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Rolls-Royce Experimental Archives: Box ExFiles\Box 105\4\        Box Selection

IdentifierEntry
scan0001 The nearing completion of a 4-speed side lever servo drive and gearbox for the Goshawk.
View original record X5370 (handwritten and underlined) To Hs. from R. c. to CJ. PJ. BY. E. DA. RG. R2/M27.6.24. RE GOSHAWK. X.5300. X5370(handwritten) X.5060 X.4219. X.5010(struck through) X.4247. The 4 speed side lever…

scan0002 Points for attention on the 4-speed side change servo drive Goshawk gearbox.
View original record X5370 To BY. HS. } FROM AJS. c. to R. c. to CJ. AJS1/M3.12.24. RE. 4-SPEED SIDE CHANGE SERVO DRIVE GOSHAWK GEARBOX. X.5770 X.5310 X.5370 The following are a few points requiring attention on the model…

scan0003 Continued list of notes and proposed modifications for various mechanical components.
View original record contd :- -2- (4) PENDULUM LEVER. We note the horns for operating interlock are of different heights. We cannot sanction this even to facilitate machining, and consider that they should be improved by…

scan0004 Note explaining the function of a square edge on a bore to clean particles from a shaft and prevent wedging.
View original record contd :- -3- The intention is that the more or less square edge at the forward end of the chambered bore should clean from the shaft particles of foreign matter when the sleeve is slid upon it, and so…

scan0005 Secret memo discussing testing requirements for the Goshawk 3 three-speed gearbox with servo.
View original record To Hs. from R. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to AJS. X5370 S E C R E T. RL/M7.1.25. GOSHAWK 3. THREE SPEED GEARBOX WITH SERVO. X.5770 X.5310 X.5370 Mr. Stent points out that this servo…

scan0006 Two arrangement options for the servo and hand brake on the Goshawk three-speed gearbox.
View original record X5370 To AJS. ) To E. } FROM R. c. to CJ. BJ. c. to DA. BY. c. to HB. R4/M10.1.24. GOSHAWK THREE SPEED GEARBOX. X.5310 CENTRAL CHANGE WITH SERVO. X.5770 X.5370 Re. Mr. Stent's memo. I had looked at…

scan0007 Authorisation sheet to modify the 'India' plus F.W.B. servo drive worm wheel due to fast wear.
View original record Secret. -------- c. C.J. c. Wor. c. Hs. 15370 BYA/H. 14.5.25. -------------- AUTHORISATION SHEET NO.9. "INDIA" PLUS F.W.B. SERVO DRIVE WORM WHEEL. --------------------------- You will probably have…

scan0008 Authorisation sheet for replacing the straight top worm wheel on the 20 HP Servo Drive.
View original record X5370 WOF. Hs. Sft. BY3/H. 15.5.25. AUTHORISATION SHEET NO.8. 20 HP Please note we have received CJ's consent to replace the straight top worm wheel on the Servo Drive, arranged by West Wittering,…

scan0009 Multiplication power of front wheel braking servos and proposed modifications to improve travel and clearance.
View original record To Hs. from R. c. to CJ. Wor. c. to DA. BY. V5370 S E C R E T. R3/M5.6.25. I N D I A. FRONT WHEEL BRAKING. X.5940 X.5370 There have been some arbitrary rules on the multiplication power of the servo.…

scan0010 Secret memo regarding instructions and modifications for a front wheel braking system.
View original record X5370 To Hs. from DA. c. to BY. DA3/M8.6.25. S E C R E T. I N D I A FRONT WHEEL BRAKING. X.5940 X.5370 Referring to Mr. Royce's memo. R3/M5.6.25., we have sent you instructions and information…

scan0011 Mr. Royce's opinion on direct braking versus servo power and proposed modifications to brake cam and lever proportions.
View original record To HS. from DA. c. to RG. BY. x.5370 S E C R E T. DA1/M9.6.25. I N D I A X.5940 X.5370 PROPORTIONS OF BRAKING. With further reference to Hs/Rm2/LG27.5.25., Mr. Royce does not approve of the suggestion…

scan0012 From D.A. to Hs. about altering the proportion of direct braking and its effect on servo efficiencies.
View original record To Hs. from DA. contd :- DA1/M9.6.25. We have looked into the question of altering the proportion of direct braking, and find that quite a considerable alteration does not make much difference to the…

scan0013 Secret memorandum detailing modifications for front brake adjustment and specific braking performance requirements.
View original record 45370 To BY. & Hs. from R. c.c. to CJ. BJ. Wor. S E C R E T. R1/M10.6.25. INDIA & EAC. X.5940 X.8370 FRONT BRAKE ADJUSTMENT. X.5370 X.8420 DA. is sending through particulars of a simple modification…

scan0014 Page two of a typed memorandum discussing the need to act quickly once a course of action is decided.
View original record contd :- -2- right as quickly as possible. Often we do not know what to do, but when we do we are forced to urge a rapid move towards it. R.

scan0015 Diagram and chart analyzing a modified braking system's efficiency and distribution.
View original record INDIA MS4 / LG 20525 AS MODIFIED BY N.SCH. 2005 & DAI / M 9625 DIAGRAM TEXT & VALUES: DRUM DIA. 13" .5 CAM 3.35 2.25 1.35 13.0° 4.35 1.187 1.350 2.00 2.150 4.00 4.875 1.850 2.150 2.00" 3.150 6.00 DRUM…

scan0016 The efficiency testing and specifications of the 'INDIA' servo.
View original record To Hs. from Hs/Rn. X5370 Hs/RnL/LG17.6.25. 'INDIA' SERVO. We have tested the efficiency of this servo. We find that the average torque multiplication is 1.24. The extreme variations in the servo…

scan0017 Requesting a modification to a servo drive worm wheel for a 4-speed gearbox to reduce its weight.
View original record X5370 To BY. from AJS. c. to HS. SECRET. AJS2/M22625 I N D I A+ 4-SPEED GEARBOX. X.5310 X.5370 On the model of servo drive worm wheel recently brought here by Hs., we found that the weight came out at…

scan0018 Part replacements for the servo motor mechanism on a 20-HP Indian chassis.
View original record C O P Y. X5370 To Wd. C. O.P.Dept. C. TD. C. Sft. C. CHAT. C. My/Rns. C. Eff.Dept. BY/TWD7/GK.3.7.25. 20-HP. CHASSIS (INDIA). (4). SERVO MOTOR MECHANISM. SECTION 6180. Please receive herewith the…

scan0019 Inquiry about the availability of a slotted link connection for the Servo, required for all 'India' and FWB cars.
View original record x.5370 Sft c. Hs. BY10/H. 14.8.25. Could you let me know when the slotted link connection for the Servo, which was instructed just before the holidays, will be available. The Experimental Dept. inform…

scan0020 Servo rattle complaint in 20 HP cars fitted with 4-wheel brakes.
View original record R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. X5370 REF:HS6/LG20. 8. 25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. S E C R E T. 20 HP. CAR FITTED…

scan0021 Mr. Royce's suggestion to reduce servo power on the 20 HP model by modifying the cam angle.
View original record To Hs. from DA. X. 5370 DA1/M20.8.25. SERVO ON 20 HP. Referring to your report on 9-G-111., Hs3/LG18.8.25., when Mr. Royce returned from his holiday he suggested as a result of his experience that it…

scan0022 Rattle on the 20 HP car with four-wheel brakes, stressing it must be fixed before customer delivery.
View original record (5370) SECRET. To Hs. from BJ. BJ1/H25.8.25. 20 HP. Car fitted with Four-Wheel Brakes. With reference to Hs6/LG20.8.25, PN. and CWB. are glad to hear that investigations have been carried out to cure…

scan0023 Modifications to address 'servo jaggers' on 20 HP and 40/50 models.
View original record To Hs. from R. /5370 R1/M25.8.25. c. to CJ. BY. BN. RE. SERVO JAGGERS. 20 HP. and 40/50. X.8370 X.8370 Apparently the less effective cams reduce the tendency for servo jaggers, but Hancock in Frances…

scan0024 Report on tests investigating a rattle from the servo gears on a 20 HP car.
View original record To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. +5370 Hs4/LG4. 9. 25. 20 HP. SERVO GEARS. +5840 We attach a report of tests carried out in France on 9-G-111 investigating the rattle…

scan0025 Servo gear rattling issues on chassis 9-G-111 under various driving conditions.
View original record R.R. 498a (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: GWH2/Crn27.8.25. Hotel de France, Chateauroux, Indre, France. GWH2/Crn27.8.25. To Hs. From G.W. Hancock. CHASSIS 9-G-111.…

scan0026 Tests to determine the amount of damping required to stop a rattle in a servo drum.
View original record contd :- -2- Amount of damping required to stop rattle. We have not been able, and have not the appliances here, to give us the load applied to the drum on this test. By applying a load direct on to…

scan0027 Performance of a cam for four-wheel brakes on car GOS.111 in France.
View original record To Hs. from R. c. to CJ. BY. X5370 R6/M1.9.25. GOS.111. in FRANCE. X.5840 X.5940 X.5370 It would appear that the cam for the four wheel brakes on this car is about as good as it can be, the report…

scan0028 Responding to queries on brake adjustments, servo engagement, and braking distribution for 'Phantom' and 'India' models.
View original record R.R. 493A (50 H) (D.D. 31. 12-6-25) J.H.D. EXPERIMENTAL REPORT. Expl. No. +5370 REF Hs/Rm3/LG16.9.25. BY/NW. from Hs/Rm. In reply to BY/NW2/VM15.9.25. The answers to your queries are as follows :- 1.…

scan0029 Servo and steering issues on the 'India' chassis, specifically car 9-G-111.
View original record R.R. 498a (50 M) (D.D. 31. 12-6-25) J.H.D. <5370 Expl. No. REF: Hs6/LG25.9.25. EXPERIMENTAL REPORT. To BJ. from Hs. DELIVERY OF 'INDIA'. <5770 During our last visit to R, there was not sufficient time…

scan0030 Delivery of 'India' chassis, related criticisms, faults, and a modified front axle design.
View original record √5370 To BJ. from Hs. Hs3/LG5.10.25. DELIVERY OF 'INDIA' CHASSIS + 5770 This point was discussed with R. at W.W. R. saw no reason why the present India chassis which have been despatched should not be…

scan0031 Introducing flexibility to the servo operating mechanism to resolve braking issues on 'India' and 'Phantom' cars.
View original record R.R. 493a (50 H) (D.D. 91, 12-6-25) J.R.D. EXPERIMENTAL REPORT. Expl. No. X5370 REF.Hs6/LG9.10.25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. SERVO JAGGERS ON 'INDIA'. X.5370…

scan0032 Efficiency of servos, an issue on car 103-MC, and the recommendation to measure it.
View original record To BY. from Hs. cc to EP By been x5370 Hs1/LG16.11.25. EFFICIENCY OF SERVOS. x5370 / x8370 +4388 From the appearance of the Halo taken off 103-MC we should say that these were not the cause of the…

scan0033 The causes and cures for 'servo jaggers'.
View original record H.R. 498a (50 M) (D.D. 31. 12-6-25) J.H.D. EXPERIMENTAL REPORT. Expl. No. +8370 REF: He2/ACV.12.25 To R. from Hs. c.c. to CJ. DJ. c.c. to RG. E. c.c. to DA. BY. c.c. to Wcr. SERVO JAGGERS. +8370 We…

scan0034 Broken servo bushes on model 9.G.III and a proposal for a thicker replacement.
View original record X5370 To Hs from RHC. RHC1/BE. 9.12.25. RE INDIA SERVOS When Servo on 9.G.III was dismantled it was found that bushes for Pressure Plate dowels were broken away. In one case there was no bush left.…

scan0035 Broken dowel bushes on an experimental car's India Servos and the recommended design alteration.
View original record X5370 To Mr BY from RHC, Or Mr Hes RHC6/BE. 9.12.25. RE INDIA SERVOS The Bushes G.52131 for Servo Pressure Plate dowels were found on an Experimental Car to be broken. (In one case the Bush had…

