Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Modifications and improvements to the engine cooling system, including shutters, radiator, and louvres. | ||
| View original record | HS. FROM R. P. 2. COOLING. x766. x7250. x1085. x7260. We were very pleased to see that some of the features we have suggested have been made, and appear a distinct advance. (1) We like very much the… | ||
| Scan002 | Various schemes and problems related to gearbox design. | ||
| View original record | FROM R. GEARBOX PROBLEM. Referring to the situation at the moment, we have in the hands of Derby the helical sideshaft and 3rd. gear controlled by jaw clutches, which can be modified to the Maybach… | ||
| Scan003 | Comparison and critique of various gearbox designs, including epicyclic, Wilson, Salerni, and spool gears. | ||
| View original record | (2) little too elaborate and complicated for profitable production- (some of No. 3. has gone to Derby.) This 4th. scheme consists of the same epicyclic accelerated train and reverse as No. 2., but the… | ||
| Scan004 | Confidential memo discussing car body booming issues, the potential of all-steel bodies, and comparisons to American manufacturers. | ||
| View original record | SG. FROM R. C. to LBC. WOR. C. to C. PY. C. to HS. DH. ORIGINAL. CONFIDENTIAL. re. BODIES. R5/W1.10.30. xV.6.30. x7.8.30. x5.8.30. You will remember that for many months and years I have been very… | ||
| Scan005 | Confidential memo detailing solutions for crankshaft vibration in the 25HP engine at high speed. | ||
| View original record | HS. FROM R. [Text struck through] Copy to SG Copy to WOR. Copy to BY. Copy to E. Copy to C. [End of struck-through text] CONFIDENTIAL. 25HP. CRANKSHAFT VIBRATION IN APPROACHING 70MPH. [Stamped across… | ||
| Scan006 | Conference report outlining the accuracy limits and specifications for a vehicle subframe. | ||
| View original record | ST. FROM DA/EV. C. to WOR. C. DFT. C. to SG. HS. EP. JLE. re. SUBFRAME - P.2. DA/EV1/M2.10.30. x7580 This is a report of the conference held at Park Ward's between BY/CGH, EP, JLE, EV, and a Works… | ||
| Scan007 | Specifications and procedures for chassis, subframe, and body assembly. | ||
| View original record | (2) (7) We must put on the chassis print a definite dimension from the under side of the subframe to the under side of the body back rail, thus - [Diagram with dimension .500 +/- .150] which will give… | ||
| Scan008 | Suitability of French Marchel headlamps over Lucas lamps, in light of a new French law. | ||
| View original record | Ch. (crossed out) FROM DA/EV. C. to G. (crossed out) W/R. (crossed out) HS. @38/30 (handwritten) ORIGINAL (stamped) re. HEADLAMPS. DA/EV3/M2.10.30. X1357 X5800 X7800 Re. your CX2/KW30930., and my… | ||
| Scan009 | Outlining the objectives and current status of various vehicle improvements. | ||
| View original record | HS. FROM DA. & R. Copy to - SG. WOR. ORIGINAL DA3/M22.10.30. EXPERIMENTAL REPORTS. There are some experiments of which we have not heard much recently, and of which we should like to know the state:-… | ||
| Scan010 | Visit to the Pressed Steel Body Co. to investigate three different types of all-steel body construction. | ||
| View original record | S.G. FROM DA/EV. C. to MOR. LTD. C. to MR. HS. C. to MR. FOR. ENG. ORIGINAL DA/EV1/W4.10.30. x4685 ALL-STEEL BODIES. Away back in the summer we visited the Works of the Pressed Steel Body Co. (Gt.… | ||
| Scan011 | Investigation into all-steel car bodies, specifically the Budd system, for potential use on the 25HP model. | ||
| View original record | (2) bodies fitted to the larger American cars although it is a system which is rapidly having to give place to the Budd. The Chrysler and Cadillac bodies are composite bodies. After our 1st. visit… | ||
| Scan012 | Modifications to the 'C' steering system to improve body space and comfort. | ||
| View original record | SG. FROM DA/EV. C. to HS. BY. CX. 'C' STEERING - P. 2. ORIGINAL We have always criticised C. steering P. 2. on the grounds that the wheel projects very much above the waist line of the body. The value… | ||
| Scan013 | Alternative layouts for the N. 2 Series instrument board on different chassis types. | ||
| View original record | S.A. ORIGINAL 83/1330 A. FROM DA/EV. C. to SG C. to CX C. to - HS. INSTRUMENT BOARD - N. 2. SERIES. DA/EV1/M10.10.30. x)530 With reference to BY/CGH8/G81030., and the arrangement of the instrument… | ||
| Scan014 | Modifications to the scuttle of a body to fit a revised radiator and bonnet on a Phantom II. | ||
