Rolls-Royce Archives
| Identifier | Entry | ||
| 01-page001 | Archival note referencing the location of previous correspondence. | ||
| View original record | Previous Correspondence in Strong Room Under No. X.5770 | ||
| 01-page002 | Potential engine specification changes for the 25HP model, considering bore, stroke, and overall capacity. | ||
| View original record | E. FROM R. (At Le Canadel.) C. to SC. WOR. RG. C. to HS. BY. re. 25HP. I have never changed my opinion that, on its own merits, the 25HP. is best as we have arranged it, viz: 3.250 x 5", but all… | ||
| 01-page003 | Proposed engine modifications and performance issues with vehicle 18-EX on rough roads. | ||
| View original record | (2) I regret to say that so much of what we are proposing i.e. bigger crankshaft and balance weights, longer con. rods and stronger crankchamber, add to the weight and cost, and we must watch extra… | ||
| 01-page004 | Compromise for a 4.5 litre engine for the 20/25 HP model. | ||
| View original record | To Sg. From Hs/Rn. YS770 Hs/Rn.1/MJ.3.1.31. 20/25 HP. With reference to Sg2/E30.12.30. We think the compromise suggested in E1/MJ.3.1.31 giving us a 4.5 litre engine is very reasonable. We have… | ||
| 01-page005 | Proposing a modification to the 25HP induction stand pipe to improve starting. | ||
| View original record | To By. From Hs/GWH. c. to Hs. We have obtained better results in starting up the 25HP. by a modification to the stand pipe in the induction pipe. We propose to incorporate this modification on all… | ||
| 01-page006 | The standardization of parts following the testing of vehicle 18-G4 in France. | ||
| View original record | To Wor. From Hs. X5770: Hs.2/MJ.6.1.31. Attached herewith is a list of parts we wish to standardise as a result of running 18-G4. in France. Standardisation Sheets are being sent out for most of the… | ||
| 01-page007 | List of modifications to be standardized as a result of a 107,000 mile test on chassis 18-0-IV. | ||
| View original record | X5770- MODIFICATIONS TO BE STANDARDISED AS A RESULT OF 107000 MILES ON 18-0-IV. Torque Reaction Damper fitted with cotton duck washers. TELEGAUGE. N.S.3028. Revised Telegauge Fitting to Arrgt.… | ||
| 01-page008 | List of modifications and updates for various vehicle components. | ||
| View original record | (2) REAR BRAKE EQUALISER (FRONT). Reduced direct braking by 25%, to reduce sponginess of brakes. HEAD LAMPS. Support Tube D.51976. 1.1375" dia. to bring in line with Phantom II practice. DUNLOP RUBBER… | ||
| 01-page009 | List of specifications and modifications for various engine components and assemblies. | ||
| View original record | (3) (3) Damping Friction 8 lbs. 17+" rad. To obtain this, 4 damping springs E.56208 removed. (4) Driving Spring load . 9 1/4 lbs. at 17+" rad: CYLINDERS to LOP E.55334-Scheme 1275 - Lec 2607. E.56057… | ||
| 01-page010 | Performance implications of increasing the 25 HP engine's displacement to 4.7 litres, with weight comparisons to a Chrysler chassis. | ||
| View original record | To Wor. From Hs/Ra. Y 5770 Hs/Rm.4/&J.6.1.31. 25 HP. FUTURE PERFORMANCE. Our present engine and gearbox weigh 678 lbs. for 3.67 litres displacement. Assuming the engine weight increases as the… | ||
| 01-page011 | Preliminary specification of 25HP. chassis. | ||
| View original record | X5990 E1/M8.1.31. PRELIMINARY SPECIFICATION OF 25HP. CHASSIS. Wheelcase and general dimensions of chassis remain as present 25HP. ENGINE. 3.4 x 5" = Capacity 4.46 litres. As per design in hand and… | ||
| 01-page012 | Outlining design suggestions for a new chassis, focusing on cost-saving measures and component interchangeability. | ||
| View original record | (2) and including the new and improved shock dampers now in process of design. WHEELS It is suggested by Works that serious consideration should be given to the use of Rudge-Whitworth wheels on this… | ||
| 01-page013 | 20/25 HP chassis fitted with a Brewster body and dummy shutters, and a wooden subframe for Phantom II cars. | ||
| View original record | To R. From Hs. c.c. to Ag. c.c. to Wor. c.c. to Da/Ev. Y5770 Hs.1/MJ.9.1.31. K.5770. K.7772. 20/25 HP. I am sending you herewith a photograph of the 20/25 HP. chassis which has been fitted with a… | ||
| 01-page014 | Design specifications for the 25HP model, including the back axle, gearbox, and radiator. | ||
| View original record | F. DA. } FROM R. BY. HS. } (At Le Canadel.) Y 5770 R2/Mil.1.31. Copy to SG. WOR. re. 25HP. SPECIFICATION. I agree to all the points E. mentions, but some may lead to delays, it being difficult to… | ||
| 01-page015 | Relaying a telegram regarding a specification agreement with Japan and proposing the design name 'Japan II'. | ||
| View original record | 1/3 (STD) To Sorr. from Cgr. Copy to Hs. H.H. [Text struck through] re 10/25. Sg4/E13.1.31 I have received the following telegram from R: DELIGHTED TO LEARN ENTHUSIASM RE JAPAN AGREES TO SPECIFICATION… | ||
| 01-page016 | Preliminary general arrangement and modifications for a 28HP engine. | ||
| View original record | BY. FROM E. SECRET X8770 E2/M13.1.31. C. to SG. WOR. C. to HS. HY. RIC. 28HP. ENGINE PRELIMINARY GENERAL ARRANGEMENT. We send you herewith a print of LeC. 2833. shewing the above. This drawing gives… | ||
| 01-page017 | Page discussing the production flow and balance of R.H. and L.H. chassis. | ||
| View original record | (3) chassis until the latest possible moment, thereby facilitating the maintenance of the balance of flow of R.H. and L.H. chassis in production. E. and DA. | ||
| 01-page018 | New work programme, project progress, and the assignment of draughtsmen. | ||
| View original record | SECRET X 577° Wor9/T.15.1.31. To [REDACTED] from Wor. C-c. Capt. BY. Mr. DJ. Mr. [REDACTED] I note with considerable pleasure that you have sent to us Print L.C.2853, and I trust that BY will be able… | ||
| 01-page019 | Outlining a proposed development and testing programme for an improved 20/25 HP model. | ||
| View original record | STRICTLY CONFIDENTIAL To Sg. from Wor. Wor4/T5.1.31. Re 20/25 HP. Following on my memo Wor4/T4.1.31. I think it would be helpful if I gave you a programme that I have prepared to work to for the… | ||
| 01-page020 | Production schedules, material ordering, and tooling for various chassis types. | ||
| View original record | Contd:-2- (8) The material for production could possibly be ordered second or third week in July, when we should know how the cars were behaving on the 10,000 miles trial. (9) This material should be… | ||
| 01-page021 | Continued memorandum discussing manufacturing strategies, cost reduction, and production planning for chassis and aero programmes. | ||
| View original record | Contd:-3- We could manufacture at reduced labour costs by making them rapidly and continuously. We could also embody in the last 200 of these chassis many of the new parts that will cheapen costs… | ||
| 01-page022 | The design of a connecting rod for the 26 HP Chassis. | ||
| View original record | Lr. [REDACTED] C. Exp. O. Supp. C. Hs. C. Ry. C. Fwd. 26 HP. CHASSIS. Referring to E2/M13.1.31. we appreciate the advance copy of Lec. 2653. From this we shall be able to gather a general impression… | ||
| 01-page023 | Cover memo for a compiled list of economy suggestions and decisions, with a mention of further suggestions from a meeting. | ||
| View original record | MEMO. FROM E. C. to ED. EHF C. to SY. HEC. C. to RU. HS. X5770. ORIGINAL 25HP. E1/M16.1.31. In connection with WOR4/U/6131, we have collected and arranged in one list the various memos. setting out… | ||
| 01-page024 | List of suggestions to reduce the cost of the 25HP chassis and the decisions made. | ||
| View original record | TO - WDR. EG. H. Ev. RS. BY. RY. SRC. ORIGINAL LIST OF SUGGESTIONS MADE TO REDUCE THE COST OF THE 25HP. CHASSIS, TOGETHER WITH DECISIONS ARRIVED AT DURING A CONFERENCE IN DERBY ON DECEMBER 31. 1930.… | ||
| 01-page025 | Technical document outlining potential design changes and cost savings for various vehicle components. | ||
| View original record | (2) 5. FOOT BRAKE PEDAL PULL OFF SPRING. The 20/25 has a special bracket attached to the frame to carry the rear end of the spring. P. 2. has the spring on the other side of the pedal which enables… | ||
| 01-page026 | Potential cost savings on various vehicle components. | ||
| View original record | (3) 10. GEARBOX. The ball bearings in 20/25 gearbox are housed in steel shells whereas P. 2. has no steel shells. If 20/25 was made like P. 2. a saving could be made: Material 6. 4. Nett labour 2. 7.… | ||
| 01-page027 | Discussion document on potential cost savings and design improvements for the magneto, gearbox selector, and gearbox covers. | ||
| View original record | (2) 15. MAGNETO. As the magneto on the 20/25 is carried as a standby ignition only, and is not in regular use, it might be considered whether it is still desirable to fit it in view of the effort to… | ||
| 01-page028 | Potential cost savings on various gearbox components and the carburetter. | ||
| View original record | (5) 19. GEARBOX OIL THROWER. If the oil thrower on the 3rd. motion shaft could be deleted there would be a saving of: Material . 4. Nett labour 1. 0. Total nett saving 1. 4. Same remarks apply as to… | ||
| 01-page029 | Cost-saving analysis for various engine components. | ||
| View original record | (6) 24. CAMSHAFT. The camshaft gear wheel is mounted on a ball bearing in gunmetal housing. If P. 2. method using plain bearing is adopted there will be reduction in cost: Material 3. 1. E. will make… | ||
| 01-page030 | Potential cost savings on various automotive components through design modifications. | ||
| View original record | (7) 30. WATER PUMP. If the water pump bend was made in one piece with the water pump cover and at the same time was so arranged to allow of a straight pipe being used to connect to the radiator, a… | ||
| 01-page031 | Potential cost-saving measures on various vehicle components. | ||
| View original record | (8) 35. STEERING BOX. On F. 2. the steering box is mounted inside the frame channel. If 29/35 can be re-arranged so as to dispose of the steering box in similar manner the following saving can be… | ||
| 01-page032 | Potential cost savings on frame, steering, and brake components. | ||
| View original record | (9) 40. FRAME. If the frame trusses are retained savings as follows could be made if the pressed steel stiffeners F53239 and F3987 (2 off each) were made in mild steel instead of nickel steel:… | ||
| 01-page033 | Potential cost savings from modifying undershields, brakes, and radiator cross members. | ||
| View original record | (10) ORIGINAL 46. UNDERSHIELDS. By modifying the undershields in the same way as the sample set now fitted to a chassis in Experimental Dept. savings can be made as follows: Material - 10. 5. Nett… | ||
| 01-page034 | Proposed modifications to the rear axle and brake gear for a car with a larger engine. | ||
| View original record | R. FROM DA. C. to SG. WOR. C. to E. BY. C. to HS. X5770 JAPAN 3. DA2/AHS.1.31. X.5770. X.5350. X.5360. With reference to the back axle of this car, the increase in power since it was originally… | ||
| 01-page035 | Supply of information and workflow for the 'JAPAN III' project. | ||
| View original record | H.S. To WOR. from R. copy to PO. " HS. " HY. " BY. " AHC. X5770. M1/18.1.31. JAPAN III. - Re Wor9/T.18.1.31. Now that we have made a start we hope to maintain a continuous supply of information so… | ||