scan0036 Seeking clarification on the lubrication scheme for the India Gearbox servo drive.
View original record To BY. from AJS. c. to Hs. X5370 AJS1/M14.12.25. RE. INDIA GEARBOX, AND FLOOR CUT AWAY X.5310 X.5500 ABOVE. X.5370 X.5980 We telegraphed you on Thursday last as follows :- "DOES HIVES CONSIDER…

scan0037 Unsuccessful test to fix 'servo jaggers' and a new recommendation involving flexibility in the servo engagement.
View original record To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. SERVO JAGGERS. We omitted to mention in our Hs2/LG7.12.25. that we have tested the scheme given in DA's N.sch. 2075in which a spring…

scan0038 Inquiring about a scheme to introduce flexibility to prevent 'servo jaggers'.
View original record To DA. from Hs. X5370 Hs2/LG1.1.26. SERVO JAGGERS. X8370 We should like to know whether you propose getting out a scheme to introduce flexibility in the engagement of the servo in order to prevent…

scan0039 Experiments to resolve 'servo jagger' issues in the braking system.
View original record To Hs. from DA. X5370 DA2/M5.1.26. SERVO JAGGERS. X. 8370 X. 5370 Replying to Hs2/LGl.1.26., we went into this question very fully with R., and he did not agree at that time to putting flexibility…

scan0040 'Servo Jaggers' and the necessity of the Phantom rubber washer, proposing a steel alternative for permanency.
View original record H / X5370 HS.) To DA.) FROM R. BY.) (Le Canadel.) R3/M22.4.26. Rec'd at WW. evening of 26.4.26. Copy to -BJ. " WOR. " EP. " PN. " CWB. re. SERVO JAGGERS - X.8370. X3855 Apparently these hardly exist…

scan0041 From BJ to Hs regarding the testing, production, and repair use of a scheme related to servo jaggers and a rubber washer.
View original record X5370 To Hs. from BJ. reSERVO JAGGERS. BJ4/E5/5/26 With reference to R3/M22/4/26, I presume the scheme mentioned has been tested for 10,000 miles or over a considerable period? What is being done with…

scan0042 Issue known as 'servo jaggers', recommending a rubber washer as a fix.
View original record To B.J. from Hs. X5370 Hs2/LG8.5.26. SERVO JAGGERS. +8370 BJ4/E5.5.26. The rubber washer which is fitted to introduce flexibility in the servo operation and to eliminate servo jaggers has been in use…

scan0043 Confirming a telegram about vehicle faults and discussing servo braking modifications.
View original record To Hs; from R. c. to CJ. BJ. BY. y5370 R1/M15.5.26. 'INDIA' X.5770 X.5370 X.5310 X.5410 X.5420 We give below a confirmation of telegram sent you yesterday :- "TRY 3 SPLINES ONLY IF STILL WORKS OUT…

scan0044 Modifications and troubleshooting for gears, worms, splines, and damping segments.
View original record contd :- -2- gear capacity than the Hispano, and therefore if properly lubricated, and of good material and shape, the gear will be alright. It was made a straight worm wheel because it was less…

scan0045 Technical discussion on friction dampers and front spring settings, including camber and frame height.
View original record contd :- -3- to fit accurately it could be hammered when in position. The face of the alum. on the drum could have ferodo rivetted to it if by experiment it was proved advisable. In which ways these…

scan0046 Potential improvements to vehicle braking, suspension, and servo design.
View original record contd :- -4- the pivots we can only improve this by giving ample initial xxxx lean, and reducing the front wheel braking as suggested in the first part of this memo. You will remember that I have…

scan0047 Design and performance improvements for bonnet shutters, engine, servo, and steering.
View original record To Hs. BY. } To DA. E. } FROM R. c. to BJ. Wor. c. to FN. CWB. X5370 R2/N26.5.26. INDIA. X.5250 X.5770 X.5370 X.5830 BONNET SHUTTERS. Personally I think these should be altered to vertical to improve…

scan0048 Scheme 2196, showing flexibility in the 20HP servo gear operation and an increased separating spring.
View original record X5370 TO BY. FROM DA. C. to BJ. HS. DA4/M31.5.26. 20HP. SERVO GEAR -X.8370. Herewith we send N.Scheme 2196, shewing the flexibility in the servo operation on the 20HP. similar to that recently sent…

scan0049 Recommending the use of lead bronze bushes and stainless steel to prevent parts from seizing and rusting.
View original record To Hs. RQ. } BY. E. } FROM R. DA. } c. to RJ. CWB. X5370 R2/M7.7.26. RUSTY AND DRY PARTS WHILE STANDING AT COACHBUILDERS. X.3801 X.8430 X.5430 X.8370 X.5370 X3519 I recommend we try lead bronze bushes…

scan0050 Recommendation to use Staybright or stainless steel for the pegs on the servo for the Phantom and 20 HP models.
View original record To BY. from Hs. c. to Wor. c. to EF. c. to Mx. X5370 Hs1/LG16.7.26. SERVOS - PHANTOM AND 20 HP. X8370 With reference to EF7/H15.7.26. We recommend that the pegs on the servo should be made from either…

scan0051 Requesting results of experiments on servo operating gear flexibility for the Phantom and 20 HP models.
View original record To Hs. from DA. X5370 DA2/M12. 8.26. RE. FLEXIBILITY IN SERVO - PHANTOM AND 20 HP. X.7370 X.5370 We are wishing to hear the results of experiments with the steel spring in the servo operating gear,…

scan0052 Use of a rubber disc instead of steel-plate springs for flexibility in the servo mechanism for the 20 HP model.
View original record X5370 BY/TWD c. Hs. BY10/H. 22.11.26. 20 HP. FLEXIBILITY IN SERVO MECHANISM. --------------------------------- The Standardization Sheet which I discussed with you this morning, which is going round…

scan0053 Standardisation of a steel spring adaptation to improve flexibility in the servo device.
View original record RR 755 REVISED (10H) (DE 444 6-10-26) BM. X5370 COMPLETED 24.11.26 STANDARDISATION of CHASSIS PARTS. Date 25.10.26 Description of Parts. FLEXIBILITY IN SERVO DEVICE. Origin. To eliminate servo…

scan0054 Dangerous 'jaggering' issue with the 20 HP chassis servo and a proposed solution.
View original record X5370 BJ. c. Wer. c. Hs. BY16/H. 20.12.26. SERVO JAGGERS. 20 HP. -------------------- We have just standardized a scheme for introducing flexibility into the 20 HP. chassis servo, with the object of…

scan0055 Request to update a standardisation sheet by retaining spring G.52187 and deleting spring G.53165 for a servo device scheme.
View original record To BY. from Hs/GWH. X5370 Hs/GWH1/LG3.3.27. RE. STANDARDISATION SHEET X.5370. FLEXIBILITY IN SERVO DEVICE N.SCH.2196. We find from further tests that it is desirable to retain spring G.52187 for this…

scan0056 Incorrectly standardised servo spring causing poor brake operation, requesting to revert to the old standard spring.
View original record To BY. from Hs/AJL. (5370) Hs/AJL1/LG12.4.27. 40/50 HP. SERVO. X5370 We find that a stronger spring G.74778 separating the servo friction plates, has been standardised in error in conjunction with the…

scan0057 Brake knock on 20 HP cars, recommending a standardised flexible servo operation be fitted to all 20 HP and Phantom models.
View original record To Hs. & BY. from DA. c. to BJ. Wer. Hm. (5370. dal/M25.4.27. BRAKES. X.5420 X.5370 R. has heard of a 20 HP. car which was complained of because of a knock on application of the brakes. It was stated…

scan0058 Unsatisfactory brake servo performance without a spring thrust collar and reports of rough action.
View original record To BJ. from R. c. to OY. Hs. c. to BY. EP. X5370 R 5/M29.4.27. BRAKES. X.8370 X.8420 X.5370 X.5420 It should be thoroughly understood that the present servo is not perfectly satisfactory unless fitted…

scan0059 Suggestion to eliminate a clanking noise emanating from the servo stops.
View original record X5370 To DA. from Hs/Rn. Hs/Rm2/LG7.9.28. We have received a suggestion from the Repair Dept. to stop the sepulchral clank which emanates from the servo stops when the foot is removed from the pedal…

scan0060 Drawing of a rubber buffer applied to a servo balance lever for a 20 HP model.
View original record GHT-81, STOP TO BE SET SO THAT SERVO OPERATING LEVERS JUST REST ON THEIR STOPS WITH RUBBER COMPRESSED, CLIP TO BE PINNED AFTER SETTING., SPRING STEEL, HARD RUBBER PAD, .250" THICK COMPRESSED To .200…

scan0061 Request for detailed drawings of a rubber buffer applied to a servo balance lever for a 20 HP model.
View original record To Hm. from Hs/Rm. X5370 Hs/Rm1/LG1 8.9.28. RUBBER BUFFER APPLIED TO SERVO BALANCE LEVER - 20 HP. X3864 With reference to the attached. Will you please supply us with detailed drawings of this lever…

scan0062 Diagram showing a rubber buffer applied to a servo balance lever for a 20 HP model.
View original record R1966 S4S-R1 1.425 14.5° STOP TO BE SET SO THAT SERVO OPERATING LEVERS JUST REST ON THEIR STOPS WITH RUBBER COMPRESSED CLIP TO BE PINNED AFTER SETTING SPRING STEEL R1961 HARD RUBBER PAD R1963 .250"…

scan0063 Specifications and performance of servos and cams for the Phantom and 20 HP models.
View original record Hs/Rm. from DA. c. to Wor. BY. X5370 DA3/M21.12.28. SERVO. X.5370 X.7370 We thank you for your Hs/Rml/LG18.12.28. We have gone over our figures again, and we have also searched back through the files…

scan0064 Investigation into the cause and potential cures for a clanking noise in the brake mechanism upon pedal release.
View original record R. From Hs/Rm. c. Sg. c. Wor. E. c. Da. By. Oy. X5370 Hs/Rm.5/AD9.10.29. X.7420 X.7370 X.5420 X.5370 CLANKING OF BRAKE MECHANISM. We regularly get complaints about the clank which occurs in the brake…

scan0065 Troubleshooting brake and servo noise by fitting cushioned stops to the front equaliser shaft.
View original record -2- arm does not return to its zero point. We find however, that if we fit a stop to the front equaliser shaft, the trouble which at present occurs when the swinging arm friction increases…

scan0066 Test report on a buffer stop for a servo balance lever, comparing steel plates with rubber blocks to reduce noise.
View original record 2.10.29. TESTS CARRIED OUT WITH BUFFER STOP APPLIED TO SERVO BALANCE LEVER TO SKETCH R:1966 This stop was designed to prevent the clanking of the servo levers when released. The first test proved that…

scan0067 Description of a damper's function within the brake mechanism.
View original record -2- This acts as a damper to all the leverages except the rear brake levers, and is not upset by any wear taking place in the brake mechanism. It not anly quietens the clanking of the servo, but damps…

scan0068 Attached print about a clanking brake mechanism.
View original record X5370. To R. From Hs/Rn. c. to Sg. c. to Da. c. to By. Oy. Hs/Rn4/AD15.10.29. X.7420 X.737 O X.5420 X.5370 For prints see original. CLANKING OF BRAKE MECHANISM. = Please find attached print mentioned…

scan0069 Extract from a quarterly complaints report regarding a lack of flexibility in the 20 HP servo.
View original record X5370 EXTRACT FROM :- Rm. From Hs. c. to AJL. Hs.1/MJ.27.2.30. QUARTERLY COMPLAINTS OF 20 HP.& PHANTOM. (4) 20 HP. SERVO. There are a number of 20 HP. cars out which have no fexibility in the…