| View original record | HS. FROM DA/EV. Copy to BY. (BS/1310) ORIGINAL 18-G-4. DA/EV2/M10.10.30. x5770 x5260 BY. has informed us that you cannot fit the latest modifications to the revised radiator and bonnet on this car… | ||
| Scan015 | Cover memo for an enclosed print showing the 25HP clutch. | ||
| View original record | PT. FROM E. Copy to HS. ORIGINAL 25HP. CLUTCH. E1/M11.10.30. x5480, Enclosed is a print of LeC. 2831., shewing the above. E. | ||
| Scan016 | The construction of a specimen 3rd speed epicyclic train for testing a revised gearbox. | ||
| View original record | P/Y. FROM DA. C. to - SG. [Text is struck through] C. to - RS. 11 DA1/WW/14.10.30. x 7310. x 5310. x 523. (9 1/2 13 10/30) GEARBOXES - EPICYCLIC ORIGINAL Herewith we send N. sch. 3149. shewing the… | ||
| Scan017 | Requesting a progress update on experiments related to pedal stems and bonnets. | ||
| View original record | HS. FROM DA/EV. DA/EV3/M11.10.30. ORIGINAL. filed. - {x7470 x5260 x7260} We would be glad if you could tell us the state of progress of the following experiments: (1) Adjustable pedal stems - P.2. -… | ||
| Scan018 | Proposal for a new louvred bonnet design, scheme 3153, with improvements over the 14-EX model. | ||
| View original record | [Crossed out: EH.] FROM DA. [Crossed out: Copy to EH.] Copy to HS. [Circled handwritten note: 92/13 30] ORIGINAL. DA2/M11.10.30. [Handwritten: X7260.] P. 2. LOUVRED BONNET. We send herewith N. scheme… | ||
| Scan019 | Instructions to stop the 25HP flywheel job and modify the bonnet louvres. | ||
| View original record | HS. FROM R. (8 1/2) 13 10/30 ORIGINAL R1/M11.10.30. x634. x5360. x7260. Kindly note the following:- (1) The 25HP. flywheel and clutch job should be stopped. (2) The horizontal louvres on the bonnet… | ||
| Scan020 | Short memo regarding sending drawings (LeCs. 2830/1) for the 25HP Clutch. | ||
| View original record | ~~PY~~. FROM E. C. to ~~SC~~. HS. 25HP. CLUTCH. Herewith we send LeCs. 2830/1., shewing above. E. J 14/30 ORIGINAL E2/W13.10.30. x 5480. | ||
| Scan021 | Revised epicyclic 3rd speed gearbox and associated drawings. | ||
| View original record | FROM DA. Copy to -HS. REVISED EPICYCLIC 3rd. SPEED GEARBOX. This is to confirm having sent you on Saturday N. sch. 3155. a drawing of the gears in the three speed part of the above box, the object… | ||
| Scan022 | Improvements to radiators and bonnets, including square tubes, overflow valves, and bonnet vents. | ||
| View original record | HS. ) FROM R. BY. ) [Struck through] Copy to SG. Copy to WOR. [Struck through] E, Da, Er [Handwritten and struck through] RADIATORS & BONNETS. SQUARE TUBES, OVERFLOW VALVE, & BONNET VENT. X7250 X5250… | ||
| Scan023 | Schemes for a revised epicyclic 3rd speed gearbox. | ||
| View original record | Y. FROM DA. to S/C. HS REVISED EPICYCLIC 3rd. SPEED GEARBOX. ORIGINAL X523 X5310 X7310 We send herewith N. schemes 3150/51/.., shewing particulars of the casing of this gearbox. The gearbox is joined… | ||
| Scan024 | Modification to the P.2. Bonnet side panel to create a continuous body line, addressing criticisms from Sales and coachbuilders. | ||
| View original record | PY. FROM DA/EV. C. to S. HS. re. P. 2. BONNET. ORIGINAL x7260 x7830 With the change in coachwork fashions Sales and coach-builders have frequently criticised the fact that our bonnet stops at the… | ||
| Scan025 | Confidential memo on Motor Show impressions, discussing design costs, manufacturing efficiency, and supplier quality. | ||
| View original record | SC. LHS. WOR. ) FROM R. LORD WARGRAVE. ) Mr. CLAREMONT. ) CONFIDENTIAL. ORIGINAL R4/M20.10.30. X631 X777 X579 C. to HS. BY. E. DA. MOTOR SHOW IMPRESSIONS. My impressions of the Motor Show are that we… | ||
| Scan026 | Engine performance, future design considerations including a 12-cylinder engine, and proposals for future car models. | ||
| View original record | (2) ORIGINAL. It must be realised that we have recently considerably increased the energy, vigour, and number of revs. of both our car engines which have brought about at high speeds conditions which… | ||
| Scan027 | Engine mounting options, superchargers, gearboxes, and the 25HP model. | ||
| View original record | (3) We are still hoping to do something with the engine mounting and other improvements for the immediate future, and it will be understood that we can choose between high compression and low, which… | ||
| Scan028 | Reduction of flywheel vibration on a 25HP engine. | ||
