Rolls-Royce Archives
| Identifier | Entry | ||
| img001 | Use of bonnet shutters versus louvres for engine cooling. | ||
| View original record | HS. FROM R. C. to SG. WOR. G. to BY. DA. E. ORIGINAL COOLING OF CARS From the high pressure of air under the bonnet it is evident that we must work at increasing the means of getting the air away.… | ||
| img002 | The performance and issues observed with Mr. Sidgreaves' car, including suggestions for modifications. | ||
| View original record | HS. ) FROM R. sc.-) To WOR. FN. ORIGINAL Mr. SIDGREAVES' CAR. RECEIVED 31 OCT 1931 R2/M1.10.31. x7960. The first impression was that for London the springs or the tyres were too hard. It was reported… | ||
| img003 | Design, criticism, and testing of exhaust manifolds for various chassis types. | ||
| View original record | From E. C. to W.H. HS. P. EXHAUST MANIFOLDS. Referring to your memo. SG16/E21031., designs for improved manifolds for P. 1. chassis of both cast iron and aluminium head types were sent to H. on 25. 3.… | ||
| img004 | Schemes for rear springs and rear axle lubrication. | ||
| View original record | [strikethrough]FY.[/strikethrough] FROM D.A. C. to [strikethrough]SC.[/strikethrough] H.S. J. 3. REAR SPRINGS, ETC. DA3/M3.10.31. Y5410 Herewith we send N. sch. 3352. shewing the front anchorage of… | ||
| img005 | Development of a light 2-cycle compression ignition engine for Avro and other work, considering various design schemes. | ||
| View original record | SO. (Mr. HG) FROM H. F. C. to Mr. H. HS. ORIGINAL R2/M3.10.31. LIGHT 2 CYCLE COMP. IGNITION ENGINES FOR AVRO & OTHER WORK. K433. We must try to secure somewhat to ourselves (HR.) this type of engine… | ||
| img006 | Cover letter regarding original documents for the J. 3. Dynamo Drive and Rear End of Crankcase. | ||
| View original record | ORIGINAL. M. FROM E. [M. is struck through] C. to S. W.A. HS. [S. and W.A. are struck through] E3/MS.10.31. X5000. X5100. J. 3. DYNAMO DRIVE AND REAR END OF CRANKCASE. We send you herewith the… | ||
| img007 | The J.3 Crankshaft and Crankcase, sending a blueprint and detailing completed updates. | ||
| View original record | A. FROM E. ORIGINAL. C. to HS. J. 3. CRANKSHAFT AND CRANKCASE. E2/W3.10.31. X5010. X5060. We send you herewith the original of LeC. 2953 dealing with the above. Since sending you the blueprint of this… | ||
| img008 | The dynamo drive and timing wheel case, noting the lack of eccentric adjustment for the dynamo pinion centre. | ||
| View original record | B.L. FROM E. C. to S.L. W.H. HS. J. 3. DYNAMO DRIVE, TIMING WHEEL CASE ETC. E1/MS.10.71. x 5100 We send you herewith the original of Lec. 2957 showing the above. There are no means shown for eccentric… | ||
| img009 | Design of a thin web flywheel for the 'China' Chassis. | ||
| View original record | H. FROM E. C. to S̶C̶. W̶O̶. ES. ORIGINAL 'CHINA' CHASSIS. E2/45.10.31. X5300 Please receive herewith design of thin web flywheel - LeC. 2959. E. | ||
| img010 | Durability tests for the J. 3. & 4. gearbox reverse gear and the design of the reverse wheel retention keys. | ||
| View original record | HS. FROM DA. Copy to BY. S.S. DEPT. 31 OCT 1931 J. 3. & 4. GEARBOX. DA3/W6.10.31. X5310. With reference to HS/GRY1/WJ31031., would it not be desirable to run the reverse under full engine torque for… | ||
| img011 | Modifications for a J. 3. and 4. Gearbox, concerning the 3rd motion shaft, cone fixing, and rivets. | ||
| View original record | A. FROM L.A. C. to S.L. H.S. F.C. J. 3. AND 4. GEARBOX. YS3/O. Herewith we send R. sch. 3354. showing some modifications requested by the Expl. Dept. REVISED (1) The two diameters on the 3rd. motion… | ||
| img012 | Modifications to a P.2 twin choke carburettor's float mechanism. | ||
| View original record | B. FROM E. C. to SG. WR. HS. P. 2. TWIN CHOKE CARBURETTER. We send you herewith LeCs. 2960. and 2962., showing the modifications required to the above for counterbalancing the float mechanism. The… | ||
| img013 | Modifications to crankshaft balance weights. | ||
| View original record | B/. FROM E. C. to S/. W/. HS. 20/25. CRANKSHAFT BALANCE WEIGHTS. Y5010. E2/WS.10.71. Referring to BW16/G51031., we attach Lec. 2963. herewith shewing modifications to Sch. 1546. which we think… | ||
| img014 | Design of change gears, specifically the adoption of a synchromesh system. | ||
| View original record | HS. } FROM R. DA/HDY } ORIGINAL RECEIVED R1/MB.10.31. Sent off 28. 10. 31. X 523 X S 310 C. to SG. WOR. BY. C. to Mr. CLAREMONT CHANGE GEARS. We are up against a loss of RR. dignity in adopting the… | ||
| img015 | Scheme for a gearbox incorporating synchronised brakes, epicyclic units, and a jaw clutch drive. | ||
| View original record | (2) This scheme embodies: (1) R's idea of synchronised brakes applied to epicyclic. (2) R's idea of using bevel or other accelerating unit to reverse drive, thus avoiding any extra wheels etc for… | ||
| img016 | Design changes to the J.3 front axle and brakes, including sending relevant schemes. | ||
| View original record | ORIGINAL. F. FROM EA. C. to H. HS. J. 3. FRONT AXLE AND BRAKES EAL/213.10.31. x5420 x5360. Herewith we send N. Schemes 3349/50/51., showing the above. The axle has been dropped 1.25 compared with the… | ||
| img017 | Arrangement of transporting Sir John Prestige's old car to Derby. | ||
| View original record | SG. FROM E. C. to WR. HS. E1/W13.10.31. V447 re. SIR JOHN PRESTIGE'S OLD CAR. Referring to your memo. SG33/E121031., kindly note I took this matter up with R. yesterday - Monday - and he thought there… | ||
| img018 | Poor visibility of dashboard instruments and a proposal to change the pivot point of the needles. | ||
| View original record | M. FROM DA/EV. Copy to - HS. INSTRUMENTS. DA/EV5/14.10.31. Y5530 X7530 It is pointed out by Sales that in some cases fairly frequently the instruments on the upper part of the instrument board cannot… | ||
| img019 | Failure of side wheel carriers with diamond mounting and suggesting design improvements. | ||
| View original record | HS/RM. FROM DA/EV. C. to SG. BY SIDE WHEEL CARRIERS WITH DIAMOND MOUNTING. DA/EV3/M14.10.31. x7600 x5600. We thank you for your HS/RM2/AD21031., and the broken stays between the carrier and the… | ||
| img020 | Suggesting a method to test and identify power loss in an exhaust system by removing parts in stages. | ||
| View original record | HS/RM. FROM DA/EV. DA/EV4/M14.10.31. x7230 P. 2. EXHAUST SYSTEM. We thank you for HS/RM1/ADY1031., and note that at 3000 RPM. approximately 45HP. is lost in the standard silencer system. We can… | ||
| img021 | The Boyce electric clock and its suitability for the 20/25 instrument panel. | ||
| View original record | HS. FROM DA/EV. Copy to SG ORIGINAL INSTRUMENT BOARD CLOCKS. DA/EV1/W14.10.31. X6022 We note with interest the correspondence which has taken place concerning the Boyce electric clock. We have never… | ||
| img022 | Short internal memo regarding the departure time of Sir John Prestige's old car. | ||
| View original record | S/L. FROM E. C. to W.R. HS. re. SIR JOHN PRESTIGE'S OLD CAR. Kindly note the above left here this morning - Thursday - about 4.30 a.m. E. [Stamp: RECEIVED 15 OCT 1931] | ||
| img023 | Advantages and disadvantages of using solid eye versus rolled eye road springs. | ||
| View original record | P.T. FROM DA. Copy to HS. BY/HED DA1/W15.10.31. Y5L10 Y741D ROAD SPRINGS. Referring to BY/G121031, we had the impression that one solid eye was not regarded as a great disadvantage, and had the effect… | ||
| img024 | The conversion of a P. 2. petrol pump to direct acting. | ||
| View original record | [REDACTED] FROM E. S. TO [REDACTED], EE. E2/M15.10.31. 874/60 P. 2. PETROL PUMP CONVERTED TO DIRECT ACTING. We send you herewith LeC. 2961. showing the above. The same camshaft wheel with .250… | ||
| img025 | Technical memorandum describing the design of the J.3 petrol pump and drive. | ||
| View original record | ORIGINAL. S. FROM E. C. to S. H. MS. J. 3. PETROL PUMP & DRIV. EX/M15.10.31. x3060 We send you herewith LoC. 2966. dealing with the above. The pump chamber is the same as used on P. 2. but the… | ||
| img026 | Letter detailing modifications and additions to the J.3. crankcase. | ||