scan0070 Internal request to order servo linings for the Phantom II and 20 HP models.
View original record ROY. From Hs/Rm. X5370 Hs/Rm.2/MJ.5.4.30. X.3035 X.7370 X.5370 Will you please order for us - four off G.77775, Phantom ll Servo Lining, and four off G.54030 20 HP. Servo Lining - in Ferodo Bonded…

scan0071 The incorporation of a Ferobesto 'D' bush for the 20 HP 'S' Series servo anchorage.
View original record BY/TWD c. Hs. x5370.. BY2/G.17.4.30. 20 HP. SERVO ANCHORAGE. 'S' SERIES. Please note that we should incorporate as standard the Ferobesto 'D' bush in the clamped end of the swinging arm anchorage.…

scan0072 Raising questions before the finalization of a standardisation sheet for cotton duck brake lining on the 20/25 HP chassis.
View original record Hs. X5370 BY12/G.21.5.30. 20/25 HP. CHASSIS - STANDARDISATION SHEET FOR COTTON DUCK BRAKE LINING. There are certain points which need clearing up before this sheet should be signed and accepted :- 1/-…

scan0073 The use of staples for fixing Cotton-Duck servo linings on a 20 HP chassis.
View original record X5370 To BY. From Hs/Rn. c. to BY/TWD. Hs/Rn.2/MJ.22.5.30. 20 HP. CHASSIS SERVO LININGS. x)370. With reference to BY12/G.21.5.30. The Cotton-Duck was run on the 20 HP. with normal rivets. We agree,…

scan0074 Standardisation report for a cotton duck brake lining for the servo system.
View original record RR 755 REVISED (10H) (DF 637 4-1-29) B.M. 2/5943. X5370 COMPLETED 2.7.30. STANDARDISATION of CHASSIS PARTS. Date 15.4.30. Description of Parts. COTTON DUCK BRAKE LINING FOR SERVO. Origin. To maintain…

scan0075 Brake thumping on the 25 HP car (Japan) and proposing a new paragraph for the instruction book.
View original record COPY. X5370 To R. From Hs/Rm. c. to Sg. c. to Wor. c. to By. c. to Da. c. to E. Hs/Rm.8/MJ.5.9.30. X.5770. X.5360. X.5420. X.5370. ~X.985.~ 25 HP. CAR (JAPAN). BRAKES. With reference to Rl/M20.8.30.…

scan0076 Brake system performance, covering servo lining friction, heat dissipation, and brake drum materials.
View original record -2- Hs/Rm.8/MJ.5.9.30.Contd. constant value for this swinging arm friction and for this reason we are trying a Ferodo lining on the swinging arm bearing. Though there is no doubt that the variation in…

scan0077 Instructing that a servo wick feed modification from the Phantom model be incorporated on the 25 HP model.
View original record J5370. To BY. From Hs. Hs.3/MJ.8.9.30. The modification carried out with the wick feed to the servo on the Phantom should be incorporated on the 25 HP. Hs.

scan0078 The fitting of 35° ball bearing cams to the 25 HP servo.
View original record RHC. from Hs/Rm. x5370 Hs/Rm.7/AD6.10.31. BALL BEARING CAMS ON THE 25 HP. SERVO. We wish to increase the efficiency of the 25 HP. servo. The 45° ball bearing cams run on the last 10,000 mile test…

scan0079 Overoiling of the 25 HP servo fabrics and a proposed solution.
View original record X8370. To By. from Hs/GWH. Hs/GWH.1/KT.20.10.31. RE. 25 HP. SERVO. We have again run into trouble through the overoiling of the servo fabrics by the deletion of the oil catcher and drain holes on the…

scan0080 Standardisation of ball bearing cams for the 40/50 HP and 25 HP servo models.
View original record X5370 To By. from Hs/GWH. Hs/GWH.3/KT.20.10.31. Re. Ball Bearing Cams standardised for 40/50 HP. and 25 HP. for Servo. X7370. X5370. Please note that with the introduction of the above, the bijur…

scan0081 Modifications to the servo for car 18.G.IV.
View original record X5370. To RHC. from Hs/GWH. Hs/GWH.4/KT.20.10.31. RE. SERVO FOR 18.G.IV. We wish to bring in modifications to the servo for the above car. The outer pressure-plate should be G.54487 and shaft of inner…

scan0082 Requesting the production and fitting of standardised ball bearing servo cams.
View original record RHC. from Hs/Rm. Hs/Rm.9/AM.8.11.31. X5370 SERVO CAMS. The babl bearing servo cams are now being standardised and we should therefore get them fitted to all our cars. Will you therefore please arrange…

scan0083 The introduction of ball bearing Cams for the Servo, eliminating the need for an oil feed.
View original record 85370. To By From Hs/CWH. Hs/GWH.2/MA.15. 1. 32. x3806. With the introduction of ball bearing Cams for the Servo, we shall not require the oil feed to them, as at present. In the 10,000 miles tests…

scan0084 Standardisation of chassis parts, specifically ball bearing cams for the servo.
View original record RR 755 (10H) (B459. 24-10-30) 6/3185 ORIGINAL COMPLETED 16.2.32. X5370 STANDARDISATION of CHASSIS PARTS. Date 7.10.31 X No. 5370 Drawing EX. No.6307/8/9/10 & 11 Description of Parts. BALL BEARING CAMS…

scan0085 The introduction of a new part for the 'U' series chassis.
View original record STANDARDISATION OF CHASSIS PARTS. The number of the first chassis on which the new part will be fitted... 'U' series. Date when chassis will be handed to test. .. 2. 5. 32. Cost of scrapped material,…

scan0086 Brake servo failures on the Phantom II and a proposed modification to fix the issue.
View original record X5370. R. from E. E.7/HP.25.5.32. c. Sg. Wor. Hs. By. X7370. re Brake Servo. From time to time we have had complaints of brake servos failing to operate satisfactorily, more particularly on Phantom II…

scan0087 Issue of servo-brake thumps on the 20/25HP car and a proposed solution using a modified dash pot.
View original record X 5370. x5360 R. From Hs/Ltd. c. to Sg. Wor. c. to E. Da. c. to AV. HS/Ltd.2/HA.26.5.32. 20/25HP CAR SERVO-BRAKE THUMPS. On the 20/25HP car it has always been more difficult to cure front brake thumps…

scan0088 Typed memorandum detailing proposed modifications to a brake damper system.
View original record -2- Hs/Lid.2/MA.26.5.32.Cont'd We feel sure that there will be serious brake thump complaints and that we should anticipate them by a modification similar to what we have tried out. The damper itself…

scan0089 Servo brake thumps in a 20/25 HP car, detailing causes and attempted remedies.
View original record X5370 To R. from Hs/Lid. c. to Sg. Mor. c. to E. Da. c. to By. Hs/Lid.1/KT.17.8.32. X5360 20/25 HP. CAR - SERVO BRAKE THUMPS. We attach herewith sketch showing roughly the manner in which the dash pot…

scan0090 Use of a damper on a balance lever to eliminate brake thumps on a Peregrine chassis.
View original record -2- Hs/Lid.1/KT.17.8.32 It appeared to us that the bottom of the balance lever was the obvious place to attach the damper as in this position all front brake movement is damped. We were troubled with…

scan0091 Blueprint of an experimental damper rig designed to cure brake thumps on a 20/25 HP model.
View original record PLATE BOLTED To REAR OF GEAR Box STAY FROM CARRIER PLATE To CLUTCH PIT EXPTL RIG UP OF DAMPER TO CURE BRAKE THUMPS. 20/25 H.P.

scan0092 The unsatisfactory performance of cotton duck servo fabrics on the 20/25 HP model.
View original record Hs. x 5370. Hd/SB7/KW23.8.32. Servo Fabrics - 20/25 HP. ------------------------ As we have previously reported, we find that the Cotton Duck fabrics fitted to 20/25 HP. Servos are not very…

scan0093 Recurring brake servo failure on a 20/25 model and a related propeller shaft query.
View original record [Handwritten Top Center] X5370 [Handwritten Top Right] E.5/HP.5.9.32. [Handwritten Top Right] x4117. [Handwritten Top Right] x8340 To Hs. from E. c. By. Da. re. 20/25 Brake Servo. We had R. through…

scan0094 Test results for various servo linings on the 25 HP model.
View original record X5370. FILES. ------- 7.9 .32. ------- 25 HP. SERVO. ----------- Tests were conducted on various servo linings to ascertain which was the most consistent servo lining, and which had the minimum…

scan0095 Instruction memo regarding fitting new Ferodo R.A.D.13 material to 25 HP servo plates.
View original record x 5370. RHC. From Hs/Les. Hs/Les.3/MA.7.9.32. 25 HP. SERVO. Will you please fit the new Ferodo material R.A.D.13 to the 2 servo plates we supply. As this material is hard we presume it will be…

scan0096 Testing of new moulded servo linings as a replacement for existing cotton duck linings.
View original record x 5370 BY. from Hs/Rm. Hs/Rm.6/KT.9.9.32. x 7370 x 5370 x 719. SERVO LININGS. We have tried fitting the Selvedge edge cotton duck linings to servos in the Expl. Dept, and are not at all satisfied with…

scan0097 Servo-assisted braking systems, material choices, performance consistency with temperature, and comparisons to other brake types.
View original record HS. E. } FROM R. DA. BY. } X5370. R7/M14.9.32. C. to SG. WOR. PN. EP. SERVOS. X7370 I pointed out to HS., E., and RM., that we must not be too ambitious about getting the servo consistent and…

scan0098 Calculations for servo end pressure for the Peregrine and 20/25 HP models.
View original record x5370. FILES. SERVO. 15.9.32. x4027. Peregrine. End pressure on servo = (13.150 / 5.250) X (1.425 / 1.425) X (1.625 / .515) P. = 7.9. P. 20/25 HP. End pressure on servo = (13.1 / 4.350) X (1.187 /…

scan0099 Investigation into the failures of servo fabrics identifying faulty indents and incorrect tooling.
View original record X 5370. To Hd. from Hs/GWH. c. to Wor. Hs/GWH.8/KT.20.9.32. RE. FAILURES OF SERVO FABRICS. X7370. I have just paid a visit to Cricklewood to investigate the above trouble. It was not possible to trace…

scan0100 Request to fit one set of servo linings Rad.13 to a test bed gearbox for a 20/25 Servo.
View original record X5370 RHC. From Hs/Rm. Hs/Rm.2/MA.24.9.32. 20/25 SERVO. Will you please fit one set of servo linings Rad.13 to test bed gearbox. Hs/Rm.

scan0101 New servo lining sample, including its specifications and recommendations for use.
View original record X5370. By. from Hs/Rm. Hs/Rm.3/KT.10.10.32. x719. x7370. We are issuing a standardisation sheet for the new servo lining sample of which you have already. It is called Fereodo RAD.13, and the Ferodo…

scan0102 Request to the Gearbox Department for the loan of two sets of 20/25 servo cams to the Experimental Department for testing.
View original record X5370. Mr. Norman ( Gearbox Dept). Hs/TS.9/KT.10.10.32. 20/25 SERVO. Will you please loan to the Expl. Dept 2 sets of servo cams for test purposes. & oblige. Hs/Rm.