| View original record | HS. FROM R. Copy to SG. " WOR. " BY. R1/M20.10.30. RECEIVED 22 OCT 1930 H ORIGINAL Y634 X5300 25HP. FLYWHEEL VIBRATION. We have concluded that this vibration will not vary directly with the overhang,… | ||
| Scan029 | Cost-saving measures by discontinuing part number stamping and simplifying drawing dimensions. | ||
| View original record | A. FROM R. Copy to SQ. " WOR. " HS. " CPY. R1/M23.10.30. ORIGINAL. X177 PRODUCTION PARTS. The majority of our standard car parts are stamped or etched with their part numbers of six figures. With a… | ||
| Scan030 | Modifications to the wheels of the Phantom II. | ||
| View original record | TO HS/RM. FROM DA/EV. EV2/24.10.30. ORIGINAL x7810 x7830 x7380 RE PHANTOM II. WHEELS. We thank you for your Hs/Rm4/MJ.21.10.30. I was given to understand that you were anxious to have wheels at the… | ||
| Scan031 | Scheme 3157 for vacuum control and operation of top and 3rd gear jaw clutches, which supersedes scheme 3151. | ||
| View original record | DY. FROM DA. C. to SG. HS. DA2/M25.10.30. ORIGINAL Herewith we send N. Scheme 3157. - Vacuum Control and Operation for the Top and 3rd. Gear Jaw Clutches. It will be seen that the arrangement is… | ||
| Scan032 | Criticisms and potential improvements for bonnets and radiators. | ||
| View original record | TO HS. FROM EV. COPY TO W. E. BONNETS. ETC. We have received various criticisms of our bonnets and radiators. This memo is an attempt to summarise the situation as we see it so that if possible HS.… | ||
| Scan033 | Design elements including the crankcase oil filler cap, mascot, and bonnet louvres. | ||
| View original record | (2) EVI/25.10.30. cont. It would be possible for one to use a bayonet type of cap as used on the crankcase oil filler if it were not for the great mass of our mascot with its high centre of gravity.… | ||
| Scan034 | Revised drawing for an epicyclic third speed gearbox, noting a design change and a delay with previous prints. | ||
| View original record | B/. FROM DA. C. to S/. HS. EPICYCLIC THIRD SPEED GEARBOX REVISED. ORIGINAL DA1/W25.10.30. x523. x7310. x5310. Herewith we send N. sch. 3156. shewing the actuation of the gears in the three speed box.… | ||
| Scan035 | Instrument board layout for 'C' and 'D' type steering. | ||
| View original record | 1. FROM DA/EV. Copy to - CG. [crossed out] " CX. [crossed out] " HS. P. 2. INSTRUMENT BOARD. N. 2. SERIES. ORIGINAL. x7530. x7430. We thank you for BY/CGH12/G231030, and also for the picture layout of… | ||
| Scan036 | Thermostat modifications and their effect on engine performance and petrol consumption. | ||
| View original record | HS. FROM R. ORIGINAL R1/M27.10.30. Copy to SG. [Strikethrough] " WOR. " BY. " EP. THERMOSTATS. x3499, Referring to HS/RM1/AD221030., personally I think it would be doing quite wrong to adopt… | ||
| Scan037 | Log of temperature readings from a 25EX thermostat test. | ||
| View original record | Thermostat Test. 25EX Thermostat Air Temp. 12° Half mile readings @ 30 MPH with starting temperature 63°. 63° 63.5° 63.5° 64.5° 65° 65° 65° As above with starting temp. 68.5° 68.5° 67.5° 66.5° 66.5°… | ||
| Scan038 | Test results for a 24 EX thermostat, including temperature readings and radiator shutter operation points. | ||
| View original record | Thermostat Test with 24 EX Thermostat Air Temp. 11.5° Half mile reading at 30 MPH with starting temp 64.5°. 67.5° 67.5° 68° 69° 69.5° 69.5° 69.5° B Maximum temp reached under ordinary driving… | ||
| Scan039 | Test report for a thermostat marked 'A', with temperature readings and radiator shutter operation points. | ||
| View original record | Thermostat Test with Thermostat marked "A" Air Temp. 13° Half mile readings @ 30 MPH with starting temperature 62.5°. 62.5° 62.5° 63.5° 64° 65° 65° 65° 65° 65° Maximum temperature reached under… | ||
| Scan040 | Operating temperatures for the 25EX Thermostat. | ||
| View original record | 25EX Thermostat STARTS TO OPEN @ 50° FULLY OPEN @ 61° STARTS TO CLOSE @ 58° FULLY CLOSED. @ 48° Gard Lyman. 21-10-30 | ||
| Scan041 | Hand-drawn sketch of a tube/pipe cross-section with a circled feature, alongside handwritten valve timing notes. | ||
| View original record | The text is written upside-down on the document. 32 EX Camshaft STARTS TO OPEN @ 20° FULLY OPEN @ 61° STARTS TO CLOSE AT 50° CLOSED AT [illegible] | ||
| Scan042 | Acceleration test results for vehicle 19EX at water temperatures of 60°C and 70°C. | ||
| View original record | RM: Acceleration Tests on 19EX. At water temp of 60°C. 10-30 MPH | 5.16 secs. 20-30 . | 5. . 30-40 . | 5.05 . 40-50 . | 5.95 . average taken both ways. At Water Temp of 70°C 10-30 MPH | 4.95 secs.… | ||
