanation of the interaction between the clutch and the servo braking mechanism. | ||
| View original record | BY1-P27.2.24. contd. - 3 - It should be noted that this movement carries the clutch away from the collar it would be held against normally when the servo shaft is rotating towards the collar limiting… | ||
| scan0119 | Technical discussion on the design and possibilities of a servo-assisted and foot-operated braking system. | ||
| View original record | BY1-P27.2.24. contd. - 4 - takes up the brake pull on the servo driven members cable; giving a brake all foot operated under the first conditions and a purely servo operated brake under the second… | ||
| scan0120 | Secret memo discussing the design and advantages of a semi-servo braking system with swivelling friction surfaces. | ||
| View original record | To DA. & ST. FROM R. c. to CJ. RG. c. to BY. HS. X9910 S E C R E T. SEMI-SERVO SYSTEM N.SCHS.1756 & 7 etc. SWIVELLING FRICTION SURFACES X9910 FOR SERVO. As before stated I fear alignment of the 2… | ||
| scan0121 | Secret memo outlining the required properties for a reliable friction material for a servo system. | ||
| View original record | X.9910 S E C R E T. To Hs. DA. from R. c. to CJ. RG. E. BY. RE. FRICTION MATERIALS FOR SERVO. X.9910. This requires a material whose chief advantage is consistency under all conditions, which means… | ||
| scan0122 | Technical memorandum discussing the design, fitting, and oil retention for a servo shaft. | ||
| View original record | To DA. from R. c. to E. RG. HS. BY. S E C R E T. R1/M19.3.24. E. A. C. X.9910 X.9770 RE. B.Sch.1767 - Your date 11.3.24. SERVO SHAFT. I prefer the lower scheme as a cleaner simpler and less costly… | ||
| scan0123 | Technical memorandum discussing the design of a servo mechanism, comparing swivel plates to a double cone scheme. | ||
| View original record | URGENT AND IMPORTANT. X.9910 To DA. E. ST. ) FROM R. c. to CJ. RG. BY. HS. PN. S E C R E T. RL/M25.3.24. E.A.C. - N.SCH.1769 - Lec.1846. X.9910. SERVO. For the experimental ones in hand we shall not… | ||
| scan0124 | Design and mechanics of a vehicle's braking system, including leverage, servo, and pedal movement. | ||
| View original record | -2- or the same lever could be hung up further forward, and the servo arm reduced, or both if necessary. So that in RRM. and -- other this should be promptly done. The foot pedal used to carry the… | ||
| scan0125 | Instructions for Mr. Hives and a report on a scheme requiring excessive foot pressure. | ||
| View original record | contd:- -3- Kindly promptly get suitable instructions to Mr. Hives that all the work is not wrong for such inexcusable reasons. The agreed scheme which was sent here required far too much foot… | ||
| scan0126 | Telegram requesting measurement of input and output torques for a servo scheme. | ||
| View original record | (22382) K.M.674 20,000M 11/22 R.&Co.Ltd. E1353. B or C 3. POST OFFICE TELEGRAPHS. X 9910 0133 Office Stamp: DERBY 29 SEP 26 Recd. from: OM By: W.D. Prefix: P Handed in at: 6 12 M Chichester Words: 19… | ||
| scan0127 | Confirmation of a telegram requesting the measurement of input and output torques of a servo. | ||
| View original record | X9910 CONFIRMATION OF TELEGRAM. WEST WITTERING. 26. 3. 24. HIVES. ROYCAR. DERBY. CAN YOU MEASURE INPUT AND OUTPUT TORQUES OF SERVO AGREED SCHEME WIRE RESULTS. DAY. | ||
| scan0128 | The average mechanical gain of an agreed servo system. | ||
| View original record | L9210 26/3/24 Day Camachea W W Average mechanical gain with agreed servo one point eight with one of this is direct pedal pressure, report sent today Hives | ||
| scan0129 | Tests of a W.W.111 type servo. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. +9910 EXPERIMENTAL REPORT. COPIES TO: R.C.J. B.J. WOR. By. E. Da. E.B. PN. OY. Ra Expl. No. 2940 REF. Hsl/LG26.3.24. OBJECT OF TEST. Tests on W.W.lll. type… | ||
| scan0130 | The performance of a slow-speed servo motor. | ||
| View original record | R.R. 493 A (40 H) (EL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. X9910 REF: Hs/ACL1/LG25.3.24 EAC.111. SLOW SPEED SERVO MOTOR W.W.3. The following tests were made on the servo fitted with… | ||
| scan0131 | Servo plate deflection, wear, and efficiency under load, including a table of mechanical advantage. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. X9910 REF:Hs/ACL/LG25.3.24. With a load equivalent to a pedal pressure of approx. 70 lbs. the outer servo plate showed signs… | ||
| scan0132 | Continuation of servo test results, detailing performance at various speeds and loads. | ||
| View original record | contd:- -3- A test was run at 2,000 r.p.m. but gave the same results as above. Also servo run for ½ hr. under 25 load at 1500 r.p.m. weight lifted remained constant at 10 lbs. throughout. Servo… | ||
| scan0133 | Secret memorandum discussing design changes for a servo, specifically regarding the external ratchet, swivel plates, and adjustment mechanism. | ||