scan0103 Issues affecting servo efficiency found during the dismantling of a chassis.
View original record Mx. from Hs/GWH. BY. Sft. X5370 Hs/GWH.3/KT.13.10.32. x7370 Re. SERVO EFFICIENCY. It is interesting to note that during the dismantling of the servo on Chassis N.141 just delivered from the works to…

scan0104 From 'R.' discussing a previously designed servo system with freewheels and its patent implications relative to existing patents.
View original record HDY. } FROM R. BY. } HS. } x5370 C. to SG. WOR. RG. E. re SERVOS. Y R4/M7.11.32. x7370 x728 Some years ago I schemed a system whereby the servo was turned in one direction whichever way the car moved.…

scan0105 Standardisation of a new type of lining for the 20/25 & 20/50 chassis models.
View original record RR 788 (10H) (50408, 21-4-32) BM. 3/8382/4. COMPLETED 10.11.32. XS329 STANDARDISATION of CHASSIS PARTS. Date 10.10.32 X No. X.719 X.5370 X.7370 Drawing No. Part List Description of Parts. NEW TYPE OF…

scan0106 Form for standardising chassis parts, detailing the introduction of a new part for testing.
View original record STANDARDISATION OF CHASSIS PARTS Description of Part Origin Experimental Test Report The number of the first chassis on which the new part will be fitted...... When available Date when chassis will be…

scan0107 Outlining three suggestions for arranging a servo to only operate in a forward direction, regardless of the car's direction of travel.
View original record x5370 BY. FROM DA. DA7/M16.11.32. C. to SG. WOR. HS. E. SERVOS. x7370. We send herewith N.sch.3602. shewing 3 suggestions for arranging a servo so that it will only go in a forward direction whichever…

scan0108 Modifications to Ferodo Servo linings and sending drawings.
View original record X 5370 By. From Hs/Gry. Hs/Gry.5/MA.22.11.32. SERVO FABRICS 40/50 AND 20/25. X.7370. X.5370. X.719. With regard to your discussion with Mx. about increasing the width of the dents in the Ferodo Servo…

scan0109 Confirming arrangements for inspecting a 20/25 HP chassis with a reported slipping clutch.
View original record N-W. Mr. Rowbotham c. to Wor. c. to C. 85370 Br7/H.25.1.33. re Technical - Slipping Clutches on 20/25 H.P. Chassis (Synchro-mesh type) This confirms my telephone conversation with you this morning,…

scan0110 Recommendation to adopt a .010' diametral clearance on servo driving pins to prevent binding.
View original record X 5370 BY. from Hs/Rn. c. to RHC. Hs/Rn.19/KT. 25.1.33. X4027. X5370. X7370. SERVO DRIVING PINS. We proved out on the last 10,000 miles on Peregrine that there was no detriment in having .010"…

scan0111 The use of an oil dashpot on the 25HP and Bensport servo brake linkage.
View original record B/. FROM DA. C. to SG. WDR. HS. E. HDY. X5370- DA1/M25.4.33. 25HP. (AND BENSPORT) SERVO. Referring to DA1/M25.3.33. we now send you the original of N. sch. 3709. - Oil Dashpot on 25HP. Servo Brake…

scan0112 Requesting modification to the drawings for the 20/25 & Bensport Servo GL. 609.
View original record [handwritten] Xr S J o To BY. from Hs/Gry. Hs/Gry.1/KT. 21.7.33. 20/25 & BENSPORT SERVO GL. 609. We find that details for this servo were sent to us in BY/TWD7/E.3.3.33. Our idea for Bensport now is…

scan0113 Scheme showing modifications to the Servo Motor to prevent spreading of Cotton Friction Lining.
View original record COPY. X 630 To RHC. c. Ws/TB. c. Hs/Gry. BY/TWD2/E.24.7.33. 20/25 HP. & BENSPORT. SERVO MOTOR MECHANISM. SECTION 6180. G.L.609. Scheme showing modifications to Servo Motor to prevent spreading of…

scan0114 Requesting a modified servo and a dashpot for a new scheme.
View original record To RHC. from Hs/Gry. c. BY/Cgh. X53TD Hs/Gry.4/KT.1.8.33. SERVOS. This is to ask you to let us have, as soon as possible, the servo to GL.609 with modifications to BY/VP.2/E.29.7.33. We have not now…

scan0115 Change from a press fit to a sliding fit for the outer ring on servo cams.
View original record COPY. X5370 To By. from Hs/Gry. Hs/Gry.6/KT.1.9.33. r2ph SERVO CAMS - 20/25 & BENSPORT. Further to our conversation about the finish of the inclined faces of the servo cams, we suggest that the outer…

scan0116 Potential deletion of the lubrication scheme for the 20/25 HP Servo.
View original record Wor. c. Hs. X 370 BY.9/G.2.10.33. 20/25 HP. SERVO. Referring to Hs/Gry.10/KT.27.9.33. although as Hs/Gry. correctly points out I signed the standardisation sheet, further reflection made me realise…

scan0117 Cost-saving modification to the servo lubrication system, replacing Bijur lubrication with manual hand lubrication.
View original record Wor: XS370. Hs.8/KT.4.10.33. With reference to the attached. Our standardisation sheet was issued for the deletion of the lubrication to the servo, which should have meant a reduction in cost. By.…

scan0118 Removal of the Bijur lubrication system from the 20/25 HP servo due to inefficiency.
View original record X5370 To By. from Hs. c. Wor. Mx. c. Hd. Hs.7/KT.4.10.33. 20/25 HP. SERVO. Replying to BY.9/G.2.10.33. We are strongly in favour of cutting off the Bijur lubrication entirely from the servo, and…

scan0119 Quarterly complaints and a standardisation for the 20/25 servo, recommending an immediate production modification.
View original record X5370 To Wor. from Hs/Gry. c. E. Da. c. By. Hd. c. MX. Hs/Gry.10/KT.27.9.33 20/25 SERVO - QUARTERLY COMPLAINTS. The standardisation sheet for deletion of the oil to the servo has been signed by…

scan0120 Asking for a recommendation on the 20/25 HP Servo following a conference in Derby.
View original record Hs. from Wor. x 123/0 Wor2/R.4.10.33. 20/25 H.P. SERVO. Re Hs/Gry.10/KT.27.9.33. & Item 2 of Minutes of Conference held at Derby on Thursday afternoon, September 21st, (copy of which Rm. has) and…

scan0121 The decision to revert to a hand oiling hole for the 20/25 HP Servo, discontinuing the Bijur oiling system.
View original record To Wor. From Hs. Y-370. Hs.5/MJ.11.10.33. 20/25 HP. SERVO. Replying to Wor.2/R.4.10.33. We have arranged with By. that we shall adopt the last suggestion in his memo By.9/G.2.10.33 and that is, to cut…

scan0122 Instructing to use Ferodo S.3914 material for the linings of fully floating servos.
View original record X5370 To RHC. from Hs/Gry. Hs/Gry.4/KT.16.10.33. FULLY FLOATING SERVO TO CL.609. Will you please see that the linings of these servos are Ferodo S.3914. We have ordered a dozen discs of this material…

scan0123 Servo jaggering issue on the 20/25 HP chassis, referencing clearances and previous instructions.
View original record Hs. C. E. GRY x 370. EP2/MH.19.10.33 re 20/25 HP SERVO ADJUSTMENT With reference to Depot Sheet No.250, and referring to Hs/Gry4/KT22.9.33, we find that since the fixing of the washer referred to on…

scan0124 Standardisation document regarding the deletion of Bijur lubrication to the servo on 20/25 HP chassis.
View original record RR 755 (10M) (37133. 28-10-32) BM. 3/9064/1. K5370. COMPLETED 1.11.33. STANDARDISATION of CHASSIS PARTS. Date 17.7.33. Description of Parts. DELETION OF BIJUR LUBRICATION TO SERVO. X No. 3806. Drawing…

scan0125 Standardisation form for chassis parts detailing implementation and costs.
View original record STANDARDISATION OF CHASSIS PARTS The number of the first chassis on which the new part will be fitted................. When available. Date when chassis will be handed to test. --- Cost of scrapped…

scan0126 Modification to the 25 HP and Bentley Servo concerning the enclosure of liner discs.
View original record TS370 To DY. from Da. Da.2/HP.13.11.33. c. for E. Hs. 25 HP. and Bentley Servo. Herewith is N. Sch. 3878 showing a modification suggested to CL.609, so that the liner discs are completely enclosed in…

scan0127 Mistake in standardising the increased front braking for 25 HP cars and the proposed solution.
View original record X370 To Hs. From Hs. C. to Wor. C. to H. C. to Ps. C. to Hy. C. to Ph. C. to Kl. C. to ex. C. to Sft. Hs.R/SJ.18.11.33. KE860 Re. 25 HP. BRAKES. We find that we have made a mistake in Standardising…

scan0128 Standardisation of baffles to prevent oil working along the servo countershaft.
View original record RR 755A (5H) (S2674, 16-10-33) BM. S/262/6. X5370 COMPLETED 7.12.33. 20/25 STANDARDISATION of PARTS. Date 4.11.33 X No. 5370. Drawing No. Part List Description of Parts. BAFFLES TO PREVENT OIL WORKING…

scan0129 Use of ball versus needle bearings for the servo shaft on 20/25 and Bentley cars.
View original record COPY. X5370 To BY. from Da. Da.2/HP.2.1.34. c. Wor. E. Hs. HDY. RHC. 20/25 and Bentley Servo. ------------------------- Herewith are N. Sch's 3927 and 3928. The former shows the application of a ball…

scan0130 Request to construct a servo output measuring rig for 20/25 and Bentley models.
View original record COPY. X 5370 RHC/HPS. From Hs/FJH. Hs/FJH.1/MA.10.2.34. 20/25 AND BENTLEY SERVO TESTS. Will you please construct the servo output measuring Rig shown on the attached print Hs.1303. We will supply you…

scan0131 Modifications to servos on 20/25 and Bentley models, regarding driving pins and lining materials.
View original record To By. X 5370 Hs/Gry.17/KW.1.3.34. Servos - 20/25 and Bentley. We want to be able to do away with the driving pins on the ordinary type servo as well as on the direct to all four wheels servo. We…

scan0132 Parts list and blueprint notification for the servo motor and mechanism of a 20/25-HP & Bentley standard type servo.
View original record 45370 To: [struck through] c: Hs/Gry; From: [struck through] BY/TWD1/E:17:3:34: 20/25-HP. & BENTLEY STANDARD TYPE SERVO. SERVO MOTOR & MECHANISM SECTION 6180. G:L:713. Torsional Connection of Servo…

scan0133 Parts list detailing replacements, additions, and exceptions for a specific unit assembly.
View original record (Cont'd): - 2 - BY/TWD1/E:17.3.34: Together with the following Standard parts :- K.1922: 2:BA: Cheese Head Screw: 2 off per set: K.4307: 2:BA: Lock Nut: 2 " " " K.9006: 2:BA: Spring Washer: 2 " " "…

scan0134 Tests to determine the equal distribution of the 20/25 and Bentley servo motor output to the front and back brakes.
View original record x5370 26.3.34. 20/25 AND BENTLEY SERVO TESTS. We have recently carried out some tests to determine whether the 20/25 and Bentley Servo Motor output was equally distributed to the back and front brake…

scan0135 Analysis of servo output distribution, the effects of friction at various bearings, and the impact of mechanism geometry in forward and reverse gears.
View original record -2- It can be seen that there is a considerable difference between the front and back outputs but that it is in the direction opposite to that which was anticipated. The low rating spring balance was…

scan0136 Diagram for servo tests on the 20/25 and Bentley models.
View original record HS 1349 20/25 AND BENTLEY SERVO TESTS A B C E F D REAR SPRING BALANCE FRONT SPRING BALANCE ROLLS-ROYCE, LTD PRINT ROOM 19 APR 1934 DERBY H.H. 26/3/34

scan0137 Graph charting the distribution of servo output to the front and rear brakes for 20/25 and Bentley models.
View original record B.V. 26. 20/25 AND BENTLEY SERVO TESTS DISTRIBUTION OF SERVO OUTPUT TO FRONT AND REAR BRAKES (1) HIGH RATING REAR BALANCE LOW RATING FRONT BALANCE (2) LOW RATING REAR BALANCE HIGH RATING FRONT BALANCE…

scan0138 Request to manufacture one Gearbox Rear Coupling extension for 20/25 Servo Tests.
View original record X5370 To RHC. Hs/FJH.4/KW.4.5.34. 20/25 Servo Tests. Will you please make 1 Gearbox Rear Coupling extension to BV.27 attached as soon as possible. Hs/F.J.Hardy.