| 01-page036 | Status update on crankcase and cylinder design for the 'JAPAN III' project, referencing various drawings. | ||
| View original record | S1/18.1.31. JAPAN III. Position of Crankcase and Cylinder information. CRANKCASE (Main portion.) Lec.2853 shews main cross section and particulars of crankshaft main bearings. Cylinder centres and… | ||
| 01-page037 | Continued memorandum detailing work on induction pipes, oil supply, and cylinder components. | ||
| View original record | Kl/18.1.31 contd. Work to LeC.2833 for induction pipe jacket connection, and oil supply to rockers. LeC.2864 (will post print to-morrow) shows horizontal section through gas passages replacing… | ||
| 01-page038 | Proposing the name 'JAPAN III' for the 28 HP chassis to prevent confusion. | ||
| View original record | SECRET. Mr. [redacted] Mr. [redacted] Mr. [redacted] Mr. [redacted] Us. 45770 HYC/C.20.1.31. 28 HP. CHASSIS. It is necessary that we should have a distinguishing name for this chassis, so as to… | ||
| 01-page039 | Secret internal memorandum regarding the preliminary specification for the 20/25 Japan III model. | ||
| View original record | SECRET. Y 8779 To Hs. from Sg. re 20/25. Japan III. Sg11/E20.1.31 I think you mentioned the other day that you had not seen the preliminary specification. I, therefore, enclose one herewith. R., as… | ||
| 01-page040 | Preliminary specification for a new car model, codenamed 'Japannth'. | ||
| View original record | COPY B1/W.8.1.31 Japannth PRELIMINARY SPECIFICATION OF [text crossed out] Wheelbase and general dimensions of chassis remain as present 25HP. ENGINE. 3.4 x 5" = Capacity 4.46 litres. As per design in… | ||
| 01-page041 | Series of suggestions for a new chassis design, focusing on cost-saving measures and component interchangeability for a 25HP model. | ||
| View original record | (2) WHEELS. It is suggested by Works that serious consideration should be given to the use of Rudge-Whitworth wheels on this new chassis in view of the considerable saving that might be affected… | ||
| 01-page042 | Typed page discussing the production flow balance of right-hand and left-hand chassis. | ||
| View original record | (3) of the chassis until the latest possible moment, thereby facilitating the maintenance of the balance of flow of R. and L.H. chassis in production. E., and DA. | ||
| 01-page043 | Proposal to use a right-hand engine in a 'Japan 3' left-hand drive chassis. | ||
| View original record | R. FROM S. C. to SG. WOR. C. to HS. BY. X5770 S2/M20.1.31. JAPAN 3. - LEFT HAND CHASSIS. Please find attached prints Lec. 2863. and 2865. dealing with the above. These prints are from rough schemes… | ||
| 01-page044 | The 'Japan III' project, discussing the development and expenditure on left-hand drive chassis. | ||
| View original record | its To Bor. from DEX Copy to R. Hs. HY. re Japan III. Y5770 Sg3/RG1.1.21 Referring to EG/MIO.1.21 sending prints covering certain schemes in connection with left-handing, I think it is excellent that,… | ||
| 01-page045 | Design modifications and simplifications for the 'Japan Engine'. | ||
| View original record | K. HS. BY. FROM R. (At Le Canadel.) R1/M21.1.31. C. to SG. MOR. HY. JAPAN ENGINE. X.5250. C. to RG. RHC. X.634. X.5770. X.5010. If it is necessary for the sake of flywheel vibrations to have double… | ||
| 01-page046 | Design note with a sketch of a starter handle shaft tube, with a related telegram confirmation on design simplicity. | ||
| View original record | (2) RADIATOR. Starter handle shaft passes along this tube. Seems better to have tube below transmission line. starter handle shaft is always in P. 2. because of buffers. I have no dimensions, but… | ||
| 01-page047 | Revisions to the 'Japan 3' engine scheme, including shaft diameters and cylinder skirts. | ||
| View original record | R. FROM E. C. to SG. WOR. C. to HS. BY. X 5770 E3/M22.1.31. JAPAN 3 - GENERAL SCHEME OF ENGINE - Lec. 2853. X.5770 X.5010. We have not hastened to send you a print of the above as we considered that… | ||
| 01-page048 | Modifications to the petrol tank for the 'Japan 3' project, including increased capacity and simplified construction. | ||
| View original record | R. FROM DA. C. to SG. HS. C. to BY. HY. JAPAN 3. - PETROL TANK, ETC. DA7/M23.1.31. X5450 X5770. Derby consider that they can press the bosses in the petrol tank for carrying the various fittings, and… | ||
| 01-page049 | Modifications to the design of torque arms, engine suspension, and gear arrangement for the 'JAPAN 3' project. | ||
| View original record | R. FROM E. C. to SG. MOR. HS. C. to HY. HV. RHC. X 6970 31/M24.1.31. JAPAN 3. We are sorry that the scheme shewing the torque arms was a disappointment, and are modifying it as per your telegram and… | ||
| 01-page050 | Design considerations for the 'Japan 3' engine, focusing on spring drive, bearings, and crankchamber casting. | ||
| View original record | F. HS.) FROM R. BY. ) (Attlee Panader.) C. to - SG. WCR. JAPAN 3. - ENGINE. If we have got to have spring drive I think the aero engine type which we decided for the private venture engine the best.… | ||
| 01-page051 | Review of faults on the 'Japan III' 25 HP car, specifically addressing issues with exhaust pipes and slipper wheels. | ||
| View original record | To R. From Hs. c. to Br. Wor. c. to H. Dd. c. to Ey. He.A/LJ.26.1.31. JAPAN 111 25 HP. We consider that it will be useful to review the troubles we have with the present 25 HP. car so that in 'Japan… | ||
| 01-page052 | Engine vibrations, dynamo output, and ignition complaints for the 25 HP car. | ||
| View original record | -2- Engine Booms and Vibrations. This is a very definite complaint and one which limits us with the 25 HP. car. We are committed to a six cylinder engine and we expect the design to continue for a… | ||
| 01-page053 | The development of carburettors, petrol pumps, shock absorbers and starter motors. | ||
| View original record | -3- No.4/ML.26.1.D.Cont'd. Carburetters. On the question of twin or single carburetters we notice that with the increase in engine speeds, several makers who had been using twin have gone to single.… | ||
| 01-page054 | Blueprint Loc. 2869, illustrating the proposed arrangement of units for both right and left-hand chassis. | ||
| View original record | X5990 HS. FROM E. E2/M27.1.31. Copy to SG. Copy to WOR. Copy to BY. JAPAN 3. Herewith please find blueprint of Loc. 2869.. illustration sent with memo. E1/M24.1.31. to R. of proposed arrangement of… | ||
| 01-page055 | Proposed arrangement of engine accessories for Japan III, with rear timing gears suitable for either right-hand or left-hand steering. | ||
| View original record | PROPOSED ARR'G'T OF ENGINE ACCESSORIES FOR JAPAN III WITH TIMING GEARS AT REAR AND SUITABLE FOR EITHER R.H. OR L.H. STEERING LEC 2869 | ||
| 01-page056 | Design proposals and arrangements for the 'Japan 3' engine. | ||
| View original record | X5770. c. BY. HS. FROM R. HS. RIC. (At Le Canadel.) C. to BG. WOR. DA. JAPAN 3. ENGINE. R/M21.1.31. I am quite satisfied with the arrangement shown on E's sketch comprising 3 gears at rear between the… | ||
| 01-page057 | Sketches and notes on the design of a monocle plate, crossmember, and bearing arrangements. | ||
| View original record | (2) Monocle plate for nose support. Could we provide some lateral stiffness in plan if needed by something of this kind of flat strips of steel. or shall we fit at front and gearbox good tubular… | ||
| 01-page058 | Confidential summary discussing engine vibrations, balancing, design schemes for 'Japan 3', and a proposed new engine configuration. | ||
| View original record | X5770 SG. FROM R. SECRET AND R1/M29.1.31. (At Le Canadel) CONFIDENTIAL. C. to Lord Wargrave. X.7770. C. to Mr. Claremont. X.5770. C. to LHB. WOR. E. P. 2. & JAPAN XTC. X.634. C. to HS. BY. RG. DA. The… | ||
| 01-page059 | Technical discussion on engine vibrations, flywheel instability, and potential design improvements. | ||
| View original record | (2) The Japan3. designs did not seem to be shaping well, and other troubles of P. 2. made me think that the Directors would like me to return, but I am glad they do not because I can still do a little… | ||
| 01-page060 | Engine balancing, crankshaft stresses, steering issues, and the choice of a 12-cylinder engine for high speeds. | ||
| View original record | (3) (i) Less overhanging weight, but this is less important than at first appeared (because not pure whirl.) (ii) Less weight remote from the centre of oscillation more important, but takes away our… | ||
| 01-page061 | 'Japan 3' engine design, comparing 6 and 12-cylinder configurations. | ||
| View original record | X8770 E. Dd. FROM R. HS. BY.) (At Le Canadel.) R3/M29.1.31. c. to - SG. MOR. c. to - HY. RIC. JAPAN 3. Thanks to Mr. Hives for his excellent report and suggestions re. Japan 3. design, we are doing… | ||
| 01-page062 | Engine design choices for the Japan 3 engine, including crank pins, ignition, and connecting rod lengths. | ||
| View original record | E. HS. FROM R. (At Le Canadel.) C. to SG. WOR. BY. C. to HY. RHC. X1770 JAPAN 3. ENGINE Lec. 2853 X.5770. X.5030. X.6105. This seems quite right. The only additional suggestions I can make at the… | ||
| 01-page063 | Breakage of a low inertia slipper wheel, crankshaft vibrations, and engine performance concerns. | ||
| View original record | R. HS. FROM R. BY (At Le Canadel.) X5770 R1/M1.2.31. Copy to SG. WOR. P. 2. LOW INERTIA SLIPPER WHEEL. X.634. X.748C. X.5770 The breakage of the steel disc I think shews that the crankshaft shortens… | ||
| 01-page064 | Flywheel vibration issues and potential solutions for the Japan 3 engine. | ||
| View original record | E. HS. ) FROM R. BY. ) (At Le Canadel.) C. to SC. JCH. RG. C. to HY. RHC. SECRET X5770 R3/M3.2.31. JAPAN 3. ENGINE. X.634. X.5770. E's temporary double rear bearing is good for a trial, but I think… | ||
| 01-page065 | Specification of switches, instruments, and lamps for the 'Japan III' project, with comparisons to a Humber car. | ||
| View original record | SECRET. HS x577° To H. Grylls. Esq. Copy to Lord H. Mr. H. re Japan III. Sg10/M.S.R.31 26.2.31 I am very anxious that, when this comes through, it should be complete and up-to-date so far as concerns… | ||
| 01-page066 | Inclusion of clocks, front aprons, and bonnet ventilators on car chassis. | ||
| View original record | SECRET. To E. from Hg. Sg10/24.2.31 - 2 - to discuss this matter with me as, so far as I can see, it will be necessary to include them all in the chassis price and fit them up in a panel. I doubt if… | ||
| 01-page067 | Modifications to the Japan S. Engine, specifically the connecting rod and cylinder head. | ||
| View original record | JR. FROM E. SECRET X5770 E1/14.2.31. C. to SG. HCR. C. to HB. BY. HY. JAPAN S. ENGINE We send you herewith a further print of Lec. 2853., showing certain modifications suggested by HY. and RASC. to… | ||
| 01-page068 | Design modifications and suggestions for various engine components. | ||
| View original record | (2) (e) To avoid stopping up the waterway above the exhaust bend we have arranged a pocket for the stud holes to break into, and groove to evacuate these pockets which should also help to feed the top… | ||
| 01-page069 | The design modifications for valve gear pedestals and end cylinder studs. | ||