| View original record | FROM E. C. to S. W.H. MS. EA/15.10.31. J. 3. CRANKCASE DETAILS. X5009 We send you herewith LeC. 2964. showing some modifications and additions which it has been considered advisable to make. We would… | ||
| img027 | J.3. water pump and connection to the cylinder, noting a modification to the pump bracket. | ||
| View original record | FROM E. C. to S. W. H.S. ORIGINAL ES/A.15.10.31. x5180 J. 3. WATER PUMP & CONNECTION TO CYLINDER. showing the above. We send you herewith print of LeC. 2965. We will send the original as soon as the… | ||
| img028 | Methods for reducing engine vibrations to allow for a high-speed 6-cylinder engine in a continental tourer. | ||
| View original record | ORIGINAL. FROM R. C. to [REDACTED] HS. ENGINE VIBRATIONS. It seems pretty universally agreed that with the diamond mounting fitted with torque reaction dampers and soft rubber, and the crankshaft… | ||
| img029 | The scheme for balancing a 12/8 crankshaft using balance weights. | ||
| View original record | HS. ) FROM R. [strikethrough]COPY to SC. WOK[/strikethrough] ORIGINAL. BALANCING OF CRANK - 12/8 SCHEME OF BALANCE WEIGHTS. x634 x7010 x5010 I cannot see any reason why it should not be easy to… | ||
| img030 | Improvements to bonnet shutters by widening the gap and rounding the edges for a better appearance. | ||
| View original record | AJL See me Hs A. FROM TA/EV. C. to W. L. HS. BONNET SHUTTERS. DA/EV/W20.10.31. Y1085. Su. pointed out to me at the Salon that our shutters on the whole did not look quite as good as some we have seen,… | ||
| img031 | Impressions from a motor show, covering competitors, engine, gearbox, and suspension technologies. | ||
| View original record | SC. FROM R. ORIGINAL R1/W20.10.31. C. to WeH. HS. C. to BR. E. IA. IMPRESSIONS FROM THE MOTOR SHOW. Naturally one can see danger from several sources. The chief among them seem to be Lancaster and… | ||
| img032 | Report critiquing various cars, including the 25HP model, a Thrupp & Maberley body, and a Hispano 12 cyl. | ||
| View original record | (2) Of the 3 or 4 we have seen or heard of lately most of them have shortcomings which we should wish to avoid. Generally, several of the larger cars looked forbidding in their complication under the… | ||
| img033 | Design modifications and material choices for the 'U' Series - 25HP silencer. | ||
| View original record | P. FROM TA/EV. C. to F.W. HS. LA/EV/3/420.10.31. K5520. SILENCER FOR 'U' SERIES - 25HP. H. has agreed to the use of the P. 2. silencer for the short chassis as suggested and tested by yourselves for… | ||
| img034 | Requiring bigger silencers for the P.2. and 25HP exhaust systems. | ||
| View original record | FROM. R. C. to MR. H.S. C. to MR. [REDACTED] ORIGINAL R2/M20.10.31. x7230 x5220 P. 2. & 25HP. EXHAUST SYSTEMS. Experience at Derby is shewing that we require bigger silencers on both our cars, as with… | ||
| img035 | Exhaust silencers for the P. 2. & 'U' Series 25HP, favouring spot welding over riveting for cost-saving. | ||
| View original record | HS. ) FROM R. BY. ) C. to S.. WOR. D.. EXHAUST SILENCERS - P. 2. & 'U' SERIES 25HP. R5/M/20.10.31. X7220 X5220 We agree that P. 2. short silencer should be used, but we think this can be made equally… | ||
| img036 | Recommendation to increase the back axle ratio by 10% for better speed and efficiency. | ||
| View original record | HS. ) FROM R. BY. ) C. to BG. WOR. 27-EX. R6/B/28.10.31. T XII x 7120. 1527 We think that since the acceleration is so good the back axle can be 10% higher. When at 90 MPH. you should gain 8HP. This… | ||
| img037 | Impact of a tyre change on car height and proposing alternative wheel and rim sizes. | ||
| View original record | FROM DA/EV. HS. ) Copy to BB. DA/EV2/20.10.31. Y5820. X5810. 25HP. TYRES & WHEELS. We have just discovered that last Sept. a change was made from Dunlop silent to Dunlop Fort silent tyres, and that… | ||
| img038 | Modification to the J.3. water inlet pipe and pump bracket. | ||
| View original record | S. FROM E. C. to S. W.S. EC. ORIGINAL. E1/M21.10.31. J. 3. WATER INLET PIPE AND PUMP. X 5180 We send you herewith the original of W.C. 2965., shewing the above. Attention is drawn to a slight… | ||
| img039 | Investigation into a broken exhaust manifold and a proposal for a redesigned, telescoping version to cure the problem. | ||
| View original record | HS. ) FROM R. & E. R1/W21.10.31. Sent off 24.10.31. 'CHINA' BROKEN EXHAUST MANIFOLD. Y5230. We have spent considerable time on examining this problem. Personally I concluded that it had nothing… | ||
| img040 | Record of a telephone conversation discussing Phantom II balance weights, 20/25 HP exhaust pipe failures, and Phantom II frames & fittings. | ||
| View original record | Hs. BT/Ogh BX/6G BY.2/G.22.10.31. RECEIVED X 7010. X 5230. X 7380. TELEPHONE CONVERSATION WITH W.W. 21.10.31. --------------------------------- PHANTOM II. BALANCE WEIGHTS. E. remarked over the 'phone… | ||
| img041 | Outlining the procedure for submitting new part drawings to avoid waste and delays. | ||
| View original record | X. FRO. E. ORIGINAL. Copy to BG. TOF. Copy to HS. Des R1/422.10.31. CAR WORK - NEW DESIGNS. JAPAN 7. & PEREGRINE 1. X57-0. Y4077. RECD 4.XI.31 PEREGRINE. To avoid waste and delay it is understood that… | ||
| img042 | Development strategy for synchro mesh and epicyclic gear units. | ||
| View original record | e.c. ) FROM R. ES. ) C.C. TO WCM. TA. F. P. 2. - L.H. & R.H. EASY AND SILENT CHANGE. X7310. You are quite right, we intended to go on with the synchro mesh for P. 2. I am not at all definite whether… | ||
| img043 | That the starter switch press button should be located on the dashboard. | ||
| View original record | HS. FROM R. C. to BODY WORKS. BY. ["to BODY WORKS." is struck through] ORIGINAL R1/M23.10.31. X6080 re. STARTER SWITCH PRESS BUTTON. It is agreed that this should be on the dashboard, and not on the… | ||
| img044 | Agreed features for production aero engines and items for experimental trial. | ||
| View original record | FROM R. HS. AERO WORK. It was agreed during the visit of RG. and HS. on Friday the 16th. inst., that the following features should be included as soon as ever possible in production engines: (1) Nitro… | ||
| img045 | Proposing a 10,000-mile test for an improved 20/25 exhaust manifold on the 'China' chassis. | ||
| View original record | M. FROM E. ORIGINAL. HL/28.10.31. C. to S. W. R. HS. IMPROVED 20/25. EXHAUST MANIFOLD. x5230. We send you herewith Lec. 2677. shewing the stove. It would be of great advantage if this design of… | ||
| img046 | The lead given to the 2nd motion wheel on the 25HP synchro-mesh gearbox. | ||
| View original record | HS. FROM DA. ORIGINAL DA2/M26.10.31. C. to SO. WOR. DY. 25HP. SYNCHRO MESH GEARBOX. X531D. With reference to HS/GRY1/KT241031., the last para., we should like to point out that on the N. schemes the… | ||
| img047 | Tyre and wheel specifications, rolling radius, and clearances for the 25HP model, including requests for new wheel sets for testing. | ||
| View original record | Dx FROM DA/EV. HS. Copy to SC L'ORIGINAL DA/EV1/W26.10.31 25HP. TYRES AND WHEELS. x 5820. x 5910. We thank you for BY4/G191031. and HS/FW5/AD231031. We do not wish to raise an argument unnecessarily… | ||
| img048 | Requesting a custom set of instruments with Venetian cream dials for a Special Touring Saloon. | ||
| View original record | HS. FROM DA/EV. ORIGINAL. DA/EV2/W26.10.31. C. to BY. EN. SPECIAL TOURING SALOON FOR R. JC X5992 Will you please send a complete set of instruments to Park Ward that will be used on the car they are… | ||
| img049 | Modifications to bonnet shutters, including increasing the radius and the gap between the shutter and bonnet. | ||
| View original record | HS. FROM DA/EV. ORIGINAL DA/EV3/M26.10.31. C to SC. WDR. EV. BONNET SHUTTERS. X1088. Mpho. We thank you for HS/LID2/KT221031. We looked at the shutters on the N. 2. series cars at Olympia, and after… | ||
| img050 | Design and testing of a P.2 synchro mesh gearbox, specifically concerning the power of the cones and clutch inertia. | ||