scan0139 Instruction to reline servos on cars 21-G-IV and 4-B-IV with 'roasted' RAD-13 linings.
View original record x 5370 To RHC. Hs/Gry.5/KW.26.6.34. Servo Linings 21-G-IV & 4-B-IV. Before these cars go to France will you please reline the servos with "roasted" RAD-13 linings supplied by Hs/FJH. Hs/Gry.

scan0140 Request for different cast iron servo linings for 25 HP servo tests.
View original record X5370 TO RHC. Hs/FJH.12/KW.12.7.34. 25 HP. Servo Tests. We wish to try some servo linings of cast iron. Will you please supply us with 4 linings to Hs.1462 in the standard cast iron Spec. 212A and 4…

scan0141 Requesting different cast-iron servo linings for 25 HP servo tests.
View original record To RHC. X 5370 Hs/FJH.18/KW.17.7.34. 25 HP. Servo Tests. We wish to try some servo linings of cast-iron. Will you please supply us with 4 linings to Hs.1462 in the standard cast-iron, Spec.212A, and 4…

scan0142 Request to supply and fit parts for 25 HP servo experiments, specifically to incorporate an outboard ball bearing.
View original record X5370 To RHC. Hs/FJH.5/KW.19.7.34. 25 HP. Servo Experiments. The Servo Motor which we are now using for the servo experiments is to N.S.3971 - CL. 713, fully floating with torsional connection of…

scan0143 Request to make two cork-inserted plates for trials on the servo test rig.
View original record X 5370 To RHC. c. to Hs/FJH. Hs/Gry.3/KW.20.7.34. Servo Tests. We want to try along with other linings a pair of cork inserted plates on the servo test rig. Will you therefore please make two plates…

scan0144 The mechanical efficiency of a Bentley and 25 HP servo motor and its linings.
View original record X537D EXPERIMENTAL DEPARTMENT REPORT REFERENCE :- Ha/PJH.7/KW.26.10.34. Subject of Report :- Mechanical Efficiency of Bentley and 25 HP. Servo Motor and efficiency of Dervo Linings. General…

scan0145 Servo efficiency tests, focusing on the effect of temperature on brake lining friction and the search for better materials.
View original record HS/FJH/7/KW.26.10.34. Servo Efficiency Tests. We are carrying out a large number of experiments on the Bentley and 20/25 HP. servo to determine the mechanical efficiency and the effect of temperature…

scan0146 Braking system tests, discussing servo types, lining characteristics, and mechanical efficiency.
View original record -2- Hs/FJH. 7/KW.26.10.34. This shows the advantage of having the linings fully floating. However, we suspect that fully floating servos are more inclined to squeak than the old type in which the…

scan0147 Test report comparing the performance of different servo lining materials.
View original record -3- Hs/PJH. 7/KW. 26.10.34. SERVO LINING TESTS. Type of Servo Lining. | Average /u when cold | Decrease in /u when hot per cent | Remarks. Ferodo RAD.13 | 0.44 | 47 | Present standard. Long life.…

scan0148 Comparative table of performance characteristics for various servo lining materials.
View original record -4- Hs/FJH.7/KW.26.10.34. | Type of Servo Lining. | Average µ when cold | Decrease in µ when hot per cent | Remarks. | |---|---|---|---| | Cast Iron | - | - | "Picks up" immediately. | | Mintex Rubber…

scan0149 Graph plotting the coefficient of friction against temperature for Ferodo RAD 13 friction material.
View original record FERODO RAD 13 FRICTION MATERIAL VARIATION OF FRICTION WITH TEMPERATURE FIGURES TAKEN ON 25 HP SERVO MOTOR DRUM SPEED 44 r.p.m. END LOAD 790 lbs. COEFF. OF FRICTION TEMPERATURE °F 3rd Run 1st Run 2nd…

scan0150 Graph showing the variation of friction with temperature for Ferodo V.M. 30 friction material.
View original record FERODO V.M. 30 FRICTION MATERIAL VARIATION OF FRICTION WITH TEMPERATURE FIGURES TAKEN ON 25 H.P. SERVO MOTOR DRUM SPEED 44 R.P.M. END LOAD 700 LBS COEFF. OF FRICTION TEMPERATURE °F 1ST RUN 2ND RUN 5TH…

scan0151 Graph of hysteresis loops for a Bentley Servo Motor, comparing different connection and bearing setups.
View original record HYSTERESIS LOOPS - BENTLEY SERVO MOTOR H.S.1573. FIGURES TAKEN ON :- 3 PIN CONNECTION AND PLAIN BEARING TO G.54808 SPRING RING TORSIONAL CONNECTION TO GL 713 BALL BEARING BRIDGE TO NSCH 3927 45° SERVO…

scan0152 Results of servo efficiency tests and suggesting further material trials.
View original record X5370 To Hs. from E. c. Wor. By. Da. Hdy. E.6/HP.29.10.34. re Servo Efficiency Tests. Referring to Hs/FJH.7/KW.26.10.34, the results given in this report are very useful and illuminating and show the…

scan0153 Trouble with the Bentley and 25 HP servo and proposing a modification to make it run cooler.
View original record 25370 To RHC. Hs/FJH.13/KW.2.11.34. Bentley and 25 HP. Servo. We are having a considerable amount of trouble in the Bentley servo due to the coefficient of friction of the lining materials falling…

scan0154 The standardisation of fully floating servos for Bentley and 20/25 models.
View original record x5370 To By: Hs/Gry.19/KW.2.11.34. Fully Floating Servos. The Standardisation Sheet for Fully Floating Servos on the Bentley should have included the ball bearing bridge to N.Sch.3927. This feature…

scan0155 General specification for the servo on chassis 21-G-IV.
View original record X5370 14.11.34 Servo on Chassis 21-G-IV. General specification of servo as follows :- (1) Ball Bearing Servo Bridge to N.Sch.3927. (2) Spring Ring Torsional Connection to GL.713 with one Spring Ring…

scan0156 Experimental Department Report on the efficiency of servo cams and reducing journal friction.
View original record EXPERIMENTAL DEPARTMENT REPORT REFERENCE :- Hs/FJH.14/KW.15.11.34. Subject of Report :- Efficiency of Servo cams. General Conclusions :- The journal friction of the cams is considerable and should be…

scan0157 Test report on servo cam efficiency, comparing the standard 25 HP cams with a modified version to assess the effect of journal friction.
View original record Hs/WJH.14/KW.15.11.34. Servo Cam Efficiency. We have carried out a test on our 25 HP. servo rig to determine the effect of journal friction in the cams. The test consisted of a comparison of the…

scan0158 Graph showing hysteresis loops and comparing the efficiency of standard and floating cams for a Bentley servo motor.
View original record HYSTERESIS LOOPS - BENTLEY SERVO MOTOR COMPARISON OF STANDARD AND FLOATING CAMS. FIGURES TAKEN ON SERVO INCORPORATING :- 1. SPRING RING TORSIONAL CONNECTION TO GL.713. 2. BALL BEARING BRIDGE TO N.SCH.…

scan0159 Tests and modification requests for servo operating cams on Bentley & 25 HP models.
View original record 25370 To RHC. Hs/FJH.2/KW. 28.11.34. Servo Operating Cams - Bentley & 25 HP. We have carried out tests which have shown us that there is considerable journal friction in the Bentley and 25 HP. Servo…

scan0160 Experimental department report regarding a ball bearing for a brake system servo motor.
View original record X5370 EXPERIMENTAL DEPARTMENT ' REPORT REFERENCE :- Hs/FJR.10/KW.19.12.34. Subject of Report :- Ball Bearing Supporting Inner Pressure Plate on Brake System Servo Motor. General Conclusions :- From…

scan0161 Experiments comparing a special bearing with an ordinary ball bearing in servo motors.
View original record Hs/PJH.10/KW.19.12.34 Servo Experiments. On all the R.R. Servo Motors the ball bearing which supports the inner pressure plate in the main shaft is at present a special bearing with intentionally…

scan0162 Graph plotting the hysteresis of a Bentley & 25 HP servo, comparing special and ordinary ball bearings supporting the inner pressure plate.
View original record HS 1661 HYSTERESIS OF BENTLEY & 25 H.P. SERVO COMPARISON OF SPECIAL & ORDINARY BALL BEARINGS SUPPORTING INNER PRESSURE PLATE CONDITIONS OF TEST 1. SPRING RING TORSIONAL CONNECTION 2. BALL BEARING…

scan0163 Requesting the manufacture of two additional pairs of servo cams for the Bentley & 25 HP.
View original record x5370 To RHC. Hs/FJH.21/KW.2.1.35. Bentley & 25 HP. Servo Cams. In addition to the four pairs of modified servo cams to Hs.1631 which we instructed in our memo. Hs/FJH.2/KW.28.11.34, will you please…

scan0164 Inconsistency in servo swinging arm poundage, proposing to replace Ferodo linings with oily cotton duck.
View original record To RHC. c. to Hs/Wym. x5370 Hs/Gry.5/KW.2.1.35. Servo Swinging Arm. We have found that inconsistency in swinging arm poundage is due to oil getting on the surfaces of the Ferodo linings. We want to…

scan0165 Requesting the fitting of servo motors to specific Bentley and 25 HP chassis for testing purposes.
View original record 45370 To RHC. Hs/FJH.17/KW.15.1.35. 25 HP. and Bentley Servo Motors. We wish to obtain as much running experience as possible on the type of Servo that you are at present making for 5-B-IV. Will you…

scan0166 Deletion of a crinkly plate modification for the 20/25 servo following test failures.
View original record To By. c. to Wor. c. to E. /5370 Hs/Rm.6/KW.15.2.35. 20/25 Servo. We recently issued a Standardisation Sheet, X.No.5370, for various improvements on the 20/25 servo, amongst which was the crinkly…

scan0167 Standardisation of parts for a servo motor, incorporating a ball bridge bearing, fully floating linings, and a spring ring torsional connection.
View original record RR 755A (SH) (57312. 29.12.33) BM 3/640/2 X.541 COMPLETED 29.3.35. 20/25 STANDARDISATION of PARTS. Date 15.1.35. (Handwritten: 18-3-35) X No. 5370. Drawing No. Part List Description of Parts. SERVO…

scan0168 Cost estimation for extra jigs, tools, and equipment with a cost comparison between an old and new part.
View original record Est. cost of extra jigs, tools and equipment (Sft/WS 9-11-34 & Sft/WS 8-2-35) £62-0-0 Could be brought on to production at 1st chassis in 'J' series, (Sft/GH. 8.2.35) without scrap. Material Labour…

scan0169 Requesting the adaptation of a new friction method from a Bentley servo to the 25 HP servo suspension bracket.
View original record To RHC. X541 Hs/FJH.17/KW.5.4.35. 25 HP. Servo Suspension Bracket. N.Sch.4406, which was issued recently but has not yet been detailed, shows a new method of applying friction to the suspension…

scan0170 Use of a Bentley servo suspension bracket on the 25 HP model.
View original record To RHC. x 541 Hs/FJH. 23/KW. 8.4.35. 25 HP. Servo Suspension Bracket. Re our memo. Hs/FJH.17/KW.5.4.35 concerning the adaption of N.Sch.4406 to the 25 HP. servo. The Design Dept. have pointed out that…

scan0171 Application of a Bentley disc type friction device to the 20/25 model's balance arm.
View original record Rm L541 HDY.1/MN.16.4.35. TO DY. Copy to Mr H. Hs. Dep. RHC. --------------------- 20/25 Servo Friction for Balance Arm. N.Sch.4453 herewith shows the Bentley disc type friction device applied to the…

scan0172 Rectifying servo squeaks and judder on a 20/25 model.
View original record To SG. c. to JLE. c. to EP. c. to LA. 4841 Hs/Gry.3/KW.20.5.35. 20/25 Servo Squeaks. During a short run we had on your car on the Barnett by-pass it was obvious that a bad servo squeak was present and…

