Rolls-Royce Archives

Rolls-Royce Experimental Archives: Box ExFiles\Box 105\2\        Box Selection

IdentifierEntry
scan0001 Design of the steering column and the material for the instrument board for the 'India' model.
View original record (5530) To DA/EV. from R. S E C R E T. R2/M9.4.25. c. to CJ. E. c. to BJ. LHS. c. to BY. HS. I N D I A. STEERING COLUMN & INSTRUMENT BOARD. X.5430 X.5530 At present it seems that we have nothing to…

scan0002 The 20 HP model's scuttle and dash isolation, specifically regarding instrument board brackets.
View original record R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. X5530. EXPERIMENTAL REPORT. Expl. No. REF: Hsll/LG15.6.25. To DA/EV; from Hs. c. to LHS. RE. 20 HP. SCUTTLE AND DASH ISOLATION. XC4613 X5530. We are not in a…

scan0003 The supply of extra framed instruments for Captain Burt.
View original record To DA/EV. from Hs. X5530 Hs6/LG6. 7. 25. FRAMED INSTRUMENTS. X8530 X5530 Once the design has been finally settled, there should be no difficulty in being able to supply an extra for Capt. Burt as long…

scan0004 Instruments, instrument board, and petrol gauge design for Phantom and India models.
View original record Hs. } To BY. } FROM R. DA. } LE CANADEL. c. to CJ. BJ. LHS. c. to E. RG. PN. Wor. X5530 R1/M16.3.26. PHANTOM AND INDIA INSTRUMENTS ETC. X.5530 X.3896 X.8530 X.8490 INSTRUMENTS. I am very pleased with…

scan0005 Record of agreement on the standardisation of coachwork features.
View original record x5530 STANDARDISATION OF COACHWORK FEATURES. x8530 SIGNATURE. DATE. REMARKS. Lord Herbert Scott. 16.7.26 Agreed - C.S.C. hope that all dials may be uniform. LHS. for C.S.C. Mr. Everndon for 14.7.26.…

scan0006 Standardisation document for transposing the ammeter and thermometer on 20 HP and 40/50 HP chassis.
View original record RR 755 (10H) (DB130 12-9-24) MS 301225 STANDARDISATION of CHASSIS PARTS. COMPLETED 21.8.26 Date 14.7.26 X No. 8530 / 5530 Drawing No. Part List Description of Parts: 20 HP. AND 40/50 HP. TRANSPOSING…

scan0007 Status of new grouped instruments for 40/50 and 20 HP models.
View original record To Hs. DA. BY. from R. c. to Wor. BJ. 45530 R1/M14. 7. 27. GROUPED INSTRUMENTS. X. 8530 X. 4308 X. 5530 X. 4662 We are waiting for new models of 40/50 and 20 HP. from Hs. Does Hs. want anything from…

scan0008 Internal memorandum about redesigning the instrument board for better appearance and value, comparing it to competitors.
View original record DA. Hs. from R. BY. c. to BJ. E. C. SG. 45530 R6/M11.4.28. INSTRUMENT BOARD. X. 7530 X. 5530 I am at present not in agreement with our doing anything in these except improving and simplifying our…

scan0009 Continued memo discussing cost to the customer and selling only standard equipment.
View original record contd :- -2- cost - we should next decide if it is desirable at this cost to the customer. We ought to sell nothing but our standard equipment, same as carburetters, brakes, etc. R.

scan0010 Telegram requesting a framed patch of instruments for Mr Royce's Twenty.
View original record Handwritten reference: X 5530. Stamped number: 0253. Office Stamp: DERBY 18 JU 28. Time handed in: 3-53. Office of Origin and Service Instructions: Chichester T. 17. Message: Hives Roycar Derby. can…

scan0011 Urgent internal memo regarding the sourcing of a set of framed instruments for Mr. Royce's car.
View original record URGENT X5530 EV1/6.7.28. to Hs. from Da/Ev. copy to EL. Hs. RE FRAMED PATCH OF INSTRUMENTS. FIRST INDIA 3. We thank Derby for their wire to the effect that they have no sets of framed instruments and…

scan0012 Telegram received by telephone concerning the supply of instrument parts.
View original record RR 144A (50BKS.) (DB 914 6-5-25) MP 317364 X5530 ROLLS-ROYCE LTD. TELEGRAM RECEIVED BY TELEPHONE. +8300 Time Received: 11-46 Date: 9-7-28 To: Raypan Healy By: NZA from: London 11-15 Message: Thius…

scan0013 Correspondence regarding the supply and fitting of a framed instrument patch.
View original record GW. X5530 Da/Ev. WW. (Copy to Hs): " " BJ. " " Sg. Sg1/W/9.7.28. Re: Framed Patch of Instruments. In reply to EV1/6.7.28, we telegraphed this morning reading as follows:- "We can supply framed…

scan0014 Short typed message regarding the supply of an instrument patch set.
View original record ROYCAR DERBY HIVES HAVE WIRED EVERNDEN WE CAN SUPPLY INSTRUMENT PATCH SET. SIDGREAVES.

scan0015 Dispatch of a framed patch of instruments to Barkers and speedometer calibration for chassis 12-G-4.
View original record X5530. Hs at W 92.0Cce. New Axle 10-47 = 4.7-1 97.5" Old Axle 11-50 = 4.55-1 60 M.P.H. Old Axle 2960 New. 3240 Hs. Copy to Ev. Sg/Hn.1/AMC/12.7.28 CHASSIS 12-G-4 - COUPE FOR R. Please note we have…

scan0016 Modifications to the cast dashboard for the INDIA 3 car to accommodate a framed instrument panel.
View original record BY. from DA/EV. c. to Hs. BJ. X5530. Evl/18.3.28. RE. CAST DASH - INDIA 3. X.5500 X.5530 We send herewith N.sch.2650 shewing certain modifications which it will be necessary to make to the cast dash…

scan0017 Modification of an instrument patch and speedometer for Mr. Royce's car and two other India 4 chassis.
View original record DA. c. Hs. X5530 BY/Cgh9/G.17.7.28. INDIA 4. INSTRUMENT PATCH. -------------------------- The instrument patch which Sales are sending to be fitted to the instrument board of Mr. Royce's car is at…

scan0018 Speedometers and modifications for instrument boards on models 14-G-4 and 16-G-4.
View original record FROM DA/EV. V5530 ORIGINAL DA/EV1/M26.7.28. Copy to - HS. INDIA 3. INSTRUMENT BOARDS. X.5530 Replying to BY/CGH9/G17728., we suggest the speedometers suitable for the framed patch of instruments…

scan0019 Instrument boards for India 3, regarding the suitability of speedometers and a delay for modifications to include a K.S. gauge and green lamp.
View original record BY/HER c. Hs. X.5530 BY/Cgh7/G.4.9.28. INDIA 3. INSTRUMENT BOARDS. -------------------------- WW. inform us that the speedometers for 14-G-4 and 16-G-4 should be suitable for the framed patch of…

scan0020 Instrument panel specifications for various experimental car models, including background colour and other features.
View original record To DA/EV. from Ex Hs/Rm. Y5530 Hs/Rm10/LGS. 12.28. INSTRUMENTS. Y7530 We should like some more information about instruments. In DA/EV5/M28.11.28 you say 20 EX. is to be fitted with standard type…

scan0021 Telegram received by telephone regarding specifications for tyres and an instrument.
View original record RR 144A (50BKS.) (DB 914 5-9-25) MP 317364 X5530 ROLLS-ROYCE LTD. TELEGRAM RECEIVED BY TELEPHONE. STAMP: RECEIVED 7 DEC 1926 Time Received: 12-3 By: W&A Date: 7-12-26 To: Roycar Derby from: Chichester…

scan0022 Design changes and feedback for a Hooper Sedanca, referencing Mr. Royce's requests.
View original record Hs. from DA/EV. c. to BY. Cx/Hn. X 5530 DA/EV1/M18.12.28. RE. HOOPER SEDANCA - 14-G-4. XXXXXX X.5390 X.5830 X.5530 We noticed that you had not had time to fit the runningboard toolboxes. Mr. Royce…

scan0023 Telegram received by telephone regarding car specifications.
View original record RR 144A (50BKS.) (DB 914 6-5-25) MP 317364 ROLLS-ROYCE LTD. X5530 TELEGRAM RECEIVED BY TELEPHONE. Time Received: 12-3 Date: 7-12-26 To: Roysar Derby By: VGA from: Chichester 11-25 10 Stamped: 7 DEC…

scan0024 Customer feedback on a 20 HP car, with suggestions on pricing, frame design, instruments, and weight.
View original record DA/EV )from R. E. Hs. ) c. BJ. SG. X530 R3/M21.1.29. MR. MINCHIN'S CAR. 20 H.P. RR. X.4118 X.5530 X.4555 Mr. & Mrs. Minchin stayed a day with us at Le Canadel, during the time Dodd was away with our…

scan0025 Design of a framed instrument panel, including dial colours and gauges.
View original record X 5530 Sg. from DA/EV. c. to BY. Hs. DA/EV3/M5.2.29. RE. FRAMED PATCH OF INSTRUMENTS. X.7530 X.5530 X.4038 Thank you for your SG17/M31.12.28. & SG19/M29.1.29. re. the above. We were aware that a…

scan0026 Instrument layout, a proposed buyer's guide, and vehicle design points.
View original record DA/EV. Hs. BY. from R. c. to Sg. Wor. E. c. to PN. CWB. X5530. RL/M2. 3. 29. FRAMED INSTRUMENTS. X. 7530 X. 5530 I am pleased you have arranged the instruments into the same space. I was very anxious…

scan0027 Scheme for grouped instruments on the SS & 20 HP models.
View original record SG. from R. c. to Wor. Hs. BY. c. to DA/EV. E. C. +5530 R1/M5. 3. 29. GROUPED INSTRUMENTS. SS. & 20 HP. X. 7530 X. 5530 I am extremely pleased to hear that you have decided to include the above with…

scan0028 Query about the delayed construction of an instrument board for a Barker Close Coupled Allweather vehicle due to missing instruments.
View original record Hs. from Ev. X5530 Ev7/29.4.29. X5530 X5830 X5800 Re : 16-C4. The Barker Close Coupled Allweather will be completed in about a week's time. So far we have been unable to make the instrument board, as…