| View original record | HS. FROM DA. ORIGINAL DA1/M26.10.31. x7310 C. to SG. WOR. BY P. 2. SYNCHRO MESH GEARBOX. We are laying out a synchro mesh engagement for the top and 3rd. speeds on P. 2. on the lines of the 25H.P.,… | ||
| img051 | Explaining that it is impossible to concentrate solely on project Japan 3, but work is being pushed to finish before Christmas. | ||
| View original record | FROM E. C. to W. ES. JAPAN 3. E1/W26.10.31. X5770 In reply to your memo. SG4/L231031., the remarks made during your visit of September to WW. with regard to Japan 3. referred to the engine section… | ||
| img052 | Technical memorandum discussing seizing bushes and gear creep in the 'China' Easy Change Gearbox. | ||
| View original record | HS/GRY. FROM R. C. to SO. WOR. C. to BY. DA. 'CHINA' - EASY CHANGE GEARBOX. The engagement of the reverse was shewn on the WW. drawing to have .100" lead between the moving wheel and the resting… | ||
| img053 | Boyce electrical self-winding clock and a potential alternative from Ferranti. | ||
| View original record | HS/WST. FROM R. [Struck through: C. to SG. WOR. BY.] re. BOYCE CLOCK. ELECTRICAL SELF WINDING. R2/W27.10.31. [Handwritten: X6022, X6026] [Stamp: RECEIVED 1931 OCT] I think this is probably made in U.… | ||
| img054 | Ignition coil design and the development of a cheaper starter for the Japan 3 & Peregrine chassis. | ||
| View original record | HS/WST. FROM R. [Struck through text: C. to GG. WOR. BY.] ELECTRICAL WORK, IGNITION & STARTER. [Stamped: RECEIVED] [Handwritten: X6058 X5620] I understand that you are expecting WW. to send you a… | ||
| img055 | Short memo confirming the non-receipt of prints for J. 3. Details at WN. | ||
| View original record | EH. FROM E. C. to Mr. HS. JAPAN 3. E2/M29.10.31. Referring to the second part of your memo. BY1/G271031., we cannot trace having received any prints of J. 3. Details at WN. E. | ||
| img056 | Low-temperature problems and potential solutions for the Buzzard engine on a Hawker Horsley aircraft. | ||
| View original record | HS/LOV. FROM R. C. to CG. WOR. RG. C. to BY. E. IB. EP. R1/M/30.10.31. X1908 AERO ENGINES - FLIGHT TESTS AT TOLLERTON ON HAWKER HORSLEY - BUZZARD ENGINE. Referring to HS/LOV5/KT2/1031., this is… | ||
| img057 | Engine design choices, component development, and project philosophy regarding the 'Japan 1 Unit'. | ||
| View original record | HS/RM. ) FROM R. BY. C. to BG. WOR. RG? C. to Br-D? R2/M30.10.31. x5770 re. JAPAN 1. UNIT. We are very pleased to see that this can give 94HP. You will remember that for many reasons I wanted this… | ||
| img058 | Differences in the P. 2 gearbox sliding gears compared to the 25HP model. | ||
| View original record | HS. FROM DA. ORIGINAL P. 2. GEARBOX. We notice that in the case of the sliding gears for the 1st. and 2nd. speeds the 25HP. has the boss flush with the teeth, while in the P. 2 the boss overhangs the… | ||
| img059 | Alterations to the J. 3. engine and radiator suspension, specifically the radiator's forward position. | ||
| View original record | EA. FROM E. S. to SC. WOR. C. to MS. DA J. 3. ENGINE & RADIATOR SUSPENSION. EL/31.10.31. X5005 X5250 We send you herewith LeC. 2967. showing the above. This scheme also shows the cross member… | ||
| img060 | Design and performance issues of petrol pumps, comparing different models. | ||
| View original record | HS. FROM R. C. to CC. WOR. BY. P. 2. PETROL PUMPS. R2/M31.10.31. x7460 [STAMPED: RECEIVED] Your test would suggest that both A-C. and our own design works at its best somewhat erratically, as one… | ||
| img061 | Modified water connection between the pump and cylinder block for the J.3. engine. | ||
| View original record | BY. FROM E. ORIGINAL. EZ/M31.10.31. C. to gb. WPB. HS. J. 3. MODIFIED WATER CONNECTION BETWEEN PUMP AND CYLINDER BLOCK. X5180 We send you herewith LeC. 2566. shewing the above. This is to overcome the… | ||
| img062 | Colour of instrument dials for a 25HP Special Touring Saloon, specifically requesting Venetian cream instead of black. | ||
| View original record | ORIGINAL HS. FROM DA/EV. DA/EV2/M2.11.31. C. to BY. HN. 25HP. SPECIAL TOURING SALOON FOR R. x 5992. We thank you for HS/LID1/KT281031., and note that you have made arrangements for the 18" rims, for… | ||
| img063 | Machining and balancing of crankshaft weights, with a reference to a Chrysler scheme. | ||
| View original record | HS. FROM R. C. to SG. WOR. BY. ORIGINAL. R1/M2.11.31. CRANKSHAFT BALANCE WEIGHTS. X 5010 I cannot understand why you fear getting the Chrysler scheme incorrect in balance, because if the eight smaller… | ||
| img064 | Request for a newly discovered electrical petrol gauge for testing and potential replacement of the Hobson gauge. | ||
| View original record | HS. FROM DA/EV. W STOKE HALL DA/EV1/M3.11.31. Copy to - BY. ELECTRICAL PETROL GAUGES. X4523 We understand that you have discovered a petrol gauge which operates electrically, and which you would like… | ||
| img065 | Proposals for improving the lubrication of the reverse shaft on the 25HP synchromesh gearbox. | ||
| View original record | FROM I.A. ORIGINAL DA2/A3.11.31. C. to HS. 25HP. SYNCHRO MESH GEARBOX. X 5310. Herewith we send a scheme 3759. showing two proposals for improving the lubrication of the reverse shaft on this box. One… | ||
| img066 | Bearing tests for a synchromesh gearbox and assumptions made about shaft hardening and bearing loads. | ||
| View original record | HS. FROM DA. @RY See me HS Copy to DY SYNCHRO MESH GEARBOX. DA1/W4: 14.11.31 X5310 Referring to the tests on the reverse we presume that all these tests for the bearings standing up are done with a… | ||
| img067 | Technical memo detailing modifications to the Japan P. engine and radiator suspension system. | ||
| View original record | ORIGINAL B. FROM E. C. to SG./DR. HS. JAPAN P. ENGINE AND RADIATOR SUSPENSION. EL/25.11.31. X5605. X5250. Further to our conversation of this afternoon we send you herewith the original of LeC. 2947.… | ||
| img068 | Mathematical comparison and specification for a J.3 propeller shaft, referencing 20HP and 25HP models. | ||
| View original record | FROM DA/EV. Copy to - HS. ✔ J. 3. PROPELLER SHAFT. ORIGINAL DA/EV1/W5.11.31. HS 85340. We thank you for your BY3/G31131. Our suggested 2.5" dia. for J. 3. is based on the mathematical comparisons with… | ||
| img069 | Propeller shaft clearances, axle rebound, and crossmember modifications for the 25HP model. | ||
| View original record | (2) With reference to W. 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… | ||
| img070 | Telephone conversation regarding the design and production status of 20/25 HP exhaust manifolds. | ||
| View original record | c. E. Dept c. Hs. c. NHC. c. BY/Oph e. BY/Job BY.7/G.6.11.31. W5230. TELEPHONE CONVERSATION WITH WEST WITTERING - 6.11.31. 20/25 HP. EXHAUST MANIFOLDS. E. was asking us how far we had progressed with… | ||
| img071 | Proposed foolproof aero engine cylinder design with integral jackets and a detachable head. | ||
| View original record | RG. ) FROM R. HS. ) PY. ) C. to SG. WOR. ORIGINAL R1/W6.11.31. 83866 AERO ENGINE CYLINDERS. Since we naturally think cylinder construction could be more foolproof - i.e. requiring less skill and care… | ||
| img072 | Blueprint L.e.C. 2567 concerning the J.Z. fan drive, exhaust pipe, and water connections. | ||
| View original record | P/F. FROM E. C. to S. WG. JS. ORIGINAL E2/47.11.31. X5770 J. Z. FAN DRIVE, EXHAUST PIPE, WATER CONNECTIONS, & DRAIN TAP. BLUEPRINT 2569 We send you herewith LeC. 2567. dealing with the above. We are… | ||
| img073 | Reminder to measure pedal pressure on the latest 20/25 clutch and provide particulars. | ||
| View original record | HS. FROM DA. ORIGINAL. DA2/W7.11.31. X5480 This is to remind you that you are going to measure the pedal pressure on the latest 20/25. clutch and send us full particulars as to the leverage, spring… | ||
| img074 | The J.3 Exhaust Manifold design and blueprint LeC. 2570. | ||
| View original record | FROM E. C. to Mr. HS. J. 3. EXHAUST MANIFOLD X5230. BLUEPRINT We send you herewith LeC. 2570. showing the above. In this design the pipe flanges are secured by clamps and there is no chance whatever… | ||
| img075 | Progress report on the design and development work for the J.3 engine. | ||