| View original record | X.9910 X9910 To DA. E. ST. HS FROM R. c. to CJ. RG. BY. S E C R E T. R1/M27324 E. A. C. SERVO. X.9910. It will be understood that we do not now need the servo with external ratchet. We are not making… | ||
| scan0134 | Particulars of brake friction losses and potential improvements to gain mechanical advantage. | ||
| View original record | X9910 To DA. from Hs. Hsl/LG29.3.24. BRAKES. Attached are particulars you asked for with regard to friction losses with the WW. servo. We shall be making further tests with the plates located by pegs… | ||
| scan0135 | Friction losses in a slow speed plate servo. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Handwritten: 79910 Expl. No. 9910 REF: Hs/ACL/29.3.24. FRICTION LOSSES IN WW. SLOW SPEED PLATE SERVO. Tests were made on this servo to… | ||
| scan0136 | The performance of a WW. Agreed Type Servo with varying angle threads. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 1559 REF: HSs/LG4.4.24. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. SECRET. WW. AGREED TYPE SERVO. The original… | ||
| scan0137 | Slow-speed servo motor with a 55° thread, including performance data and a diagram. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF: Hs/ACL/3.4.24. W.W. SLOW SPEED SERVO MOTOR WITH 55° THREAD. The mechanical advantage of the servo was determined and the… | ||
| scan0138 | Graph showing the friction effect in a W.W. slow speed servo. | ||
| View original record | CURVES SHOWING FRICTION EFFECT IN W.W. SLOW SPEED SERVO. TORQUE OUTPUT lbs. INS. 2500. 2000 1500 1000 500 0 TORQUE INPUT. lbs INS. 0 200 400 600 800 TOTAL TORQUE OUTPUT. DECREASING LOAD INCREASING… | ||
| scan0139 | Technical memo discussing potential causes of lag and sticking in a servo mechanism, with suggestions for improvement. | ||
| View original record | To R. from DA. c. to HS. S E C R E T. 499/D DA2/M7.4.24. E.A.C. SERVO. X.1559 X.1013. Referring to Mr. Hives' report on the servo of the agreed scheme - HS5/LG4424 - we suggest that the slight lag in… | ||
| scan0140 | Comparing the leverages of the WW agreed servo scheme with the original slow speed servo. | ||
| View original record | DA. from HS. 49910 HS5/LG9.4.24. With reference to servo leverages. We have compared the leverages on the WW. agreed scheme servo with the original slow speed servo instructed by Rg. which gave us… | ||
| scan0141 | Critiquing a servo design, proposing modifications for simplification and improved performance. | ||
| View original record | To E. & ST. from R. c. to CJ. BJ. RG. DA. HS. SECRET 49910 R1/M1.4.24. EAC.2 & 3. X.9940 SERVO - LEC. 1861 Very disappointed with this design. It is extremely involved: wanted someone to clean up. Too… | ||
| scan0142 | Design memorandum discussing floating levers, connecting rod clearance, lubrication and servo action. | ||
| View original record | contd:- -2- There should be little weight on the floating levers so that lifting pins should be about the same angle and (if convenient rather further out than pins for connecting rods. (SEE ORIGINAL… | ||
| scan0143 | Losses in a flat disc type servo. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. X9910 Expl. No. 9940 (crossed out) 9771 REF. HS2/LG14.4.24. OBJECT OF TEST. Losses in… | ||
| scan0144 | Friction and other losses in a slow-speed servo, divided into three test sections. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 19910 9946 9771 REF Hs2/LG14.4.24. FRICTION AND OTHER LOSSES IN WW. SLOW SPEED SERVO. The tests were divided into three main… | ||
| scan0145 | Continuation of a document discussing torque loss and comparing plate pressure on the DES.38 and WW. servo designs. | ||
| View original record | contd:- -2- The difference between this and the actual torque obtained from two plates represents the torque lost to the dog friction resisting any increase in plate pressure. From this we can obtain… | ||
| scan0146 | Test results for a slow-speed servo motor's frictional losses and coefficient of friction. | ||
| View original record | TESTS WW. SLOW SPEED SERVO MOTOR FRICTIONAL LOSSES. Torque is expressed in lbs. ins. First Table: | Equt. pedal press: | Torque input. | One plate (no dogs) | | Two plates. (with dogs) | | Loss of… | ||
| scan0147 | Secret memo discussing design improvements and issues related to a servo mechanism, including its action, levers, rods, and pressure unit. | ||
| View original record | X9919 X.9940 To E. DA. & ST. FROM R. c. to CJ. RG. BY. HS. SECRET. R2/M14.4.24. EAC. 2 and 3. SERVO. X.9940 Further to my two former memos. I agree that the servo should have a stop to limit its… | ||
| scan0148 | Secret memo regarding tests on the WW. slow speed servo. | ||
| View original record | Y9910 To R. from Hs. c. to CJ. RG½ c. to DA. E. c. to BY. WOR. S E C R E T. Hs4/LG17.4.24. TESTS ON WW. SLOW SPEED SERVO. The tests attached were carried out on the servo similar to that which we are… | ||
| scan0149 | Tests conducted on an improved type of slow-speed servo. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9910 REF: Hs/ACL/LG17.4.24. TESTS ON WW. SLOW SPEED SERVO - IMPROVED TYPE. This servo has thicker plates than the previous one… | ||