scan0029 Obsolete lamps and a proposal to fit new instrument patches to cars 23-EX and 16-G4.
View original record X5530 To DA/EV. from Hs/Rm. Hs/Rm/LGS. 5. 29. 23-EX AND 16-G4. X7530 X7800 We thank you for your letter re. the lamps for the cars. We appreciate that we have been kept up to date on the matter of the…

scan0030 Continued discussion on improving the shutter control, suggesting a thermostatically controlled version for the S.S.
View original record contd :- -2- as we have had no information to the contrary since sending our wire. Perhaps you will say if this meets with R's approval. We do not know whether you have any scheme in hand for…

scan0031 The preparation and supply of framed patch instruments for specific car models.
View original record To BY. from Hs/Rn. FRAMED PATCH INSTRUMENTS. We are preparing a Phantom 23-EX and 20 HP. 16-G4 for R's use. He has asked for a revised patch of instruments to N.sch.2836. We have now used up all the…

scan0032 Surplus lamps, instrument panels, and radiator shutter modifications.
View original record X5530 HS/RM. From DA/EV. SECRET. DA/EV2/M8.5.29. 23-EX. & 16-G-4. X.7800 X.5530 X.5800 X.1357 X.7530 Thank you for HS/RM4/LG6529. We note that the surplus of lamps in the stores to which you referred…

scan0033 Production and ordering of instrument panel components for a specific scheme.
View original record To H.I.C. from Hs/Rm. X.5530 Hs/Rml/LG9.5.29. PATCH INSTRUMENT TO N.SCH.2836.X7530 We think that you should produce 6 sets of material for this scheme. We think the only instruments that should be…

scan0034 Proposing a modification to fit lugs in a new position on existing instruments.
View original record To BY/CGH. from Hs/Rn. X5530 Hs/Rm4/LC9.5.29. +7530 With reference to BY/CGH8/N8. 5. 29. We had noticed the different clamping positions on the instruments. It is however a relatively simple matter…

scan0035 Complaints about the difficulty of fixing the K.S. petrol gauge and proposing a temporary solution.
View original record X5530 To Da. From Hs/Rm. Hs/Rm.2/MJ.6.6.30. X.4038. X.7530. X.5530. K.S. PETROL GAUGE. We have had complaints from time to time from the final test people that the normal method of fixing the K.S.…

scan0036 Cost of replacing cracked glass on framed instrument patches and considering a revised design.
View original record X5530 Hs. ) FROM DA/EV By. ) C. to Cx/HN. Da/EV2/M18.6.30. X.7530 X.5530 RE : FRAMED INSTRUMENT PATCH. We are informed by Sales that in one or two cases the glass of the framed patch of instruments…

scan0037 Disputing an excessive charge for replacing glass in a framed instrument patch.
View original record Da/Ev. From Hs/AJL. c. to BY. c. to CX/Hn. X5530 Hs/AJL.1/MJ.20.6.30. X7530. re. FRAMED INSTRUMENT PATCH. With reference to Da/Ev2/M18.6.30., we certainly agree that the charge of £2 for fitting a new…

scan0038 Design of the petrol gauge and the installation of instruments on the dashboard.
View original record Hs. from R. c. Sg. By. c. Cx. Oy. X5530 RL/ML.7.30. X.4038 X.7460 X.5460 X.7530 X.5530 PETROL GAUGE. We think this should be made to suit the present production because we cannot alter the petrol tank…

scan0039 Suggesting a solution for recurrent cracked glasses in patch instruments on customer's cars.
View original record Y5530. To Wor. From Hs/GWH. c. to Hs. Hs/GWH.5/KT.4.2.31 x7530. x5530. RE PATCH INSTRUMENTS. With a view to lessen complaints of recurrent cracked glasses in patch instruments on customer's cars we…

scan0040 Arrangement of controls and instruments for the Japan 3 chassis, including component supplier suggestions.
View original record SG. FROM DA. SECRET X5530 DA1/M6.2.31. C. to WOR. E. C. to BY. HS. JAPAN 3. - CONTROLS, INSTRUMENT BOARD, ETC. X.5240. X.5530. X.5770. Referring to SG10/E4231., we have looked into the question of the…

scan0041 Secret internal memorandum discussing proposed chassis controls and equipment for a 'Japan 3' project.
View original record SG. FROM E. SECRET XSS30 EL/M6.2.31. C. TO WOR. HS. C. TO BY. DA/EV. JAPAN 3. CONTROLS. X. 5240 X. 5530 X. 5770. Referring to your memo. SGLO/E4231., we examined the equipment of the Humber with…

scan0042 Query about a modification to Phantom instrument boards to prevent cracked glass.
View original record Copy X5530 to Hs. from Sg. Patch Instrument Boards, sg12/E14.4.31. Y7530 85530. Copy to Bv. Phantom. There is a Standardisation Sheet dated 5.2.31, no.7530/5530, which has come before me for…

scan0043 Standardisation of patch instrument board glass, proposing a move away from drilled glass with reflectors.
View original record To Sg. From Hs. X5530. Hs/GWH.5/KT.16.4.31 PATCH INSTRUMENT BOARDS X.7530. X.5530 Referring to the standardisation sheet, originally the glass for patch instruments was drilled and two reflectors were…

scan0044 Standardisation of plain glass with stuck-on reflectors for patch instruments to prevent cracking.
View original record RR 785 (10H) (3-7-30) BM. 6/2571. X5530. COMPLETED 18.4.31. STANDARDISATION of CHASSIS PARTS. Date 5.2.31. Description of Parts. Plain Glass in Patch instruments with reflectors stuck on. Origin. To…

scan0045 Page stamped 'For Repair only', with heavy bleed-through from the reverse side.
View original record For Repair only. (The following text is mirrored bleed-through from the reverse of the page) .SТЯАЧ ƧIƧƧAHƆ ИOIТAƧIᗡЯAᗡИATƧ (Right-hand column, from bottom to top): HS ИЧ 3 ЯƎ ᗡA ƆЯ Ɔ WOИ

scan0046 Proposal to improve the visibility of dashboard instruments by altering the pivot point of the needles.
View original record COPY. BY. FROM DA/EV. Copy to - HS. X5530. DA/EV5/M14.10.31. X5530 X7530 INSTRUMENTS. It is pointed out by Sales that in some cases fairly frequently the instruments on the upper part of the…

scan0047 Issues with the locating mechanism for Smith instruments on 'U' series 25HP models.
View original record E. From Hs/Les. c. to EV. c. to Sft. c. to Mor. LOCATIONS FOR SMITH INSTRUMENTS 'U' SERIES 25HP. We understand that production are temporarily dispensing with the location which governs whether the…

scan0048 Deletion of instrument locations on the Smith Patch for the 19-M car.
View original record -2- Hs/Les.1/14.6.32.Contd We think it may be an advantage to delete the locations if the instrument are satisfactory under road conditions. We are therefore arranging for there to be no locations on…

scan0049 Introduction of an instrument patch for the 20/25 and 40/50 HP chassis, with a focus on improving instrument lighting.
View original record X 5530 COPY. HS. BY/Cgh.15/G.7.12.32. X 7530 20/25 and 40/50 HP. INSTRUMENT PATCH. ------------------------------------- Sales are anxious that we should introduce the 20/25 HP. type instrument patch…

scan0050 Instrument board illumination, referencing the 1933 Buick and proposing new designs.
View original record X5530 To Cxr from E. c. Sr. For. PN. Hs. Bxx re Instrument Board Illumination. Referring to the latest 1933 Buick instrument board, we find there is nothing new in the system of illumination employed…

scan0051 Instrument board illumination, comparing silver versus white lettering for clarity and avoiding dazzle.
View original record X5530 To Ex. from E. E.1/HP.17.2.33. c.c. Sg. Lor. IN. Hs. By. re Instrument Board Illumination. Replying to your memo Cx11/KW.16.2.33, we do not seek to increase the amount of light on the…

scan0052 Design and features of the instrument board panel for RR & Bentley cars.
View original record X5530 E. FROM DA/EV. C. to SG. WOR. HS. BY. HDY. DA/EV1/M18.2.33. X.7530. X.5530. X.4553. X.4027. RR. & BENTLEY CARS. re. INSTRUMENT BOARD PANEL. We thank you for E1/HP10233. and the attached prints…

scan0053 Providing feedback on the design of a switchbox and instrument panel, covering mounting, ergonomics, and component selection.
View original record (2) With respect to the outer frame which is of the section exactly similar to that which we use, we suggest that this would be improved in appearance if it were very much less wide than on the…

scan0054 Design and supply of a combined speedometer and tachometer instrument panel from Smith & Sons.
View original record (3) We have asked Smith & Sons to send you a model of our latest design of combined speedometer and tachometer and glass edge illumination. We take it that as you are doing the design of the…

scan0055 Modifications to new type shock dampers for Phantom & 20/25 models to prevent oil leakage.
View original record COPY. X8820 Sft. Mx. c. Hs. c. BY/HEB. ---------- BY.2/G. 21.6.33. x7820 Phantom & 20/25 SHOCK DAMPERS - NEW TYPE. -------------------------- It is essential that the modifications which have been…

scan0056 Design and functionality of a new carburetter control for 20/25 HP instrument boards.
View original record x5530 W/S. To Cx. from E. c. Hs. By E.1/HP.29.5.34. New Instrument Boards 20/25 HP. Referring to your memo Cx.18/KW.25.5.34, we think you ought to see the new fitting for the carburetter control in…

scan0057 Haw Instrument Boards for the 20/25 HP model, requesting to see a sample of the controls.
View original record X5530 HS S/W. E. to Ms. By. Re- Haw Instrument Boards 20/25 h.p. CxIO/KW31.5.34. Many thanks for E.1/HP29.5.34, we should very much like to see one of the actual controls which you refer to, and hope…

scan0058 New instrument boards for a 20/25 HP vehicle and arranging to see a sample of the controls.
View original record GWH x5530 Please arrange for 21G to call at Conduit Street. Hs. HS S/W. E. C. to Hs. By. Re- New Instrument Boards 20/25 h.p. CxIO/KW31.5.34. Many thanks for E.1/HP29.5.34, we should very much like to…