| View original record | (3) VALVE GEAR PEDESTALS. Derby would like the facings for the pedestals flush with the cyl. top to facilitate production. We have however shown them level with the ribs to save weight since the… | ||
| 01-page070 | Confidential memo discussing the competitive threat of the 8-litre Bentley and its performance characteristics compared to the Phantom II. | ||
| View original record | Secret and Confidential. X5770 To R. from Sg. re. P.II & Japan etc. Sg16/ES.2.31. Copy to Directors. E. Hy, BY, Rg, Da. My dear R., Many thanks for your RL/M29.1.31, copies of which you sent to the… | ||
| 01-page071 | Challenges of developing a 12-cylinder car ('double 28HP') in time for the 1931 Show, considering other company commitments and past failures of similar large cars. | ||
| View original record | Secret and Confidential. To R. From Sg. Sg16/RB.2.31 - 2- and high speeds. As regards the low speed torque reaction, which they also suffer from, it is encouraging as the result of the experimental… | ||
| 01-page072 | Confidential memo discussing the purchase of a 12-cylinder Cadillac for competitive analysis and developments in gear ratios and new models. | ||
| View original record | Secret and Confidential To R. From Sg. Sg16/E5.2.31. - 3 - On this question of a 12 cylinder the first important step seems to be to buy one and you will have received memos. recommending the purchase… | ||
| 01-page073 | Confidential letter regarding Bentley's success and the importance of competitive analysis. | ||
| View original record | Secret and Confidential To R. From Sg. Sg16/E5.2.31. - 4 - I hope you will realise that no one regrets more than I do that the Bentley people appear to have been successful in achieving such wonderful… | ||
| 01-page074 | Proposed modifications to the Japan 3 Engine, concerning connecting rod length and flywheel/clutch assembly. | ||
| View original record | R. FROM E. SECRET X577b RZ/MS.2.31. C. to SG. MOR. C. to HS. HY. JAPAN 3. ENGINE Lec. 2853. May we refer again to the above print sent with our memo. of yesterday in connection with the following… | ||
| 01-page075 | Design changes and stress calculations for cylinder studs, a valve cover, and spark plug holes. | ||
| View original record | (2) may not be permissible on the question of cost. (3) CYLINDER END STUDS. The question of whether the end studs A. and B. should run through to the crankchamber was mentioned in our previous memo.… | ||
| 01-page076 | With a sketch discussing the design and manufacturing methods for a cast dashboard for the Japan III model. | ||
| View original record | TO HY. LBS. FROM EV. SECRET COPY TO BY. HS. X5770 EVI/6.2.31. X.5500 X.5770 CAST DASHBOARD. JAPAN III. We are making a design for the cast dashboard for Japn II. and are endeavouring to make it to… | ||
| 01-page077 | Layout and sourcing of controls and instruments for the Japan 3 chassis. | ||
| View original record | SG. FROM DA. SECRET X9770 DAL/M6.2.31. C. to WOR. E. C. to EY. HS. JAPAN 3. - CONTROLS, INSTRUMENT BOARD, ETC. X.5240. X.5530. X.5770. Referring to 3G10/34231., we have looked into the question of the… | ||
| 01-page078 | Secret memorandum calling a conference to discuss progress on the 'JAPAN III' car project, noting delays and reaffirming the goal of selling cars. | ||
| View original record | Mr. Hs. Hives Mr. Robotham SECRET (577) Wor2/T.3.3.31. JAPAN III. If it is convenient to you all, I should like to hold a conference at 3.30 p.m. on Wednesday (4th inst.) on the progress of this job.… | ||
| 01-page079 | Secret memorandum discussing the layout and features of vehicle controls for the 'Japan 3' project. | ||
| View original record | SG. FROM E. SECRET K8770 EL/M6.2.31. C. TO NOR. HS. C. TO BY. DA/EV. JAPAN 3. CONTROLS. A. 5240 X. 5530 X. 5770. Referring to your memo. 9G10/S4231., we examined the equipment of the Humber with… | ||
| 01-page080 | Design considerations and problems for the 'Japan 3' engine, including flywheel fixing, bearings and valve types. | ||
| View original record | E. HS. } FROM R. BY. } (At Le Canadel.) SECRET. X5970 R2/H7.2.31. C. TO SC. WCR. C. TO RG. HY. HIC. JAPAN 3. ENGINE. As regards the double bearing scheme and the difficulty of fixing the flywheel this… | ||
| 01-page081 | Accompanying a revised drawing with modifications, noting it is not to scale but includes necessary dimensions. | ||
| View original record | BY. FROM E. SECRET. X5370 ES/M7.2.31. C. to SG. NOR. HS. JAPAN 3. - Lec. 2653. We send you herewith the original of the above drawing shewing the modifications incorporated that were suggested by HY.… | ||
| 01-page082 | Two proposed modifications to the Japan S. engine concerning the combustion chamber and crankpin diameter. | ||
| View original record | R. FROM E. SECRET X5970 Kl/Mis.2.31. C. to SQ. NOR. C. to HS. BY. HV. JAPAN S. ENGINE Please find herewith print of Lec. 2875. shewing two modifications. The first is in connection with the combustion… | ||
| 01-page083 | Calculations for the cone mounting on the 'JAPAN 3' engine's rear end, referencing print Lec.2877. | ||
| View original record | R. FROM E. SECRET X17770 EL/M28.2.31. C. to SG. WOR. C. to HS. BY. JAPAN 3. - REAR END OF ENGINE. X5330 X7008 Please find herewith a print of Lec.2877., dealing with the above. Our calculations show… | ||
| 01-page084 | Design proposals for the engine's front-end suspension and fan pulley drive. | ||
| View original record | R. FROM E. SECRET X5770 E3/M28.2.31. C. to SG. WOR. C. to HS. BY. JAPAN 3. SUSPENSION OF ENGINE AT FRONT END. X.5005. X.5770. In your memo. referring to the above you proposed that the slipper… | ||
| 01-page085 | Performance improvements for the 25 HP engine, detailing modifications and test results at Brooklands. | ||
| View original record | To Sr. From Hs/Rs. C. to Wor. C. to H. C. to PN. C. to LP. 25 HP. IMPROVED PERFORMANCE. From time to time we have heard criticisms of the maximum speed of the 25 HP. With a view to seeing what could… | ||
| 01-page086 | Comparison table of quarter-mile and lap speeds for various car models and chassis configurations. | ||
| View original record | | | 1/4 Mile. | Lap speed. | |---|---|---| | GLN-66 Saloon o Fitted with 112o Camshaft & 5.75 C.R. (Re/3S.1/SL.28.4.30). | 69.77 | 68.03. | | GXO-13 Open Touring. | 66.18 | 64.26. | | 14-G4 Cabriolet… | ||
| 01-page087 | Progress report on the 'Japan 3' E. & D. Sections project, detailing component status and drawing numbers. | ||
| View original record | WOR: FROM H. C. to SS. HS. C. to HY. HX. X5770 SECRET E1/M14.3.31. Japan 3. - E. & D. Sections. The following report gives the position of Japan 3. at the present moment. It should however be… | ||
| 01-page088 | List of drawing numbers and completion status for various engine component sections. | ||
| View original record | (2) SECTION. DRAWING NOS. REMARKS. CYLINDER. LeC. 2853. " 2864. Cyl. head & block. " 2881. Connection to induction pipe & recess in block. " 2858. Cyl. snouts. " 2885. Connection pump to block. "… | ||
| 01-page089 | Status list of drawing numbers for various engine and chassis components. | ||
| View original record | (3) SECTION. | DRAWING NOS. | REMARKS. WATER CONNECTIONS. | LeC. 2885. | OIL RELIEF VALVE UNIT. | " 2983. | Completed. OIL FITTINGS. | | OIL FILLER. | | OIL STRAINER. | " 2886. | Completed. OIL FILTER… | ||
| 01-page090 | Table outlining drawing numbers and remarks for various vehicle electrical components. | ||
| View original record | (4) SECTION. DRAWING NOS. REMARKS. STARTER MOTOR & DRIVE. MAIN STARTER SWITCH. PUSH BUTTON STARTER SWITCH. SWITCHBOX. COIL MOUNTING. | Lec. 2878. | Preliminary sch. DISTRIBUTION BOARD. It should also… | ||
| 01-page091 | Analysing a chart from Rolls-Royce of America regarding a proposed 25 HP car engine in comparison to American competitors. | ||
| View original record | SECRET To Sg. From Hs/Rm. X5770. Hs/Rm.2/KT.16.3.31. VIEWS OF R.R. OF AMERICA. Returned with Sg's copy We have analysed Btn.l. of Feb.19th 1931. We attach a copy of the chart he sent with the position… | ||
| 01-page092 | Proposing modifications to the 25 HP chassis to make its performance comparable with 1931 American cars. | ||
| View original record | C O P Y ------- Btn-1 February 19, 1931. Mr. Hoss-: Re: 25 HP. Chassis. I have given considerable thought to this proposition and enclose herewith copy of a chart, SK-416, which I have prepared. This… | ||
| 01-page093 | Potential improvements for the 1932 production model, focusing on engine power, weight, and performance. | ||
| View original record | - 2 - 1931 production - I do not know what 1932 has to bring forth but would hazard a guess that it will bring a still further reduction in the weight displacement ratio. It occurs to me that the… | ||
| 01-page094 | Graph plotting piston displacement against finished car weight for various competitor car models. | ||
| View original record | S.K. 416 PISTON DISPLACEMENT FINISHED CAR WEIGHT Line A: 10 LBS/CU IN Line B: 12.5 LBS/CU IN Line C: 15 LBS/CU IN Line D: 20 LBS/CU IN Data Points: 25 EX ROLLS ROYCE R.I. AMERICA CAD-V-16 H.S.P.-W… | ||
| 01-page095 | 20/25 HP car with improved performance, specifically regarding the trial of vehicle GLH-60. | ||
| View original record | K5770 H3 To Hs. from Sg. Copy to Mr. E. R. PH. Ivr. 20/25 HP Improved Performance. RECEIVED SG7/RM7. 15 MAR 31 I am in receipt of Hs/Rm.1/MJ.13.3.31 and note with interest the information you give in… | ||
| 01-page096 | Driving seat and control positions for the 'Japan 3' specification. | ||
| View original record | TO R. FROM DA/EV. DA/EV3/21.3.31. [Handwritten: X5770] COPY TO SG. WOR. Hs. X.5770. BY. HY. DRIVING SEAT X.5430. POSITIONS JAPAN 3. We send herewith a print of N.Sch. 3235. shewing the driving seat… | ||
| 01-page097 | Secret memo discussing the general arrangement of the J.3 engine in the chassis and potential modifications. | ||
| View original record | XM770 R. FROM E. SECRET. E2/M21.3.31. C. to SG. WCR. C. to HS. BY. J. 3. ENGINE - GENERAL ARRANGEMENT We attach herewith a print of Lec. 2891. shewing quarter scale external views of J.3. engine in… | ||
| 01-page098 | Engine selection, chassis stiffness, and frame design for a new car model. | ||
| View original record | E. DA. FROM R. (At Le Canadel.) H.S. Copy to SG. OR. ENGINE WORK - CARS DRIFT WILL NOT DO. R1/49.4.31. K.5770 K.634. We must make J. 3. 6 cyl. because we have the big car 6 cyl. I expect to see Mr.… | ||
| 01-page099 | Meeting notes on revised specifications for the 'Japan S.' engine, focusing on the integral block/crankcase and cylinder head. | ||
| View original record | HY. FROM E. SECRET. XY77 EL/M13.4.31. C. to SG. MOR. HS. C. to BY. RHC. DA. JAPAN S. - REVISED SPECIFICATION. Regarding our meeting on the 9th. and 10th, the following are some notes that I made in… | ||
| 01-page100 | Recommendations for improvements to engine components including water circulation and the crankcase. | ||
| View original record | (2) that all cyl. stud boss faces and rocker bracket faces shall be brought flush with the face for the rocker cover. In addition to saving work this move improves the quality of the production at the… | ||
| 01-page101 | Report page detailing modifications to unit drives, oil fittings, and special ball bearings. | ||