| scan0150 | Test results and diagrams comparing standard and improved slow-speed servo types. | ||
| View original record | TESTS ON SLOW SPEED SERVO - STANDARD OR IMPROVED TYPE. First Table: | Eqvt. pedal pressure. | Torque put in to servo. | Torque output due to servo. | | Total torque output (servo T + T put in). | |… | ||
| scan0151 | Relaying a telegram about braking lag, servo production, and new test parts. | ||
| View original record | To DA. from Hs. c. to WOR. X9910 Hs1/LG23.4.24. We give below copy of telegram we have received at Derby from R. LAVANDOU - ROYCAR DERBY ANGLETERRE. "WITTERING REALISES MY ANXIETY ABOUT CLOSE BRAKING… | ||
| scan0152 | Servo single ratchet scheme for vehicle braking systems. | ||
| View original record | X.9910 To E. & DA. from R. c. to CJ. Wor. RG. HS. BY. S E C R E T, E. A. C. RL/M25.4.24. SERVO - SINGLE RATCHET SCHEME. X.9910. (1) Pleased you have realised by road experience my point of braking at… | ||
| scan0153 | Spring placement in a servo design to prevent jamming. | ||
| View original record | To E. DA. ST. FROM R. X.9910 (crossed out) X9910 S E C R E T. E2/M29.4.24. c. to RG. HS. BY. EAC. SERVO. X.9910 (crossed out) In the last servo design (18.4.24) I notice the three springs are far out.… | ||
| scan0154 | Servo design discussions and proposed improvements following a conference at Derby. | ||
| View original record | To RG. E. )from R. DA. Hs.) c. to CJ. Wor. By. X9910 SECRET R3/M1.5.24. RE CONFERENCE AT DERBY ON EAC#2 & 3. X9770 X9940 X9910 Mr. Day has told us that servo troubles might be due to the driving dogs… | ||
| scan0155 | Two alternative direct braking schemes for testing. | ||
| View original record | R3/M1.8.24. -2- Contd. (1) Direct foot to rear axle only - present 40/50 leverage. } (2) Direct foot to 4 wheels - half present 40/50 leverage. } This gives equal clearances. to see which scheme gives… | ||
| scan0156 | Necessity of grinding servo spur gears in the gearbox to reduce noise and vibration. | ||
| View original record | X 9910 Mr. Plath. [Struck through] c. Mr. [Struck through] c. Hs. BY18/H. 1. 5. 24. SERVO SPUR GEARS IN GEAR BOX. I wish to confirm that it is necessary that this pair of gears should be ground, as we… | ||
| scan0157 | Secret memorandum detailing modifications to the servo system, including drawings for altered servo plates and connecting rods. | ||
| View original record | To RG. HS. BY. FROM R. c. to CJ. SECRET R1/M3.5.24. [Handwritten above SECRET]: Y9910 (crossed out) E. A. C. [Handwritten above SERVO]: Y9910 SERVO. [Handwritten]: X.9940. We send you herewith… | ||
| scan0158 | Secret memo discussing a potential change in the brake servo design, from the RRM scheme to a direct foot pressure system for all four brakes. | ||
| View original record | X.9910 X9910 To RG. & HS. FROM R. S E C R E T. R2/M3. 5. 24. E.A.C. - SERVO X.9910 When I asked you for RRM. with DES.60 I concluded that from your and Mr. Elliott's memo. there was no doubt that the… | ||
| scan0159 | Secret memo discussing experiments to avoid brake 'jaggers', suggesting tests with stiff brake drums as used on Hispano and Isotta cars. | ||
| View original record | 49910 To RG. and HS. from R. S E C R E T. R3/M3. 5. 24. E. A. C. SERVO - RE. JAGGERS. X.9940 X.1559. X 4214 X9910 In spite of your numerous and valuable experiments we are not much nearer to the… | ||
| scan0160 | Issues and potential modifications for a servo braking system scheme. | ||
| View original record | X.9940 (crossed out) X9910 To RG+ & HS. FROM R. S E C R E T. R5/M3.5.24. E.A.C. - JAGGERS - X.9940 (crossed out) Regarding jaggers on the RRM. scheme (I do not know about the others) I notice on this… | ||
| scan0161 | Avoidance of 'jaggers' by experimenting with stiff versus flexible brake drums. | ||
| View original record | To RG. & HS. FROM R. 49910 S E C R E T. R3/M3.5.24. E. A. C. SERVO - RE. JAGGERS. X.9940 X.1559 In spite of your numerous and valuable experiments we are not much nearer to the complete avoidance of… | ||
| scan0162 | Required speed of a brake servo and comparing different design schemes. | ||
| View original record | To HS. & RG. from R. +9910 SECRET. R6/M 3.5.24. E. A. C. SERVO. X.9945 In your early memos, you indicated that the slow speed servo is required to put the brakes on slowly and regulate the speed at… | ||
| scan0163 | Design of a brake pedal for use with a servo. | ||
| View original record | To BY. from DA/EV. c. to CJ. HS. Wor. S E C R E T. +9910 DA/EV1/M7.5.24 E.A.C.111. X.9910 X.9470 RE. PEDAL FOR SERVO LeC.1867. We send herewith N.sch.1802 shewing the brake pedal for use with servo on… | ||
| scan0164 | Urgent outsourcing of grinding for servo spur gears for the gearbox. | ||
| View original record | 49910 [Text obscured] c.Hs. [Text obscured and crossed out] BY/HM3/K. 7.5.24. SERVO SPUR GEARS FOR GEARBOX ---------------------------- It was originally intended that the above gears should be ground… | ||