scan0059 Proposals for the propeller shaft and universal joints on the 'Kite' chassis.
View original record To R from DA. Copy to BH. [Strikethrough] Copy to RFC. x4254 DA2/CB15-128-20. X.4234/5 Re "Kite" Chassis - Propeller Shaft & Universal Joints. We send herewith a print of "N" Scheme 688 shewing some…

scan0060 Continued discussion on design suggestions for various mechanical components, referencing figures 1 through 7.
View original record R.R. 285A (100 T) (S.G. 643, 19-2-20) G. 2618 DA2/CB15-12-20 contd. we have suggested that the final ball bearing on the gear box should be mounted on the flange piece of the joint. On Fig 5, in…

scan0061 Design alternatives for propeller shaft assembly, specifically concerning pillar support and tube end attachments.
View original record DA2/CB15-12-20 contd. or four spigots on it, for preventing the pillars collapsing, or it may be considered that a simple plate spigotting into the four pillars would answer the purpose nearly as…

scan0062 Design changes to the gearbox, axle universal joint, cylinder head, and pump drives for the 'NE Goshawk II'.
View original record R.R. 285A (100 T) (S.H 798, 10-12-20) G. 2947 x 4254 To Ds. from R. R3/G18.1.21. c. to CJ. c. to HJ. c. to Wor. c. to Hs. c. to Ey. x 4219. NE GOSHAWK II. (1) We are sending you on Wednesday the…

scan0063 Modifications to the Goshawk II's rear universal joint and propeller shaft.
View original record To-R from DA. Copy to DN. Copy to EFC. X.4254 DA9/CB20-1-21. Re Goshawk II - Rear Universal Joint & Propeller shaft. X.4254 We have modified this joint in accordance with the discussion we had with…

scan0064 Continued memo regarding gearbox speed and calculations for pumping on a joint.
View original record DA9/CB20-1-21 contd. of the gear box, and we may find that the speed is higher than that given. We attach some copies of the calculations for the pumping on this joint. It will be seen that it is not…

scan0065 Universal joint for the 'Goshawk II', referencing drawing Lec.1334 and a new propeller shaft.
View original record X4254 To Da. from E, c. to CJ. c. to Wor. c. to Hs. c. to EFC. E3/G22.1.21. X. 4254. RE UNIVERSAL JOINT - "GOSHAWK II". X.4255. We send you herewith drawing Lec.1334 shewing the above. This drawing is…

scan0066 Design revisions for the Goshawk II rear universal joint, referencing specific scheme blueprints.
View original record To R from DA. Copy to BN. Copy to EFC. X.4252 DA11/CB1-2-21. X.4252 RE GOSHAWK II - REAR UNIVERSAL JOINT. We send herewith a blue print of "N" Scheme 738 shewing the rear universal joint developed…

scan0067 Design modification to the 'Goshawk' II rear universal joint to prevent an oil leak.
View original record V. 4254 R.R. 235A (100 T) (S.H. 798. 10-12-20) G. 2947 To Da. from E. c. to CJ. c. to Wor. c. to Hs. c. to Ey. c. to EFC. X 4254 RE REAR UNIVERSAL - "GOSHAWK" II. With reference to N. Scheme 738, the…

scan0068 Instructions from Mr. Royce on securing a nose bearing race and specifications for a ratchet locking ring.
View original record Contd. -2- Referring now to the means of holding on the nose bearing race, Mr. Royce wishes to use a long cheese-headed screw put in from the outer end, and securing the bearing washer by means of a…

scan0069 Sending an updated print of Schedule 738 for the Goshawk 11 back axle and universal joint.
View original record X.4254. To R. from Da. c. to BN. c. to EFC. Da21/AH16.2.21. X.4254. RE. GOSHAWK 11 BACK AXLE AND UNIVERSAL JOINT. X.4256. We send herewith a print of "N" Sch. 738 which has been brought up to date in…

scan0070 'GOSHAWK II' universal joint behind the gearbox, sent with drawing Lec.1363.
View original record To DA. from E. Copy to CJ. " " WOR. " " HS. " " HY. " " EPO. X 4254 Hs COPY RECE MAR 9 1921 E1/GS/3/21. X.4254 RE "GOSHAWK II" UNIVERSAL JOINT BEHIND GEARBOX. We send you herewith drawing Lec.1363…

scan0071 Blueprints for the Goshawk II universal joint behind the gearbox.
View original record X.4254 1/ Re-by from DA. c. to HMG (1 print). c. to FP. c. to HS. DA6/CB9-3-21. X.4254 RE GOSHAWK II - UNIVERSAL JOINT BEHIND GEARBOX. X.4348 Please receive herewith three blue prints of Loc.1363.…

scan0072 The design of the rear universal joint for the Goshawk II.
View original record To OA. From E. Copy to CJ. " HS. " EE. " RPO. X.4254 COPY. RE "GOSHAWK II" - REAR UNIVERSAL JOINT. The drawing of the front universal joint, namely, Lec.1363, which has been sent to you, shews a…

scan0073 Design details for a wooden model of the Goshawk II sliding universal coupling.
View original record R.R. 235A (100 T) S.H. 793. 16-12-20: G 2947 X4254 H3 APP 7 RECEIVED To R from DA. c. to BN. c. to E.O. DA7/CB6-4-21. X4254 RE GOSHAWK II - SLIDING UNIVERSAL COUPLING. We are sending, under separate…

scan0074 Different design schemes for a rear universal coupling.
View original record X.4254 DA2/CB5-4-21. X.4254 RE REAR UNIVERSAL COUPLING. X.4348 In accordance with your instructions we have made a scheme of a fixed universal joint, following the lines of the sliding joint shewn on…

scan0075 Alternative method for retaining a spring and removing bushes from a joint.
View original record DA2/CB5-4-21. contd. We have shewn an alternative method for retaining the spring, which appears to us to be rather less work. On the whole, we think that the arrangement shewn on 815A is likely to be…

scan0076 Ordering a special cutter for manufacturing teeth on a Goshawk II sliding and universal coupling.
View original record R.R. 235B (100 T) (S.H. 768. 10-12-20) G. 2948 X4254 To DY from DA. [DY is struck through] c. to AY [AY is struck through] c. to HS. DA8/CB6-4-21. X4254 GOSHAWK II - SLIDING & UNIVERSAL COUPLING. We…

scan0077 Design modifications for the Goshawk II propeller shaft and coupling, including universal joint and shaft dimension changes.
View original record X.4254 To Da. from E. c. to CJ. c. to Wor. c. to BY. c. to Hs. c. to EFC. E5/G14.4.21 X.4255 X.4254 - RE GOSHAWK 11 - PROP: SHAFT AND COUPLING. We send you herewith drawing LeC.1382 in reply to your…

scan0078 Arguing against a proposed change to the locking mechanism of an oil screw on a Goshawk 11 universal joint.
View original record X4254 Hs. from BY. X4254 GOSHAWK 11. LOCKING OF OIL SCREW ON UNIVERSAL JOINT. I have just noticed in Hs1/LG17821, that you propose to take away the split pin we have used for locking the above piece.…

scan0079 Test results for a universal joint showing continued oil leakage despite a vent scheme.
View original record X.4254 Extract from Hs5/LG23.9.21. UNIVERSAL JOINT. X.4254. We have tested the universal joint with the Vent scheme but we find on the Test Bench that we still get the oil leaking out until the joint…

scan0080 Unresolved issue with oil leakage from universal joints and a proposed solution using grease lubrication.
View original record X.4254. Extract from Hs3/LG5.10.21. LUBRICATION OF UNIVERSAL JOINT. 20 HP. Handwritten: Y4406 / X4254 We have not yet overcome the oil leaking from the universal joints. Several modifications we have…

scan0081 On universal joint failure on a Goshawk 11 car due to poor lubrication, suggesting an oil pump solution.
View original record X4254 To R. from Hs. c. to CJ. c. to E. c. to EY. c. to Da. Hs3/LG29.1.23. GOSHAWK 11. UNIVERSAL JOINTS. X4254 X4348 With reference to the two universal joints I left at W.W. These joints were removed…

scan0082 Page discussing the weakness of an open propeller shaft due to the need for hand-lubrication.
View original record contd:- -2- from the gearbox. The chief weakness with the open propeller shaft is the necessity of hand-lubrication for the joints. hm.

scan0083 Maintenance and performance of Goshawk 11 Universal Joints.
View original record To Hs. from R. c. to CJ. BY. c. to E. Da. X4254 R2/M31.1.23. GOSHAWK 11. UNIVERSAL JOINTS X. 4254. Replying to your Hs3/LG29.1.23., we regret we cannot do more than make the joints oil retaining, and…

scan0084 Oil leak from the propeller shaft on Goshawk models staining the carpets.
View original record To Hs. from Da. X4254 Dal/M30.5.23. GOSHAWK 11. X.4254 X.4255. The Coachbuilding Dept. claim that oil is still flung out of the propeller shaft both at front and rear and is causing them some trouble…

scan0085 Oil leak from the propeller shaft on 20-HP cars.
View original record X4254 Hs. [text obscured] BY: X4254 X4255 EP/Thn4/Hl.6.23. 1 re. 20-HP cars. Oil leak from front and rear ends of propellor shaft. I attach herewith copy of memo which Sp. has sent to Da. at West…

scan0086 Issue with oil leaking from the propeller shaft and damaging the carpets in 20-HP cars.
View original record Da. West Wittering. Copy to EP. Sp2/H/29.5.23. re. 20-HP Cars. A lot of oil appears to be thrown out at front and rear ends of propellor shaft. That from the back end finds it way through the joints…

scan0087 Oil being flung from the Goshawk 11 propeller shaft universal joint.
View original record Da. from Hs. X4254 Hsl/LG1.6.23. X4254 X4255 (crossed out) GOSHAWK 11. PROPELLER SHAFT. The most frequent cause of oil being flung out from the Universal Joint is that an excess amount of oil is…

scan0088 Unlubricated universal joint on a 20-HP chassis, quoting a report on lubrication schedules and wear.
View original record Hs. BY. X4254 EP/Thn7/H5.7.23. re. LUBRICATION OF UNIVERSAL JOINT. 20-HP CHASSIS. You will remember that we have brought to your notice recently the question of lubrication of the universal joint, in…

scan0089 The problem of lubricators on the rear universal of the 20 HP model being knocked off by coachbuilders, with proposed solutions.
View original record X.4254 To Da. from DA/EV. DA/EV3/M3. 9. 23. RE. LUBRICATOR ON REAR UNIVERSAL. 20 HP. X.4254 Apparently considerable trouble is being experienced at the coachbuilders by these lubricators being knocked…

scan0090 Suggestion to replace the current lubricator with a hexagon plug that can be removed with a spark plug spanner.
View original record -2- Rather than have the present lubricator when it is knocked off, it would appear better to use an ordinary hexagon plug which could be readily unscrewed by say a spark- ing plug spanner. DA/EV.