| View original record | (3) device accessible without any other special provision. UNIT DRIVES. It was agreed that the fabric couplings can be driven by simple through bolts from the spiders provided that there is a metal… | ||
| 01-page102 | Engine development priorities, chassis troubles, and competitor comparisons. | ||
| View original record | -2- Really I cannot see that it is worth while to make new tools and patterns for an engine that we cannot expect to be entirely satisfactory, and we ought to spend our whole time pushing on with our… | ||
| 01-page103 | Request to investigate trying a modified cast iron head for the 'JAPAN' engine. | ||
| View original record | To BY. From Hs/Rm. 8577o. Hs/Rm.11/MJ.14.4.31. 'JAPAN' ENGINE. When E. was last here he asked us to try a cast iron head for this engine having the inserts removed so that we get larger valves and… | ||
| 01-page104 | Introduction of new features for the 20/25 chassis model. | ||
| View original record | HS x5770. To Wor. from Sg. Copy to Hs. St. re 20/25's. Sg?/E16.4.31 You will remember that 18-G-4 was given a 10,000 mile test with a good many new features with a view to their introduction on… | ||
| 01-page105 | Design of radiators and arranging a meeting to finalize the matter. | ||
| View original record | To Nor. from Sg. Sg7/E16.4.31 - 2 - would have the radiators with the present high appearance - I refer to their not being dropped through the frame. This point, however, "went west" in view of the… | ||
| 01-page106 | List of new features for the 18-G-4 model. | ||
| View original record | List of New Features on 18-G-4 as at 20.11.30 For and. with Sg7/E16.4.31 1. Radiator 2" lower in frame. 2. Wider Dash. 3. Larger diameter crankshaft. (Only of interest with Balance wts) 4. Low Inertia… | ||
| 01-page107 | Proposals for economy and efficiency in the design of car components for 'Japan III', including wheel carriers, aprons, wings, and lamps. | ||
| View original record | X5970 HY. FROM DA/EV. SECRET. AL/EV2/M17.4.31. C. to WGR. E. C. to RHC. HS. re. JAPAN 111. We would suggest that the following proposals be considered on the grounds of economy and efficiency for 3.… | ||
| 01-page108 | Design change proposals for various vehicle components. | ||
| View original record | (2) FLOORBOARDS. We suggest that we consider whether we should attempt a design to avoid framed wooden chassis boards as these we feel must be costly. For example we might have a metal frame filled in… | ||
| 01-page109 | Future car engine design, focusing on smoothness and comparing 6-cylinder and Vee engine configurations. | ||
| View original record | SECRET. E. HS. ) FROM R. RG. BY. ) (At Le Canadel.) RI/10.4.31. X.5770 X.7770 X.3993 C. to BG. WOR. C. to DA. LHS. C. to MR. CLAREMONT. CAR ENGINES - THE FUTURE INCLUDING J. 3. & P. 3. On our J. 3.… | ||
| 01-page110 | Engine and chassis design considerations, comparing various configurations and competitor models. | ||
| View original record | (2) There is little doubt that the Ricardo engine is the better between 2500 and 4000., but for ordinary town carriage work the power at these speeds is unimportant except to a small percentage of the… | ||
| 01-page111 | Engine vibration, bonnet issues, and damper and flywheel design for 6-cylinder engines. | ||
| View original record | (3) The trouble with bonnets wearing their strips and knocking cannot now be considered passable because we know the reason, and they are curable. 18-EX. is better than any previous type. The damper I… | ||
| 01-page112 | Test report on engine smoothness, noise, and performance at various speeds and with different fittings. | ||
| View original record | FL.23. 85770 20.4.33. 18.G.IV. 1st. Test of the above to get an impression of it I was struck by the smoothness of the engine at high speed. On top gear I noticed some roar at 47 m.p.h. points to… | ||
| 01-page113 | Test report detailing observations on car vibrations, rattles, and performance under various configurations. | ||
| View original record | - 2 - 3rd. Test. Test as above with the steering column insulated with strips of rubber in support clip and bracket on dash removed and gap filled with rubber. We could not appreciate any difference… | ||
| 01-page114 | Test report detailing engine vibration, booming, and performance with and without balance weights. | ||
| View original record | --3-- longer range. The periods on 3rd. gear are at 24 m.p.h. & 34 m.p.h. I could appreciate any improvement on the boom- ing of the car. The overrun vibration at 40 on top remains the same. Engine… | ||
| 01-page115 | Introduction of new features for the 'T' Series and the associated production and supply chain considerations. | ||
| View original record | To Mr. EV. (struck through) From Wor. Copy to Hs. (struck through) X-770 Wor6/T20.4.31. Re 20/25's. Thanks for your Sg7/H16.4.31. Hs., EY., Roy. and myself have had a discussion on your memo, and we… | ||
| 01-page116 | List of new sections required to introduce the 'Japan' engine for the 20/25 HP chassis. | ||
| View original record | 85770 20th. April 1931. 20/25 HP. CHASSIS. ------------------ The following is a list of the new sections which would be required if we introduce Japan engine :- 1/- Induction Pipes. 6 Port. P.2 Type.… | ||
| 01-page117 | Page mentioning an untested exhaust heated induction bend. | ||
| View original record | - 2 - in the previous paragraph, also exhaust heated induction bend which has not yet been tested. | ||
| 01-page118 | Potential improvements to the 20/25' model, including radiator, dashboard, and body modifications. | ||
| View original record | HS X5770 To. Mor. from Sg. Copy to Hs. Mr. HOY. re 20/25' Sg15/S22.4.31 Many thanks for Mor6/T20.4.31. I am glad to note you agree that, in view of the circumstances, we ought to introduce into "E"… | ||
| 01-page119 | Secret memorandum discussing the status of drawings for the 'JAPAN 3' project. | ||
| View original record | X5990 BY. FROM DA. SECRET. DA2/M23.4.31. C. to SG. HS. JAPAN 3. There are a number of drawings which have been sent to R. and not commented upon for some weeks. We take this to mean that they are in… | ||
| 01-page120 | Minutes of a conference at Conduit St. to discuss modifications to the 20/25 HP chassis. | ||
| View original record | To Sg From Ha. c. to WOr. c. to PH. c. to Cx. c. to Ry. CONFERENCE AT CONDUIT ST. TO DISCUSS MODIFICATIONS TO 20/25 HP. CHASSIS. The purpose of the conference was to discuss modifications which should… | ||
| 01-page121 | Meeting notes discussing sales resistance, performance, and design modifications for the 20/25 HP model. | ||
| View original record | -2- (6) Agreed. (7) Agreed. (8) Agreed. (9) Agreed. (10) Cx. pointed out that in his opinion the chief Sales resistance against the 20/25 HP. was (1) Price, (2) Lack of performance. It was therefore… | ||
| 01-page122 | Meeting notes on agreed points and proposed future modifications for the 20/25 HP model. | ||
| View original record | -3- (15) This was agreed to but Sg. would like to know the extra cost this involves. By. promised to supply this information. (16) Agreed. (17) Agreed. (18) It was agreed that the now radiator should… | ||
| 01-page123 | Proposed modifications for the 'Japan 1' type 20/25 HP chassis. | ||
| View original record | JAPAN 1 TYPE MODIFICATIONS TO 20/25 HP. CHASSIS. REAR AXLE. Starting with the rear axle the question arises as to whether it should be 'hypoid' or 'present standard'. By introducing the Hypoid axle we… | ||
| 01-page124 | Specifications and proposals for engine and vehicle components. | ||
| View original record | - 2 - CRANKCASE. The crankcase would be the present standard type, with provision for the idler timing gear being out of line for adjustment purposes, and also include the new dynamo drive where the… | ||
| 01-page125 | Proposed specifications and modifications for various chassis components. | ||
| View original record | - 3 - We propose to use Japan III radiator, bonnet and dash. This means that the bottom of the matrix will be 2.625" below the top of the frame instead of as at present, 1" above. 18-G-4 had the… | ||
| 01-page126 | Letter regarding the despatch of a 20/25 open car model for modification to a 'Japan III' appearance. | ||
| View original record | Hs. at W. [Struck through] Copy to EV. CONFIDENTIAL 85770. HnS/I/29-4-31 At the request of EV. we are to-day despatching to you a small wooden model of a 20/25 open car. We understand EV. will write… | ||
| 01-page127 | List of proposed material changes for the 20/25 HP Chassis, second half of 'T' Series. | ||
| View original record | E. Dept. S.S. Dept. C. Dept. By. Dept. c. Hs. 15770 BYB/G. 30.4.31. A. Dymock RECEIVED 20/25 HP. CHASSIS - 2ND. HALF OF 'T' SERIES. We are seriously considering a material change to the above chassis… | ||
| 01-page128 | Cost-cutting schemes without affecting reliability or quality. | ||
| View original record | - 2 - 11/- All the schemes we can bring in to cut down cost without affecting reliability or quality. BY. | ||
| 01-page129 | Bonnet and side wheel carrier changes for the second half of the 20/25 'T' series. | ||
| View original record | X5770 Hs. from Da/Ev. c. Sg. Wor. c. Ev. Hs. Da/Ev4/MS.5.31. X.5260 X.5600 X.5770 20/25 - SECOND HALF OF 'T' SERIES. BONNET AND SIDE WHEEL CARRIER. Due to coachwork commitments in the form of… | ||
| 01-page130 | List of proposed design modifications for the 20/25 HP Chassis 'T' Series. | ||
| View original record | 8577 O. BY/Cghll/G.7.5.31. [Stamp: RECEIVED 7 MAY 1931] 20/25 HP. CHASSIS - SECOND HALF OF 'T' SERIES. Further to EY3/G.30.4.31. giving particulars of the design modifications, which it is proposed to… | ||
| 01-page131 | Page 2 of a list detailing modifications and specifications for various components. | ||
| View original record | - 2 - 13/- Sheet metal battery box instead of wooden box. 14/- Deletion of steel housings in gear box. 15/- Oil filler on gearbox. 16/- Gearbox covers. 17/- Gearbox oil thrower. 18/- Gearbox oil… | ||
| 01-page132 | Necessary improvements for the second half of the 'T' series, focusing on appearance and performance. | ||
| View original record | SG. MOR. } FROM R. C. to E.B. OA. C. to HS. HY. BIC. X 978 RL/17.6.31. JAPAN 1. SECOND HALF 'T' SERIES. PROBABLY 200 HARD. It is absolutely necessary to wait for this instead of China 4. - i.e. first… | ||
| 01-page133 | Chassis work specifications for 6 cylinder P.2 and J.1 models, detailing present and future plans. | ||
| View original record | X5770 Sg. } FROM R. WOR. } c. Hs. By. c. E. Ds. R1/M8.5.31. CHASSIS WORK PRESENT, AND IMMEDIATE FUTURE. X.7770 X.5770 X.3993 6 CYL. P.2. AND J.1. The above chassis should have :- (1) Diamond mounting… | ||
| 01-page134 | Gearing adjustments and performance comparisons with Bentley vehicles. | ||
| View original record | R1/MS.5.31 contd. -2- This at present only seems possible if the B.A. ratio is increased as suggested. It must be higher than Bentley for this particular job. We have always been too low geared for… | ||
| 01-page135 | Component specifications for the 25 HP, second half 'T' series cars, designated 'Japan'. | ||
| View original record | x5770 To- A. From Hu. C. to Mr. Hives Or. to Mr. .... Hs.S/WJ.8.5.31. JAPAN 1 SECOND HALF 'T' SERIES. x5770 x4456 Replying to Rl/WJ.5.31. It is very important that the specification for the 25 HP.… | ||
| 01-page136 | Technical report discussing component updates and standards, primarily for a 25 HP model. | ||