| scan0165 | Finalization of the E.A.C. servo and the adoption of the RRM. Des. 60 braking scheme. | ||
| View original record | X.9910 X9910 To BY. from R. c. to CJ. RG. DA. E. HS. S E C R E T. R4/M8.5.24. Y E.A.C. SERVO. X.9940 Mr. Day is finishing the supplementary levers in connection with the servo, and the scheme of… | ||
| scan0166 | Material change for gears from 3.5% Nickel Steel to a harder 5% C.H.N.S. steel. | ||
| View original record | X9910 Mr. Hives. Sft. Hs. BY32/H. 9. 5. 24. ------------------- From the experience that Hs. has had with the soft gears, that is, 3½% Nickel Steel, with a Brinell Hardness of 321, which are "digging… | ||
| scan0167 | Confirming the decision to use a 7 to 1 reduction for the E.A.C.III servo mechanism. | ||
| View original record | X9910 Mr. D'Aeth. c. Sft. c. Wd. c. Hs. E.A.C.III. SERVO MECHANISM. The Experimental Dept. have now finally decided in favour of the 7 to 1 reduction as against the 10 to 1. instructed in accordance… | ||
| scan0168 | Secret memo about successfully reproducing a 'jagger' fault on a servo mechanism and a proposed fix. | ||
| View original record | X9940 X9910 To PN. from Hs. c. to BJ. SECRET. SERVO. Hs5/LG23. 5. 24. We have been able to re-produce the jagger on the servo which you complained of. It is the first time we have experienced it and… | ||
| scan0169 | Secret memorandum discussing production difficulties and potential alterations for servo motor thrust washers. | ||
| View original record | X.9910. S E C R E T. E2/M24.5.24. To BY. from E. c. to CJ. HS. RE. SERVO MOTOR. X.9910. Referring to drawing LeC.1867, Mr. Day informs us that you have difficulty in producing the thrust washers.… | ||
| scan0170 | Internal memorandum discussing defects and policy regarding the E.A.C. steering servo adjustment. | ||
| View original record | To HS. from R. X9910 SECRET R4/M26.5.24. E.A.C. STEERING. X.9910. X.9940 X.9430 Regarding the adjustment of the servo, there must be something defective with the way in which this arrangement has been… | ||
| scan0171 | Technical discussion on brake performance, balance, skid characteristics, and materials. | ||
| View original record | contd :- (2) (a) That the RR. brakes shall require a fair amount of foot pressure to make them operate vigorously, namely, more than the Hispano, so that dangerous braking shall not occur so easily.… | ||
| scan0172 | Optimal angle for a Face Cam operating a Servo, debating a change from 45° to 55° for braking. | ||
| View original record | 49910 Mem. Mr. [Illegible] Mr. Hivesth. Mr. Hs. BY24/H. 27.5. 24. The Face Cams operating the Servo mechanism still appear from one of Hs' reports to be in doubt from the point of view as to what is… | ||
| scan0173 | Secret memorandum on the development status of the four-wheel brake system. | ||
| View original record | To R. from DA. c. to CJ. Wor. RG. BY. Hs. 49910 S E C R E T. DA1/M27.5.24 E.A.C. 111. FOUR WHEEL BRAKES. X.9940 X.9910 The position of the work on these brakes is as follows :- (1) The adopted scheme… | ||
| scan0174 | Continued technical report discussing steering, braking systems, and wheel hub design. | ||
| View original record | contd:- -2- steering tube to be set .75 in centre. (4) Though jaggers still appear it is understood that by reducing the amount of ferodo on the shoes they can be made negligible, this reduction of… | ||
| scan0175 | Difficulties with a servo motor's ball bearing and thrust washer. | ||
| View original record | +9910 E. Hs. CJ. BY25/H. 27. 5. 24. E.A.C.III. SERVO MOTOR. -------------------- Referring to E2/M. 24. 5. 24. there was no real difficulty in connection with LeC.1867. By an oversight we had… | ||
| scan0176 | Letter from F.H. Royce detailing three schemes for a patented four-wheel brake system. | ||
| View original record | X9910 Copy to CJ. HS. BJ. RG. DA. BY. S E C R E T. E. A. C. ELMSTEAD, WEST WITTERING, CHICHESTER. 3rd. June 1924. A.W.Claremont, My dear Mr. Claremont, RR. FOUR WHEEL BRAKES. X.9940 X.9910. The narrow… | ||
| scan0177 | Testing the efficiency of a servo with various cams. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. Handwritten: x9910 EXPERIMENTAL REPORT. Handwritten: x9940, x9910 COPIES TO: R.C.J. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. 2940 (2550 is crossed out)… | ||
| scan0178 | Measuring servo torque multiplication on a car using spring balances. | ||
| View original record | R.R. 493A (20H) (D.A. 652 20-8-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF. Hs/ACL/HG3. 6. 24. SERVO MULTIPLICATION MEASURED ON CAR, (NO. 44-PK.) The torque multiplication of the servo was measured… | ||
| scan0179 | The torque multiplication of a servo with Ferodo linings. | ||
| View original record | R.R. 493a (20H) (D.A. 652 20-3-24) J.B.D. -2- Expt. No. REF: Hs/ACL/LG3. 6. 24. EXPERIMENTAL REPORT. ∴ 2.625/2 x 5.8/7.9 = B. ∴ S = 2/2.625 x 7.9/5.8 TORQUE MULTIPLICATION OF SERVO G.72550 - Ferodo… | ||