scan0091 Lubricators being knocked off the propeller shaft of the 20HP chassis and a request to test a modification.
View original record Hs. --- X4257 BY/C8/P4.1.24. 20HP CHASSIS. LUBRICATOR ON PROPELLER SHAFT. Sales are again pointing out that they are having a number of cases where the lubricators on the rear joints of the propeller…

scan0092 Issue with the 20 HP propeller shaft lubricator fouling the battery box and proposing a solution.
View original record To Hs. from DA/EV. c. to BY. HN. +4254 DA/EV2/M6.6.24. RE. 20 HP. PROPELLER SHAFT LUBRICATOR. X.4255 X.4254. We are aware that our original suggestion of lubricator in the shaft itself did foul the…

scan0093 Lubrication and oil leakage of the propeller shaft joint, and a proposed solution.
View original record X4257 To DA/EV. from HS. c. to LHS. Hsl/LG3. 7. 24. PROPELLER SHAFT JOINT. X4255 X1457 Tests have shewn that the universal joint on the propeller shaft will retain sufficient oil to keep themselves…

scan0094 Fitment of an aluminium strip for the lubricator on the 20 HP chassis propellor shaft.
View original record X+254/B Hs. BY/C31/H. 22. 7. 24. 20 HP. CHASSIS. LUBRICATOR ON REAR END OF PROPELLOR SHAFT. We have received a memo from Sales in connection with the above matter, in which they point out that your…

scan0095 Oil retention issues with 20 HP Universal Joints and proposing leather gaiters as a solution.
View original record To BY. ) EP. ) FROM R. HS. ) X.4254. R3/M6.9.24. RE. 20 HP. UNIVERSAL JOINTS. I was surprised to hear of trouble with oil retaining. Our scheme and parts should be better than usual, certainly than…

scan0096 Issues and potential cures for over-oiling in 20 HP universal joints.
View original record To BY. from R. c. to CJ. BJ. Hs. Hm. H. EP. PN. X4254 R2/M8.9.24. RE 20 HP. UNIVERSAL JOINTS. X.4254. X.4400. Apparently this trouble is that we make it easy to put too much oil in the joint, more…

scan0097 Conclusion of a report discussing a mechanical joint's oil retention and planned modifications.
View original record -2- Contd. In conclusion, we think there is little to complain about this joint if well managed, and the bodywork well arranged. At the same time Mr. Stent will be sending instructions for various…

scan0098 Use of oil versus grease in 20 HP universal joints and listing previous design considerations.
View original record X.4254. To BY. & HS. from R. c. to CJ. BJ. PN. EP. H. R2/M1.9.24. 20 HP. UNIVERSAL JOINTS. X.4254. Assume we use oil and cannot use grease because it does not replace itself on the bearings. If grease…

scan0099 Modification to the Goshawk 11 universal joints to fix a clearance issue.
View original record X.4254. To BY. from DA. c. to CJ. LHS. Hs. DA3/M14.9.23. GOSHAWK 11. UNIVERSAL JOINTS. X.4254. WE send herewith N.sch.1456 shewing a modification to the position of the Enots lubricator on the rear…

scan0100 Standardisation of the lubricator on the rear universal joint.
View original record RR 755 (10H) (SL391 2-11-23) MP 281297 V4254 COMPLETED 14.10.24. STANDARDISATION of CHASSIS PARTS. Date 10.9.24. Description of Parts. LUBRICATOR ON REAR UNIVERSAL JOINT. Origin. To avoid lubricator…

scan0101 The altered position of the 20 HP rear universal joint lubricator.
View original record Hs/TMW/LG11.9.24. ALTERED POSITION OF 20 HP. REAR UNIVERSAL JOINT LUBRICATOR. N.sch.1456, in conjunction with modified Battery Box to Drg. F.53198. N.sch.1456 was originally fitted to 6-G-11 and has…

scan0102 Print for a Mechanic universal joint for the Goshawk, noting dimensional differences for brazing pieces.
View original record 46254 TO BY. FROM AJS. Copy to - HS. AJS1/M9.6.25. We have received from OY. the enclosed print No. 439-A. of Mechanic universal joint for Goshawk. We are sending this print to you as the pieces for…

scan0103 Performance report on an American Mechanics Joint after extensive road testing over 14,000 miles.
View original record To R. from HA/AJL. c.c. to EJ. WOT. c.c. to RE. E. c.c. to De. BY. c.c. to GV. X5340 Hs/AJLL/T9.11.26. AMERICAN MECHANICS JOINT. X4183 We have run a 20 HP. car (S-CIII) with the propeller shaft fitted…

scan0104 Comparison of the American 'Mechanics Joint' with the company's own, noting its advantages and continued testing on a cardan shaft.
View original record Contd. -2- HS/AJL1/T9.11.26. The absence of the necessity for lubrication during service is a very great advantage. Any modification that reduces the number of points to be lubricated during service…

scan0105 Modifications to a universal joint and propeller shaft, referencing drawing N.sch.2589.
View original record BY. from DA. c. to BJ. Hs. X5340 DA2/M28.4.28. INDIA 3 - UNIVERSAL JOINT AND PROPELLER SHAFT. X.5340 X.4183 Herewith we send N.sch.2589 shewing the 4¼" Mechanic's universal joint made on the lines of…

scan0106 Design and machining of a universal joint, focusing on the assembly of rings and trunnion dimensions.
View original record BY. from DA. c. to BJ. Hs. X.5340 DA4/M19.7.28. INDIA 3 - UNIVERSAL JOINT. Replying to BY/CGH11/G16.7.28., we regret to see that on N.sch.2589 we have omitted to deal with the question of assembling…

scan0107 Standardisation sheet for Mechanics joints on the 20 HP model and its application for the India 1V works.
View original record To DA. from Hs/Rn. X53240 ✓ XL163 Hs/Rm5/LG17.12.28. We have sent a standardisation sheet round for the Mechanics joints on the 20 HP. We are quite aware that the joints we have been running on the 20…

scan0108 Query regarding the recommended lubrication interval for propeller shaft universal joints on 20 HP and S.S. chassis.
View original record Hs. X5340 Mx/MCMl/T13.8.29. X. 5340 X. 7340 Re. Propellor Shafts. Will you please let us know the rate at which the propellor shaft universal joint should be attended to, either number of miles or…

scan0109 Recommendation for propeller shaft lubrication intervals for 20 HP and 40/50 HP chassis.
View original record X5340 filing To Mx. from Hs/Rm. Hs/Rm.4/MJ.14.3.29. PROPELLER SHAFTS. X5340. X7340. With reference to Mx/MCML/T13.8.29. We recommend that the propeller shaft should be lubricated every 5,000 miles or…

scan0110 Rear spring safety stops and the comparative risk of propeller shaft failure on various car models.
View original record Wor. From Hs. LETTER [text is struck through] X5340 Hs.2/MJ.24.1.30. Both on the 20 HP. and Phantom ll we have a safety stop arranged so that if a rear spring breaks no damage can occur. X7340 We…

scan0111 Urgent and expensive production of 25 HP Propeller Shaft Tubes, Piece No. 54035.
View original record Y5-340. To RHC from ROY. c. to Hs. [struck through] c. to DY. [struck through] ROY2/MG14.2.30 25 HP. Propeller Shaft Tubes, Piece No. 54035 The three special Tubes you required in such desperate haste…

scan0112 Vibrations at high speeds in the 25 HP model caused by the propeller shaft.
View original record To R. From Hs. c.c. to Sz. c.c. to Nor. c.c. to E. c.c. to Ps. c.c. to Hy. X5340. Hs. 2/MJ, 8.9.30. 25 HP. VIBRATIONS. X. 634. X. 5340. We have proved definitely that one cause of the vibrations we…

scan0113 Replacement of a faulty propeller shaft and a request to test the old tube.
View original record X5340. To RIC. From Hs/Rn. Hs/Rn. 2/MJ.10.9.30. 12-C4. The propeller shaft on this car is now running rather badly out of truth. We wish to replace it with a standard propeller shaft. If it can be…

scan0114 Propeller shaft specifications to address vibrations in the 20/25 HP model.
View original record X5340 Hs. } From Da. By. } c. Sg. Wor. Da2/M11.9.30. X.634 X.5340 20/25 HP. VIBRATIONS. With reference to Hs2/MJ8.9.30. R. instructs that we should try an increased diameter propeller shaft, if…

scan0115 Request to instruct six sets of Propeller Shaft G.54300.A for experimental test purposes on the 20/25-HP Chassis.
View original record X5340. To. G.O. c. Hs. c.c R.H.S. BY/TWD2/E.20.9.30. 20/25-HP. CHASSIS. UNIVERSAL JOINT & PROPELLER SHAFT. SECTION 6110. Will you kindly instruct six sets of the undermentioned piece for Experimental…

scan0116 Standardisation of a 2.5' propeller shaft for the 25 HP model to prevent whirling.
View original record RR 758 (10H) (3-7-30) BM. 6/2571. X5340. COMPLETED 11.2.31. STANDARDISATION of CHASSIS PARTS. Date 17.10.30. Description of Parts. 2.5" Propeller Shaft for the 25 HP. X No. 5340. Drawing No. Part List…

scan0117 Standardisation document concerning the fitting of a new part to the 'T' Series chassis.
View original record STANDARDISATION of CHASSIS PARTS The number of the first chassis on which the new part will be fitted: 'T' Series. Date when chassis will be handed to test. 18th. April 1931. Cost of scrapped…