| Scan043 | Modification to the jaw clutches in the revised epicyclic third speed gearbox. | ||
| View original record | P/. FROM DA. Copy to SG. [Struck through] Copy to ES. EPICYCLIC THIRD SPEED GEARBOX [Stamped: RECEIVED 30 OCT 1930] [Stamped: ORIGINAL] x7310. x5310. x523. Herewith we send N. sch 3158 shewing a… | ||
| Scan044 | Specifications for a 'Car for R', covering body track, bonnet, chassis, lamps, and delivery schedule for France. | ||
| View original record | FROM DA. Copy to - HS. CAR FOR R. ORIGINAL x 8992 Replying to BY/CGH9/W231030:- As regards paragraph "body" we want the 60" track, and the body will be built to suit. This also answers the query re.… | ||
| Scan045 | Superseded internal memo indicated by a 'RECEIVED' stamp and handwritten notes. | ||
| View original record | [Stamped Text] H RECEIVED 31 OCT 1930 ORIGINAL [Handwritten Text] Rm This has been replaced by [Illegible Signature] on 1-11-30 [Typed Text] [The main body of typed text is illegible as it appears to… | ||
| Scan046 | Modification to the 1st speed dogs for the all-epicyclic gearbox, scheme 3159. | ||
| View original record | EY. FROM DA. Copy to SC. Copy to HS. DA2/M29.10.30. ORIGINAL x 573. x 7 3/10. x s-3 10 ALL-EPICYCLIC GEARBOX. Herewith we send N. scheme 3159., shewing a modification to the 1st. speed dogs for the… | ||
| Scan047 | New untarnishable metal called 'Silveroid' for body fittings, noting its use by Crossley's. | ||
| View original record | EY. FROM DA/EV. Copy to - SG. Copy to - HS. "SILVEROID" We have just come across this untarnishable metal in connection with body fittings, and wondered whether it would interest you. Perhaps you have… | ||
| Scan048 | Required design features for future 25HP models regarding axle, springing, engine mounting, and bodywork. | ||
| View original record | SG. FROM R. C. to ~~LHS. WOR.~~ C. to ~~C.~~ HS. C. to ~~CX.~~ PN. C. to ~~EF. E.~~ DA. R1/M29.10.30. ORIGINAL x5770 25HP. - 1931'CHINA' - 18-G.4 re. VISIT OF HS. RM. & ACL. TO WW. ON 28.10.30. For… | ||
| Scan049 | Vehicle ride characteristics, performance, and body design considerations. | ||
| View original record | (2) ORIGINAL For heaven's sake do not increase the height of the roof, or seats, because it makes springing more difficult, if not impossible, for low speed comfort and high speed stability. We have… | ||
| Scan050 | Proposal for a combined direct, electric, and mechanically geared change gear system. | ||
| View original record | X523 DA. ) FROM R. (DA. is crossed out) HS. ) BY. ) (BY. is crossed out) C. to = SGR. (crossed out) G. to PN. C. to Mr. CLAREMONT R2/M14.10.30. (DESPATCHED 30. 10. 30.) CHANGE GEAR - COMBINED DIRECT,… | ||
| Scan051 | List of required accessories and specifications for car 27-EX. | ||
| View original record | HS. ) FROM DA/EV. CX/HN. ) [Struck through] F. Dodd [Handwritten in red] Copy to BY. [BY is handwritten] 27-EX. - CAR FOR R. DA/EV1/M30.10.30. ORIGINAL [Stamped] x899> [Handwritten] We shall need the… | ||
| Scan052 | The revised Epicyclic 3rd speed gearbox and the experimental arrangement of its oil pump and lubrication jet. | ||
| View original record | BY. FROM DA. Copy to SG. Copy to HS. DA1/M31.10.30. ORIGINAL X7310. X5310. X523. EPICYCLIC 3rd. SPEED GEARBOX REVISED. Herewith we send a sch. 3161. shewing the arrangement of the oil pump and… | ||
| Scan053 | Modifications and specifications for the Epicyclic 3rd speed gearbox. | ||
| View original record | BY. FROM DA. Copy to SG. Copy to HS. EPICYCLIC 3rd. SPEED GEARBOX ORIGINAL DA1/M1.11.30. X7310. X5310. X523- Herewith we send N. sch. 3160. giving further particulars of the box, namely, the change… | ||
| Scan054 | Various novel gear changing mechanisms and transmission technologies. | ||
| View original record | EG. FROM R. (struck out) G. to WOR. BY. (struck out) C. to HS. TN. (struck out) C. to C. EF. (struck out) C. to PA. E. (struck out) R1/M3.11.30. ORIGINAL X523. X7310. X5310. X4510. X2061. CHANGE GEAR… | ||
| Scan055 | Evaluation of various gearbox and transmission schemes, including historical attempts and future plans. | ||
| View original record | (2) applied to a 3 speed box, which is not ideal for present driving conditions which ask for a fairly low top and high third. This gear change is not available to us and I should not recommend its… | ||
| Scan056 | The design of a new 4-speed gearbox, detailing its semi-silent, easy-change features. | ||
| View original record | (3) the design work this month. In the meantime Derby have many parts that they can proceed with. We finally came to the conclusion that to overcome certain difficulties of control and operation a 3… | ||