| scan0180 | Feedback on a car's adopted braking scheme, including pedal pressure, servo, safety, production parts, and steering. | ||
| View original record | 49910 SECRET. To HS. from R. c.c. to CJ. BJ. c.c. to RG. DA. c.c. to E. PN. EP. RE. CAR WITH ADOPTED SCHEME OF BRAKING. PEDAL PRESSURE. The car and brakes appear very satisfactory. If at all wrong the… | ||
| scan0181 | Test report page discussing the performance of the clutch, brakes, and servo system. | ||
| View original record | contd:- -2- long run through much water. CLUTCH. The clutch on this car (standard 40/50 ) was far better than on my car, because the clutch brake did not stop it so quickly. JAGGERS. I was pleased to… | ||
| scan0182 | Four-wheel brake tests, including an extract about the countershaft and overrun mechanism. | ||
| View original record | R.R. 495A (20H) (D.A. 652 20-3-24) J.H.D. X9910 EXPERIMENTAL REPORT. Expl. No. 9941 REF: Hs5/Lg18.6.24. 9910 S E C R E T. FOUR WHEEL BRAKE TESTS. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY.… | ||
| scan0183 | Schematic diagram showing the motion of levers when the brake pedal is depressed. | ||
| View original record | Solid Shaft to Replace Dogs. Stationary irection of motion of levers when brake pedal is depressed indicated by arrows. J.H.Harvey | ||
| scan0184 | Noise issues originating from servo gears in the four-wheel brake system. | ||
| View original record | R.R. 495A (20H) (D.A. 652 20-8-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. 9910 REF: Hs3/LG19.6.24. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. SECRET - FOUR WHEEL BRAKES. NOISE FROM SERVO… | ||
| scan0185 | Drive shaft reduction and brake pedal pressure, specifically regarding car 35-PK. | ||
| View original record | R.E. 495A (SOH) (D.A. 652 20-5-24) J.H.D. -2- EXPERIMENTAL REPORT. Expl. No. 9940 9910 REF: Hs3/LG19.6.24. ultimate reduction, if it is coming from the worm it should alter the impulses of the drive… | ||
| scan0186 | Instructions for testing servo torque multiplication using spring balances on a car. | ||
| View original record | 49910 Expl: Dept: Messrs. Rolls-Royce Ltd., Derby. Angleterre. 20TH. June 1924. Hotel de France, Chateauroux, Indre, France. 49941 x9960 Mr. Lidsey, from Hs/Mr.Lovesey. TESTS FOR DETERMINING THE SERVO… | ||
| scan0187 | Diagram illustrating the method for arranging 'set up' springs on a car, with a formula for servo torque multiplication. | ||
| View original record | [ "METHOD OF ARRANGING "SET UP" SPRINGS", "ON CAR.", "TO "PICK UP" COUNTERSHAFT", "SERVO", "SPG. BAL.", "A", "B", "STEP ASIDE COUNTERSHAFT", "TO FRONT EQUALIZER", "SERVO TORQUE MULTIPLICATION IS… | ||
| scan0188 | Secret memo discussing the simplification of the servo and differential linkage by making the countershaft solid. | ||
| View original record | X9910 To Hs. from DA. SECRET. DA5/M21.E.24. E. A. C. X.9910 X.9941. Referring to your Hs5/LG18.6.24., it is quite true that the trip on the countershaft might be dispensed with. It provides a… | ||
| scan0189 | Patentability and originality of a plate clutch for a servo, comparing it to Renault and Hispano designs. | ||
| View original record | x9910 SECRET. R1/M23. 6. 24. To EY. and Mr. Claremont. From R. c. to CJ. BJ. RG. DA. E. Hs. E. A. C. PLATE CLUTCH FOR SERVO. X.1013. RE. RENAULT. X.9910 X.4214 I cannot see that the substituting of… | ||
| scan0190 | Secret internal memo regarding a delay with the E.A.C. car due to noisy servo gears. | ||
| View original record | To BJ. from Hs. S E C R E T. x9910 Hsl4/LG25.6.24. E.A.C. CAR. x9680 x9910 We regret that the EAC. car will not be ready in time for you to take to WW. this week-end, although before the end of the… | ||
| scan0191 | Secret memo regarding the design of levers on the countershaft for four-wheel brakes. | ||
| View original record | X9910 To BY. from Hs. S E C R E T. Hs5/LG27. 6. 24. FOUR WHEEL BRAKES. X9910 X9910 We recommend that the Works do not get too far ahead with the levers on the small countershaft with the pick-up dogs.… | ||
| scan0192 | Secret memorandum discussing noise issues in the servo drive and comparing different reduction ratios. | ||
| View original record | X.9910. To HS. from R. c. to CJ. BJ. RG. WOR. E. DA. BY. EP. S E C R E T. R5/M27.6.24. E. A. C. SERVO DRIVE. X.9910. You complain of noise in the servo drive which is confined to the 7 to 1 reduction,… | ||
| scan0193 | Modifications to reduce noise and vibration from servo gears. | ||
| View original record | R.R. 498A (20H) (D.A. 652 20-3-24) J.H.D. 49910 Expl. No. 9910 REF:Hs8/LG27.6.24. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. S E C R E T. NOISE FROM SERVO GEARS. We… | ||
| scan0194 | Noise in a servo drive, comparing 7 to 1 and 10 to 1 reduction ratios and their implications. | ||
| View original record | X.9910 To Hs. from R. c. to CJ. BJ. Wor. c. to E. DA. BY. c. to EP. S E C R E T. R5/M27.6.24. E. A. C. SERVO DRIVE. X.9910 You complain of noise in the servo drive which is confined to the 7 to 1… | ||
| scan0195 | From R. to HS. about successfully creating quiet gears for the servo drive by increasing worm teeth obliquity. | ||