scan0118 Propeller shaft whirling issues on a 25 HP model, recommending an increase in shaft diameter.
View original record To R. From Hs/Gry. c. to Sg. Wor. c. to E. Da. c. to By. X5340 PROPELLER SHAFT 25 HP. when running 18.G.IV. with the cast iron unit we found that the car was considerably rougher in top gear than at…

scan0119 Agreeing to increase the diameter of the 25HP propeller shaft due to a whirling issue.
View original record X5340 Hs. DA. )FROM R. E. BY. ) (At Le Canadel.) R1/M25.3.31. C. to - SG. WOR. 25HP. PROPELLER SHAFT. I quite agree to the propeller shaft being increased in dia. from 2.5 to 3". Evidently the extra…

scan0120 Instruction to replace the 20/25 HP propeller shaft sliding joint oiling plug with an Enots lubricator.
View original record Y5340. To By. From Hs/Lid. c. to By/NM. Hs/Lid.8/MJ.8.7.31. 20/25 HP. PROPELLER SHAFT. Will you please instruct that the oiling plug on the 20/25 HP. Propeller shaft sliding joint is replaced by an…

scan0121 Layout of the frame, transmission, and springs for the J.3. model.
View original record BY. FROM DA. C. to SG. WOR. HS. X5340 DA1/M7.9.31. X.5380 X.5410 X.5430 X.5340 X.5350 J.3. - LAYOUT OF FRAME TRANSMISSION, & SPRINGS. We send herewith N.sch.3335.shewing the frame, transmission C/L.…

scan0122 Required diameter for propeller shafts to prevent whirling at high RPMs.
View original record To R. from Hs/Gry. c.c. to WCE. Wor. c.c. to Eg. R. c.c. to Da. Hy. X5340 Hs/Gry.7/RT.4.11.31. X5340 PROPELLER SHAFTS. Referring to Oal/M.7.9.31. we consider it essential to have a 3" diameter shaft…

scan0123 Letter from Cadillac Motor Car Company regarding propeller shaft information.
View original record C.O.P.Y. CADILLAC MOTOR CAR COMPANY, DETROIT, MICHIGAN October 21, 1931. Mr. E.W.Hives, Rolls Royce Ltd., Derby, England. Dear Sir: Subj: Propeller Shaft. Replying to Rs/Cry/2/AJ I attach copy of note…

scan0124 Page discussing shaft balancing tolerances and tube thickness specifications.
View original record -2- (5) Oakland cars run through within 3/4 oz. inch for balance and have to run smoothly up to 4000 r.p.m. (6) I did not know the thickness of the P.II shaft, but it scaled 1/8". You will note they…

scan0125 Letter from Mechanics Universal Joint Company regarding drive shaft tube critical speed formulas.
View original record COPY. MECHANICS UNIVERSAL JOINT COMPANY. Division of Borg-Warner Corporation ROCKFORD, ILLINOIS October 19, 1931. C.A.S. Engineering Company, 8-139-140 General Motors Bldg. Detroit, Michigan.…

scan0126 Mathematical comparison and specification for a J.3. propeller shaft.
View original record X5346 BY. FROM DA/EV. DA/EV1/M5.11.31. Copy to - HS. J.3. PROPELLER SHAFT. We thank you for your BY/G31131. Our suggested 2.5" dia. for J.3. is based on the mathematical comparisons with the existing…

scan0127 Propeller shaft and axle clearances for a 25HP chassis.
View original record (2) With reference to N.scheme 3352, we agree to .200 clearance between the propeller shaft - 2.5 dia.- and the hole in the sheet metal 3rd. crossmember. This may be obtained by raising the upswept…

scan0128 The decision to use a 3-inch propeller shaft on the J.3. model and the required modifications.
View original record BY. FROM DA X5340. C. to SG. HS. J. 3. PROPELLER SHAFT. DA5/M.6.11.31. (5340. We have looked into the question of propeller shafts and though we think/2.250 shaft we have proposed is as good as a 3"…

scan0129 Standardisation of a 3.00' diameter propeller shaft to overcome periods and whirling.
View original record RR 785 (10H) (S459, 24-10-30) 6/3185. X5340. COMPLETED 7. 3. 32. STANDARDISATION of CHASSIS PARTS. Description of Parts. PROPELLER SHAFT 3.00" DIA. Origin. To overcome periods and whirling of shaft.…

scan0130 Fitting of a new part to a chassis, including test date and associated costs.
View original record STANDARDISATION OF CHASSIS PARTS The number of the first chassis on which the new part will be fitted............ 181 in 'T'. Date when chassis will be handed to test........... 12.3.32. Cost of…

scan0131 Failing 20/25 Brake Servo, discussing material failures and potential remedies.
View original record X 5340 To Hs. from E. c. By. Da. re. 20/25 Brake Servo. E.5/HP.5.9.32. X 4117 X 5370 We had R. through personally on the telephone this afternoon, and he wishes me to tell you that they are having…

scan0132 Providing preliminary figures on the end force exerted in the sliding splined joint of the propeller shaft.
View original record X5340 To DA. from Hs/Rm. c. BY. E. Hs/Rm.15/KT. 8.9.32. With reference to your query as to the amount of end force exerted in the sliding splined joint of the propeller shaft due to the pumping of the…

scan0133 Test graph plotting sliding effort against torque for a 20/25 HP propeller shaft spline.
View original record PERE PROP SHAFT SPLINE TEST 20/25 HP SHAFT USED. SLIDING EFFORT LBS. 140 120 100 80 60 40 20 0 TORQUE LB. FT. 10 20 30 40 50 60 HS. 703 8-9-32

scan0134 Standardisation of parts document for needle bearings in propeller shaft joints.
View original record RR 785A (SH) (52674, 16-10-33) BM. 3/262/6. X5340 COMPLETED 24.11.33. 20/25 STANDARDISATION of PARTS. Date 2.11.33 Description of Parts. NEEDLE BEARINGS IN PROPELLER SHAFT JOINTS. X No.5340. Drawing…

scan0135 Standardisation of parts for needle bearing propeller shaft joints filled with Mobilgrease No. 2.
View original record RR 788A (SH) (S2674, 16-10-33) BM. 3/262/6. X1300 Completed 23.1.34 20/25 STANDARDISATION of PARTS. Date 8.1.34. Description of Parts. NEEDLE BEARING PROP. SHAFT JOINTS FILLED WITH MOBILGREASE NO.2.…

scan0136 Request to produce two propeller shaft dampers and investigate modifications for fitting one to chassis 21-G-IV to address over-run gear rattles.
View original record To RHC. X 5340 Hs/Gry.22/KW.20.4.34. Over-run Gear Rattles. Will you please put in hand a further 2 propellor shaft dampers to EX.13099. One of these we shall probably want to fit to 21-G-IV, so will…

scan0137 The rectification of gearbox rattles on chassis GEX.68, caused by excessive grease and end float.
View original record COPY: To Hs/Rm. from RHC. RHC.9/BE7.5.34. RE: CHASSIS GEX.68. On removing the propeller shaft from the above car for the purpose of fitting a slipper wheel as requested, two facts came to light which…

scan0138 Investigation of gearbox rattles on chassis GEX.68, which were resolved by reducing grease and end float.
View original record Write MX- To Hs/Rm. from RHC. RE: CHASSIS GEX.68. On removing the propeller shaft from the above car for the purpose of fitting a slipper wheel as requested, two facts came to light which it was…

scan0139 Propeller shaft sliding joints and the effect of removing grease on transmission overrun rattles.
View original record X5340 To Mx. from Hs/Rm. c. Hd. c. RHC. Hs/Rm.2/KW.10.5.34. Attached is a copy of a report from RHC. on propeller shaft sliding joints. We believe there is something in this. We have now removed…

scan0140 Recommendation for Vacuum Motor Grease No. 2 for 20/25 & 40/50 HP chassis universal joints with needle type bearings.
View original record X5340 To By/Cgh. Hs/GWH.13/KW.30.5.34. 20/25 & 40/50 HP. Chassis Universal Joints. With the introduction of needle type bearings on the above cars, the Vacuum Motor Grease No. 2 should be recommended.…

scan0141 Note on the damping springs for the Propellor Shaft Damper on the 20/25 HP and Bentley chassis.
View original record To By: X5340 Hs/Gry.10/KW.8.9.34. Propellor Shaft Damper, N.Sch.3911, for 20/25 HP. Chassis. The damping springs we used on the 10,000 miles car were to Piece No. G.56816. These gave a load of 5 lbs.…

scan0142 Standardisation of a propellor shaft damper to delete over-run rattle.
View original record RR 755A (SH) (57394. 30-1-34) BM 3/787/1. COMPLETED 3.11.34. 20/25 STANDARDISATION of PARTS. Date 4-10-34 Date 7.9.34. X No. 5340. Drawing N. Sch. No. 3911. Part List Description of Parts. PROPELLOR…

scan0143 Cost estimate and production notes for a new damping feature on the Bentley 'G' series chassis.
View original record Est. cost of extra jigs, tools and equipment (Sft/Ws.20.9.34) £128.0.0. This includes also the new damping feature on Bentley std. sheet X.237. Could be brought on to production at 1st chassis in "G"…

scan0144 The slip load for the propeller shaft damper on the 20/25 and Bentley chassis.
View original record X 5340 To By. c. to Mx. Hs/Gry.11/KW.16.1.35. Propellor Shaft Damper - 20/25 & Bentley. The load at which the flywheels of this damper should slip for either chassis is between 4½ and 5 lbs. at 17¼"…

scan0145 Requesting a note be added to the arrangement drawing for a 20/25 HP chassis propeller shaft damper.
View original record X5340 BY/TWD [TWD is struck through] c. Sft/Mr.Scott. c. Hs/Gry. [Line scribbled out] BY/SS.24/J.17.1.35. 20/25 HP. CHASSIS - PROPELLER SHAFT DAMPER GL.722.…

scan0146 Propeller shaft modifications for the 20/25 model, comparing performance to the Bentley.
View original record To E. from HDY. c. Hs/Da. HDY.1/HP.27.5.35. Propeller Shaft. 20/25. Recent modifications to the axle and tyre size have increased the length and speed of the propeller shaft. We have set out the…