| View original record | SCL ) FROM E. WOR. ) C. to HS. BY. JAPAN 3. NS We are concentrating on that part of the design work required for getting a J.3. engine running on the bench, as there is much useful work that can be… | ||
| img076 | Simpler reverse gear scheme for the P. 2. gearbox. | ||
| View original record | RH.) FROM R. HS.) HS. ) O. to BG. WGR ORIGINAL R1/7.11.31. Y7310. P. 2. GEARBOX. We have a very good and simple reverse. The introduction of the helical 3rd. speed gave us the trouble of providing an… | ||
| img077 | Design and material choices for brake drums, comparing wrought steel, cast iron, and other combinations. | ||
| View original record | FROM R. ORIGINAL R1/M9.11.31. X4612 BRAKE DRUMS. The thin flexible wrought steel brake drums were considered many months ago to be unsatisfactory, so we went back to an earlier design which the Expl.… | ||
| img078 | Departing from the common S.U. pattern carburetter towards a new single semi-expanding design. | ||
| View original record | HS. FROM R. C. to SG. WOR. EX. CARBURETTERS. We want to depart from the very common S.U. pattern for various reasons. Amongst others the reputation of this pattern is not very good owing principally… | ||
| img079 | Merits and drawbacks of using electrical petrol pumps over mechanical alternatives. | ||
| View original record | HS. FROM R. ORIGINAL. C. to CG. WOH. BY. ELECTRICAL PETROL PUMPS. R3/W9.11.31. You will remember that I did not encourage the use of these as I considered they were quite unnecessary, and undesirable… | ||
| img080 | Car design work, focusing on the petrol gauge, ignition coil, and exhaust pipes. | ||
| View original record | HS. ) FROM R. DX. ) R2/M10.11.31. x5770. y4027. C to SC WOR (Struck through) CAR DESIGN WORK. We are working on many problems as well as finishing some urgently wanted designs which you also require… | ||
| img081 | Pump connections, engine support, and carburetter design for the J.3 & Peregrine models. | ||
| View original record | (2) PUMP CONNECTIONS & ARRANGEMENT - J. 3, & 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… | ||
| img082 | Issues with wooden finishers, headlamp options, and wing stays for a special touring saloon. | ||
| View original record | HS 11/11/ ORIGINAL DA/EV2/W10.11.31. M. FROM DA/EV. X5992 Copy to HS. 20-G-4. - SPECIAL TOURING SALOON FOR R. We return herewith the sample wooden finishers about which I spoke to you on the 'phone.… | ||
| img083 | Modifications to rear dumb irons to provide bumper pads. | ||
| View original record | F. FROM DA. C. to SG. HS. ORIGINAL DA1/M10.11.31. J. 3. FRAME - DUMB IRONS. X 5380. Herewith we send N. sch. 3360. shewing modifications to the rear dumb irons to provide bumper pads of a type giving… | ||
| img084 | Modified front and rear dumb irons for P. 2. bumper fixings. | ||
| View original record | Ex. FROM DA. ORIGINAL DA2/M10.11.71. C. to SC. HS. P. 2. BUMPER FIXINGS. x7380 We send herewith N. sch. 3361. showing modified front and rear dumb irons to enable bumpers to be fitted, and which will… | ||
| img085 | The clutch arrangement for J. 3, referencing scheme 3362. | ||
| View original record | ORIGINAL. FROM DA. C. to HS. J. 3. CLUTCH. DA1/W11.11.71. x5480. Herewith we send R. scheme 3362, showing the arrangement of the clutch for J. 3. We shall be sending you shortly some further… | ||
| img086 | Drawings for the J.3 Exhaust Manifold & Pipe, noting a modification to the joint. | ||
| View original record | ORIGINAL B/. From H. E1/411.11.31. C. to MR. HS. J. 3. EXHAUST MANIFOLD & PIPE X5230. We send you herewith Loc. 2972. showing side view of the above, also the originals of Loc. 2966. and 2970.… | ||
| img087 | Layout of scheme 3304, a Synchro Mesh Gearbox for the P.2 model. | ||
| View original record | B/. FROM DA. C. to F/G. HS. P. 2. GEARBOX. X7310. We send herewith M. scheme 3304. - Layout of the Synchro Mesh Gearbox for P. 2. The design as shewn is for unit construction. Should it be ultimately… | ||
| img088 | Suggestion to adopt the 'Jackall' 4-wheel hydraulic jacking system due to the inadequacy of the current one. | ||
| View original record | HS. FROM DA/EV. LID ORIGINAL See me RECEIVED 13 NOV 31 DA/EV2/M13.11.31. P. 2. JACKS. X3117. Due to the use of aprons and bumpers, and of the general covering in of the front and back of the car we… | ||
| img089 | Replacing the instrument board dipping switch with a foot-operated switch for the 20/25 model. | ||
| View original record | St. FROM DA/EV. C. to SG. WOH. C. to HS. CL. LID Sec me ORIGINAL. 25hP. DIPPING LAMPS. DA/EVL/A13.11.31. X6072 X-555 We further discussed with SG. yesterday the problem of providing cheaply and simply… | ||
| img090 | The introduction and positioning of Lucas headlamps on the 25HP model. | ||
| View original record | FROM DA/EV. C. to SG. HS. DA/EV4/N13.11.31. 20/25. HEADLAMPS X5800. As soon as possible we are going to use R.170. S.E.L. Lucas headlamps on the 25HP., and we wish as, soon as possible also to raise… | ||
| img091 | 2-stroke compression ignition engine seen at the Commercial Motor Transport Exhibition. | ||
| View original record | FROM E. CHP ORIGINAL C. to G. W. H. HS. PH. COMMERCIAL MOTOR TRANSPORT EXHIBITION. 2 STROKE COMPRESSION IGNITION ENGINE. The most interesting exhibit in the way of engines is without doubt the Junkers… | ||
| img092 | Trojan pistons, Junkers engine maintenance, and 4-stroke compression ignition engine principles. | ||
| View original record | (2) The Trojan piston is only 2.5" dia. and no doubt its small size helps. Decarbonising of the Junkers would be accomplished by dismantling one crankshaft and removing one set of pistons, but this… | ||
| img093 | Advance print for an expanding updaught single choke carburetter for the continental Phantom. | ||
| View original record | ORIGINAL. FROM E. E2/M.14.11.31. X7080 C. to HS. EXPANDING UPDAUGHT SINGLE CHOKE CARBURETTER - P/2. We send you herewith an advance print of LeC. 2972. shewing the above. This is a single carburetter… | ||
| img094 | Purchase of competitor cars for analysis and comparing production costs and materials for the 'Peregrine' project. | ||
| View original record | HS. FROM R. [REDACTED] re. "PEREGRINE". Referring to your HS2/MJ131131., we at WW. are not in favour of buying a Fiat as being of any assistance with reference to our "Peregrine". We should not expect… | ||
| img095 | Use of long toed cams and steel push rods to manage tappet clearance and noise. | ||
| View original record | HS. FROM R. C. to SG. WOR. BY. [crossed out] TAPPET CLEARANCE. R4/M16.11.31. Sent off 19.11.31. X 7090. X 5090. For very many years we have tried to introduce a long toed cam as a means of getting… | ||
| img096 | 4-stroke compression ignition engines from the Commercial Motor Transport Exhibition. | ||
| View original record | X. FROM E. CHP ORIGINAL C. to X. R. X. HS. X. RECEIVED NOV 18 E1/M16.11.31. VG31. X4433. COMMERCIAL MOTOR TRANSPORT EXHIBITION. (CONTINUED FROM - E1/M14.11.31.) 4 STROKE COMP. IGNITION ENGINES.… | ||
| img097 | Technical analysis of a Mercedes-Benz C.I. engine's balance weights and a comparison with a Daimler petrol engine's valve gear and cam design. | ||
| View original record | (2) On the Mercedes-Benz 6 cyl. C.I. engine balance weights are fitted apparently solely for relieving the inertia loading on the central bearing, since they are arranged as shown in the sketch. The… | ||
| img098 | Carburettor configurations, comparing single versus double setups, and considering a new semi-expanding carburettor design. | ||
| View original record | HS. FROM R. C. to SG. WOR. BT. R5/M16.11.31. Sent off 19.11.31. X7080 X5080 X1487 CARBURATION. We have for a long time understood that it is advisable with double carburetters to have some connection… | ||
| img099 | N. scheme 3363 for the J. 3. clutch pit, revised clutch operating gear, and front brake differential. | ||
| View original record | FROM D.A. C. to HS. J. 3. CLUTCH PIT & CLUTCH OPERATING GEAR, ETC. DA1/W17.11.31. x5480. Herewith we send N. scheme 3363. showing the clutch pit, the revised clutch operating gear which supersedes the… | ||
| img100 | The stiffening of a reverse shaft for a 25HP synchro-mesh gearbox. | ||