| View original record | To HS. from R. L9910 R2/M30.6.24. FOUR WHEEL BRAKES. X.9940 X.9910. I was very pleased to hear that you have succeeded in getting quiet gears for the servo drive. You have proved that it is not… | ||
| scan0196 | Brake and spring testing of two cars in France. | ||
| View original record | R.E. 498A (20H) (D.A. 652 20-3-24) J.B.D. Expl. No. 9941 9810 REF: Hs2/LG30.6.24. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. Wor. S E C R E T. ADOPTED SCHEME OF BRAKES -… | ||
| scan0197 | Procedure for testing the efficiency of a servo using a specialized apparatus. | ||
| View original record | 49910 Hsl/LG9.7.24. TESTING THE SERVO EFFICIENCY. Apparatus for testing the efficiency of the servo can easily be fitted up to work either on the car or on the Gearbox testing rig. It is probably… | ||
| scan0198 | Instructions regarding servo operation, 'Halo' friction lining, and test rig procedures. | ||
| View original record | contd:- -2- to lock the rear wheels as this stops the servo rotating and if any additional pressure is applied to the servo there can be no increase in the pull on the springs balance 'B'. Release the… | ||
| scan0199 | Design and patent application for a shoe-type servo mechanism. | ||
| View original record | X.9910. R2/M9.7.24. To BY. from R. c. to CJ. BJ. Hs. Mr. Claremont. RE. SERVO. X.9910. We are sending you tomorrow night the drawings of a shoe type of servo which we think should be clear of all… | ||
| scan0200 | Shoe-type servo design (N.sch.1823) as a contingency for failing plate clutch negotiations. | ||
| View original record | X.9910 To BY. from DA. c. to CJ. HS. S E C R E T. E.A.C.S. SERVO. X.9910. DA2/M17.7.24. We send you herewith N.sch.1823., shewing a design of servo of the shoe type, which will fit into the existing… | ||
| scan0201 | Preference for a plate clutch servo and the patenting of an alternative shoe servo design. | ||
| View original record | To BY. HS. and) Mr. Claremont.) FROM R. X.9910 S E C R E T. E. A. C. R5/24.7.24. Regarding the servos we do not wish to depart from the plate clutch servo unless we are obliged to do so, but I have… | ||
| scan0202 | Secret memo regarding the design and patenting of an automatic control oil servo system. | ||
| View original record | To E. from R. c. to CJ. BJ. Hs. BY. MR. CLAREMONT. X9910 [handwritten and crossed out] S E C R E T R3/M24.7.24. E. A. C. Xx42xxx [crossed out] X.9910 X.9240 RE. R-R AUTOMATIC CONTROL. (OIL SERVO). It… | ||
| scan0203 | Issue of a noisy servo gear mechanism on the 'U' series chassis. | ||
| View original record | x9910 c. Hs. EP3/H19.9.24. re. "U" SERIES CHASSIS - NOISY SERVO GEAR MECHANISM. We have for some time been investigating the noise from the Servo Gear, a feature which I appreciate existed with the… | ||
| scan0204 | Ongoing issue with noisy servo gears. | ||
| View original record | To Wor. from Hs. c. to EP. c. to BY. [Handwritten: X9910] Hs6/LG19.9.24. RE. NOISY SERVO GEAR. [Handwritten: X9940 (crossed out) X9910] The question of the servo gear noise was taken up with R. on the… | ||
| scan0205 | Continued document discussing the results of experiments for noise reduction modifications. | ||
| View original record | contd :- -2- was certain to arise. As a result of our experiments, we are in a position to recommend modifications which will reduce the noise but we do not know of a means of elliminating it… | ||
| scan0206 | Servo gear noise in 40/50 HP chassis fitted with 4-wheel brakes. | ||
| 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. BJ. c. to RG. E. c. to DA. EY. c. to Wor. EP. Expl. No. K9910 REF. Hs4/LG24.9.24. SERVO GEAR NOISE. K9910 K9940… | ||
| scan0207 | Testing different servo gear arrangements to reduce noise in the 46-PK car. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. -2- EXPERIMENTAL REPORT. Expl. No. REF Hs4/LB24.9.24 46-PK car at WW. has this arrangement of servo. We had hoped that the worm giving the 7 to 1 reduction… | ||
| scan0208 | Fix for rattling Servo Reduction Gears by adjusting keyway slack. | ||
| View original record | U.W. X9910 Srt. [Crossed Out] Mr H...th. [Crossed Out] Hs. [Crossed Out] Er. [Crossed Out] Her. [Crossed Out] EY2/H. 26.9.24. ------------- SERVO GEARS. ------------- Hs has discovered a means for… | ||
| scan0209 | Reducing servo gear noise by introducing slight torsional movement. | ||
| View original record | R.R. 493A (20H) (D.A. 652 20-2-24) J.B.D. Expl. No. X9910 REF: Hs5/LG29.9.24. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to EP. Wor. SERVO GEAR NOISE. We have… | ||
| scan0210 | The proposal to make grinding the faces of the 40/50 HP servo drum and halo a standard practice. | ||
| View original record | X9910 [obscured] Matthews. O. Hor. c. Hs. EP4/H3.10.24. re. 40/50 HP. Servo Gears. With reference to the above, I understand that Hm. has obtained much more satisfactory results as regards the working… | ||
| scan0211 | The importance of trueness for revolving members and 'Halo' surfaces on 40/50 HP servo gears. | ||