| View original record | -2- Hs. 5287.B.5.31.Cont'd. ROAD SPRINGS. It is very definite that we make a considerable improvement to the 25 HP. springs by fitting springs of the low rating type. These are fitted to 16-G4 at 1.M.… | ||
| 01-page137 | Recommending the production of new experimental 25 HP 'T' Series cars for testing. | ||
| View original record | To. Sg. From Hs. c. to Wor. 25 HP. SECOND HALF 'T' SERIES. It is now certain that we have got to go on to produce an improved 25 HP. car more or less of the present type with the 'Japan' engine. We… | ||
| 01-page138 | The lengthening of a bonnet, a universal dashboard, and wheel carriers for the 'T' Series. | ||
| View original record | HS. FROM DA. C. to SG. WOR. C. to E. B'. X5770 DA2/DR11.5.31. JAPAN 1. - SECOND HALF OF 'T' SERIES. A. 5770. K.4554. With reference to HS5/AJ8531., we should like to point out that the lengthening of… | ||
| 01-page139 | Component modifications for the 25 HP - JAPAN 1 model. | ||
| View original record | X5770 Ry. Hs. From R. c. Sg. Wor. c. Ry. RHC. R2/M2.5.31. X.5770 X.5010 X.634. 25 HP. - JAPAN 1. Bodies (Bonnet). This has always been for existing stock bodies. The extra length of bonnet is obtained… | ||
| 01-page140 | Technical memorandum discussing issues and proposed changes for the crankchamber, brakes, rear axle, and petrol pump. | ||
| View original record | R2/V12.5.31 contd. -2- Crankchamber. There is no alteration except that lower half has already been scalloped for larger pins - (last 10,000 miles test). Brakes. Will have swivelling tips… | ||
| 01-page141 | Arranging tests in France for a 25 HP car and a Phantom, and the building of new experimental chassis. | ||
| View original record | To Sg. From Hs. c. to Wcr. TESTS IN FRANCE. X.5770. X.7770. Confirming the arrangement made yesterday, we are preparing a 25 HP. car to go to France which will be a model of the second half of 'T'… | ||
| 01-page142 | On the urgent need to finalize specifications for the 'V' Series chassis and conduct testing. | ||
| View original record | Y5770. HS To HV from Sg. To Hs. from Sg. re 25 HP - Japan I. Bg4/E15.5.31 Copy to R. Wor. HV. RMC. Referring to R2/M12.5.31 now that, owing to the importance of the time element, we have had… | ||
| 01-page143 | Specification of alterations for the 25 HP. Series after 'T' car. | ||
| View original record | To Hy. From Hs/Rm. c. to Nor. 25 HP. SERIES AFTER 'T': We understand that we have sixteen weeks in which to produce a car and run it 10,000 miles, in order to standardise any new material for cars… | ||
| 01-page144 | List of special features agreed in a conference for the 20/25 HP chassis, second half of 'T' series. | ||
| View original record | 23770.. BY/Cgh5/G.15.5.31. F. Dept. Fx. Dept. G. Dept. S. Dept. C. Hs. Cr. Sct. C. 1976 RECEIVED 14 MAY 31 19G CLR-81 20/25 HP. CHASSIS - SECOND HALF OF 'T' SERIES.… | ||
| 01-page145 | List of proposed modifications and outstanding decisions for a chassis series, possibly the 20/25 HP. | ||
| View original record | - 2 - BY/Cgh/G.15.5.31. 12/- Dynamo to have half-charge scheme. 13/- Spare wheel carrier to be standard on side, and fitted at the rear when specially ordered. 14/- Luggage grid to be P.ll type No. 4… | ||
| 01-page146 | Arrangement of cars and parts for testing in France, including the 'T' Series and a Phantom. | ||
| View original record | Y 5770 To Hs. from Sg. re Tests in France. Sg8/E18.5.31 Copy to Hcr. I am in receipt of Hs.6/MJ.14.5.31. I note that you have no car which you can use as a model for the second half of "T" Series. I… | ||
| 01-page147 | Specification alterations and a list of desired modifications for a car undergoing tests in France. | ||
| View original record | To Sg. From Hs. c. to Wor. Hs.5/MJ.19.5.31. TESTS IN FRANCE. SgE/x18.5.31. The specification which was agreed to at Derby has now been altered so as to use the W.W. scheme of radiator and front engine… | ||
| 01-page148 | Modifying a wooden model of a 20/25 open car to the 'Japan III' appearance. | ||
| View original record | X.5770. Da/Ev. from Hs. Hs3/AM.9.5.31. We have received from Sales a small wooden model of the 20/25 open car. We understand that you will give us particulars of how it should be modified to give it… | ||
| 01-page149 | Specification for J.1. model covering the engine, flywheel, gearbox, mounting, and camshaft. | ||
| View original record | SG. HS. } FROM R. X8770 R2/M21.5.31. BY. ___________________ C. to NOR. O. J.1. SPECIFICATION. A. 5770. C. to RHC. HY. X. 5090. ENGINE. 3.25" X 4.5" - same as 25HP. - no change to crankshaft… | ||
| 01-page150 | Notes and timing diagrams for a 'No 1' camshaft trial, including performance expectations and component details. | ||
| View original record | TRY No 1 CAMSHAFT (2) Ex. cam to Sch. 1159. In. cam to Sch. 1158. In. cam to Sch. 1158. Ex. cam new curve 85 div. long. No 1 ExCam 61 DIV IN.CAM 57 DIV Angle between cams 114º 11º I.E 56 EX No.2 EXCAM… | ||
| 01-page151 | Design changes to the petrol pump, radiator, and carburettors. | ||
| View original record | (3) We understood however from the recent memos. that you feared interference between some of the exhaust beats affecting volumetric efficiency. We are glad to hear this is not so. PETROL PUMP. There… | ||
| 01-page152 | Improvements and outstanding issues with the 16-G-4, 25HP engine, including flywheel vibration, balance, and exhaust. | ||
| View original record | HS. ) FROM R. BY. ) C. TO ST. WOR. C. TO HY. RHC. X1990 R6/1428.5.31. 25HP. - ORIGINAL JAPAN I. 16-G-4. has greatly improved, for which I give credit as follows: (1) The mounting - softer diabolo… | ||
| 01-page153 | Design considerations for the 25HP 'Future Japan 1s' model, focusing on carburettor types and engine head machining. | ||
| View original record | Hg. } FBCM H. By. } c. Sg. Wor. c. RV. RHC. Y6770 R7/128,5.31. X.5770 X.5680. 25HP. - FUTURE JAPAN 1s. At the moment the head is being drawn. A special feature is the easier machining of the… | ||
| 01-page154 | List of special features to be introduced on the 20/25 HP Chassis for the second half of the 'T' series. | ||
| View original record | E. Dept. P. Dept. C. Dept. B. Dept. C. Ha. Cr. Off. O. ROY. 85220 BY/Cghl/G. 28.5.31. [STAMP: RECEIVED 30 MAY 1931] 20/25 HP. CHASSIS - SECOND HALF OF 'T' SERIES. Further to BY/Cgh5/G. 15.5.31. the… | ||
| 01-page155 | List of vehicle modifications and specifications, including instructions on ordering parts. | ||
| View original record | - 2 - BY/Cgh/G.28.5.31. X 14/- One spare wheel to be carried on the offside instead of at the rear. Spare wheels will only be carried at the rear when specially ordered. If a second spare wheel… | ||
| 01-page156 | Completion and issuance status of standardisation sheets for various items. | ||
| View original record | - 3 - BY/Cgh1/G. 28.5.31. Standardisation Sheets have already been completed for :- Items 1, 3, 4, 8, 12 and 13 and we are expecting Hs. to issue in due course standardisation sheets for :- Items 2,… | ||
| 01-page157 | 'J.1.' specification, production plans and parts for the 'T' series cars. | ||
| View original record | To R. From Us. c. to Sg. Vor. c. to By. RMD. c. to C. Hy. J. 1. SPECIFICATION. Replying to R2/W21.5.31. Re. the second half 'T' Series, which is for 100 cars. The material is now on order and the work… | ||
| 01-page158 | Engine power outputs and the required modifications for P.II, 25 HP, and Phantom engines. | ||
| View original record | 85770 To R. From Hs. c. to S&W Wor. c. to E. Da. c. to By. PN. HS.4/KT.30.5.31. I.5090. X.1090. I.5770. I.7770. ENGINE POWERS. We have been able to obtain a maximum of 180 HP. from a P.II. engine… | ||
| 01-page159 | Results of camshaft testing for the Japan I engine power output. | ||
| View original record | To R. From Ha/Rm. c. to G. Mor. c. to E. H. c. to EY. Ha/Rm.8/KT.29.5.31. JAPAN I. POWER OUTPUT. With reference to R2/M2L.5.31. we have tested three camshafts to the forms you mention, i.e. Lec.1153 &… | ||
| 01-page160 | Engine performance related to camshaft timing, tappet clearances, silencers, and exhaust drumming issues. | ||
| View original record | T.DC. (Left Diagram: Angles 11°, 112°, 49°) (Right Diagram: Angles 7°, 116°, 48°) Inlet duration 250° Exhaust duration 227° Inlet cams to Sch.1153 Exhaust cams to Sch.1158 .013" tappet clearance. On… | ||
| 01-page161 | Timeline and development requirements for the 'Japan 1' specification, a new engine and gearbox. | ||
| View original record | 86770 c. Hs. RE: JAPAN 1. SPECIFICATION. Referring to Sg13/E.2.6/31. I have discussed this memo with Hs., and we think that Sg. has much too early a date in mind, representing the possibility of… | ||
| 01-page162 | The Phantom II Conversion Scheme, discussing car modifications like engine mountings and radiators for testing in France. | ||
| View original record | X54/40. Hs To Hs. from Sg. re P.II Conversion Scheme. Copy to Wor. PH. Sg11/E11.6.31 Referring to Hs.S/MJ.9.6.31 I agree that you should send the car to France with the fittings which have been… | ||
| 01-page163 | Engine design modifications for the Japan Cars, concerning the carburetter, flywheel, and crankchamber. | ||
| View original record | SG. FROM R. X6970 R2/102.3.31. C. to Mr. HS. C. to Mr. BY. THE JAPAN CARS. The work we have been doing at WW. is the head, block, and induction system, and the new model single carburetter to replace… | ||
| 01-page164 | J.3 engine design, engine size, and the balance between performance and comfort. | ||
| View original record | To E. From Hs. *JAPAN 111* Referring to our conversation yesterday on the telephone we quite favour the scheme of going forward with J.3 design of engine instead of producing J.1, because J.1 will… | ||
| 01-page165 | Construction of a single-cylinder unit. | ||
| View original record | -2- Hs.l/WJ.13.6.31.Cont'd. construction we think it would be wiser and more economical to build up a single cylinder unit embodying these features. Hs. | ||
| 01-page166 | Telephone conversation regarding engine design choices, comparing 'Japan 3' and 'Japan 1' models, and considering changes to engine and car sizes. | ||
| View original record | To Sg. From Hs. c. to Wor. 5770 Hs.2/MJ.13.6.31. We had a conversation with E. on the telephone yesterday. The point he raised was that W.E. were considering adopting the 'Japan 3' design of engine,… | ||
| 01-page167 | Engine design specifications for 'JAPAN III' with a 3.4' bore and 5' stroke. | ||
| View original record | 85770 To Sg. From Hs/Rn. Hs/Rn. 6/KT.15.6.31. JAPAN III. The designs which have been received from W.W. for this engine gave it a 3.4" bore and a 5" stroke, this is also the figure agreed by R. Hs/Rn. | ||
| 01-page168 | Engine design proposals for Japan I, II, and III chassis, specifically regarding stroke and bore increases. | ||
| View original record | To Hs. from Sg. 85770. Sg18/E17.6.31 Many thanks for your Hs.2/MJ.13.6.31 and for the information given. R. was here yesterday and I gathered that he was not proposing to adopt Japan III design of… | ||
| 01-page169 | Secret memo discussing modifications to improve the power output of the 'China' engine. | ||
| View original record | SECRET. 85770. To By. From Hs/Rm. Hs/Rm.5/KT.23.6.31. IMPROVED POWER OUTPUT CHINA. K.5770. K.5771. It is now apparent that Japan III is a long way off. When it arrives it is going to want a lot of… | ||