| View original record | FROM DA. C. to HS. 25HP. SYNCHRO MESH GEARBOX REVERSE. DA2/M17.11.31. X 5310. Herewith we send N. sch. 3367. showing the reverse shaft stiffened following the results of the recent experiments. It… | ||
| img101 | Use of a 3-inch propeller shaft on the J. 3 model for an increased safety margin. | ||
| View original record | Y. FROM DA. C. to HS. J. 3. PROPELLER SHAFT. DA5/M18.11.31. X5340. We have looked into the question of propeller shafts and though we think that the 2.250 shaft we have proposed is as good as a 3"… | ||
| img102 | Addition of a cored hole in the crankcase wall to prevent oil accumulation in the camshaft chamber. | ||
| View original record | FROM E. C. to MR. HS. El/W18.11.31. x 5090 J. 3. VALVE ROCKER COVER AND OILFILLER CAP. We send you herewith LeC. 2973. dealing with the above. To avoid holding up the oil in the camshaft chamber we… | ||
| img103 | Bearing issues and proposed solutions for a synchro mesh gearbox. | ||
| View original record | HS. FROM DA. C. to DY. RHC. RHC DA4/M18.11.31. SYNCHRO MESH GEARBOX. x5310. There was a criticism of the bearings on the 3rd. motion shaft in the original comments on the synchro mesh box. Would you… | ||
| img104 | Load on the spigot bearing in a 25HP Synchro Mesh Gearbox. | ||
| View original record | HS. FROM DA. RHC ORIGINAL DA2/W18.11.31. C. to DY. RHC. 25HP. SYNCHRO MESH GEARBOX. x5310 We have seen notes on a telephone conversation re. the above box, and wish to comment on ES' remark that the… | ||
| img105 | Experimental application of features from design J.3 to a 20/25HP clutch. | ||
| View original record | FROM DA. C. to S/L. HS. 25HP. CLUTCH. DA1/W18.11.31. X5480 Herewith we send N. sch. 3363., which shews the application experimentally to the present 20/25HP. clutch of some of the features intended… | ||
| img106 | Scheme N. sch. 3248 for the J.3. Rear Shock Damper mounting. | ||
| View original record | ORIGINAL. BY. FROM DA. DA/19.11.31. C. to HS. J. 3. REAR SHOCK DAMPER. 15520 Herewith we send N. sch. 3248. showing the mounting in the frame of the rear shock damper. This has been delayed by work on… | ||
| img107 | Requesting prints and tracings for the 25HP Special Touring Saloon body. | ||
| View original record | ORIGINAL LTD. FROM DA/EV. DA/EV3/M19.11.31. C. to HS. H. 25HP. SPECIAL TOURING SALOON. x7120. x5992. We send herewith N. schs. 3327/28. showing the particulars of the special touring saloon body for… | ||
| img108 | Requesting a progress update on modifications to the epicyclic gearbox for car 27-EX. | ||
| View original record | H. FROM DA. Copy to HS. DA1/M20.11.31. X 7310. X 7100. With reference to the epicyclic gearbox on 27-EX., would you please tell us how the modifications contained in N. schemes 3296/7, etc, are… | ||
| img109 | Selection and preparation of a car for 'R.' for use in France. | ||
| View original record | HS. FROM DA/EV. ORIGINAL CONFIDENTIAL DA/EV1/M20.11.31. x899v. Copy to BB. re. CAR FOR R. IN FRANCE. R. mentioned the night before last the matter of a car for his use in France this winter, and at… | ||
| img110 | Brake system developments for public service vehicles from the Commercial Motor Transport Exhibition. | ||
| View original record | FROM E. C. to S/W.R. F.C. & H. ORIGINAL 21 NOV 1931 E1/W21.11.31. X631 COMMERCIAL MOTOR TRANSPORT EXHIBITION. (CONTINUED FROM E1/W14.11.31. & E1/W16.11.31.) BRAKES. Brakes on public service vehicles… | ||
| img111 | The Dewandre braking system and the Dennis worm and nut steering box. | ||
| View original record | (2) A 3 unit Dewandre system is used on some chassis in which a main unit operates the rear brakes by mechanical means in the usual way, and two smaller units mounted on the front brake anchorages… | ||
| img112 | The transmission and springing systems of various bus and coach chassis. | ||
| View original record | (3) TRANSMISSION. The Daimler bus and coach chassis is equipped with the fluid flywheel and Wilson epicyclic box. A model of the epicyclic brake shows how a balanced anchorage is obtained by having… | ||
| img113 | Experiments to regulate oil flow for automatic clutch spigot lubrication. | ||
| View original record | HS. FROM DA. AUTOMATIC CLUTCH SPIGOT LUBRICATION. With reference to HS/RM2/AD201131, we suggest that we ought to make some experiments with this lubrication to see if it cannot be better regulated… | ||
| img114 | Experimental adaptation of a reverse gear for the 20/25 Synchro Mesh Gearbox. | ||
| View original record | FROM DA. C. to HS. 20/25 SYNCHRO MESH GEARBOX. X5310 We send herewith N. sch. 3374, shewing the type of reverse gear shewn on N. sch. 3364, adapted to the present 25HP. synchro mesh gearbox - that is… | ||
| img115 | Weight and thickness of cast iron brake drums. | ||
| View original record | HS. FROM DA. Copy to BY BRAKE DRUMS. X4612. With reference to HS/RM3/WJ141121., we should like to make the following remarks: (1) Cast iron is normally about 10% lighter than steel, but the figures… | ||
| img116 | New schemes for pedal mountings and their modification to suit a new gearbox. | ||
| View original record | Y. FROM DA. C. to HS. J. 3. PEDALS, ETC. ORIGINAL DA/W24.11.2.18/XI £ x5470 Herewith we send N. schemes 3370/1/2, showing the mounting of the pedals. In general they follow the original Japan schemes,… | ||
| img117 | New type of expanding carburettor and its adaptation for the Phantom. | ||
| View original record | B/. FROM E. C. to S/. W/. HS. E1/424.11.31. K7080. P. 2. NEW TYPE EXPANDING CARBURETTOR. We send you herewith the original of LeC. 2972., shewing the above. We are now proceeding with the scheme of… | ||
| img118 | Challenges and future development directions for compression ignition engines. | ||
| View original record | Sgd. FROM R. ORIGINAL C. to WGR. RG. HS. BX. XU 433 COMPRESSION IGNITION ENGINES. The trouble with compression ignition engines is that unless the speed and M.E.P. is high they are too heavy. The long… | ||
| img119 | Cover note for scheme 3378, detailing the actuating gear for a P.2 synchromesh gearbox. | ||
| View original record | BY. FROM DA. C. to SG. HS. P. 2. SYNCHRO MESH GEARBOX. ACTUATING GEAR. x7310 Herewith we send N. scheme 3378. shewing the actuating gear for the above box. We have done this as we wish to get the gear… | ||
| img120 | Automatic system for extra cylinder lubrication. | ||
| View original record | P/. FROM E. C. to SG. WH. HS. (Note: SG. and WH. are struck through) EL/26.11.31. YU 355. J. 3. EXTRA CYLINDER LUBRICATION. We send you herewith LeCs. 2974/75/76., dealing with the above. To overcome… | ||
| img121 | Scheme 3375, which shows the striking mechanism for a 25HP Synchro Mesh Gearbox. | ||
| View original record | BY. FROM DA. C. to SG. HS. DA4/426.11.31. 25HP. SYNCHRO MESH GEARBOX. X5310 Herewith we send N. scheme 3375. shewing the striking mechanism for use with the reverse gear shewn on N. scheme 3369. DA. | ||
| img122 | Design changes for the rear end of the 'Japan 3' model, including the petrol tank, luggage carrier, and exhaust. | ||
| View original record | ORIGINAL B. FROM DA/EV. C. to S. W. HS. JAPAN 3. - REAR END. DA/EV1/426.11.31. We send herewith N. schs. 3376/77. shewing the petrol tank, luggage grid, rear apron, 1st. and 2nd. crossmembers, and… | ||
| img123 | Proposal for a new sports chassis, suggesting the Peregrine model and outlining its key features. | ||
| View original record | SG. FROM R. C. to MR. HS. BY. PROPOSED SPORTS CHASSIS. R1/W28.11.31. Sent off 30.11.31. X4037 During the visit of HS. to WW. on the 27th. inst., we considered the proposed sports chassis, and find… | ||
| img124 | Selection of ammeters and self-winding clocks for cars, recommending against Lucas and in favour of Weston, Elliott, or Ferranti for ammeters and the Boyce type for clocks. | ||
| View original record | HS. FROM R. WST C. to SC. WOR. PY. R2/W28.11.31. Sent off 30.11.31. X6132. X6082. INSTRUMENTS FOR THE CARS. (re. VISIT OF HS. AND WST.) AMMETER. The price we pay and the delicacy of the ammeter makes… | ||
| img125 | Improving the torsional stiffness of larger car frames by using the engine as a stiffening component. | ||