| View original record | To EP. from Hs. c. to Sft. c. to Wor. c. to BY. X9910 Hs1/LG6.10.24. 40/50 HP. SERVO GEARS. The most important factor in order to get a smooth acting servo, is to have the revolving member true. It… | ||
| scan0212 | Delays in 40/50 HP chassis deliveries due to issues with the servo gear and the progress on a solution. | ||
| View original record | X9910 [handwritten] [Text struck through] C. Hs. EP1/H9.10.24. re. Deliveries of 40/50 HP. Chassis. With reference to Sales memo C7/C8.10.24, under cover of your Wor7/MB.10.24. We quite agree that the… | ||
| scan0213 | Design considerations and adjustments for a 4-wheel brake system. | ||
| View original record | To HS. from R. c. to CJ. BY. f9910 R7/M16.10.24. 4-WHEEL BRAKES. X.9940 X.9910 Your memo. re. the above to hand. (1) Though we instructed friction in the top joint of the suspension link, we consider… | ||
| scan0214 | 'servo jagger' fault on the 48-PK car and a recommendation to send it to Derby for demonstration. | ||
| View original record | To BJ. from Hs. X9910 Hs4/LG17.11.24. 48-PK CAR. X9910 X9770 With reference to BJ2/H14.11.24. We are aware that the servo jagger can occur and experiments are in hand to find a means of eliminating… | ||
| scan0215 | Instructions to coachbuilders regarding floorboard clearance for the 4-wheel brake servo stop. | ||
| View original record | To BY. from Hs. c. to EP. c. to Mx. c. to hm. [Handwritten]: 19910 Hsl/LG24.11.24. 4-WHEEL BRAKES. [Handwritten]: 19940 (crossed out) [Handwritten]: 19910 Special instructions should be given that the… | ||
| scan0216 | Faulty servo gears on the 40/50 HP model due to paint and lubrication on friction surfaces. | ||
| View original record | Y9910 c. Hs. c. Wor. c. Mx. EP3/H13.2.25. re. 40/50 HP. Faulty Servo Gear. Trouble has been experienced on new chassis delivered with unsatisfactory servo gear mechanism, owing to the presence of… | ||
| scan0217 | Stove enamelling servo motor drums for the 40/50HP chassis to prevent paint issues. | ||
| View original record | Sfter [crossed out] Drawing Office [crossed out] C. Hs. [crossed out] C. Wks. [crossed out] Y9910 BY/C15/W.17.2.25. 40/50HP. CHASSIS. SERVO MOTOR. With reference to EP3/HL.2.25, we agree that it would… | ||
| scan0218 | History and resolution of a fault causing rattling servo gears. | ||
| View original record | X9910 WCr. c. Hs. c. EB c. LW. BY7/H. 31.3.25. RE RATTLING OF SERVO GEARS. -------------------------- Referring to the attached correspondence on the above matter, it is very easy for the original… | ||
| scan0219 | Report investigating the failure of spring steel and mild steel fitted dampers (spiders), detailing potential causes and a proposed solution. | ||
| View original record | - 2 - BY7/H. 31.3.25. ---------------- to make up two dozen spiders in Mild Steel, as I had satisfied myself it could fulfil the duty imposed upon it. The next point is that both the spring steel and… | ||
| scan0220 | Policy for dealing with rattling servo gears by fitting ground gears. | ||
| View original record | Wer. c. HS. c. EP. c. HW. +9910 BY15/W.22.4.25. RE RATTLING OF SERVO GEARS. EP. has informed me that you are in agreement with the policy I set out in connection with the above, and I have therefore… | ||
| scan0221 | And comparing different 4-wheel brake distribution configurations for the India model. | ||
| View original record | To Hs. from DA. c. to R. X9910 SECRET. DA2/M25.5.25. INDIA. 4-WHEEL BRAKES - BRAKE DISTRIBUTION. X.9940 X.9910 Referring to your Hs4/LG20.5.25., we should like to point out that the information given… | ||
| scan0222 | Continued discussion on servo braking efficiency and its distribution relative to car weight. | ||
| View original record | contd :- -2- Incidentally in the instructions given in "Hsl/LG9.7.24. for testing the EAC.3. servo efficiency "it appears that the ratio of rod loads is expected "to come within the limits given on… | ||
| scan0223 | Testing of a fabric coupling on a 40/50HP 'U' Series chassis to diminish body booms. | ||
| View original record | W/S. CWB. c. Hs. Y9920 BY6/W.5.3.25. 40/50HP. CHASSIS. "U" SERIES. FABRIC COUPLING. ---------------- Referring to your memo' CWB12/LH.3.3.25, the fabric coupling, as such, for durability is being at… | ||
| scan0224 | Requesting a standard 40/50 HP car to test a fabric coupling intended to cure 'transmission groans'. | ||
| View original record | R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. X9920 REF: Hs2/LGS.3.25. to BJ. from Hs. c. to EY. c. to WOR. FABRIC COUPLING FOR STANDARD 40/50 CHASSIS. X3435 X9920 We… | ||
| scan0225 | Urgent request for fabric couplings to resolve noise issues in 'U' Series 40/50 HP cars. | ||
| View original record | x9970 To Hs. from BJ. BJ6/H18.3.25. FABRIC COUPLING. We are likely to require a certain number of the fabric coupling to fit to 'U' Series 40/50 h.p. cars in the near future. At present we require… | ||