| 01-page170 | Vehicle tests conducted at Brooklands, comparing a Buick with company cars. | ||
| View original record | SG. FROM R. V5780 R2/M24.6.31. C. to MOR. HS. C. to E. DA. re. TESTS AT BROOKLANDS. K.788 C.3317 C.5770 These showed the great importance of weight and windage by the very small difference between the… | ||
| 01-page171 | Objections to building an experimental 20/25 Special Touring Saloon with a dropped radiator. | ||
| View original record | X5770 Hs. from Da/Ev. Da/Ev3/M1.7.31. X.5120 X.5770 X.5250 20/25 - SPECIAL TOURING SALOON. Almost at the same time as you approached Sg. re. the above I did so also, suggesting that we build such a… | ||
| 01-page172 | Design plans for future 6-cylinder engines and synchro mesh transmissions. | ||
| View original record | Sg. from R. c. Wor. Hs. c. E. Hs. X5770 Rl/M6.7.31. X.5770 X.7770 X.3993 THE FUTURE CAR ENGINES It is now agreed and understood that our two smaller models shall have a 6 cyl. engine. I am arranging… | ||
| 01-page173 | Correspondence sending J.3. drawings for alternative dashboard, brake equaliser, and clutch shaft designs. | ||
| View original record | X5770 By. from Da. C. Hs. Dal/M6.7.31. JAPAN 3. X.5770 We have had several J.3. drawings standing by since the design was stopped and think it would be well if you had the custody of them, and would… | ||
| 01-page174 | List of instructed parts for the 25 HP programme, categorized for China and Japan. | ||
| View original record | To RHC. From Hs/Rm. Hs/Rm.5/MJ.6.7.31. Y 5730 25 HP. PROGRAMME. We now have the following parts instructed.- CHINA: (1) High lift rocker valves and pedestals. By/CS/EH1.7.31. (2) Adaptor for S.U.… | ||
| 01-page175 | Accompanying blueprint Lec.2926 for the revised J.3 engine, detailing its general scheme and construction materials. | ||
| View original record | Ry. from E. c. Sg. Wor. Hs. X5770 El/M7.7.31. JAPAN 3. X.5770 We send herewith a blueprint of Lec.2926 showing the first drawing completed in connection with the revised J.3. This drawing shows the… | ||
| 01-page176 | Confidential memorandum detailing design proposals for the J.2 25 HP car and Private Venture aero engine. | ||
| View original record | CONFIDENTIAL. X5770 Sg. from R. R2/MB.7.31. c. Wor. Hs. X.5770 c. Ev. E. Da. X.1906 J.2 - 25 HP., AND PRIVATE VENTURE AERO, ETC. Regarding the suggestion of a conference on the car programme the… | ||
| 01-page177 | Specification changes for front springs, carburettors, ignition, petrol supply, and gearing. | ||
| View original record | -2- R2/MB.7.31. contd. FRONT SPRINGS. We have decided to lengthen the front springs by 2" although they are already longer than on other chassis of similar size. CARBURETTERS. In the specification of… | ||
| 01-page178 | Expressing concerns about the design direction and performance of a new 25 HP car. | ||
| View original record | To R. from HS. c. SG. ROY. c. H. Ea. c. Hy. Y5770 HS3/ADR1.7.31. Y3998 JAPAN 3. - 25 HP. Personally, I feel it is a mistake to reduce the cylinder size of the new 25 HP. car. With an improved… | ||
| 01-page179 | Engine bore and stroke for the 20/25 model, advocating for a larger bore to increase performance. | ||
| View original record | To E. from HY. re Japan III. Sg11/M14.7.31 Copy to Hs. Lr. 20/25. E. De. Sy. HS 85770 Referring to your recent memo. wherein you again refer to the question of retaining the 3.25 bore for the 20/25… | ||
| 01-page180 | List of parts to be fitted to vehicle 19-G4 for testing in France. | ||
| View original record | 85770 PARTS TO BE FITTED TO 19-G4. FOR TESTS IN FRANCE. X5840 ENGINE. - Diamond mounting 'W.W.Scheme. Stiffer flange for holding flywheel to reduce flywheel vibrations. Standard slipper wheel. Magneto… | ||
| 01-page181 | Modifications to the radiator and the engine horsepower rating for the 20/50 'T' series. | ||
| View original record | To R. from Sg. c. Wor, He, Hs. X5770 Sg22/17.7.31. X.5770 X.4531. Re : 20/50 SECOND HALF OF "T" SERIES. Thanks for your telephone message of yesterday regarding the radiator. PN., CX. and I saw this… | ||
| 01-page182 | Radiator alterations and bonnet shutters for the 25 HP car ahead of testing in France. | ||
| View original record | To Sg. From Hs. c. to Wor. 85770. Hs.4/MJ.18.7.31. X5770. X.5250. 25 HP. TESTS IN FRANCE ON 19-G4. It is intended to send this car to France in order to test out the parts which will be fitted to the… | ||
| 01-page183 | Preliminary specification document for an 18 HP model. | ||
| View original record | X5770 SG. FROM R. R1/1420.7.31. C. to WDR. HS. HY. PRELIMINARY SPECIFICATION C. to E. DA. FOR 18 HP. This is to follow almost exactly J.3, the engine being the same at a scale of .31 = 2.75 (70.mm.)… | ||
| 01-page184 | The trade-offs between using use-less bushes for springs versus retaining the central oiling system. | ||
| View original record | -2- weight of the engine to fit frame dampers in addition to the ordinary hydraulic axle dampers. For the low cost we ought to use-less bushes for the springs, but then we should be cutting out our… | ||
| 01-page185 | Specifications for an 18HP model, including track width and gear change position. | ||
| View original record | X5770 SG. FROM R. RL/123.7.31. C. to W.R. BY. HS. C. to E. OA. 18HP. SPECIFICATION. I think the suggested track is too wide, and it should be 54" front, 56" rear - i.e. 2" less than 25HP. which is 2"… | ||
| 01-page186 | Private letter from Sg. to Hives regarding the building of a J.3 experimental car. | ||
| View original record | S/W. PRIVATE. To Hs. from Sg. To await return. Sg13/D29.7.31. Dear Hives, Referring to the enclosed, when I discussed this matter with Ev. we both came to the conclusion that if the matter of building… | ||
| 01-page187 | Secret memo discussing the construction of a new 20/25 car with a saloon body for testing and as a sample for the 'U' Series. | ||
| View original record | SECRET. Hs. Vonn S/W. To Hs. from Sg. c. to Wor. c. to BY. c. to Da/Er. re 20/25. Sg12/D29.7.31. You will remember that when you were in London with 19-G-4 (the car for 10,000 mile test with drop… | ||
| 01-page188 | Component specifications for various vehicle series including gearboxes, axles, and batteries. | ||
| View original record | -2- Sg12/D29.7.31. bearing in mind in regard to 'U' Series that as possibly only 50 or 100 may ever be made, it would not be worth while introducing anything that would mean expensive additions to the… | ||
| 01-page189 | Clarifying car specifications for the bonnet, steering column, and springs. | ||
| View original record | -3- Sg12/DS9.7.31. BONNET (Cont'd) amount of overlap as for 'T' Series. The Steering Column will be "F" type, which I understand has previously been done for a customer. The Springs presumably will be… | ||
| 01-page190 | List of engine components, service items, and other parts. | ||
| View original record | Parts in 25HP to show on chassis Valve springs Crankshafts Con rods Rockers Camshafts Exhaust boxes Pistons Propeller shafts | rear cross member Present Material U S Service Synchro mesh gear box New… | ||
| 01-page191 | Project status of a new 20/25 design, codenamed 'Japan 3', and the plan to build an experimental chassis. | ||
| View original record | SECRET. PRIVATE. X5770 S/W. To Hs. from Sg. c. to R. c. to Wor. c. to E. c. to BY. c. to Da. Re: Japan 3. Sg10/DEL.7.31. I am not sure yet whether the correct description of the above is Japan 1, 2, 3… | ||
| 01-page192 | Potential names for a new car model ('No.3') and proposed technical changes to the 15HP chassis ('J.3'). | ||
| View original record | SG. FROM R. C. to DR. HS. BY. C. to R. DA. re. J. 3. RT/14.o.31. X.5770. X.5380. The full and latest size Japan has been called No.3 all along but we need some better name before we produce. I suggest… | ||
| 01-page193 | Internal codename 'Japan 5' for a new model, and the timing for creating a prototype. | ||
| View original record | S/W. SECRET. Y 5970 To H. from Eg. c. to Ser. Hr., Mr., [illegible crossed out text] SgS/DS.8.21. re J.3. Many thanks for R7/M4.8.21 and I note that the full and latest size Japan has been called No.… | ||
| 01-page194 | The new front engine and radiator support, with the design changed due to a deeper radiator. | ||
| View original record | MS. ) FROM R. RY. ) X5970 RH/MS.8.31. c. to SR. MOR. 25 HP. X.5770 X.5280 X.5260 NEW FRONT ENGINE AND RADIATOR SUPPORT - CHANGED DESIGN BECAUSE OF DEEPER RADIATOR. This seems very simple, (considering… | ||
| 01-page195 | Potential performance improvements for the 25 HP model to increase sales. | ||
| View original record | XS77D To R. From HS. c. Sg. c. Wor. E. c. Da. RV. HEL/AMS.8.31. X.5770. X.5010. INCREASED PERFORMANCE OF 25 H.P. If we can offer a 25 HP. car which has a maximum top speed of 75 M.P.H. it should help… | ||
| 01-page196 | Bench tests and modifications to improve the performance of a 25 HP power unit. | ||
| View original record | y5770 To R. from Hs/Bm. c. Sg. c. Mor. E. c. Da. Ev. Hs/RMS/AHS.8.31. IMPROVED PERFORMANCE 25 H.P. y5771 We carried out some bench tests to see how much we could increase the power output of "China"… | ||
| 01-page197 | Performance and handling of a car during high-speed tests, noting lap times, engine roughness, and component effectiveness. | ||
| View original record | Hg/Tms/AM.5.8.31. contd. -2- A 3" dia. propeller shaft was fitted to prevent whirling - we already have a design of cross member which enables us to utilise this. The P.II. exhaust system was fitted… | ||
| 01-page198 | Blueprint graph of engine performance test results from Brooklands. | ||
| View original record | 12 GTV BROOKLANDS TESTS AUG 1931 R.M. 27 CHINA UNIT 112 SHAFT CO. OPEN HIGH LIFT ROCKERS 3.65 C/R IV-50 AXLE RATIO S.U. H.V. 5. CARB STD & 5% LARGER B.H.P. M.E.P. INDUCTION DEPN INS HG RPM M.P.H.… | ||
| 01-page199 | Graph comparing the performance and back pressure of five different exhaust systems against engine RPM. | ||
| View original record | RM 26 COMPARISON OF EXHAUST SYSTEMS. CHINA 1/2 SHAFT HIGH LIFT ROCKERS 5.65 C/R STD. 15% LARGER CARB. ① OPEN EX. ② P.II EX. SYSTEM ③ W.W. No. 603256 P.II FISHTAIL ④ W.W. No. H. 3256 COMP. FISHTAIL ⑤… | ||
| 01-page200 | Brooklands performance test data for a 12 G IV Close Coupled Four Seater, comparing various car and engine configurations. | ||
| View original record | RM. 28. 12 G IV BROOKLANDS TEST 14/8/31 CLOSE COUPLED FOUR SEATER WT. 32.25 CWT AXLE RATIO 11x50 TYRES 6" FORT DUNLOPS 19" RIMS. 60 MPH = 3000 RPM. CONDITION OF CAR AND UNIT | LAP TIME | LAP SPEED ---… | ||
| 01-page201 | Assessment of the appearance and production suitability of a 25HP car on its way to France. | ||
| View original record | HS. ) FROM R. SC. ) C. ) 1599 35/105.S.31. X.5770 X.4531. C. to WDR. BY. 19-G-4. - 25HP. ON ITS WAY TO FRANCE. The appearance of this car seemed as good as we know how to make it. The radiator depth… | ||
| 01-page202 | Acceleration and hill climbing tests to confirm the improved performance of a 25 HP car. | ||
| View original record | 85779. To H. From Hs/Rm. c. to Sg. Vor. c. to Ds. R. c. to By. Hs/Rm.9/MJ.19.8.31. IMPROVED PERFORMANCE 25 HP. With a view to confirming the low speed performance of the car on which the recent higher… | ||
| 01-page203 | Low speed performance tests for hill climbs and acceleration comparing different carburettor and silencer setups. | ||