| View original record | HS. FROM R. R3/W28.11.31. Sent off 30.11.31 8634. x7380. C. to SG. ROW. DV. [struck through] re. LARGER CARS. My impression is that we must do something to improve these in torsional stiffness so that… | ||
| img126 | Future dynamos, suggesting a move to a 2-stage vibrator type for better output and control. | ||
| View original record | HS/WST. FROM R. C- to SG. NOR. BY. re. FUTURE DYNAMOS. R4/428.11.31. Sent off 30.11.31. X6099 We long ago pointed out to Mr. Clarke that better output and better automatic control can be obtained with… | ||
| img127 | Change in ignition coil design and a comparison of L.T. contact makers. | ||
| View original record | HS/WST. FROM R. C to SC, WOB, BY ELECTRICAL IGNITION. R5/M28.11.31. Sent off 30.11.31. X6017 X6118 X5075 COILS. We arranged to proceed with a change of design of coil with the external primary. We do… | ||
| img128 | Various design options for compression ignition engines, including sleeve, double piston, and Junkers types. | ||
| View original record | To. RG. } FROM R. HS. } C H Parkinson R9/M28.11.31. Sent off 30.11.31 C. to SG. WOR. BY. COMPRESSION IGNITION ENGINES. XU 33. It was realised that we had made very little progress recently, also that… | ||
| img129 | Conversion mounting modification for the front shock damper. | ||
| View original record | HS. FROM R. C. to SC. WOR. C. to EY. DA. P. 2. CONVERSION MOUNTING. R6/M28.11.31. Sent off 30.11.31. x7005. Owing to the increased size of the torque dampers certain inconveniences have been found in… | ||
| img130 | Examination of a J.3 cylinder head casting and potential modifications. | ||
| View original record | ORIGINAL. HS. FROM R. R7/M28.11.31. Sent off 30.11.31. Y5050. J. 3. CYLINDER HEAD. We examined the head casting and are very pleased to see the progress made, and the very satisfactory casting. We are… | ||
| img131 | Goshawk I engine and its suitability compared to other engine models for a speed programme. | ||
| View original record | HS. FROM R. ORIGINAL. GOSHAWK 1. ENGINE. R8/428.11.31. 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 objections to… | ||
| img132 | Carburation options of a single versus dual carburetter setup for 6-cylinder engines. | ||
| View original record | HS. FROM R. HOME [strikethrough]C. to SC. WOR. BY.[/strikethrough] P. 2. & J. 3. - CARBURATION. X708. X5080. It is now pretty definitely established that we must have a through pipe for all the 6… | ||
| img133 | Proposal regarding the design and implementation of longer, rivetless bonnets for the 25 HP model. | ||
| View original record | TO [stamp] FROM DA/EV. ORIGINAL BVI/26.11.31. COPY [stamp] HS. x5-60. LONGER BONNETS. 25.HP. We thank you for your BY/Cgh4/G.25.11.31. and the attached drawing and memos re the above. We have long… | ||
| img134 | Confirmation of a meeting at Park Wards to resolve difficulties with car 20-G-4. | ||
| View original record | HS. FROM DA/EV. LID CROMWELL See me HS DA/EV3/W28.11.31. x5992 Copy to HN. This is to confirm that I shall be going to Park Wards on Wednesday next, the 2nd. Dec., after lunch, and that someone from… | ||
| img135 | Modifications to the headlamps for the 20/25 chassis, including extra cabling and taller lamp brackets. | ||
| View original record | P.T. FROM DA/EV. C. to MESSRS. WGR. CR. ES. HN. DA/EV5/M28.11.31. RECEIVED 30 NOV 1931 X5800 20/25. HEADLAMPS. With reference to BY/CGH11/G241131., we suggest that the additional cable in each conduit… | ||
| img136 | Use of P.80 lamps with taller brackets to alter the appearance of headlamps to match the 40/50 model. | ||
| View original record | HS. FROM DA/EV. RECEIVED 3 DEC 1931 LIDORIGINAL DA/EV6/W28.11.31. X5800. 20-G-4. HEADLAMPS. We are sending you a pair of P.80. lamps with Lucas/Graves dippers. We would like these to be used on taller… | ||
| img137 | Advocating for the expedited trial of a promising cylinder construction design, designated 'J. 3.'. | ||
| View original record | (COPY) FROM R. HS. ) [Text crossed out] ORIGINAL AERO ENGINES. R1/W30.11.21. X3866 The cyl. construction as J. 3. has such great promise - i.e. (1) weight, (2) simplicity, (3) cost, (4) distortion,… | ||
| img138 | Request for forged solid flanges on drawn tubes, including a request for samples. | ||
| View original record | H. FROM R. C. to [redacted] HS. [redacted] CAR WORK. CROSS WORKS. X5380 I shall be greatly pleased if flanges (thickened) can be forged solid on drawn tubes suitable for the above. I always wished for… | ||
| img139 | Solution for the diamond mounting of road wheel shock dampers. | ||
| View original record | LES FROM E. C. to BM. WOR. HS. P. 2. DIAMOND MOUNTING. EL/B/30.11.31. X7005. Referring to RR. Sch. 138. we fear to decrease further the flexibility on which the dampers rely to maintain their bedding,… | ||
| img140 | Single versus double hole eccentric plug adjusters on twin carburetters. | ||
| View original record | HS/Rel. FROM E. Copy to BY ORIGINAL E3/430. 30.11.31. x7080 re. P. 2. TWIN CARBURETTERS. We have never shewn a single hole eccentric plug adjuster on the above carburetter. Our last design LeC. 2905.… | ||
| img141 | Design layout and clearances for the rear end of car model J.3. | ||
| View original record | ORIGINAL TO [REDACTED] FROM DA/EV. SECRET DA/EV.I/30.II.3I. COPY TO [REDACTED] HS. x5700. x5380. RE REAR END OF CAR. J.3. You will have already received from us the full-sized schemes of the petrol… | ||
| img142 | J.3. Brake Linkage, referencing a scheme and proposing slight modifications. | ||
| View original record | P/. FROM D.A. C. to HS. ORIGINAL DA3/11.12.71. J. 3. BRAKE LINKAGE. x5360. We send herewith N. schs. 3379/80, showing the brake linkage to the rear brakes. It will be seen that though many of the… | ||
| img143 | Lubrication schedule and drawing for a Synchro Mesh Gearbox. | ||
| View original record | H. FROM I.A. C. to H.S. P. 2. SYNCHRO MESH GEARBOX. I.A./H/11.12.31. X7310 [STAMP: RECEIVED 12 DEC 1931 F. OF X.XII] Herewith we send A. sch. 3383. - Lubrication of Reverse Shaft - as promised. We… | ||
| img144 | Permanent lubrication scheme for the J.3 gearbox, comparing two modification proposals. | ||
| View original record | PY. FROM D.A. C. to SC. HS. J.3. GEARBOX. DA5/W.1.12.31. X5310. Herewith we send N. sch. 3384. This is the permanent sch. for the lubrication of the 25HP. gearbox, replacing the temporary sch. shewn… | ||
| img145 | Improvements to the gas and inlet bends for the J.3. cylinder head. | ||
| View original record | FROM E. C. to HS. El/W2.12.31. X 5050. J. 3. CYLINDER HEAD. We send you herewith a print of LeC. 2900. showing improvements to the gas bends on the above. From an inspection of the actual head brought… | ||
| img146 | Further development in the lubrication method for the reverse shaft on all synchro mesh gearboxes. | ||
| View original record | B. (crossed out) FROM DA. C. to HS. (crossed out) LUBRICATION OF REVERSE. ALL SYNCHRO MESH GEARBOXES. DA1/W2.22.12.31. X5310. Y7310. Herewith we send N. sch 3305. shewing a further development of the… | ||
| img147 | Proposed modifications to the bonnet length of the 25 HP model. | ||
| View original record | FROM DA/EV. LIP See me DA/EV1/M3.12.31. C.c to [REDACTED] HS. 25HP. LONGER BONNETS. X5260. This is to confirm our conversation of yesterday re. the above, when discussing the print of W. sch. 3381… | ||
| img148 | Arrangements for collecting an unfinished and unregistered car body from Park Wards. | ||
| View original record | HS. FROM DA/EV. ORIGINAL DA/EV/5/W3.12.31. s-34 Copy to SC. 20-G-4. x 5820 As far as we can see this body will be ready on Monday next. It is actually promised for the morning but you will be lucky to… | ||
| img149 | Design and implementation of the 25HP battery box suspension. | ||
| View original record | HS. FROM DA/EV. DA/EV/3/23.12.31. [Stamp: RECEIVED 24 DEC 1931] Copy to PY [text struck through] 25HP. - BATTERY BOX SUSPENSION. Y5335 As we promised HS/LID. yesterday we are writing to confirm that… | ||
| img150 | Proposing a new 'B' Sports engine, drawing comparisons to Alfa Romeo and Peregrine engines. | ||