scan0147 Comparing propeller shaft specifications and performance for the 25/30 HP car.
View original record HS/Rm (crossed out) 1537 C.BY. G.W. Hancock Rm Please let me know Rm E/Lid.2/HP.20.12.35 Propeller Shaft for 25/30 HP. Car. The propeller shaft for the 25/30 HP. chassis will be 1.6" longer than the…

scan0148 The lack of propeller shaft vibration for the 25/30 HP car during a 10,000-mile test.
View original record X537 To E. c. to By. c. to Hs/Rm. Hs/GWH.6/KW.24.12.35. Propellor Shaft for 25/30 HP. Car. Reference E/Lid.2/HP.20.12.35. We had no reports during the running of 21-C-IV of propellor shaft vibration…

scan0149 On the performance of a propeller shaft for the 25/30 HP car during a 10,000-mile test.
View original record To Ex. c. to Ey. c. to Hs/Rm. X537 Hs/GWH.6/KW.24.12.35. Propellor Shaft for 25/30 HP. Car. Reference E/Ltd.2/HP.20.12.35. We had no reports during the running of 21-G-IV of propellor shaft vibration…

scan0150 Notice regarding the retention of the propellor shaft damper on 20/25 HP models.
View original record x 537 To By. Hs/Rm.4/KW.17.1.36. Propellor Shaft Damper - 20/25 HP. Please note that if any clutch other than the Borg & Beck is fitted to the large bore 20/25's, the propellor shaft damper will have…

scan0151 Road test report on the 25/30HP chassis detailing the propeller shaft hitting the crossmember on rebound.
View original record c.HS/Rm X537 from Mx. Mx15/T20.4.36 25/30HP Chassis. With regard to the question of the clearance of the propeller shaft and the slotted crossmember on rebound, we have now had an opportunity of…

scan0152 Transmission vibration issues on the 25/30HP chassis and the proposed solution of fitting a propeller shaft damper.
View original record x537 [handwritten] Rm [handwritten signature] From MX. EX/T4.8.36 25/30HP TRANSMISSION We occasionally experience trouble with chassis on test due to transmission vibration which shows up as a…

scan0153 Requesting the reintroduction of the propeller shaft damper for the 25/30 HP model.
View original record To HY. C. to E. C. to Ey. C. to MX. C. to Mft. X537 HS/Rm.1/JH.8.4.36. 25/30 HP. Transmission. Referring to Mx.1/T.4.8.36. We should like the propeller shaft damper bringing into production again on…

scan0154 Requesting to change the material of 20/25 Propeller shaft damper hubs to RR.53 to reduce weight.
View original record 537 HPS. from Rm/Gry. Rm/Gry3/R.10.11.36. PROPELLER SHAFT DAMPERS. Will you please put in hand 3 hubs of the 20/25 Propeller shaft dampers in RR.53, instead of the present brass. The object of this is…

scan0155 Change in the manufacturing process for the 25/30.HP. Damper Flywheel to save costs.
View original record Grey 537 E. Rm. C. HS. C. Bf. from RHC/GH. RHC/GH.6/IB.16.11.36. re. 25/30.HP. - Propeller Shafts ------------------------------ We suggest Damper Flywheel, Piece Number G56940/1 might be produced…

scan0156 Materials for the propeller shaft damper flywheels on the 25/30 HP chassis.
View original record 537 RHC. [struck through] c.B. [struck through] c. Rm. BY/Cgh.11/W.20.11.36. 25/30 H.P.CHASSIS : PROPELLER SHAFTS. With reference to RHC/GH.6/IB.16.11.36, we do not consider it would be advisable to…

scan0157 Specification document for the 25/30 Propeller Shaft, detailing its components and comparisons.
View original record 537 Y. E. Da. Rm. HPS. E/HDY.1/HP.2.4.37. 25/30 Propeller Shaft. We send herewith N.Sch.5103 giving particulars for the Hardy Spicer shaft for this car. The shaft is exactly the same as for the…

scan0158 Secret memo regarding piston stops, recommending they be filed below the surface and that the practice of counterboring the stop pin hole be discontinued to avoid leakage.
View original record X.5040 To R. from E. c. to CJ. HS. BY. S E C R E T. E5/M23.3.25. I N D I A. PISTON STOPS. X.5040 Further to our remarks concerning the above in E1/M23.3.25., we think the stops ought to be filed away…

scan0159 Secret memo sending a drawing for an India Piston.
View original record X.5040 To BY. from E. c. to CJ. Hs. S E C R E T. E2/M23.3.25. INDIA PISTON. We send herewith drawing LeC.2036., as mentioned in our memo. E1/M23.3.25 to R. E.

scan0160 Secret memo regarding a piston modification for the 'India' specification 20 HP engine.
View original record X. 5040 To R. from E. c.c. to CJ. Hs. BY. S E C R E T. E1/M23.3.25. 'I N D I A' PISTON. Please find attached a blue print of drawing LeC.2036 shewing a 20 HP. piston with a stronger diagonal web on…

scan0161 Piston design, specifically scraper rings and pin sizes.
View original record 45040 To E. & RG. from R. c. to CJ. DA. BY. c. to HS. SECRET. R3/M31.3.25. EAC. AND INDIA. RE. PISTONS. X.8040 X.5040 I think we ought to add no more weight than we are forced to do. My all-scraper…

scan0162 Design and materials for piston pins for various engines, proposing a spring ring device.
View original record To RG. Hs. from R. c. to BJ. Wor. BY. X5040 R2/M28.8.26. RE. PISTON PINS. CONDOR, FALCON 10., PHANTOM AND GOSHAWK. X.5040 X.2603 X.5040 X.3996 We believe that all the pistons should be fitted with the…

scan0163 Standardisation of a piston with 5 narrow rings to replace the existing 3 narrow and 1 wide ring design.
View original record RR 782 REVISED (10H) (DE 649 9-12-26) BM. 2/1187. Handwritten Top: x5040, Complete/ck 25.8.27, 57 STANDARDISATION of CHASSIS PARTS. Date 6.4.27 Description of Parts. PISTON WITH 5 NARROW RINGS -…

scan0164 Standardisation of chassis parts form detailing the first chassis for a new part, test date, and tooling costs.
View original record STANDARDISATION of CHASSIS PARTS Ch. S. 4. (1). The number of the first chassis on which the new part will be fitted. "L" Series. (2). Date when the chassis will be handed to test. 8/10/27. (3). Cost…

scan0165 Instructions for modifying the gudgeon pin fitment on 20 HP engine pistons to prevent distortion.
View original record X5040 E.Dept. Mr. Sit. c.Hs. ******** BYS/H. 30.8.27. ************** 20 HP. ENGINE. PISTONS. RE FIT OF GUDGEON PIN. ******************************************* I wish to confirm my verbal instructions…

scan0166 Design changes and die-casting methods for cross web pistons for the 20 HP engine.
View original record X. 5040 BY. from E. c. to BJ. Hs. E1/M22.12.27. INDIA PISTON. We send you herewith LeC.2500 shewing the cross web piston for use in connection with the latest 20 HP. developments. Owing to the change…

scan0167 Providing drawings for piston components for the 'India' project and instructions for assembly.
View original record c. to Hs. X5090 BY/CS3/DB.11.1.28. Re India - Piston - Sec:5040. Please receive herewith prints of each of the following drawings, detailed from LeC.2500:- E.54666 - Piston. E.54672 - Spring Ring.…

scan0168 Trialling die-cast car pistons made from Halls alloy for 20 HP and 40/50 models.
View original record To BY. from Hs/Rm. c. to RHC. Handwritten annotation: [strikethrough]X5040[/strikethrough] X5040 Hs/Rm3/LG1. 2. 28. With reference to the car pistons to be made in Halls alloy. We would like to try a…

scan0169 Proposal to trial rectangular piston rings on the 20HP engine to address overoiling issues.
View original record By c Hs X5040 Mx4/T27.2.28 re 20HP Pistons With the strutted cylinders, we have very little trouble with overoiling, and we should like, if you agree, to try the rectangular type of piston ring again.…

scan0170 Recommending the use of hardened and spring tempered high duty alloy steel over case-hardened steel for piston pins.
View original record E. Hs. BY. OY. RG. from R. X5040 R2/M15.3.28. c. to BJ. Wor. EP. F1. AERO ENGINES, 20 HP, & 50 HP. CHASSIS X.8040 X.3996 PISTON PINS. X.7040 X.685 X.5040 It should be realised that we already know…

scan0171 The material of piston pins and a request for further fatigue tests.
View original record E. RG. Hs. BY. from R. HL. c. to BJ. Wor. Fl. X5040 R7/M7.4.28. ALL ENGINES - AERO & CAR - PISTON PINS. X.5040 X.8040 X.7040 X.3996 I understand that we are making no case-hardened pins but that they…

scan0172 Strengthening modifications for the 20 HP piston, including a special taller version for 'India 3'.
View original record BY. from E. c. to BJ. Hs. X.5040 E3/M14.7.28. 20 HP. PISTON. We have not yet seen the broken pieces of the 20 HP. piston, but we send you herewith LeC.2575 shewing this piston strengthened up in the…

scan0173 Confirmation of a wire communication regarding 'Twenty' piston issues, with instructions to scrap and replace with a strengthened design.
View original record X5040 CONFIRMATION OF WIRE. ORIGINAL WW. 16.7.28. RECEIVED HIVES. ROYCAR. DERBY. MADE AT CROXLEY TWENTY PISTON ASSUMING BREAK AS PHANTOM CONSIDER PRESENT DANGEROUS SCRAP AND REPLACE WITH STRENGTHENED…

scan0174 Relaying the contents of a telegram from Royce concerning dangerous Phantom pistons.
View original record X5040 To BY. from Hs. c. to Wor. Hs1/LG17.7.28. X5040 from R. :- We give below a copy of a telegram we have received "HIVES - TWENTY PISTON ASSUMING BREAK AS PHANTOM CONSIDER "PRESENT DANGEROUS SCRAP…

scan0175 Piston breakage on a 20 HP chassis and proposing design modifications for rings and piston strengthening.
View original record BY. from E. c. to BJ. Hs. #EH Y5040 E6/M1 7.7.28. 20 HP. PISTON. X.741 X.5040 We have not yet seen any report, or the broken pieces, of the piston which went to bits on the low geared 20 HP. Chassis,…