| Scan057 | Three schemes for the revision of the 25HP 'Japan' engine. | ||
| View original record | BY. FROM E. C. to SG. WOR. C. to HS. HY REVISION OF 25HP. ENGINE 'JAPAN'. RECEIVED 13 NOV 1930 ORIGINAL X5770 X5050 X5230. We send you herewith three schemes as follows dealing with the above:- LeC.… | ||
| Scan058 | Proposed re-arrangement of the 25HP frame, cross members, and brake gear per scheme 3162. | ||
| View original record | FROM DA. Copy to HS. 25HP. FRAME ETC. RECEIVED 1 NOV 1930 DA2/HS ORIGINAL x5370. x5380. We send herewith N. scheme 3162. shewing a re-arrangement of the cross members and brake gear etc to reduce, or… | ||
| Scan059 | Modifications and additions to a revised epicyclic third speed gearbox. | ||
| View original record | BT. FROM DA. Copy to SG. Copy to HS. ORIGINAL 14.11.30. x7310. x5310. x533. REVISED EPICYCLIC 3rd. SPEED GEARBOX. We send herewith N. sch. 3163. shewing some slight modifications and additions to the… | ||
| Scan060 | Letter to Park Ward & Co. detailing the final finish and interior specifications for Sir Henry Royce's car, 27EX. | ||
| View original record | x8997 ATTENTION OF MR. PARK. "ORIGINAL" WEST WITTERING. NR. CHICHESTER. SUSSEX. EVB/5.11.30. NOVEMBER 5TH. 1930. Messrs Park Ward & Co. Ltd., 473, High Road. Willesden. LONDON. N.W. Dear Sirs, RE SIR… | ||
| Scan061 | Car interior fittings and design specifications, including sketches. | ||
| View original record | FINISHERS AND INSTRUMENT BOARD. GREY WOOD if necessary tinted to match the hue of the headcloth. INTERIOR FITTINGS. Polished silver, inlaid with black. No ivory knobs. We hope that this information… | ||
| Scan062 | Chassis 27-EX for Sir Henry Royce, coordinating body mounting with Park Ward and component fitting. | ||
| View original record | HS/RM. FROM DA/EV. DA/EV2/M6.11.30. ORIGINAL X8992 re. 27-EX.- SIR HENRY ROYCE. _____________________________ We would like to let Park Ward have this chassis to do the mounting of the body. We could… | ||
| Scan063 | Revised epicyclic 3rd speed gearbox and the feasibility of fitting an 8.5' fabric coupling. | ||
| View original record | PY. FROM DA. (PY. is struck through) Copy to SG. (Struck through) Copy to HS. DA1/M7.11.30. ORIGINAL (Stamped and struck through) X3310. X5310. X5V3. EPICYCLIC 3rd. SPEED GEARBOX REVISED. Herewith we… | ||
| Scan064 | Revisions to the epicyclic 3rd speed gearbox and modifications to the servo and brake arrangements. | ||
| View original record | BX. FROM DA. Copy to SG. Copy to HS. EPICYCLIC 3rd. SPEED GEARBOX REVISED. We send herewith N. scheme 3152. - Plan View - N. scheme 3168. - Modifications to the servo and brake arrangements to suit… | ||
| Scan065 | From DA to HS requesting remarks on criticisms regarding reduced controls on the steering column. | ||
| View original record | HS. FROM DA. DA4/M7.11.30. [Handwritten annotation: ?430.? x5430] [Stamp: RECEIVED 10 NOV 1930] [Handwritten: HS] REDUCED CONTROLS ON STEERING COLUMN [Stamp: ORIGINAL] We understand from R. that you… | ||
| Scan066 | Alternatives for increasing body space on the Continental Touring Saloon Chassis. | ||
| View original record | PY. FROM DA/EV. Copy to - HS. " " SG. " " CX. re. CONTINENTAL TOURING SALOON CHASSIS. DA/EV3/17.11.30 ORIGINAL X7120. X7830. It is found that in some cases more room is asked for in the body than that… | ||
| Scan067 | Suggestion to improve the lubrication of the front shock damper's upper joint by fitting a bent pipe from the air vent. | ||
| View original record | RECEIVED 10 NOV 1938 FROM DA. DA6/M7.11.30. ORIGINAL X7520. P. 2. FRONT SHOCK DAMPERS. It is suggested that we should improve the lubrication of the upper joint by so directing the oil escaping… | ||
| Scan068 | Clearance for the P. 2. Scuttle N. 2. Series isolation scheme. | ||
| View original record | FROM DA/EV. Copy to - HS. P. 2. SCUTTLE N. 2. SERIES. ORIGINAL DA/EV2/M7.11.30. x4613 BY/CGH5/G11130. We thank you for the print of F.82854 and your memo. This print appears now to fulfil the… | ||
| Scan069 | Gearbox problem regarding a proposed electrical, magnetically coupled clutch system. | ||
| View original record | [Strikethrough: BY.] FROM DA. [Strikethrough: Copy to SG] Copy to HS. ORIGINAL DA/A7.11.30. x523. GEARBOX PROBLEM. Herewith we send N. scheme 3167. shewing the electrical change speed gear… | ||
| Scan070 | Outlining current engineering priorities for aero engines, the P.V. engine, and the 25HP model, alongside a decision against purchasing a Maybach. | ||