scan0173 Two faults with floating servo-cams on 25 HP and Bentley models, with a request for design alterations.
View original record To RHC. c. to Hs/Std. KSH Hs/PJH.19/KW.3.7.35. Servo-Cams for 25 HP. and Bentley. The floating servo cams fitted to 5-B-IV on its last test in France have shown up two faults. The first is that the…

scan0174 The performance of cotton duck fabric liners fitted to a servo balance arm after testing.
View original record To Hs/Rm. Hs/WB.1/KW.5.7.35. Fabric Liners on Servo Balance Arm. 20-G-IV has now completed 8580 miles with cotton duck liners fitted to the servo swinging arm (N.Sch.4314). It was necessary during the…

scan0175 Issues with splined servo linings for Spectre, Bentley & 25 HP models.
View original record To RHC, 4541 Hs/FJH. 7/KW. 6.7.35. Spectre, Bentley & 25 HP. Servos with Splined Linings. We noticed recently that on 21-G-IV servo the linings had been filed on the outside dia. and on the width of…

scan0176 Six 'Safeguard' friction linings from Gandy Belting Co. to be tested on a 20/25 HP servo motor.
View original record Hs. +541 BY/Cgh.11/G.19.8.35. 20/25 HP. CHASSIS - SERVO. ------------------------- We hand you herewith six "Safeguard" friction linings which have been supplied to us by the Gandy Belting Co. to suit…

scan0177 The fitting of a servo to a 25/30 HP Chassis, 22-G-V.
View original record To RHC. +541 Hs/FJH.15/KW.1.1.36. Servo for the new 25/30 HP. Chassis 22-G-V. Will you please fit to the above chassis a servo to the following specification :- (1) Latest experimental splined lining…

scan0178 Proposals for a Servo on a 25-30 HP vehicle, covering bolt clearance and the brake pedal stop.
View original record X541 Hdy. RHC. Rm E/HDY.4/HP.15.1.36. c. Hs/Rm. Servo for 25-30 HP. 22-C-V. We return herewith your copy of Hs/FJH.15/KW. 1.1.36 which you sent to us for our remarks. We are in agreement with the…

scan0179 Requesting the replacement of rivets with bolts on the servo for 25/30 and Bentley models following failures on experimental cars.
View original record MARTINDALE X541 C. TWEEDALE. RHC. Hs/Fm. E/HDY.3/HP.3.4.36. Servo - 25/30 and Bentley. Will you kindly instruct that the rivets which are at present used to secure together the two levers of the…

scan0180 Requesting the replacement of rivets with bolts on the servo balance lever for 25/30 and Bentley models.
View original record X541 MARTINDALE [Signature] c.c. Mess.RHC, HS/JW [Strikethrough] E/HDY.3/HP.5.4.36. Servo - 25/30 and Bentley. Will you kindly instruct that the rivets which are at present used to secure together the…

scan0181 Potential cure for servo judders on the 20/25 model by removing a washer.
View original record PER BAG. Y541 Br.(Cricklewood). From Hs/Gry. Hs/Gry.2/MJ.14.8.36. 20/25 SERVO JUDDERS. We know of one or two cases in this department and on customers' cars in which servo judders have been cured by…

scan0182 Follow-up communication requesting a reply regarding an issue with the 20/25 Servo Judder.
View original record X541 W/N - Br. Hs/Gry.25/KW.18.8.36. 20/25 Servo Judders. We have not yet received a reply to our Hs/Gry.2/MJ14.8.36 on the above subject, and should be glad to have this as soon as possible. Hs/Gry.

scan0183 Communication regarding the issue of servo judders on the 25 HP model.
View original record N-W Hs/Gry. Gry x541 Br6/S. 18.8.36 re Technical - 25 H.P. Servo Judders ----------------- With reference to your Hs/Gry2/MJ14.8.36, we at N have never removed the washer referred to for the purpose…

scan0184 Shearing of rivets on the 25/30 HP & Bentley Servo balance lever, recommending immediate replacement with bolts.
View original record X541 To By. c. to E. c. to Da. c. to Hdy. c. to Mx. HS/FJH.20/KW.10.9.36. 25/30 HP. & Bentley Servo. The Test Dept. have recently experienced a case of shearing of the rivets on the servo balance…

scan0185 List of new and replaced parts for fitting a Disc Type Damper to a 20/25-HP chassis.
View original record 25 HP Servo file. 541 To. Rm/HDY. BY/TWD5/E.10.12.36. 20/25-HP. CHASSIS. GEAR BOX & ACTUATING GEAR. SECTION 6030. REAR BRAKE EQUAL. GEAR. (FOOT). SECTION 6150. FRONT BRAKE EQUALISER. SECTION 6151.…

scan0186 Parts list from Section 6180 detailing new, additional, and replaced/not required components.
View original record (Cont'd). -2- BY/TWD5/E.10.12.36. New Parts. Sec.6180. Replaced Parts. G.84832. Stud. Friction Plates. 1 off. Additional. G.83171. Friction Plate. Outer. 1 " " G.84821. Spring. Demper. 1 " " E.6788.…

scan0187 List of new and replaced parts for a 20/25 HP chassis to fit Disc Type Dampers.
View original record To. Rm/HDY. BY/TWD5/E.10.12.36. 20/25-HP. CHASSIS. GEAR BOX & ACTUATING GEAR. SECTION 6030. REAR BRAKE EQUAL. GEAR. (FOOT). SECTION 6150. FRONT BRAKE EQUALISER. SECTION 6151. SERVO COUNTERSHAFT.…

scan0188 Continued list of new and replaced parts with corresponding part numbers and quantities.
View original record (Cont'd). -2- BY/TWD5/E.10.12.36. New Parts. Replaced Parts. Sec.6180. G.84832. Stud. Friction Plates. 1 off. Additional. G.83171. Friction Plate. Outer. 1 " " G.84821. Spring. Damper. 1 " " E.6788.…

scan0189 Confirming an increase in factory cost for the Disc Type Damper for the Servo Suspension Bracket.
View original record 551 To Rm. from G/Rb. G/Rb.20/71/M/W.161236. ------------------------- Disc Type Damper for Servo Suspension Bracket 25/30HP. - Sec.6180. ------------------------- In reply to your Mr. Hardy's enquiry…

scan0190 Standardisation of servo linings for the Bentley and 25/30 chassis, and renaming the Ferodo material.
View original record 241 To Ry. c. to Roy. Rm/FJH.1/JH.24.12.36. Bentley and 25/30 Servo. We have recently standardised on the above chassis servos with linings to G.57162 in Ferodo R.A.P. 13 material and secured by keys.…

scan0191 The standardisation of servo motor mechanism features for the 25/30 and Bentley models.
View original record γ 541. To HPS. from Rm/FJH. Rm/FJH.13/AP.11.1.37. SERVO MOTOR MECHANISM. Re your HPS.7/VS.8.1.37. We have already standardised in both 25/30 and Bentley all the features covered by the prints which…

scan0192 Standardisation of a servo with specific linings and connections for the 25/30 HP model.
View original record RR 755A (5H) 20306 21/7/36 J.W.S. COMPLETED 22.2.37. 25/30 H.P. STANDARDISATION OF PARTS Date 10/2/37 (Date 27.11.36 is crossed out) X No. 541. Drawing No. Part List Description of Parts. SERVO WITH…

scan0193 Estimated cost for new tools and a production timeline for the R2 series chassis.
View original record 30 H.P. STANDARDISATION PART (Reversed Stamp) Estimated cost of New Tools ........ £37. 0. 0. Could be brought on to production at the 1st. chassis in R2. series (without scrap).

scan0194 Standardisation of a Dics type damper on servo suspension bracket for the 25/30 HP model.
View original record RR. 755A (5H) 20396 21/7/36 J.W.S. COMPLETED 15.3.37. 25/30 H.P. STANDARDISATION of PARTS Date 22.12.36. X No. 551.241 Drawing No. N.Sch. Part List 4406/4457 *Description of Parts. DICS TYPE DAMPER ON…

scan0195 Estimated cost of new tools included under Bentley Standardisation Sheet X. No. 251.
View original record STANDARDISATION PARTS Estimated cost of new tools included under Bentley Standardisation Sheet X. No. 251. Could be brought on to production at the 1st chassis in R2 Series (without scrap) 509./

scan0196 Standardisation of parts for servo improvements on the 25/30 HP model.
View original record RR 755A (5H) 20396 21/7/36 J.W.S. COMPLETED 18.3.37. 25/30 H.P. STANDARDISATION of PARTS Date 10.3.37 (Crossed out: 19.11.36) Description of Parts. Servo improvements as on attached sheet. X No. 541.…

scan0197 Estimation for the cost of new tools and their production implementation for the 'R' Series chassis.
View original record Estimated Cost of New Tools £15. 0. 0. Could be brought on to production at the 101st chassis in "R" Series (without scrap)

scan0198 Instructing the removal of a servo motor from one car and its refitting to another car.
View original record 541 HPS. from Rm/AFM. Rm/AFM1/R.25.3.37. 22.G.IV. SERVO. Will you please remove the servo motor from this car, and replace it with a standard one. The servo taken off is to be fitted to Raymond May's…

scan0199 Confirming the replacement of the servo on car 22.G.V.
View original record To HPS. from Rm/FJH. 541 Rm/FJH.11/AP.1.4.37 22.G.V. SERVO The servo of the above car has been removed for use on a customer's car. This memo is to confirm that we wish it to be replaced by the…

scan0200 Requesting two pairs of 35° Servo Cams for 25/30 HP cars to be sent to Paris.
View original record To Hd. from Rm/AFM. c. Sr. (Paris). 8 541 Rm/AFM.1/MH.23.11.37. 25/30 HP. 35° SERVO CAMS. Will you please send out to Sr, Paris Depôt, two pairs of 35° Servo cams as now fitted to 25/30 H.P. cars, and…

scan0201 Testing alternative, cheaper materials for the servo drive worm wheel on Bentley & 25/30.HP models.
View original record To HPS. from Rm/AFM. 541 Rm/AFM.10/AP.13.12.37. SERVO DRIVE - BENTLEY & 25/30.HP. The worm wheel G.54654 is made of phosphor bronze which costs us 3.3 shillings per wheel. As the duty this worm wheel…

scan0202 Complaint regarding inefficient servos on B.II & 25/30 HP models and a recommended fix.
View original record 541 also 2H To Hd. from Rm/AFM. (FOR DEPOT SHEET) Rm/AFM.6/MH.27.10.38. COMPLAINT - INEFFICIENT SERVO - B.II & 25/30 HP. Paris say they have a number of complaints of inefficient servos on Bentleys…

scan0203 Arguing against the reduction of the vehicle tool kit, emphasizing the necessity of special tools.
View original record To EWT. from Hs. c. to BY. c. to Mx. c. to Hm. c. to EP. X5580 Hs1/LG17.12.26. TOOLS AND SPARES. X7580 Replying to EWT3/FG26.11.26. The question of reducing the bulk and cost of the tool kit was gone…

scan0204 Potential reductions to the car's tool kit, with a comparison to Mercedes.
View original record contd :- -2- It is possible that we might be able to make slight reductions in the tool kit for instance, it may be possible to leave out the hydrometer. The tools and spares given with the RR. car…

scan0205 Standard tool kit for the Phantom model for daily versus extended tour usage.
View original record To C. from Hs. X5580 Hs2/LG31.1.27. X8580 PHANTOM TOOLS AND SPARES. We have recently supplied you with a list of tools which we consider should always be carried on the car. We also pointed out that…

scan0206 Design alterations, discussing the strategy of using existing parts to minimise jigs, tools and replacement stocks.
View original record HM/NRC. from DA. c. to Wor. E, DA3/M13.3.28. ALTERATIONS TO DESIGN. X.7310 X.5580 X.7580 Replying to HM/NRC3/MW8.3.28., we fully appreciate the importance of keeping the number of jigs, tools,…