scan0176 Failed piston and scraper ring design for the 20 HP car.
View original record To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to BY. 20 HP. PISTON. The section of the piston which failed in 10-G-111 car is identical to the ones fitted to the 2400 20 HP. cars which have been…

scan0177 A broken 20 HP piston from an experimental car being sent for inspection.
View original record To BP. from Hs. c. to Mt. Stores. Y5040 Hs5/LG19.7.28. 20 HP. PISTON. We are sending to the Stores for despatch to R. at WW. :- 1 20 HP. piston. This piston has broken on an experimental car - for R's…

scan0178 New and experimental piston designs for the 20 HP and Phantom models.
View original record Hs. BY. from R. c. to EJ. Wor. X5040 R3/M20.7.28. 20 HP. PISTONS. X.5040 X.7040 X.741 We have already sent you an ordinary type piston strengthened, and we have also sent you a group of designs for…

scan0179 Changing from 'L' shaped to plain rectangular piston rings for the 20 HP chassis.
View original record R. C. C. Wor. c. Hs. X5040 BY2/G.20.7.28. 20 HP. CHASSIS - PISTON RINGS. -------------------------- We have made one or two attempts on production to get away from the 'L' shape ring, and whilst we…

scan0180 Confirmation of a telegram discussing piston ring solutions for the Twenty HP and Phantom models.
View original record CONFIRMATION OF TELEGRAM. X5040 X741/X7040 WW. 23. 7. 28. HIVES. ROYCAR. DERBY. VERY ANXIOUS ABOUT PISTON RINGS. UNDERSTAND PLAIN RING WILL BE USED AT ONCE ON TWENTY HP. PRODUCTION BUT PHANTOM STILL…

scan0181 Pedestal piston design for 'India 3', featuring an Invara steel control ring to prevent piston slap.
View original record BY. from E. c. to BJ. Hs. X 5040 PEDESTAL PISTON -> INDIA 3. X.5040 X.741 We send herewith Lec.2578 shewing the above. This piston should be tested with the scraper ring at the bottom, and also in an…

scan0182 Fitting and testing of pistons and rings for 20 HP and Phantom engines.
View original record To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to BY. 45040 Hs2/LG25. 7.28. PISTONS AND RINGS. X. 7040 X. 5040 X. 741 20 HP. 12-G-4 engine is being fitted with pistons to LeC. 2577 and we anticipate…

scan0183 Performance and design of piston rings, including the phasing out of 'L' shaped rings.
View original record Hs. BY. from R. c. to BJ. RG. Fl. X5040 R6/M20.8.28. PISTON RINGS. X.741 X.5040 I am very pleased to hear that the perfect circle piston ring with slight modifications promises to fill the duty of a…

scan0184 Decision to switch from 'L' shape to plain square section piston rings for 20 HP engines.
View original record C.C. BY/CS. [struck through] c. Hs. ----- X5040 BY1/G.27.8.29. 20 HP. PISTON RINGS. ------------------- The Test Department have/been running a number of engines with plain square section rings on the…

scan0185 The addition of oil holes to the gudgeon pin bosses of 20HP pistons.
View original record By Hs X5040 Mx4/T4.9.28. RE PISTONS With reference to the addition of oil holes to the gudgeon pin bosses, recently instructed for the Phantom Piston. We think that a similar modification to the 20HP…

scan0186 Car modifications addressing issues with slipper drive, engine mounts, pistons, and suspension shudder.
View original record To R. from Hs. c.c. to BJ. Wor. c.c. to E. DA. c.c. to BY X5040 Hs3/LG4.9.28. 12-C-4. X5770 X4665 We have now made this car satisfactory with regard to :- (1) SLIPPER DRIVE. We have got the correct…

scan0187 Immediate modification instruction for 20 HP pistons concerning oil flow around the gudgeon pin.
View original record E. Dept. X5040 BY2/G.5.9.28. C. Hs. 20 HP. PISTONS. It will be necessary to apply a simple modification to the 20 HP. piston to that recently instructed on the Phantom. The modification in question is…

scan0188 Gas-tightness of 4-pinned rings on 20 HP pistons.
View original record Hs. from R. c. to BJ. Wor. BY. X5040 R4/19.9.28. 20 HP. ETC. PISTONS. G.4. X.5040 X.5230 X.741 X.5050 Although we have no further interest in the cross web pistons tried on the above car, one should…

scan0189 Valve lubrication issues on engine 12-G-4 causing unreliability at slow speeds.
View original record Hs. from R. & E. c. to BJ. Wor. PN. CWB. X5040 R3/M16.10.28. VALVES. X. 5060 X. 5040 X. 5770 Our experience with 12-G-4 says that the valves are not getting enough oil, especially the inlets, because…

scan0190 Design and specifications of pistons and piston rings.
View original record Hs. from R. c. to BJ. Wor. By. X5040 R5/M18.10.28. RE. PISTONS. X.8040 X.5040 X.7040 X.741 We conclude that you do not want a lower scraper ring. We agree we only put it on to reduce the over-oiling…

scan0191 Desired features and dimensions for Phantom and 20 HP pistons.
View original record contd :- -2- of the pistons we wish to get adopted :- We want 3 narrow rings and a perfect circle ring all pinned as shewn on Lec. 2490 for both chassis. We understand you are following Lec. 2577 type…

scan0192 Issue of pistons seizing on new 40/50 and 20 HP cars.
View original record EP. from Hs. c. to BY. Wor. c. to Mx. X5040 Hsl/LG25.1.29. 40/50 AND 20 HP. PISTONS SEIZING ON NEW CARS. X. 8040 X. 5040 A short time ago we sent a note to the Repair Dept. to ask them whether they or…

scan0193 Secret internal memorandum discussing potential engine modifications to improve 20 HP car performance.
View original record X5040 R. from E. SECRET. E1/M15.4.29. c. to Sg. Wor. PN. Hs. Ev. EP. DA. 20 HP. CAR PERFORMANCE X5770 X5050 X5010 X4538 We are quite in agreement that it is highly desirable to reduce the overall…

scan0194 Calculations comparing engine performance based on increased capacity, weight savings, and a lower axle ratio.
View original record -2- Taking the figure for litres/ton mile supplied by Hs., the 20 HP. is 2820, for 33 cwts total weight. Chassis weight equals 24 cwt: Increased capacity (3.2 bore).. 14% Saving in weight, take…

scan0195 Proposed alterations to cylinder studs for a larger 3.200' bore engine, including stress analysis.
View original record R. from E. c. to SG. Wor. c. to Hs. BY. X5040 E1/M.8.4.29. G.4. LARGER BORE. X.5050 X.7040 We attach herewith blueprint LeC.2695 shewing proposed alterations for 3.200" bore. The extra condition that…

scan0196 Proposed alterations to cylinder studs for a larger 3.250' bore engine.
View original record X5040 R. from E. SECRET El/M18.4.29. c. to Sg. Wor. G. 4. LARGER BORE X5050 HS. By. We attach herewith blueprint LeC. 2695. shewing proposed alterations for 3.250" bore. The extra condition that the…

scan0197 Reporting on the improved performance of a 20 HP chassis fitted with 3.200 diameter pistons.
View original record To R. from Hs. x5040 Hs2/LG23.4.29. c. to Sg. Wor. c. to E. DA. c. to BY. 20 HP. CAR. x5770. We have had a short run on a 20 HP. chassis with the engine fitted with 3.200 dia. pistons. The performance…

scan0198 Design of piston pin retaining circlips for 'China' chassis.
View original record X. 3040 R1/M4.5.29. BY. from R. c. to SG. Wor. c. to Hs. RG. PISTON FOR 'CHINA' CHASSIS. --------------------- We send you herewith LeC.2698 shewing the 3.25" dia. piston for 'O' series of twenties.…

scan0199 Confirmation of a wire message with instructions on fitting a turbulent head to a sixteen-G-four engine.
View original record X 5040 CONFIRMATION OF WIRE. X5050 X5770 X5040 HIVES, ROYCAR, DERBY. WW. 29. 5. 29. FIT TURBULENT HEAD FOR SIXTEEN-G-FOUR EVEN IF SMALLER BORE BUT SUGGEST THREE POINT TWO WITH THE THREE POINT TWO FIVE…

scan0200 Inquiring about the production and testing status of various car piston models.
View original record X5040 To RHC. from Hs/Tsn. Hs/Tsn.2/MJ.17.9.29. CAR PISTONS. X7040 X5040 We should like to know the position of the following piston, i.e., whether made and tested, made, or making. S.S. ==== E.79500…

scan0201 Progress update on 'CHINA' pistons and subsequent handwritten annotations.
View original record HS. FROM R. x5040 R3/M30.9.29. re. 'CHINA' PISTONS. I should be glad to know how far you have progressed with the pistons we made for the above - LeC. 2698. - which should be lighter than the pistons…

scan0202 Summary of car piston designs and their technical features.
View original record X 2040. Hs. from Hs/Tsn. Hs/Tsn2/AD4.10.29. POSITION OF CAR PISTONS DESIGNS WE HAVE RECEIVED ARE :- S.S. Lec. 2737 - E.79500. Features :- (1) 4.125" long (Long skirt) Lec. showed 4.000" skirt;…

scan0203 Piston and ring specifications for 20 HP engines with 3.000' and 3.250' bores.
View original record -2- 20 H.P. 3.000" BORE. Lec.2577. Features: (1) Alteration to webs in head : one nearer split side made thick; other one thin. (2) 4 rings all stopped, instead of 5 rings 3 stopped. (3) Groove milled…

scan0204 Confirming the resolution of an over-oiling issue with Goshawk Pistons.
View original record c. Hs. X5040 BY/CS2/IG.12.10.29. Re Goshawk Pistons. -------------------- With reference to your memo. RHC6/MS4.10.29, re instructing parts to LeC.2577 for 3.250 bore Cylinders, for dealing with…

scan0205 Trial of 'Perfect Circle' type piston rings on the 'China' engine to address over-oiling issues.
View original record To Hy. From Hs/ACL. c. to Wor. X5040 Hs/ACL.1/MJ.31.12.29. PISTON RINGS - STD. 'CHINA' ENGINE. We are anxious to try some Perfect Circle type oil scraper rings on the Std. type 'China' pistons,…