| View original record | SG. FROM R. C. to HS/RM. ENGINE WORK AT WW. RECEIVED 1930 NOV 13 We are at present concentrating on - (1) Getting the present aero engines right. (2) Production of the new P. V. engine. (3)… | ||
| Scan071 | Requesting permission to send chassis 27-EX to coachbuilder Park Ward for body mounting, discussing logistics and costs. | ||
| View original record | SG. FROM DA/EV. Copy to HS/RM. 27-EX. - FOR R. DA/EV2/M10.11.30. ORIGINAL We would like to know whether we have your permission to send 27-EX. chassis to Park Ward on the 26. Nov., to be there for a… | ||
| Scan072 | Proposal to increase the oil capacity of the 25HP crankchamber and redesign the oil gauge. | ||
| View original record | HS. ) FROM R. ORIGINAL R4/M10.11.30. CHASSIS WORK - 25HP. x5000 In redesigning the 25HP. crankchamber we find it needs to carry more oil in the crankchamber. The .750 gal. at present normal should at… | ||
| Scan073 | Sending a chassis to Park Ward, fitting a dual carburetter, and designing a petrol tank. | ||
| View original record | HS/RM. FROM DA/EV. ORIGINAL DA/EV3/M10.11.30. 27-EX. Y 899? You will see I have written to SG. about sending the chassis to Park Ward, and I think he will agree. We take it that although the dual… | ||
| Scan074 | Revisions to the Epicyclic 3rd speed gearbox, including sending new scheme drawings and noting component changes. | ||
| View original record | P/. FROM DA. C. to S/C. HS. ORIGINAL DA1/M11.11.30. X7310. X5310. X523. EPICYCLIC 3rd. SPEED GEARBOX. (REVISED.) Herewith we send N. sch. 3152. - Plan View of the above. It will be noticed that the… | ||
| Scan075 | From 'R' requesting to see the 25HP model before it is sent to France. | ||
| View original record | HS/RM. FROM R. ORIGINAL R1/M11.11.30. X5770. I should like to see the 25HP. before it goes to France, if this is at all possible. R. RECEIVED 30 NOV 13 | ||
| Scan076 | Shortening the oil pump for the epicyclic 3rd speed gearbox. | ||
| View original record | PY. FROM DA. C. to SG. HS. ORIGINAL DA2/M12.11.30. EPICYCLIC 3rd. SPEED GEARBOX (REVISED) - OIL PUMP. V7 310 x5-310 x523 further On looking/into the assembly of this box we think we should like to… | ||
| Scan077 | Destruction of batteries on the Continental Touring Saloon Chassis, questioning if the cantilever suspension is the cause. | ||
| View original record | FY. FROM DA. C. to - BC. " GK. " HS. ORIGINAL. DA1/M12.11.30. X7120 CONTINENTAL TOURING SALOON CHASSIS. Replying to BY9/G101130., it will be a very serious disappointment if we cannot have the… | ||
| Scan078 | Outlining the revised assembly procedure for an epicyclic 3rd speed gearbox. | ||
| View original record | FROM DA. Copy to HS. ORIGINAL EPICYCLIC 3rd. SPEED GEARBOX REVISED - ASSEMBLY. x7310. x5310 x525. We should like to give you an idea of how we propose to assemble this box so that Derby may bear it in… | ||
| Scan079 | Letter to Park Ward & Co. Ltd. concerning an experimental chassis with special features for Sir Henry Royce. | ||
| View original record | ORIGINAL COPY TO - HS/RM. COPY TO CX/HN. x 8992. XXXXXXX "EAMACHA" WEST WITTERING. CHICHESTER. 14. Nov. 1930. Messrs Park Ward & Co. Ltd. Dear Sirs, 27-EX. - SIR HENRY ROYCE. We thank you for your… | ||
| Scan080 | Inquiry about experiments with Maybach type clutches and helical 3rd speed, with a handwritten response. | ||
| View original record | HS. FROM DA. ORIGINAL DA3/W14.11.30. x2061. x2200. x35-31. We should be very interested to hear how the experiments with theMaybach type of clutches in conjunction with the helical 3rd. speed are… | ||
| Scan081 | New design for a sheet metal battery box for the 25HP chassis, including battery, box, and wiring. | ||
| View original record | FROM DA. C. to HS. 25HP. BATTERY AND BOX. We send herewith N. sch. 3169. shewing a design for a sheet metal battery box for the 25HP. chassis on the lines of that for P.2., with every effort to… | ||
| Scan082 | A special chassis being sent to Park Ward, detailing required modifications, feature secrecy, and a new tank design. | ||
| View original record | HS/RM. FROM DA/EV. ORIGINAL DA/EV1/M14.11.30. X899? 27-EX. You will note that SG. has agreed to our letting Park Ward have the chassis on certain terms which we think we can adhere to. special We… | ||
| Scan083 | Proposing 9' rear and 4' front spring deflection as a compromise for American requirements, noting concerns about excessive rolling. | ||