scan0207 Query regarding the inclusion of both an oil syringe and a Lucas oil can in the tool kits for 20 & 40/50 HP chassis.
View original record HS. --- X5580. BY/Cgh7/G.23.12.29. x7580. CHASSIS TOOL KITS. ----------------- We find that an oil syringe and a Lucas oil can are included in tool kits for both 20 & 40/50 HP. chassis, and would like…

scan0208 Considering the inclusion of a syringe in the chassis tool kit for lubrication and maintenance.
View original record K5580 By/Cgh. From Hs/AJL. Hs/AJL.3/MJ.3.3.30. K5580 CHASSIS TOOL KITS. BY/Cgh7/G.23.12.29. We consider that botht the Lucas oiler and the syringe should be supplied in the tool kit. The use of a…

scan0209 The outcomes of a conference regarding the supply of tool kits for 40/50 HP and 20/25 HP chassis.
View original record COPY. x5580. To Sg. c. Wor. c. Hs. c. EP. c. Mx. c. Hm. c. Oy. X.7580. X.5580. BY2/N.23.5.30. Re. Conference on Tool Kits at which the following were present :- Mr. Lidsey for Hs. Mx. Hm. Oy. Mr.…

scan0210 Packing note listing spares and tools supplied with a 20 HP chassis.
View original record R.R. 22A. 6th Revise (5 Pds.) (DG 540) 8-11-29. J.H., Ltd. ROLLS-ROYCE LIMITED. No. 3252 Spares and Tools supplied with 20 H.P. Chassis No. PACKING NOTE. TOOLS. F 51960 Jaw Spanner 5 B.A. F 51961 " 3…

scan0211 Proposed alterations to the tool kits supplied with both chassis types.
View original record X5580 BY. From Hs/AHL. c.c. to SG. Wor. c.c. to XP. MX. c.c. to WH. CY. Hs/A.L.1/WJ.4.6.30. X7580 X5580 TOOL KITS (BOTH CHASSIS). With reference to BY/WJ/23.5.30. we propose to make the following…

scan0212 Retention or deletion of items from a vehicle's original tool kit, based on feedback from the Inspection Department.
View original record Sg. From PN. c. to C. H. By. Hs. Hmn. COPY. X5580. PN.1/WT.2.7.30. X.7580. X.5580. STANDARDISATION SHEET 12.6.30. No. 7580. 5580. I have refrained from signing this sheet until I had available the…

scan0213 Reduction of tools in the tool kits for Phantom II and 20/25 HP models.
View original record COPY. H.1/N.26.6.30. Reduction of Tool Kits on Phantom ll and 20/25 HP. Models. I have taken the views of my department on the question of deleting certain tools from the kit, as follows: (1) Tools…

scan0214 Reduction of the standard tool kit provided with cars.
View original record To PN. from Hs/AJL. c.c. Sg. c.c. C. H. c.c. EV. Hm. X5580. Hs/AJL2/AD4.7.30. X7580 X5580 TOOL KIT REDUCTION. With reference to Pnl/WT2.7.30, the proposed reduction of tool kit was arrived at after…

scan0215 Proposal to reduce the contents of tool kits based on customer capability and alternative maintenance solutions for brake squeaking.
View original record Hs AJL Y5580. X-7580 Y5580 Sg... from PN. Copy to C. H. By. Hs. Hm. RECEIVED JUL 18 1930 PN.1/WT7.7.30. Proposed reduction of tool kits. With further reference to PN.1/WT2.7.30. and Hs/AJL2/AD.4.7.30,…

scan0216 Standardisation of Chassis Parts for a revised tool kit on the Phantom II & 20/25 HP models.
View original record RR 755 REVISED (IOH) (DF 687 4-1-29) BM. 2/5943. X5580. CONFIRMED 26.7.30. STANDARDISATION of CHASSIS PARTS. Description of Parts: REVISED TOOL KIT. PHANTOM II & 20/25 HP. Origin: To reduce the number…

scan0217 Reductions to the tool kits for Phantom II & 25 HP models.
View original record Hs/AJL.1/MJ.12.6.30. TOOL KITS. PHANTOM ll & 25 HP. It has been suggested that we supply more tools withour chassis than are necessary to do the jobs which we should expect to be done outside our own…

scan0218 Continued list of car parts, tools, and accessories.
View original record -2- Hs/AJL.1/MJ.12.6.30.Contd. Luggage grid straps. An assortment of spare washers of all sizes. Hydrometer. Spare water pipe clips. (Our present standard clips are now so good that spares are not…

scan0219 Confirming an agreement on reducing the contents of a tool kit, with specific exceptions noted.
View original record To Hs. From Sg. c. to PN. COPY. Sg.4/D25.7.30. Re. Tool Kit Reduction. Referring to former correspondence and our conversation yesterday, I return the Standardisation Sheet marked "Agreed as per…

scan0220 Confirming the standardisation and reduction of tool kits, noting an exception for specific spanners.
View original record x5580. BY. From Hs. Hs.1/MJ. 26. 7. 30. x7580. x5580, REDUCTION OF TOOL KITS. The Standardisation for this has now been completed. The only exception to the agreed list is that Sales wish to retain…

scan0221 Urgent internal memo requesting a detailed cost statement for tools and spares on 20/25 HP and Phantom ll cars.
View original record X 5580. To Rb. From Hs/Lid. Hs/Lid.3/MJ.11.1.32. x5580 CAR TOOLS & SPARES. In connection with investigations we are making with a view to reducing the cost of the tools and spares supplied with our…

scan0222 Price inquiries for various spanners and tommy bars for car tool kits.
View original record Roy. From Hs/Lid. c. to Wor. Hs/Lid.6/MA.11. 1. 32. CAR TOOL KITS. With reference to the effort that is being made to reduce the cost of tools and spares which we supply with our chassis, there is a…

scan0223 Requesting comparative prices for spanners and clarification on part marking requirements.
View original record -2- E-6422 - C Spanner (20/25) F-82810 - Petrol tank and cross steering tube (40/50) For comparative purposes will you please let me have the price of all the above spanners as at present provided.…

scan0224 Proposal for a new hub removing spanner for the 20/25 HP chassis.
View original record LID RHC. c. Hs. X5580 BY/Cgh. 2/G. 18.1.32. 20/25 HP. CHASSIS - HUB REMOVING TOOLS. We hand you herewith print of G.55338 showing proposed spanner for removing the hub retaining nut and print of…

scan0225 Suggesting cost savings on car tool and spares equipment, with a breakdown of current and future costs.
View original record X5580 Sg. Fran Hs/Lid. c. to Mr. EY. c. to " E. Roy. c. to Mr. MX. Hs/Lid.1/MA.16. 1. 32. X5580 CAR TOOL AND SPARES EQUIPMENT. We give herewith suggestions by which considerable saving in cost of the…

scan0226 Note listing part numbers and the pricing of tools for a Phantom II car.
View original record -2- Hs/lid.1/NA.16.1.32.cont'd. P.II. CAR. G.75373 - Dunlop Wheel spanner (21.11.0d. will be reduced to £1.7.0d. this is still excessive.) E.79634 - Valve spring replacing tool 11.10d

scan0227 Economies by deleting certain tools and spare parts from the standard car equipment.
View original record -3- DH/Aid.F/DM.16.1.32.cont'd. CAR TOOL AND SPARES EQUIPMENT. 20/25. An investigation of the tools and spares given with our cars reveals the following suggested economies. (1) Immediate Economies.…

scan0228 Cost-saving measures through tool substitutions and component design alterations.
View original record -4- HS/Lid.1/SA.14.1.32.cont'd. F.52219 Cross steering tube spanner :- (Spring loaded tred should not be adjusted by customer.) E.6298 C. Spanner Exhaust pipe nut (Now obsolete.) E.6422. C. Spanner…

scan0229 Standardizing plugs and spanners to reduce costs, with a revised tool kit list.
View original record -5- Hs/Lid.1/MA.16.1.32. cont'd Gear box filler plug. There does not appear to be any reason why these should all be different sizes. It should not be very difficult to alter the parts in question so…

scan0230 Continued list of tools and parts, including tyre levers, gauges, spanners, and hub tools.
View original record -6- HS/Lid.1/MA.16.1.H2.cont'd Dunlop tyre lever. Dunlop Jack and Handle. Feeler gauges. Carborundum paper for L.T. contacts Nesthill tyre pump. Kismet tyre pressure gauge. Oil syringe. Kays oil can.…

scan0231 List of spare parts and tools to be deleted from the 40/50 HP Phantom II chassis equipment for cost savings.
View original record -7- EB/Tid.1/MA.15.1.32. CONT'D CAR TOOL AND SPARES EQUIPMENT. 40/50 HP. P.II. CHASSIS. An investigation of the tools and spares, (on the same lines as that carried out on the 20/25 HP. car.) which…

scan0232 Cost-saving measures through alterations to tools and chassis components.
View original record -8- Hs/Lid.1/A.16.1.32.cont'd 1-D.50837/8 Jaw spanner, distributor contacts. 1-E.6422 C. spanner, steering col: thrust race. 1-D.50912 3" dead smooth file and handle. 1-E.75871/2 Valve grinding tool.…

scan0233 Rationalization and potential economies of car tool and spares equipment.
View original record copy X 5580. X7580. To Hs. from Sg. Copy to Wor. By. E. Roy. NP. Mx. Cx. Re Car Tool and Spares Equipment. Sg21/E27.1.32. Referring to Hs/Lid.1/MA.16.1.32. I have studied this great interest and the…

scan0234 The deletion of chassis spares and tools for economy on the 20/25 HP and 40/50 HP models.
View original record Sg. [crossed out] e. Yox [crossed out] C. Cly [crossed out] C. Ho. [crossed out] C. Hs. [crossed out] C. ROY. [crossed out] C. Mr. [crossed out] C. MD. [crossed out] Handwritten: X5580…

scan0235 Recommending the replacement of single-ended spanners with double-ended jaw spanners for car tool kits, detailing parts, prices, and savings.
View original record X5580. Sg. From Hs/Ltd. c. to Wor. E. c. to Mr. Roy. c. to Mr. Ex. Hs/id.3/AJS. 2. 32. CAR TOOL AND SPARES EQUIPMENT. --------------------------- We have made enquiries from several firms with regard…

scan0236 Confirming the decision to adopt double-ended jaw spanners once the stock of single-ended spanners is exhausted.
View original record x5580. x7580. To BY from Sg. Copy to Hs/Lid. Wor. E. Roy. EP. MX. Car Tool and Spares Equipment. Sg3/E5.2.32. Referring to Hs/Lid.3/MJ.3.2.32., and the recommendation in the second paragraph that…

scan0237 Confirming the arrangement for double-ended jaw spanners to be adopted for the 20/25 HP 'U' series and 40/50 R.H. and L.H. chassis.
View original record x5580 x7580 Sg. C. to Wor. c. to E. c. to Hs. c. to EP. c. to Mx. c. to Roy. -------- BY/Cgh.17/G.9. 2. 32. ------------------- CAR TOOL AND SPARES EQUIPMENT. ------------------------------ With…

scan0238 Arguing against changing from single-ended to double-ended car spanners.
View original record Hm.16.2.32. COPY OF MEMO RECEIVED FROM R. DATED 13.2.32. C. to Sg. Wor. Rg. c. to E. De. RY. c. to EP. Re. CAR SPANNERS. I hope you will not press for the change of spanners from single to double…

scan0239 Chassis tool kit, particularly single-ended spanners, and potential cost savings.
View original record XS580 Hs.2/WJ.19.2.32. To R. From Hs. c. to Es. Wer. c. to E. Da. c. to SY. CHASSIS TOOL KIT - SINGLE ENDED SPANNERS. X.7580. X.5580. The tool kit which we have been supplying with our cars in the…