scan0206 Instructions regarding an experiment to replace a piston and fit a channelled scraper ring to a 20HP Chassis.
View original record To. KHC. c. Hs/ACL. Y5040 BY/CS3/IG.16.1.30. Re 20HP Chassis - Piston - Sec: 5040. Please receive herewith two blueprints of - E.55714 Piston which replaces E.55317. Will you please instruct as…

scan0207 Requesting the modification of 20 HP piston drawings to use Perfect Circle type piston rings.
View original record X5040. BY. From Hs/ACL. Hs/ACL.1/MJ.21.1.30. Re. 20 HP. PISTONS. 5.25/1 COMPN. RATIO. We should like all the 20 HP. pistons which are arranged to give 5.25/1 compression ratio to have the Perfect…

scan0208 Requesting modifications to a 20 HP engine to achieve variable compression ratios for testing.
View original record To RHC. From Hs/Rn. c. to CHP. 85040 Hs/Rn. 2/MJ.18.3.30. 20 HP. UNIT. We want to arrange a variable compression 20 HP. engine between the limits of 5.25 and 6 - 1. Will you please put through a set…

scan0209 The successful testing and production of pistons in R.R.53 material for Phantom II and 20/25 HP models, requesting a standardisation sheet.
View original record COPY. X5040. HS. BY2/J. 2.9.30. X. 7040. X. 5040. Phantom ll and 20/25 HP. Pistons in R.R.53 Material. We have now had a report from the Test Department that the 20 sets of pistons produced in the…

scan0210 Out-of-date practices on piston ring clearances for the 25 HP engine.
View original record X5040 RHC. from Hs/Rm. Hs/Rm.1/AD27.11.31. PISTON RINGS 25 HP. We find that our practice on piston rings is rather out of date as regards clearances. We took this matter up with the Wellworthy people…

scan0211 Standardisation of chassis parts, specifically pistons with a 5.75 to 1 compression ratio.
View original record RR 783 (10M) (19120. 13-10-31) BM. 3/7585. X5040 COMPLETED 16.2.32. STANDARDISATION of CHASSIS PARTS. Description of Parts. Pistons 5.75 to 1 Comp. ratio Origin. To increase compression for higher…

scan0212 Introduction of a new part to a chassis, including costs and test dates.
View original record STANDARDISATION OF CHASSIS PARTS The number of the first chassis on which the new part will be fitted......... 176 in 'T' Date when chassis will be handed to test 12. 3. 32. Cost of scrapped material,…

scan0213 Practice of pinning piston rings in aero and car engines.
View original record RG. HS. ) FROM R. E. ) C. to SG. WOR. Handwritten: X5040 R2/M24.5.32. X. 7040 X. 5040 X. 3996 X. 4465 PISTONS - AERO. & CAR ENGINES. For over 25 yrs we have been pinning our piston rings, but we…

scan0214 Tests carried out on pistons to determine stiffness and sustained load.
View original record To E. from Hs/Rm. +5640 Hs/Rm.1/KT.1.5.33. We have carried out one or two tests on pistons with a view to determining the stiffness at various points, and the load sustained before taking a permanent…

scan0215 Load tests performed on a 20/25 piston skirt to determine its failure point.
View original record E.57122. 20/25 PISTON SKIRT TESTS. With the piston supported as in previous tests (8.8.32) the deflections and permanent sets were measured, the loads being applied first at the crown end, then at the…

scan0216 Series of graphs and tables detailing the results of piston skirt pressure tests.
View original record PISTON SKIRT PRESSURE TESTS M.S. 686 LOAD DISTRIBUTED OVER FULL LENGTH OF SKIRT TOTAL LOAD - LB DEFLECTION - INS. LOAD - LB 40/50 HP 20/25 HP PERE II CONTRACTION OF SKIRT GAP UNDER LOAD OF 100 LB…

scan0217 Graph showing the results of deflection and permanent set tests on a 20/25 HP piston skirt under increasing load.
View original record E.57122 20/25 HP. PISTON SKIRT TESTS DEFLECTION & PERMANENT SET - INS. LOAD - LB. DEFLECTION LOWER END CENTRE CROWN END PERMANENT SET LOWER END CENTRE CROWN END AREA OF LOAD CONCENTRATION .250 .625…

scan0218 Limitations of spring skirt chassis pistons and proposing new test designs.
View original record To Sg. } from E. Wor. } c. to Hs. By. E.8/HP.11.5.33. X.4553. X.7040. X.5040. X.4027. CHASSIS ENGINE PISTONS. From the results we have obtained with running engines at high speeds on Bensport, Phantom…

scan0219 Requesting the manufacture of one set of pistons for Bentley & 20/25 models.
View original record X5040 To RHC. Hs/Mths.14/KW. 26.9.34. Bentley & 20/25 Pistons. Will you please have one set of pistons made to each of the attached drawings, V.B.46 and V.B.50. Both pistons can be made from existing…

scan0220 25-29 HP split skirt piston for a large bore engine.
View original record X536 BY. c. Hs/Rm. RHC E/JNR.1/HP.10.10.35. re 25-29 HP. Pistons. 1.11.35. We send you herewith:- LeC.4744 showing a split skirt piston 3.5" diameter for the large bore engine. It is considered that…

scan0221 The discontinuation of semi-split type pistons and their associated grinding tackle.
View original record To RHC, _x5040_ Hs/Rm.12/KW.12.10.34. Semi-Split Type Pistons. We recently sent some instructions through for semi-split pistons for the Bentley and 20/25 with modified grinding. E. has now agreed…

scan0222 Recommendation to standardize the longer skirt Bentley piston on the 20/25 HP model.
View original record To E. c. to Wor. c. to By. X5040 Hs/Rm.11/KW.13.11.34. 20/25 HP. Pistons. It will be recalled that the Bentley piston has a longer skirt than that at present fitted to the 20/25. We think that this is…

scan0223 Use of Bentley long skirt type pistons on the 20/25 HP chassis.
View original record He c.Rm. BY.15/J.19.11.34. RE; USE OF THE BENTLEY LONG SKIRT TYPE RR.PISTON ON THE 20/25 HP. ------------------------------------------------------- The position in regard to pistons on the 20/25 HP.…

scan0224 The scrapping of 20/25 pistons and a suggestion to await results from a 10,000-mile test run.
View original record x5040 To By. Hs/Rm.4/KW.21.11.34. Referring to By15/J.19.11.34, we do not think it necessary to scrap any of the existing 20/25 pistons, either unmachined castings or in process of manufacture. We…

scan0225 Piston ring fitment issues and proposed clearance adjustments for 25/30 HP & 4 1/4 litre Bentley engines.
View original record To By. c. to E. c. to RHC. x536 Hs/Mths.5/KW.18.2.36. 25/30 HP. & 4 1/4 litre Bentley Pistons E.60632. We now have a set of these pistons in a Bentley unit and have had trouble with the rings being…

scan0226 Proposal to reinstate oil drilling for the gudgeon pin boss on a 25-30 HP Chassis.
View original record GRY x536 c.c. Ev. Hs/Rm. Sft. Da. RR. E.4/HP.11.5.36. 25-30 HP. Chassis. Replying to your memo Mx.11/T.9.5.36, I am fully in agreement with the proposal to reinstate the drilling for collecting oil…

scan0227 Sending of a sample piston for a 25/30HP Chassis to show drilling details.
View original record X536 [redacted text] c.Hs/Rm [redacted text] [redacted text] [redacted text] from Mx. MxR3/T13.5.36 25/30HP Chassis. E4/HP11.5.36 I am sending you herewith a sample piston which will show the drilling…

scan0228 Request for a set of high-pressure scraper rings for a C-16 Unit on a 21-G-IV Chassis.
View original record To RHC. X536 Hs/Mths.4/KW.1.7.36. C-16 Unit (21-G-IV Chassis). We should like a set of high pressure scraper rings fitting to this unit as soon as possible. The rings we are supplying have a cylinder…

scan0229 Issue with Gudgeon Pin Knocks on the 25/30 HP Chassis.
View original record x536 To Mx. from Rm. c. to E. c. to By. c. to Sft. c. to Da. c. to E/JNR. Hs/Rm.5/KW.10.7.36. Gudgeon Pin Knocks - 25/30 HP. Chassis. Whilst we do not object to the oil hole in the connecting rod…

scan0230 Request to modify a set of 25/30 HP pistons to have ring stops.
View original record To RHC. x536 Hs/Mths.27/KW.17.7.36. 25/30 HP. Pistons. Will you please modify a set of 25/30 pistons to E.60632 so that rings have stops as on 20/25. Mx. has had a set modified using the existing…

scan0231 Temporary solution for over-oiling in the 25/30 HP chassis by using 'L' shape piston rings.
View original record Sft. (crossed out) c. Hs. (crossed out) c. Hs/Rm. (crossed out) c. ROY/MS. (crossed out) c. EX/OS. (crossed out) c. Sft/Mr.Goodall. (crossed out) x536 BY.8/G.12.8.36. 25/30 HP, CHASSIS - 'L' SHAPE…

scan0232 Temporary solution for an over-oiling issue by using an 'L' shape piston ring for the 25/30 HP chassis.
View original record SWDL # 536 Sft. (crossed out) c. Hs. (crossed out) c. Hs/Rm. (crossed out) c. ROY/Mss. (crossed out) c. EH/OS. (crossed out) c. Sft/Mr.Goodall (crossed out) BY.8/G.12.8.36. 25/30 HP, CHASSIS - 'L'…

scan0233 Reversing a decision to use 'L' shape rings on the 25/30 HP chassis, with a handwritten note requesting testing.
View original record S.Cl. (crossed out) Mx. (crossed out) Hs/Rm. O.W./CS (crossed out) 536 25/30 HP. CHASSIS - RE: USE OF 'L' SHAPE RING. Further to BY.8/G.12.8.36. instructing that the centre ring on the 25/30 should be…

scan0234 Confirming a request to borrow and produce sets of 25/30 pistons.
View original record 536, To RHC/Mr. Neum. Rm/Swdl.6/JH.7.1.38. 25/30 Pistons. This memo. to confirm our request to borrow a set of 25/30 pistons complete. We are producing 4 sets of pistons and will return a set in view…

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