| View original record | HS/RM. FROM E. ORIGINAL. E2/M15.11.30. Copy to - SC L. H. P. 2. SPRINGING. x7410. x777. re. the above, R. proposes 9" rear, and 4" front deflection as the best compromise for American requirements. He… | ||
| Scan084 | Design and clearance of lower controls on a steering column, requesting a mock-up. | ||
| View original record | HS/RM. FROM DA. ORIGINAL DA2/M15.11.30. LOWER CONTROLS ON STEERING COLUMN. x7430. x5430. Thank you for HS/RM4/AD111130. Could you send us a steering wheel fitted up with the 'mock up' you refer to.… | ||
| Scan085 | Salerni coupling on the 40/50 model, its defects, and potential for further gearbox experiments. | ||
| View original record | HS. FROM DA. ORIGINAL. DA3/M15.11.30. X4510. SALERNI COUPLING ON 40/50. Though we have abandoned the Salerni coupling we think it will be possible to make use of it to confirm one or two points on our… | ||
| Scan086 | Note on ensuring no load on the clutch rod when the coupling is engaged to prevent slippage. | ||
| View original record | (2) (3) When the coupling is engaged there should be no load at all in the rod to the clutch, and so there should be no tendency for the clutch to slip due to this rod. DA. | ||
| Scan087 | Confidential memo discussing the evolution and increased duty required of car shock dampers. | ||
| View original record | SG. PN.) FROM R. C - ) C. to HDB. HS. PH. C. to F. PH. ORIGINAL CONFIDENTIAL. R1/M15.11.30. Sent off 22.11.30. x7520 x5520 x238 CAR WORK - SHOCK DAMPERS. The situation about these is not very well… | ||
| Scan088 | The development and performance of shock dampers and related chassis components. | ||
| View original record | (2) Our first move towards making these fittings give better satisfaction is to shorten the levers at the back so that the duty is performed with less stresses and to limit the movement of the axle,… | ||
| Scan089 | Postscript discussing issues with shock dampers, including their positioning, connections, and an oiling problem. | ||
| View original record | (3) P.S. We cannot on examination find much the matter with the dimensions and proportions in use in the present shock dampers. I personally do not like the position of the P. 2. dampers in the frame… | ||
| Scan090 | Modifications to the petrol tank, gauge fitting, filler, wheel carrier, and exhaust fishtail. | ||
| View original record | PY. FROM DA/EV. C. to SG. HS. ORIGINAL DA/EV1/M17.11.30. +460. +7230 P. 2. PETROL TANK, AND EXHAUST FISHTAIL. We send herewith N. schs. 3143/4, shewing the above. SINGLE LINE GAUGE FITTING. This is… | ||
| Scan091 | Specifications and build plan for car 27-EX for the South of France. | ||
| View original record | FROM R. ORIGINAL R1/M17.11.30. 27-EX. - R's CAR FOR SOUTH OF FRANCE. X8992. As this car will not be ready if it waits to be fitted with the special features originally intended, I have come to the… | ||
| Scan092 | Scheme 3172 for rear shock dampers with a 10-inch lever. | ||
| View original record | B/. FROM DA. C. to S/. HS. P. 2. REAR SHOCK DAMPERS. ORIGINAL DA2/M17.11.30. X7520. Herewith we send N. scheme 3172. shewing the rear shock dampers with a 10" lever recently instructed by R. These… | ||
| Scan093 | Proposal and testing of slings under the rear axle. | ||
| View original record | ORIGINAL BY. FROM DA. C. to SC. HS. P. 2. SLINGS UNDER REAR AXLE. DA1/M17.11.30. Eust off 22/11/30 x7510 x7350 Herewith we send N. sch. 3173. shewing the slings under the rear axle as proposed by R.… | ||
| Scan094 | Car springing, discussing spring design, flexibility, and the effects of weight distribution. | ||
| View original record | ~~BY. DA.)~~ FROM R. ~~HS. -E. )~~ C. to SG. WOR. C. to C. PN. C. to CX. LHS. EP. CAR SPRINGING. The pattern and proportion and general design of our road springs are the best and simplest form we… | ||
| Scan095 | Battery support failures, proposing tests to investigate vibration and improve designs for 20HP and 25HP models. | ||
| View original record | FROM DA/EV. EFC. ) Copy to SG. HS/RM. re: BATTERIES (1) P. 2. We are in great need of doing away with the crossmember for the support of the rear of the battery because it limits the depth of the… | ||
| Scan096 | Request for comments from Derby on cost-effective manufacturing for a moulded battery and sheet metal box. | ||
| View original record | (2) This moulded battery and sheet metal box we hope will effect considerable economy but we should welcome comments from Derby indicating in what way any of the pieces might be made more cheaply, and… | ||
| Scan097 | Proposed modifications to the scuttle isolation print, focusing on rubber components and their installation. | ||