scan0240 Standardisation of chassis parts, specifically the reversion to double ended jaw spanners for car tool kits.
View original record RR 75B (10H) (19120, 13-10-31) BM. 3/7588. 20/25HP and P.II COMPLETED 6. 4. 32. STANDARDISATION of CHASSIS PARTS. Description of Parts. Reversion to double ended jaw spanners for car tool kits.…

scan0241 Standardisation of chassis parts form detailing the introduction of a new part.
View original record STANDARDISATION OF CHASSIS PARTS The number of the first chassis on which the new part will be fitted..... 'U' Series. Date when chassis willb be handed to test... 10.4.32. Cost of scrapped material,…

scan0242 Suggesting the number of spanners in the 20/25 chassis tool kit is unwarranted.
View original record Copy. X5580. To Hs. From Sg. re. Chassis Tool Kit - Single Ended Spanners. Sg.25/E22.2.32 X.7580. X.5580. I have forwarded your Hs.2/MJ.19.2.32 to R. but have added the following P.S. :- "The number…

scan0243 Adoption of double-ended spanners for economy, noting a preference for single-ended ones.
View original record 855-80. To Sg. From Hs. c. to Wor. c. to By. Hs.1/MJ.30.3.32. x7580. DOUBLE ENDED SPANNERS. R. has agreed to double ended spanners, but has added the following remark :- "Personally I very much prefer…

scan0244 Questioning the adequacy of the double-ended spanner in the tool kit for tappet adjustment.
View original record COPY. x5580. Hs/Lid. From Mx. Mx.3/T8.8.32. x7580. TOOL KIT. It is considered by EP's Dept. that the double ended spanner provided in the tool kit which is used for tappet adjustment is inadequate for…

scan0245 Rationale for including a double-ended spanner in the tool kit for 20/25 HP cars.
View original record X5580. To Mx. Hs/Lid.1/KT.9.8.32. TOOL KIT (Mx3/T8.8.32.) x7580 We presume that the double ended spanner referred to, is used for adjusting tappets on 20/25 HP cars. We went thoroughly into this…

scan0246 Options for tool storage on 40/50, 20/25, and Bentley models, moving away from under-bonnet locations.
View original record COPY. X5580 W/S. To Cx. from E. c. Sg. Wor. Hs. By. Bn. Ev. Re. Tools under the bonnet on 40/50, 20/25 and Bentley. ------------------------ We heartily agree with the sentiments you have expressed in…

scan0247 Request to include a tappet spanner in the tool kits for the Phantom III & 25 HP cars.
View original record To By. x543 Hs/FD.27/KW.5.3.36. Ph.III & 25 HP. Tool Kits. We shall require a tappet spanner of the square key pattern for the tool kits of the above 2 cars. The spanner F.79087 used previously on…

scan0248 On the correct procedure for removing the distributor cam on Bentley and 20/25 HP cars to prevent engine detonation.
View original record K173 To By. c. to E. c. to Mx. c. to Hd. c. to K. c. to P. (Sr.) Removing Distributor Cam on Bentley and 20/25 HP. Cars. As we have previously pointed out, if this cam is removed with a screwdriver it…

scan0249 Secret memo concerning the introduction of a new pedal position on chassis for the Indian market.
View original record To Hs. from DA. X.5470 S E C R E T. DA3/12.5.25. INDIA. As we understand the new position of pedals will be introduced after 170 chassis no doubt you will take an early opportunity of building up a…

scan0250 Standardisation of chassis parts by moving the pedals nearer the dashboard to improve body space.
View original record RR 755 (10H) (DB130 12-9-24) MS 301225 K5470 COMPLETED 15.6.26 STANDARDISATION of CHASSIS PARTS. Date 18.5.26. Description of Parts PEDALS NEARER THE DASH. 15 Origin. To improve body space.…

scan0251 Standardisation Sheet No.5470, for putting the pedals nearer the dash on the 20 HP chassis.
View original record [Typed] To Hs. from BJ: 20 HP. Pedals nearer the Dash. Standardisation Sheet. With reference to the attached Standardisation Sheet, No.5470, putting pedals nearer the dash on the 20 HP chassis, I have…

scan0252 Confirming consent for the incorporation of stops on the 'India' plus FWB brake pedals.
View original record X5470 Secret. ---------- Sft. Wor. Hs. C. BY/HHB. ---------- BY2/H. 26.5.25. ---------- STOPS FOR "INDIA" PLUS FWB. BRAKE PEDALS. ------------------------------------ I have received CJ's consent to…

scan0253 Authorising a standardisation to move the pedals on the 20 HP model 2 inches nearer the dash.
View original record To Sg. from BJ. 20 HP. Pedals nearer the Dash. Standardisation Sheet. BJ2/E15/6/26 Copy to Hs. I have just signed a standardisation sheet No.5470, authorising that pedals on the 20 HP on the raked…

scan0254 Proposal to improve accelerator pedal operation by adding a radius to the pedal plate.
View original record X5470 Hs. Copy to:- S.G. S.P. OWB4/GM/16.4.28. ACCELERATOR PEDALS. Some difficulties are experienced from time to time with various cars, particularly those with special seatings, in the smooth…

scan0255 Proposed new positions for the 20 HP steering column and pedals.
View original record X5470 Ry. from DA. DA3/M29.6.29. c. to Sg. Hs. 20 HP. STEERING COLUMN. X5430 X5470 With reference to Ry5/G26.6.29., we have already gone into the question of the proposed new positions, and send you…

scan0256 Driver seating positions, cushion dimensions, and adjustments for different driver sizes.
View original record C. from Da/EV. C. Sg. E. Hs. X5470. Da/EV3/M29.5.30. X.7430 X.5430 X.7470. X.5470. SEATING POSITIONS. It was demonstrated at a conference at WW. yesterday that the driven seats of our experimental…

scan0257 Modifications to the clutch and brake pedals for the J.3 model, including prints for new schematics.
View original record R. From DA. SECRET. X5470 DA1/M10.3.31. C. to SG. WOR. C. to HS. BY. HY. JAPAN 3. PEDALS. Herewith we send prints of N. schs. 3245 & 3252., arrangements respectively of the clutch and brake pedals on…

scan0258 The modification and standardisation of adjustable clutch pedals for the 25 HP Synchro Mesh Gearbox.
View original record X5470 HS. FROM DA. Copy to SG. J. 4. - SYNCHRO MESH GEARBOX. DA1/M15.7.31. X.5310. X.5470. We recently sent you a drawing for the pedals of the above gearbox using existing forgings. But we presume…

scan0259 Complaints of a driver's shoe getting jammed by the brake pedal on the 20/25 HP Chassis.
View original record BY. [Struck through] c. Hs. LIP X5470. EP6/H3.11.31. re. 20/25 HP. Chassis. Foot Pedal Clearance. We have received one or two complaints that one's shoe at times gets jammed between the brake pedal…

scan0260 Tapping noise from pedal movement caused by engine torsion.
View original record X5470. To EY. From Hs/Les. c. to Wor. Da. c. to Sg. Hs/Les.3/WJ.24.11.31. x7470. NOISE CAUSED FROM PEDAL MOVEMENT P.11. This is a liable complaint with Diamond engine mounting, caused from the…

scan0261 New scheme for pedal mounting, modified from original Japan schemes to suit a new gearbox.
View original record BY. FROM DA. X5470 DA4/m24.11.31. X5470 C. to SG. HS. J. 3. PEDALS, ETC. Herewith we send N.scheme 3370/1/2, shewing the mounting of the pedals. In general they follow the original Japan schemes,…

scan0262 Sending drawing N.Sch.3398, which shows the J.3. accelerator pedal and notes its similarity to the Phantom's.
View original record BY. FROM DA. C. to SG. HS. E. J. 3. PEDALS. Handwritten: X5470 Typed: DA2/V31.12.31. X5470 Herewith we send N.Sch.3398 shewing the accelerator pedal. We have also indicated the other pedals though the…

scan0263 The scoring of a pedal shaft bearing on a 25 HP chassis due to inadequate lubrication, requiring a design alteration.
View original record X5470. To E. From Hs/GWH. c. to By. Hs. Hs/GWH.7/KT.27.5.32. 18.G.IV. X5840. Re. 25 HP. Pedals to LOP.F.58013. The pedal shaft on the above chassis had the bearing end barrelled to get over the…

scan0264 Preventing clutch pedal oscillation on J.III and Peregrine models by adding a spring thackery washer.
View original record Y 5470 x4077 By. From Hs/Les. c. to E. c. to Wor. Hs/Les.5/MA.15.7.32. J.III AND PEREGRINE PEDALS. In order to prevent the clutch pedal from oscillating up and down due to its own inertia, it is…

scan0265 Modification to the 25 HP accelerator pedal to reduce its operational load.
View original record X535 To E. c. to By. c. to Hs/Rm. Hs/GWH.11/KW.8.10.35. 25 HP. Accelerator Pedal Load. We have arranged with Mx. to move the stop for the return coiled spring on the accelerator pedal, releasing the…

scan0266 Loose diagonal link on the pedal shaft of car 22-G-V, recommending a modification for production cars.
View original record To E. c.to By. X535 Hs/Smth.7/KW.5.5.36. Pedals on 22-G-V. The diagonal link worked loose at the frame end, causing the pedal shaft to drop during the 10,000 miles run in England. This is just secured…

scan0267 Cost-saving modification for the 25/30 model pedals, changing a stay from a brazed assembly to a single forged piece.
View original record 535. EY. [Struck through] c.c. to. Da. Fm. HWS. Mr Clay. [Struck through] [Signature: Fmth] E/HDY.2/HP.25.3.37. 25/30 Pedals. We send herewith N.Sch.5079 showing the stay between the pedal shaft and…

scan0268 Requesting suggestions for fixing recurrent squeaks on chassis GNC-28.
View original record N/W - Rm/GWH. W/K. Br3/H.14.11.38. [STAMPED] NOV 17 1938 Re: Chassis No.GNC-28 - Rayment. [Handwritten:] GWH APM has 'swen on liners' V690 GN) The above is the car upon which we fitted the special…

scan0270 The investigation and resolution of servo squeaks for chassis GNC-26.
View original record BY. c. Mx. c. Rm/AFM. Rm/GWH.23/G.21.11.38. CHASSIS NO. GNC-26. RE: SERVO SQUEAKS. With reference to the above chassis which has had recurrent servo squeaks, and which werecently fitted RAD.13 discs…

scan0271 Inefficient servos in Bentley chassis due to wear on dowel pins and a proposed solution.
View original record Kingsbury To Bentley Motors Ltd. Derby................... Copy to Hm. " " Rm/GWH. Levallois, Sr/VA.4/HB.18.10.38 GWH re: Servo - Bentley Chassis We have fairly recently had to attend to several cars…

scan0272 Diagram illustrating wear and a subsequent modification to Servo-Frein (Servo Brake) components.
View original record FOR GWH. 'K' SERVO-FREIN VOIR DESSIN G54808 (20/25 HP) G52130 G54285 DOWEL PINS TOO SHORT. WEAR. Fig. 1. Fig. 2. WE HAVE EASED THE BUSHES. .060" ENVIRON Fig. 3. PARIS 14.10.38 HO.

scan0273 Modifications and issues with the servo on a Bentley chassis.
View original record W/P. (Strikethrough) To Sr/Va. from Rm/AFM. (Strikethrough) C. Rlye (Strikethrough) c. Hd. (Strikethrough) c. Rm/GWH. W/K. Rm/AFM.3/MH.20.10.38. RE SERVO - BENTLEY CHASSIS. In reply to your…

scan0274 Resolving a knock in a Wraith's rear shock damper by reducing lateral play.
View original record To By.. from Rm/GWH. c. Mx. c. Rm. Rm/GWH.12/N.20.9.38. Wraith - Shock Dampers. Sg's Wraith has been into Cricklewood for a knock in the rear of chassis. This was traced to the O.S. rear damper having…

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