| View original record | LOW SPEED PERFORMANCE TESTS SUBSEQUENT TO BROOKLANDS TESTS H3/RM.3/AD15.8.31. 12-04 CLOSE COUPLED FOUR SEATER 11 X 50 AXLE. CAR WEIGHT TWO PASS. 10 GALLS PETROL 34.75 CWT. UNIT POWER AS IN CURVE… | ||
| 01-page204 | Proposing tests on a 25 HP high performance car at Brooklands. | ||
| View original record | PN. From Hs. 8770 Hs.13/MJ.24.8.31. TESTS 25 BROOKLANDS. We propose taking the high performance 25 HP. car to Brooklands on Wednesday, and will arrive there about 11 a.m. I shall try and get you on… | ||
| 01-page205 | Dispatch of drawing LeC. 2938 for the J.3. crankcase, cylinder block, and crankshaft. | ||
| View original record | BY. FROM E. X5770 E1/1429. 8. 31. C. to SG. WOR. HS. J. 3. CRANKCASE, CYLINDER BLOCK, CRANKSHAFT, ETC. X.5770 X.5000 X.5050 X.5010 We send you herewith a print of LeC. 2938., dealing with the above.… | ||
| 01-page206 | Test report on a modified 25 HP car at Brooklands race track. | ||
| View original record | 85770 MJ88 85770 To R. From Hs. c. to Sg. Wor. c. to S. Du. c. to Hy. TESTS ON BROOKLANDS. IMPROVED 25 HP. CAR. Tests were carried out on Brooklands on Wednesday the 26th.Inst. with 12-G4. car. This… | ||
| 01-page207 | Performance comparison chart of a 25 HP car's lap speeds at Brooklands Track with various engine and axle configurations. | ||
| View original record | 25 HP CAR. IMPROVED HIGH SPEED PERFORMANCE. BROOKLANDS TRACK. LAP SPEED 65.87 MPH STANDARD ENGINE AND CAR. 11/50 AXLE 67.87 MPH STANDARD ENGINE S.U. CARBURETTER. 11/50 AXLE 72.48 MPH (73.45) SPECIAL… | ||
| 01-page208 | Bar chart comparing the high-speed performance of a 25 HP car with different engine, carburetter, and axle configurations at Brooklands track. | ||
| View original record | 25 HP CAR. IMPROVED HIGH SPEED PERFORMANCE. 2. BROOKLANDS TRACK. SPEED OVER HALF MILE. 65.69 STANDARD ENGINE AND CAR 11/50 AXLE 68.18 MPH ST'D ENGINE S.U. CARBURETTER 11/50 AXLE 75 MPH (77.25) SPECIAL… | ||
| 01-page209 | Results of experiments on the 25 HP car and plans for incorporating new features. | ||
| View original record | To R. From Hs. c. to Sg. Wor. c. to E. Da. c. to Ry. Y5770. Hs./W.29.8.31. X.5770. 25 HP. CAR. Our experiments on the 25 HP. car have been carried out on two cars. On 12-G4, which we have had at… | ||
| 01-page210 | Results of experimental work to improve the performance and smoothness of the 20/25 HP car. | ||
| View original record | 85770. To Hs. from Sg. re 20/25 HP Car. Sg15/B1.9.31 Copy to R. W.R. E. D.W. DY. PS. Since my return I have read with very considerable interest the results of experimental work which you have been… | ||
| 01-page211 | Delay to the 25 HP experimental car 18-S4 due to fitting an improved synchro-mesh gearbox. | ||
| View original record | To Sg. From Hs. c. to R. Nor. c. to E. Dc. c. to By. FW. 85770 Hs.2/WJ.2.9.31. 25 HP. CAR. Replying to Sg.15/K.1.9.31. The Expl. car 18-S4 which is being prepared with the improved performance and… | ||
| 01-page212 | Progress report on the J.3. project, detailing cost-saving design improvements and steering adjustments. | ||
| View original record | HS. BY. } FROM R. RB. } C. to SG. WOR. C. to E. DA. X/SERD R2/M3.9.31. Sent off 7.9.31. X.3993 X.5770 DESIGN WORK IN PROGRESS AT WW. ALMOST ENTIRELY J. 3. Some considerable progress has been made and… | ||
| 01-page213 | Technical memo outlining required improvements for 25HP and 45HP car models. | ||
| View original record | HS. FROM E. C. to SG. WDR. BY. X 5870 R3/MS.9.31. Sent off 7.9.31. CAR WORK. X.3993. X.5770. X.7770. A few things we must have quickly: (1) 25HP. & 45HP. BALANCE WEIGHTS. Balanced crankshafts partly… | ||
| 01-page214 | Engine performance trade-offs, prioritizing reliability over maximum speed and horsepower. | ||
| View original record | -2- realised that the last MPH. is less important than many of the other features, especially missing fire with very light charges. We are hoping to get good results from fixed throats but it seems… | ||
| 01-page215 | Technical memo discussing engine performance specifications and modifications for the Phantom II. | ||
| View original record | HS. ) FROM R. BY. ) C. to SG. C. to WOR. C. to RG. RL/MS.9.31. Sent off 7.9.31. PHANTOM 2. To get power equal to the 25HP. we should get about 180 HP. with one carburetter, and depression at 4" Hg.… | ||
| 01-page216 | Material change from aluminium to cast iron for the Peregrine J.111 crankcase and cylinder block. | ||
| View original record | V5770. BY.3/G.15.9.31. PEREGRINE - J.111. Referring to E.1/M.14.9.31. I note that we are to produce the top half crankcase and the cylinder as a unit, and that the material is to be Cast Iron, and… | ||
| 01-page217 | Design policy for the 'Peregrine' project, comparing scaled-down vs. shared components from the J.3 model. | ||
| View original record | 85770 To Wor. From Hs. Hs.9/WJ.15.9.31. PEREGRINE. We consider that it would be a mistake to make an exact copy of J.3 scaled down .8 dimensions. If we do this we shall be producing a large number of… | ||
| 01-page218 | The standardization of parts for the 20 HP Chassis 'T' Series. | ||
| View original record | Sft. Hs. C. Wor. Cr. Wox. (S -) BY.7/G.25.9.31. 20 HP. CHASSIS - 'T' SERIES. -------------------------- We fully appreciate the fact that a large number of parts are held up on the second half of 'T'… | ||
| 01-page219 | Proposed improvements and new parts for the 25 HP car model. | ||
| View original record | 85770 To H. From Hs. c. to Sg. Tor. c. to E. Da. c. to By. 25 HP. When Sg. was at Derby yesterday it was agreed that we should proceed preparing 16-G4 with the new parts which it is hoped to… | ||
| 01-page220 | Concluding remarks about implementing improvements on a 25 HP car following satisfactory tests. | ||
| View original record | -2- present 25 HP. are very low, and therefore as soon as we have completed satisfactory tests there should be no delay in getting these improvements on a car. Hs. | ||
| 01-page221 | Design options and cost for a front apron on a 'Y' Series chassis. | ||
| View original record | X5770. Hs To HY from Sec. Copy to Secy. E. Hs. re Second Half of "Y" Series. Ref: I/H14.10.31 Replying to HY.18/G.Y.10. I note that you are assuming that a front apron will be fitted to the above… | ||
| 01-page222 | Inquiry about the readiness of a component for a 10,000-mile test. | ||
| View original record | COPY. Y5770. To Hs. From Sg. c. to WGR. Re. 18-G4. Sg/E14.10.31. Y5770. XS140. Would you please let me know how this stands from the point of view of our seeing and trying it and its starting off on a… | ||
| 01-page223 | Road tests for a car with new features, including a modified crankshaft, flywheel, and exhaust valves. | ||
| View original record | γ5770 To Sg. From Hs. C. TO WOR. Hs.9/WJ.14.10.31. Y8840 18-04. Replying to Sg3/E14.10.31. This car is running on the road with all the new features fitted to it except the crankshaft balance weights… | ||
| 01-page224 | Confirmation of a telephone conversation regarding modifications to frame width for Phantom II and Peregrine, and a discussion on wheel and tyre specifications. | ||
| View original record | DA/WW. c. Hs. c. BY/Cph. c. BY/ChS c. BY/A?? c. BY/??? TELEPHONE CONVERSATION WITH WW. 19.10.31 JAPAN 111. We wish to confirm our telephone conversation in which you informed us that in order to keep… | ||
| 01-page225 | Tyre dimensions, their impact on chassis height and steering, and the provision of blueprints. | ||
| View original record | - 2 - BY.4/G.19.10.31. some time ago and obtained from them dimensioned drawings of the section of the tyre. We attach hereto blueprints for your guidance. We notice the difference in tyres you show,… | ||
| 01-page226 | Approval process for new part drawings for the Japan 3 and Peregrine I projects. | ||
| View original record | COPY. BY. FROM R. C. to SG. WCR. C. to HS. DA. CAR WORK - NEW DESIGNS. JAPAN 3. & PEREGRINE 1. PEREGRINE. To avoid waste and delay it was understood that a copy of any drawing of new parts that was in… | ||
| 01-page227 | Requesting an update on the completion timeline for the Japan 3 Engine Section design work. | ||
| View original record | HS X5770- To S. from Sg. Copy to Mr. Hs. Mr. re Position of Japan 3. Engine Section. Sg4/HET.10.41 Thanks for H1/Man.10.'X enclosing tabulated report giving the position of design work. What I should… | ||
| 01-page228 | Delays on the 'Japan 3' engine project and a revised completion target of Christmas. | ||
| View original record | COPY. X5770 SG. FROM E. EL/M26.10.31. X5770 C. to WOR. HS. BY. JAPAN 3. In reply to your memo. SG4/E231031., the remarks made during your visit of September to VV. with regard to Japan 3, referred to… | ||
| 01-page229 | Holding production on a list of experimental parts for the 'T' series. | ||
| View original record | X5770 Hy. from Ha/Rm. Ha/Rm.2/AD29.10.31. SECOND HALF OF "T" SERIES. The following parts are still in the state of being experimented with and should therefore be held up on production for a little… | ||
| 01-page230 | Alterations for the second half of the 25 HP 'T' series and suggesting a conference to review the changes. | ||
| View original record | Y 5770 To Wor. From Hs. c. to Ey. Hs.4/WJ.29.10.31. 25 HP. SECOND HALF OF 'T' SERIES. We suggest that it would be very useful if we had a talk on this job to review the position. Since the original… | ||
| 01-page231 | From 'R' discussing design improvements and considerations for the 'Japan 1 Unit' engine. | ||
| View original record | COPY. HS/RM. } FROM R. BY. } X5770 R2/1530.10.31. X5770 C. to SG. WDR. RG. C. to E. DA. re. JAPAN 1. UNIT. We are very pleased to see that this can give 94HP. You will remember that for many reasons I… | ||
| 01-page232 | Confirming the production of an additional 25 chassis for the 25 HP 'T' series. | ||
| View original record | WOR. c. Hs. Y8770 BY/Cgh.18/G.2.11.31. 25 HP. SECOND HALF OF 'T' SERIES. With reference to Hs.4/WJ.29.10.31. Hs. and By. have discussed this matter and consider that we should make another 25 chassis… | ||
| 01-page233 | Modifications and proposed standard items for the 20/25 HP Chassis T-Series. | ||
| View original record | X5770. S/W. Hs. re- 20/25 h.p.Chassis - Second Half of T.Series. I have already received various notifications from time to time of modifications that will be introduced in the above Series. A lot of… | ||
| 01-page234 | Listing six new parts or alterations for the second half of the 20/25 Chassis 'T' Series. | ||
| View original record | Y5770. Cx. from Hs/Rm. Hs/Rm.4/AD4.11.31. 20/25 CHASSIS - SECOND HALF OF 'T' SERIES. With reference to CX3/KW3.11.31. the following parts that you mention will be on the second half of 'T' series (1)… | ||
| 01-page235 | Various component failures in a 19-G4 model car at 15,000 miles. | ||
| View original record | Copy. X5770. X5840 X5770. S/W He...from Sg. Copy to Wor. Rg. E. Da. By. ED. Mx Sg.1/WT5.11.31. Report on 19-G4 at 15,000 miles. I hope sufficient time has now elapsed since this report was made to… | ||
| 01-page236 | Blueprint Lec.2969 for fan drive, exhaust, and water connections, noting uncertainty about front axle and steering tube positions. | ||
| View original record | BY. FROM E. X5770. E2/AH.17.11.31. C. to SG. WB. HS. J. S. FAN DRIVE, EXHAUST K.5770 PIPE, WATER CONNECTIONS, & DRAIN TAP. We send you herewith blue print Lec.2969 dealing with the above. We are not… | ||