| scan0226 | The testing and standardisation of a new fabric coupling for the 40/50 HP car. | ||
| View original record | R.R. 493A (50n) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. L9920 REF: Hs./L/19.3.25. To BJ. from Hs. c. to EY. WOR. S E C R E T. 40/50 HP. - FABRIC COUPLING. X8305 X9920 Referring to… | ||
| scan0227 | Requesting weight information for the Goshawk and 40/50 engines to estimate the weight of the 'Seagull' engine. | ||
| View original record | [strikethrough]X.4572[/strikethrough] X9930 To Hs. from E. E5/M9.12.22. re. WEIGHT OF "SEAGULL" ENGINE [strikethrough]X.4572[/strikethrough] X9930 In accordance with Mr. Royce's wishes would you… | ||
| scan0228 | Secret internal memo requesting a weight comparison for the E.A.C. engine and chassis against the current models. | ||
| View original record | To Hs. from BJ. BJ12/H6.2.24. X9930 SECRET. Can you please let us know the weight of the E.A.C. engine, as compared with our present engine? Do you think the E.A.C.4 will be heavier than our present… | ||
| scan0229 | Weight impact of adding front-wheel brakes, a larger radiator, and a new 4-speed gearbox. | ||
| View original record | To BJ. from Hs. X9930 Hs4/LG8.2.24. With reference to your memo. BJ12/E6.2.24. We attach a report on the EAC. engine weight. We should anticipate that the addition of front wheel brakes will add… | ||
| scan0230 | Correcting and detailing the engine weights for an EAC engine, comparing cast iron and aluminium induction pipes. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. X 9930 EXPERIMENTAL REPORT. Expl. No. 9930 200 REF: Hs1/LG11.2.24. To R. from Hs. c. to CJ. RG. c. to E. WOR. c. to DA. PN. c. to BY. S E C R E T. EAC.… | ||
| scan0231 | Comparing the weights of cast iron versus aluminium induction pipes and hot spots. | ||
| View original record | To R. from Hs. c. to CJ. RG. c. to E. DA. c. to BY. WOR. c. to PN. X9930 SECRET. Hs1/LG11. 2. 24. EAC. ENGINE WEIGHTS. X.9930 X.200 The weights given in our Hs2/LGS.2.24 of the EAC. engine included… | ||
| scan0232 | Weight of four-wheel brakes and the potential use of lighter materials like aluminium and duralumin. | ||
| View original record | x9930 To DA. RG. E. from R. c. to CJ. BY. BJ. WOR. HS. PN. S E C R E T. E. A. C. R6/M15.2.24. FOUR WHEEL BRAKES. X.9940 X.4214 X.9930. Owing to the more general use of steel our brakes seem to have… | ||
| scan0233 | Secret memo discussing the EAC engine's weight and power, comparing it to the 40/50 model and outlining performance improvement goals. | ||
| View original record | To E. from R. c. to CJ. c. to HS. c. to BY. ✓9930 S E C R E T. R4/M15.2.24. RE. EAC. ENGINE WEIGHT AND POWER. X.9930 X.9771 X.9770 This is 122 lbs. heavier than the 40/50. Nearly all is in the… | ||
| scan0234 | EAC steering, discussing pivot pins, castor action, and road shocks. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9430 REF: Hsl/LG16.2.24. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. Wor. S E C R E T. EAC. - STEERING. We find, owing… | ||
| scan0235 | Comparing the weight of the EAC engine against the 40/50 engine, detailing component differences. | ||
| View original record | X9930 To Hs. from E. c. to R. CJ. RG. WOR. SECRET. E2/M18.2.24. RE. WEIGHT OF EAC. ENGINE. X.9930 X.200 The comparison of weights between the EAC. and 40/50 does not appear to be quite fair to the… | ||
| scan0236 | Telegram received by telephone requesting the weights of two front springs for an E.A.C. car. | ||
| View original record | RR 144A (20BKS.) (SK 871 23-5-23) MP 272631 ROLLS-ROYCE LTD. TELEGRAM RECEIVED BY TELEPHONE Time Received: 1-10 Date: 9-9-24 To: Rep. Derby By: WGA from: West Wittering 12.15 Message Body: Hines… | ||
| scan0237 | From the Test Department detailing the average weights of the 40/50 'U' series and 20 HP chassis. | ||
| View original record | C O P Y. X9930 To Hs/ACL. from Test Dept. 24.2.25. RE. CHASSIS WEIGHTS. X.9930 X4538 In reply to your telephone message :- 40/50 'U' series. 20 HP. Average weight - total 3800 lbs. 2490 lbs. Average… | ||
| scan0238 | The dimensional conflict between the 'C' type steering and a proposed cabriolet body. | ||
| View original record | RHC to HS. from EV. copy BT HS X9930 EV2/5.12.25. RE CABRIOLET BODY FOR E.A.C.I. Further to our EV1/1.12.25. and N.Sch.2082. we would point out that the "C" type steering which we wish fitting to the… | ||
| scan0239 | Breakdown of the weights for the rear axle and springs for a car. | ||
| View original record | To Hs/Rm. from RHC. X9930 RHC2/BE 26.1.26. EAC.1. (9-EX) X.8920 X.9930 X.9410 The weight of rear axle and springs for the above car are as follows :- Rear axle complete with hubs, drums and brake gear… | ||
| scan0240 | Comparing the inertia and weight of original, and lightened/improved Phantom and Silver Ghost flywheel and clutch units. | ||
| View original record | Expl. Report. X9930 To R. from Hs/ACL. Cr. F.G. Yor. C. F.G. Hives C. Day. Ry. C. Hs/ACL. 7 Hs/ACL1/T10.6.26. INERTIA AND WEIGHT OF PHANTOM & SILVER GHOST FLYWHEEL & CLUTCH UNITS. X8300 X9300 X8840… | ||