| View original record | WOR. ) FROM R. HS. ) C. to SG. RG. [crossed out] G. to DF. C. [crossed out] 'B' SPORTS. Y4583. E. and I have schemed a smaller and improved G. 1. which is practically the same as the Alfa Romeo. If… | ||
| img151 | Driving seat positions, steering columns, pedals, and levers for J.3. | ||
| View original record | TO [redacted] FROM DA/EV. SECRET. DA/EVI/5.12.31. x 5770. COPY TO [redacted] HS. DRIVING SEAT POSITIONS. J.3. We send herewith N.Sch.3387. shewing the driving seat positions for J.3. COLUMN AND SEATS.… | ||
| img152 | Modifications to the side levers for the 25.HP Synchromesh Gearbox. | ||
| View original record | ORIGINAL SECRET. TO [REDACTED] FROM DA/EV. COPY TO [REDACTED] HS. SIDE LEVERS. SYNCHROMESH GEARBOX / 25.HP. We have previously sent you a scheme showing the modifications which seem necessary to the… | ||
| img153 | Sending the original drawing LeC. 2930, showing improvements to the exhaust and inlet gas bends of Japan 3. | ||
| View original record | ORIGINAL. PT. FROM E. E1/W7.12.31. C. to Mr. HS. J. 3. CYLINDER HEAD. X5050. We send you herewith the original of LeC. 2930., shewing improvements to both exhaust and inlet gas bends of Japan 3. L. | ||
| img154 | Design of a compression ignition engine, including cylinder, piston, and injection methods. | ||
| View original record | C. to R. C. to EB. for info C. to HS. BX. COMPRESSION IGNITION. X4483 With regard to the compression ignition programme I like the idea of making a cylinder of improved volumetric efficiency but do… | ||
| img155 | The sending of N. scheme 33W general arrangement, requesting blueprints and confirmation on printing options. | ||
| View original record | EH. FROM DA. C. to S/. HS. J. 3. GENERAL ARRANG'MENT. DAL/MS.12.31. X5770. Herewith we send N. scheme 33W. - General Arrangement of J. 3. as far as we have yet gone. Would you please send us 3… | ||
| img156 | P.2. Synchro Mesh Gearbox, including a modified top cover, servo damper placement, and a backing light switch. | ||
| View original record | GX PT. FROM DA. C. to SC. HS. P. 2. SYNCHRO MESH GEARBOX. DA2/M8.12.31. X7310. Herewith we send N. sch. 3389. - Clutch Pit and Servo Damper in connection with the above gearbox. It will be noticed… | ||
| img157 | Forwarding information about the controls and induction pipe for the P.2 Continental Expanding Carburettor. | ||
| View original record | FROM E. C. to S/W.D. HS. re. P. 2. CONTINENTAL EXPANDING CARBURETTOR. El/W9.12.31. X7120. We send you herewith LeCs. 2981/82, showing the remaining information in connection with the controls and… | ||
| img158 | Proposal for creating a luggage platform over the irregular floor and seat boards in vehicle 20-G-4. | ||
| View original record | HS. FROM DA/EV. ORIGINAL DA/EV1/M9.12.31. x599? 20-G-4. FOR Le CANADEL. In order to enable R. to get as much luggage as possible into the back of 20-G-4. we suggest a platform be made over the… | ||
| img159 | Use of oil-less bushes for spring shackles on the Peregrine project. | ||
| View original record | HS. ) FROM DA/EV. [Struck through text: DW. )] [Struck through text: Copy to HS.] OIL-LESS BUSHES. DA/EV2/49.12.31. [Handwritten: Y4.33.] In view of R's suggestion that we use oil-less bushes for the… | ||
| img160 | Modifications to the J.3. exhaust swan neck pipe routing. | ||
| View original record | P.T. FROM DA/EV. DA/EV3/M9.12.31. Copy to - HS. J. 3. EXHAUST SWAN NECK. X5230 You will have discovered no doubt that the exhaust swan neck pipe as drawn on N. scheme 3382. in plan will not do, as in… | ||
| img161 | Requesting a report on schemes for steadying side wheel carriers on P.2 and 25HP models. | ||
| View original record | HS. FROM DA/EV. LES See me DA/EV1/M10.12.31. G. to SG. CX. BY. SIDE WHEEL CARRIERS. HS x7600 x5600 x7260 x5260 We are anxious to receive a report from you re. the schemes you have tested for steadying… | ||
| img162 | The positioning of the brake equaliser crossmember and its effect on passenger footwell space. | ||
| View original record | P. FROM DA/EV. COPY OF ORIGINAL DA/EV2/410.12.31. C. to SG. US. WM. re. BRAKE EQUALISER CROSSMEMBER. 25HP. '101' ONWARDS IN 'T' SERIES. Y5830. The question of the new backward position of this cross-… | ||
| img163 | Possibility of dispensing with a filter in Delco hydraulic shock dampers. | ||
| View original record | HS. FROM DA. DA2/Wll.12.31. K2385 HYDRAULIC SHOCK DAMPERS. You will remember that when discussing the Delco shock damper you commented upon the absence of a filter between the reservoir and the… | ||
| img164 | Enquiry about front shock dampers located outside the frame. | ||
| View original record | ES/RM. FROM DA. ORIGINAL DA3/W11.12.31. K7520. P. 2. FRONT SHOCK DAMPER OUTSIDE FRAME. With reference to your enquiry over the telephone re. front shock dampers outside the frame on P. 2., we have… | ||
| img165 | Design and implications of a longer bonnet for the P2 model. | ||
| View original record | TO [REDACTED] FROM EV. EVI/12.12.31. COPY TO [REDACTED] IS. [REDACTED] LONGER BONNET. P2. x7-60, We send herewith N.Sch.3392. shewing a bonnet for P2. which is 6.000 ins. longer than standard. This is… | ||
| img166 | Requesting arrangements for a Special Touring Saloon car (20.G.4) to be photographed in London. | ||
| View original record | TO HS. FROM EV. EV2/18.12.31. X5130 COPY-TO [REDACTED] RE SPECIAL TOURING SALOON. 20.G.4. We hope that you will be able to arrange for the above car to call at Sales on its way to W.W. as it is… | ||
| img167 | The change gear lever and speedometer drive, requesting an investigation into its lubrication. | ||
| View original record | DY. FROM DA. C. to HS. P. 2. CHANGE GEAR LEVER, SPEEDOMETER DRIVE, ETC. DAL/H.12.31. X7310. We despatched to you last night R. sch. 3386. shewing the change gear lever, speedometer drive, etc, on… | ||
| img168 | The lengthening of the gear lever and repositioning of the brake lever for the P.2 synchromesh gearbox. | ||
| View original record | FROM. DA/EV. C. to W. R. MS. P. 2. SYNCHRO MESH GEARBOX. SIDE LEVER POSITIONS. DA/EV1/M14.12.31 X7310 We send herewith N. scheme 3391. showing the side lever positions for use with the synchro mesh… | ||
| img169 | From R. to Mr. H.S. discussing the qualities and issues of competitor vehicles, specifically Alfa Romeo and Lagonda. | ||
| View original record | S. FROM R. C. to MR. HS. ALFA ROMEO, LAGONDA, ETC. x483 Referring to SG9/B141231., I quite agree with you about the appearance, comfort, etc. I suggested the Alfa for technical reasons of design and… | ||
| img170 | Design of the radiator, bonnet, and dash for car model J.3. | ||
| View original record | Handwritten note (left margin): Re the copy we have. H. informed that all requested. TO HS. FROM EV. COPY TO HS (Handwritten: Hy. 24-1-32) RE RADIATOR, BONNET AND DASH. J.3. EVI/17.12.31. Handwritten:… | ||
| img171 | Report regarding schemes for stiffening a side spare wheel carrier on a 25HP car. | ||
| View original record | A. FROM DA/EV. LES ORIGINAL S.J. Mills DA/EV1/MHB.12.31. Copy to - HS. 25HP. 10,000 MILE CAR - 18-G-4. x 5630 With reference to GWH's report as to the side spare wheel carrier we have never had a… | ||
| img172 | Test ride report detailing issues with a sunshine roof, incorrectly fitted levers, a dangerous mirror, and the rear numberplate suspension. | ||
| View original record | HS. FMO: DA/EV. DA/EV5/M18.12.31. 20 - G - 4. V5120 We had our first opportunity of riding in this car on the 16th. inst. (1) There was a peculiar roar emitted from the eddy free front when the… | ||
| img173 | Comparative cost and design of a hub, considering an in-house design versus a Dunlop alternative. | ||
| View original record | (2) 4" long. On the one designed by us the expense of a gate would be obviated as there is no spigot. We think that the charge of £8. odd quoted by Derby for our design is abnormally high when we can… | ||
| img174 | Sketch detailing a drip ledge gap causing noise and the position of gear levers. | ||
| View original record | GAP CAUSING NOISE DRIP LEDGE AT "A" CL OF CAR 17.750 10° 17.25 NEUTRAL 1st & REVERSE See N.Sch. 3388 THE LEVERS NEVER GET IN THIS POSITION. GN NEVER CHANGES GEAR INTO THIRD WITH THE HAND BRAKE ON | ||
| img175 | The J.3. Crankshaft Damper and associated crankcase modifications. | ||