| 01-page237 | Cover memo for a Fitting Department report on the first 'T' series 20/25 HP chassis. | ||
| View original record | Ry - from Sft. c. Hs. 85770 Sft.5/B.9.11.31. 20/25 HP Chassis. 1st Car in 'T' Series. 2nd 100. ---------------- I attach hereto copy of the Fitting Dept's report showing points which need attention… | ||
| 01-page238 | List of ten issues and required modifications for the 20/25 HP 'T' Series, 2nd 100 vehicle. | ||
| View original record | (COPY) 20/25 HP. 'T' Series. 2nd 100. 1. Ball End Pins for supporting radiator were found to be short when passed through crossmember and would not admit of full nut. Parts found to be correct to… | ||
| 01-page239 | Issues with the radiator suspension on ball pins, specifically the length of the centre distance piece. | ||
| View original record | -2- 11. Radiator suspension on ball pins - we found that the centre distance piece provided was not long enough to meet the thickness of packing washer we were compelled to use in this instance. Had… | ||
| 01-page240 | Progress report on the design and development of the J.S. engine. | ||
| View original record | SG. ) SDE E. MOR. ) R5770. 21/N.11.31. (57B) C. to HS. BY. JAPAN 3 We are concentrating on that part of the design work required for getting a J.S. engine running on the bench, as there is much useful… | ||
| 01-page241 | Car 19-G4 after 15,000 miles, detailing component issues and modifications. | ||
| View original record | To Hs. From Hs. c. to Nor. c. to R. Da. c. to By. EP. c. to Mi. Y5770 Hs.3/WJ.10.11.31. REPORT ON 19-G4 15,000 MILES. 15840 Replying to Sg.1/FTS.11.11.31. FRONT WHEEL WOBBLING. - We have not found a… | ||
| 01-page242 | Extract from a memo on car design work, specifically concerning a new rubber support for the radiator and engine front end. | ||
| View original record | EXTRACT FROM: X5770 Hs. } FROM R. By. } R.2/M.10.11.31. X5250 X5770 X4827 C. to SG. WOR. CAR DESIGN WORK RADIATOR & ENGINE FRONT END SUPPORT - J. 3. A PEREGRINE. We have had this with many… | ||
| 01-page243 | On car design work, discussing issues with petrol gauges, ignition coils, and exhaust pipes. | ||
| View original record | RS. FROM R. BY. } C. to SG. WDR. X5770 R4/M.10.11.31. X5770. XM.27. CAR DESIGN WORK. We are working on many problems as well as finishing some urgently wanted designs which you also require for… | ||
| 01-page244 | Pump connections, engine mounting, and carburetter design for the L.S. & Peregrine. | ||
| View original record | -2- PUMP CONNECTIONS & ARRANGEMENT - L.S. & PEREGRINE. We have been struggling with this for some time and are pleased to say that it now seems simple and satisfactory, including the convenience of… | ||
| 01-page245 | Modifications to a 25 HP car for Lord Cholmondeley and its performance trial results. | ||
| View original record | 85770 To B. From Hs. c. to Sg. Wor. c. to R. Da. c. to Dy. Hs./WJ.14.11.31. X.5770. X.4117. 25 HP. CARS. You will remember that some time ago Lord Cholmondeley ordered a 25 HP. car and asked expressly… | ||
| 01-page246 | List of modifications and improvements for the 20/25 chassis. | ||
| View original record | Sft. from Hs. c. By. c. Mor. He.1/AHR 7.11.31. 20/25 CHASSIS IMPROVEMENTS. Below is a list of modifications we expect to be fitted at the 175 chassis in T. series. We expect to be able to release all… | ||
| 01-page247 | Status update memo on various automotive components and planned standardizations. | ||
| View original record | Hs.1/AM/7.11.31 contd. -2- Easy change gear box. N.sch.3359 Reverse shaft lubrication. experimental and permanent schemes. Hs.450 and memo Hs/Cry/7/MJ11.11.31 stiffer shaft. This is waiting for final… | ||
| 01-page248 | Unsuitability of the 20HP and J.1 engines for speed and supercharging programmes. | ||
| View original record | HS. FROM R. C. to SG. WOR. BY. GOSHAWK 1. ENGINE. X5770 Ra/W26.11.31. Sent off 30.11.31. X5770 With reference to the above - i.e. the earliest 20HP., which was never adopted - we found there would be… | ||
| 01-page249 | Design and layout for the rear end of car J.3. | ||
| View original record | TO. FROM DA/EV. X5770 SECRET. DA/EV.1/30.11.31. COPY TO SG. HS. THE REAR END OF CAR J.3. A.5770 A.5780 You will have already received from us the full-sized schemes of the petrol tank, rear apron and… | ||
| 01-page250 | The production of 100 20/25 HP 'U' Series chassis, numbers 3801-3900. | ||
| View original record | x5770. To: HY [Struck through] EFF [Struck through] SS [Struck through] Hoy [Struck through] Jls [Struck through] HW [Struck through] from ROY 20/25 HP. CHASSIS - "U" SERIES Nos. 3801 - 3900.… | ||
| 01-page251 | Production schedule for the 20/25 HP Chassis 'U' Series (3801 - 3900). | ||
| View original record | Ref: ROY2/MG2.12.31 20/25 HP. CHASSIS - "U" SERIES 3801 - 3900 Number of Chassis in Series ................... 100 Proposed Output ............................... 4 per week (including holidays)… | ||
| 01-page252 | Calculations and diagrams for an improved camshaft for China. | ||
| View original record | XS 770 IMPROVED CAMSHAFT FOR CHINA. X5090. [Diagram 1 text] Ex. 10 11 In 40 39 EXHAUST 104° BTDC [Diagram 2 text] Ex. LEADS INLET BY 107.5° INLET CAM CENTRE 111° ATDC Inlet cam centre (180 - 34) / 2 =… | ||
| 01-page253 | Driving seat positions, pedals, and levers for the J.3. model. | ||
| View original record | TO BY FROM DA/EV. SECRET. DA/EVL/3.12.31. COPY TO SO. WDR. HS. DRIVING SEAT POSITIONS. X. 5770 J. 3. We send herewith N.Sch.3337 shewing the driving seat positions for J. 3. COLUMN AND SEATS. As… | ||
| 01-page254 | Cover note for scheme 3390, the general arrangement of J. 3., requesting blueprints and confirming printing feasibility. | ||
| View original record | COPY. X5770 BY. FROM DA. DAL/M8.12.31. (5770). C. to SG. HS. J. 3. GENERAL ARRANGEMENT. Herewith we send N.Scheme 3390. - General Arrangement of J. 3. as far as we have yet gone. Would you please send… | ||
| 01-page255 | Specifications for a sportier 25 HP car, with suggestions for modifications to increase speed. | ||
| View original record | 85770. To Sg. From Hs. c. to Wor. Hs.2/MJ.19.12.31. X 5010 25 HP. CAR. There have been several specifications for 25 HP. cars lately, which have asked for stiffer road springs and Hartford shock… | ||
| 01-page256 | The condition of an 18-GIV engine unit after a 10,000-mile test, detailing the state of various components. | ||
| View original record | To R. from Hs/Rm. C.c. H. C.c. WOT. R. C.c. D. EW. X5770. X5840. Hs/Rm.1/AD21.12.31. STRIP OF 18-GIV AFTER 10,000 MILE TEST. ENGINE UNIT. Oil. This unit has been run on Castrol XL oil. The most… | ||
| 01-page257 | Findings on the flywheel, clutch, and various chassis components. | ||
| View original record | Hg/NRM.1/ADEL.12.31 contd. -2- Flywheel and Clutch. - The automatic clutch spigot lubrication caused trouble as it was found to be erratic in behaviour. We have temporarily reverted to the original… | ||
| 01-page258 | Condition report on vehicle components, identifying an oil leak in the rear axle and wear issues with the pedals and gearbox. | ||
| View original record | Hs/Bm.1/ADEL.12.31 contd. -3- Rear Axle - Condition good except for shortage of oil on the brake actuating shafts. We found on investigation that the oil was running back along the small pipes which… | ||
| 01-page259 | Blueprint of a 25HP Rear Brake Actuating Shaft. | ||
| View original record | 25 HP REAR BRAKE ACTUATING SHAFT DRIVE FROM AT THIS POINT INSTEAD OF RUNNING BACKWARDS OVER AXLE | ||
| 01-page260 | Table of cylinder bore measurements showing diameter and wear after 15,000 miles. | ||
| View original record | CX - 19 GIV 17-12-31 BORES OF CYLINDERS AFTER 15000 MILES BORE N° | MEASURED AT | DIAMETER | WEAR 1 | CROWN | 3.1515 | .0015 1 | CENTRE | 3.1515 | .0015 1 | MOUTH | 3.151 | .001 2 | CROWN | 3.1513 |… | ||
| 01-page261 | Blueprint diagram illustrating a required alteration to the exhaust valve seating to prevent hammering. | ||
| View original record | H.S.495 EXHAUST-VALVES-HAMMERING INTO BOTTOM OF SEATING ANGLE OF GUIDE MUST HAVE ALTERED. INLET EXHAUST EXHAUST PORTS THIS PORTION OF SEATING CLEAR OF VALVE. G.W.H. 18 G IV 29-11-31 | ||
| 01-page262 | Photograph displaying two rows of engine bearing shells for examination. | ||
| View original record | ", | ||
| 01-page263 | Review of the 25 HP model's position and proposals for performance improvements and developments. | ||
| View original record | Sg. From Hy/Hs. C. Wot. A. 85770 Hs.1/W.25.13.31. X.5770. X.5123. 25 HP. We think it is useful to review the position of the 25 HP. and the possible developments. Commencing the last as in 'T' series… | ||
| 01-page264 | Comments on the performance of the experimental car 18.G.4 after a 10,000-mile test in France. | ||
| View original record | Bs. C. MX. C. MOT. SPLO/H28.12.31. X5770. Y5770. re. EXPERIMENTAL CAR - 18.G.4. With reference to my test of the above after its return from 10,000 miles test in France. The following are a few… | ||
| 01-page265 | Faults found on a vehicle, including issues with brakes, clutch, radiator, and electrics. | ||
| View original record | -2- (4) The brakes were quite good. I had no experience of groans or squeaks. The pedal, however, is nearly on the boards and the brakes require adjusting. To overcome the slack in the brake… | ||
| 01-page266 | List of specifications and modifications for the gearbox, propeller shaft, and other chassis components. | ||
| View original record | - 2 - 8. GEARBOX. This is to be the easy change type, and consists of the design which ran on 18-G-IV, with the sole exception of the reverse gear which is to be the later scheme including the fixed… | ||
| 01-page267 | Modifications for the final 25 chassis in the 'T' series. | ||
| View original record | x5770 E. Dent. S. Dent. Gr-Derby Pr-Derby STC. SDF. c. Hs. Gouldby W/HM RE LAST 25 CHASSIS IN 'T' SERIES A decision has been arrived at in Conference this afternoon as to how the last 25 chassis in… | ||
| 01-page268 | Proposed modifications for a Continental 20/25 engine, including wheels, axle, and compression ratio. | ||
| View original record | Hs X 577 O. IE 380 To Hs. from Sg. Copy to Mr. E. [struck through] By Day [struck through] re 20/25. SgE/MJO.12.31 Referring to Hs/Rml/MA.22.12.31 and Hs1/MJ.28.12.31 I quite agree that, when 18-G-4… | ||
| 01-page269 | 10,000-mile test, recommending a new chassis for production based on performance and sales potential. | ||
| View original record | HS. c. WOR. X5770 EPLO/H30.13.31. X5770 re. 18-G-4. 10,000 MILES TEST. Further to report reference EPLO/H28.14.31. I do not consider I have shown sufficient enthusiasm on the merits of this car as… | ||
| 01-page270 | Requesting an opportunity to test car 18-G-4 after modifications, before its return to France. | ||
| View original record | X5770. To Hs. from Sg. 20/25. Sg25/ES1.12.31 With further reference to Sg6/E30.12.31 before 18-G-4 goes back to France with the modifications referred to, I should like to be given the usual… | ||
| 01-page271 | Instruction to order material for 100 'U' series 20/25 HP chassis based on features from the 'T' series. | ||
| View original record | ROY. cr. Sft. cr. E. Dept. c. P. Dept. c. G. Dept. c. D. Dept. c. Hs. cr. BY/BL. X5770 BY/Cgh.11/G.31.12.31. RECEIVED 31 DEC 1931 20/25 HP. CHASSIS - 'U' SERIES. With reference to the special features… | ||