| View original record | R. FROM E. [R. is struck through] C. to S.R. HS. [S.R. is struck through] J. 3. CRANKSHAFT DAMPER. E1/M19.12.31. X634 We send you herewith LeC. 2977. - Crankshaft Damper, and LeC. 2985. -… | ||
| img176 | Experiments to improve the silence of the 25HP synchromesh gearbox helical trains. | ||
| View original record | COPY. FROM DA. C. to Mr HS. IUC. 25HP. SYNCHRO MESH GEARBOX. DA1/419.12.31. X5310. Herewith is N. sch. 3396. showing the following experiments, the object of which is to improve the silence of the… | ||
| img177 | Potential causes and solutions for the top gear working out on a 25 HP Synchro Mesh Gearbox. | ||
| View original record | HS. AHD. FROM DA/HDY. GRY RECEIVED DA/HDY1/M19.12.31. C. to - SG. WOR. C. to - E. BY. 25H.P. "SYNCHRO MESH GEARBOX. TOP GEAR WORKING OUT. X5310 (1) If this is due to mal-alignment of the 1st. and 3rd.… | ||
| img178 | List of nine improvements made to a battery ignition system in comparison to the Delco system. | ||
| View original record | ORIGINAL BS/WST.) FROM R. & E. C. CO - SO. WOK. BATTERY IGNITION. R1/W21.12.31. X6095/6 We have done the following to improve igniting on our earlier system, and Delco: (1) Adopted Delco double… | ||
| img179 | Fitting of a J. 3. crankshaft damper to a 20/25 HP engine for testing. | ||
| View original record | FROM E. GRY C. to S.R. HS. R. EL/WJL.12.12.31 x634 J. 3. CRANKSHAFT DAMPER. ADVANCE TEST ON A 20/25HP. ENGINE. We have looked into the question of fitting a J. 3. drum type damper to the 20/25, for… | ||
| img180 | J.3. Battery Ignition system, its components, and potential use on 'B' sports models. | ||
| View original record | FROM E. WSJ C. to Oerlikon. HS. J. 3. BATTERY IGNITION. X6095 We send you herewith a print of LeC. 2967. showing the above. The make and break levers shown together with the springs and contact points… | ||
| img181 | Experiments to prevent the top gear from disengaging on the 25.HP synchromesh gearbox. | ||
| View original record | TO [redacted] FROM DA. DA.I/ EV.21.12.41. COPY TO [redacted] HS. SYNCHROMESH GEARBOX. 25.HP. X5310 We send herewith N.Sch. 3397. showing further experiments to prevent the top gear coming out.… | ||
| img182 | Modifications to side wheel carriers to accommodate standardized longer bonnets on P.2 and 25HP models. | ||
| View original record | TO HS. FROM EV. ORIGINAL COPY TO SIDE WHEEL CARRIERS. We take it that with the introduction of diamond engine mounting on both P.2. & the 25.HP. the side wheel carrier will be steadied by a stay from… | ||
| img183 | Record of a telephone conversation regarding the electrical systems for the Japan III and Peregrine chassis. | ||
| View original record | c. Hs. of Dr/CC. BY.3/G21.12.31. X6091 X6134 X6005 RECORD OF TELEPHONE CONVERSATION WITH WW. - 11.12.31. RE JAPAN 111 AND PEREGRINE - ELECTRICAL SYSTEM. STARTER MOTORS. It was agreed that we should… | ||
| img184 | Request to carry out work and submit designs for consideration. | ||
| View original record | - 2 - E. wishes us to do what work we can in connection with this, and submit the designs to EW. for consideration. BY. By | ||
| img185 | Sending schedule N.Sch.3395, outlining the frame, springs, and transmission, comparing it to the Peregrine and noting uncertainty about spring flexibility. | ||
| View original record | SECRET. ORIGINAL. TO [REDACTED] FROM DA/EV. DA/EV.3/21.12.31. XJ553 COPY TO [REDACTED] HS. FRAME, TRANSMISSION LINE, ETC. B.2. We send herewith N.Sch.3395, showing the outline of the frame, front and… | ||
| img186 | Request for cut up sections of a J.3 cylinder head, with a handwritten note detailing the status of pattern alterations. | ||
| View original record | [Crossed out: HS/WH] E. RHC ORIGINAL Copy to Co. J. 3. CYL. HEAD. We should be glad to know when you will be able to send us the cut up sections of J. 3. cylinder head. x5050 Handwritten Note: H.S. We… | ||
| img187 | New scheme for flattened steering column controls and a headlamp dipping switch for the P.2 & J.3 models. | ||
| View original record | FROM DA. ORIGINAL. LAL/W23.12.31. X7240 X5240 C. to HS. P. 2. & J. 3. STEERING COLUMN CONTROLS. We send herewith N. scheme 3394. shewing the latest form of flattened controls for the above, including… | ||
| img188 | Adoption of Delco-Remy battery ignition components and their high-speed reliability. | ||
| View original record | HS. FROM E. WST C. to SG. WGW J. 3. BATTERY IGNITION. X6095 In reply to HS/WST6/KT141231., we are adopting the same form of HT. connection as used on the Delco-Remy coil. This increases the outside… | ||
| img189 | Cover note for document LeC. 2967, which deals with J. F. Battery Ignition. | ||
| View original record | A./ FROM E. C. to EDR-WOHR HS. ORIGINAL. ER/V23.12.31. J. F. BATTERY IGNITION. 46095 Please find herewith original of LeC. 2967. dealing with the above. E. | ||
| img190 | Alternative design for a crankshaft drum damper using rubber blocks. | ||
| View original record | FROM E. C. to SG. WOH. HS. J. 3. ALTERNATIVE CRANKSHAFT DAMPER. ES/M/23.12.31. x634. We send you herewith LeC. 2978. shewing an alternative design of drum damper in which the masses do not slip round… | ||
| img191 | Cover memo for a preliminary specification for B.2, noting its shared features with the Peregrine. | ||
| View original record | CONFIDENTIAL SO ) FROM E. OR. ) C. to HS. SM. B. 2. SPECIFICATION. E6/M23.12.31. Y4553. Y4027. Please find attached copy of preliminary specification for B. 2. shewing features in common with… | ||
| img192 | Comparative table of components for Peregrine and Bentley models, detailing shared and specific parts. | ||
| View original record | SECTION COMMON TO BOTH PEREGRINE AND BENTLEY SPECIFICATION F PEREGRINE SPECIAL TO BENTLEY ENGINE Crankshaft, con rods, and pistons, valves, springs, fittings & guides. Water and oil pumps, oil relief… | ||
| img193 | Specification comparison sheet for various car parts across Peregrine and Bentley models. | ||
| View original record | SECTION | COMMON TO BOTH PEREGRINE AND BENTLEY | SPECIFICATION OF PEREGRINE | SPECIAL TO BENTLEY BONNET. | Louvres and fittings. | Rivetless P. 2. fasteners. Flip flap shutters. | Bentley shape… | ||
| img194 | Comparison table of vehicle parts and systems for different specifications, namely Peregrine and Bentley. | ||
| View original record | SECTION. | COMMON TO BOTH PEREGRINE AND BENTLEY. | SPECIFICATION OF PEREGRINE.. | SPECIAL TO BENTLEY. INSTRUMENT BOARD. | All parts except speedometer. | Grouped system; bought out to our… | ||
| img195 | Carburetter options (RR vs SU) and development for the Continental Phantom programme. | ||
| View original record | SG. FROM E. C. to WR. H. HS. CONTINENTAL PHANTOM. EI/W28.12.31. X7120. Memo. HS1/AJ221231, raises a very important point in connection with the Continental Phantom programme. R. has said that we shall… | ||
| img196 | Layout of the floorboards, referencing schedule 3401 and the design of ribs in the footwell. | ||
| View original record | BY. FROM DA. ORIGINAL DAL/W31.12.31. C. to BG. HS. Br J. 3. FLOORBOARDS. X5500. Herewith we send N. sch. 3401 - layout of the floor-boards. We have followed previous practice as closely as possible as… | ||
| img197 | Schematic 3398 for the accelerator pedal, noting its similarity to the one on the Phantom. | ||
| View original record | A. FROM DA. C. to S. HS. J. 3. PEDALS. DA2/W31.12.31. X5470. Herewith we send sch. 3398. shewing the accelerator pedal. We have also indicated the other pedals though the scheming of these has been… | ||
| img198 | The J. 3. cross steering levers for use with 18' wheel rims. | ||
| View original record | FROM DA. C. to HS. J. 3. CROSS STEERING LEVERS WITH 18" WHEEL RIMS. X5430 With further reference to BY11/C41231., we send herewith N. sch. 3402. showing how we suggest the matter of the smaller wheels… | ||
| img199 | Experiments and the incorporation of a reduced size pin for the 25HP S. W. Gearbox. | ||
| View original record | DY.) FROM DA. HS.) G. to E. RHC. GRY DA5/W31.12.31. 25HP. S. W. GEARBOX. XS310. We presume that the experiments shewn on N. sch. 3396. are proceeding, and that we shall hear the results in due course.… | ||