| View original record | PY. FROM DA/EV. C. HS/RM. CX/HN. EP. [CX/HN. EP. is struck through] C. JLE. CX/JG. [CX/JG. is struck through] [STAMP: circular stamp with a clock face design. The outer ring says ORIGINAL RECEIVED. In… | ||
| Scan098 | Battery support designs, comparing crossmember and cantilever types, and requesting vibration tests for 20HP and 25HP models. | ||
| View original record | BY. / EFC. ) FROM DA/EV. Copy to SG. HS/RM. re: BATTERIES. (1) P. 2. We are in great need of doing away with the crossmember for the support of the rear of the battery because it limits the depth of… | ||
| Scan099 | Request for comments from Derby on cost-saving measures for a moulded battery and sheet metal box. | ||
| View original record | (2) This moulded battery and sheet metal box we hope will effect considerable economy but we should welcome comments from Derby indicating in what way any of the pieces might be made more cheaply, and… | ||
| Scan100 | Cover memo for an attached document concerning the 25HP oil pump, sump, and filter. | ||
| View original record | FROM E. C. to SG. HS. (SG. is crossed out) 25HP. OIL PUMP, SUMP, AND FILTER. E1/M22.11.30. x5000. Attached please find Lec. 2841., shewing the above. [Stamp Text]: RECEIVED 1930 NOV 12 E. | ||
| Scan101 | Battery placement and subframe design for a 25 HP model. | ||
| View original record | TO [Struck through] FROM EV. COPY TO HS/RM. RE BATTERY. 25 HP. X 5535. We thank you for your BYIO/G.21.11.30. and the print of Scheme No.I405. We fixed our heelboard with reference to the crossmember… | ||
| Scan102 | Design and performance improvements for upcoming car models codenamed 'China' and 'Japan', covering suspension, power unit, axle, and clutch alterations. | ||
| View original record | PS. FROM R. C. to WOR. PY [struck through] C. to HS. C. [struck through] C. to PN. CX [struck through] ORIGINAL [stamp] 25HP. - 18-G-S RECEIVED 28 NOV 1930 [stamp] R2/W25.11.30. X577° This latest… | ||
| Scan103 | Evolution of induction and heating systems, leading to the design of thermostatically controlled shutters. | ||
| View original record | HS. FROM R. C. to SG. WOR. [strikethrough] C. to BY FP [strikethrough] CAR WORK - THERMOSTATICALLY CONTROLLED SHUTTERS. R1/M25.11.30. x7250. x3499. It is somewhat difficult to exactly understand all… | ||
| Scan104 | Car body vibrations, known as 'booming', comparing different body construction materials and engine performance factors. | ||
| View original record | HS. FROM R. C. to SG. WOR C. to BY. EP. C. to DA. ORIGINAL. BOOMING. R4/M26.11.30. X634- If there is anything on a car which has a natural period of vibration at all suiting any vibrations derived… | ||
| Scan105 | Car springing, specifically deflection, flexibility, and a strategy for supplying spare spring leaves to the American market. | ||
| View original record | FROM R. C. to HS. SPRINGING. You can rest assured that there is no difference in the steel used in the American and British springs that will affect the riding qualities. Moreover the material and… | ||
| Scan106 | Limitations, design, and compromises of thermostatically controlled shutters for car engines. | ||
| View original record | HS. FROM R. C to SG. WOR. C to BY. EP. CAR WORK - THERMOSTATICALLY CONTROLLED SHUTTERS. You will realise that in the earlier days when we abandoned the idea of using thermostatically controlled… | ||
| Scan107 | Note on the process of hammering and filing countersunk rivets in sheet aluminium. | ||
| View original record | (2) hammering near the countersunk head which is on the outside, and which is made slightly proud of the surface and then filed up. We think that with their light duty there will be no distortion or… | ||
| Scan108 | Brake drum flexibility issues and proposing design alternatives for increased stiffness. | ||
| View original record | HS. ) FROM R. ORIGINAL BRAKE DRUMS. We telegraphed Derby today as follows: "BAILEY - STOP ALL BRAKE DRUMS PENDING INCREASED STIFFNESS". From Mr. Hancock's description of experience by the Crickle-wood… | ||
| Scan109 | Brake liner wear and proposed modifications to the brake shoe design. | ||
| View original record | (2) It follows also that if the ends of the liners are worn away the brake will appear extra spongy. We think you could prove whether there is anything in this by cutting out about 60º of the middle… | ||
| Scan110 | Selection of a two-note electric horn, comparing Bosch and Klaxon models. | ||
| View original record | CX/HDY. FROM DA/EV. C. to SG. HS. EFC. ORIGINAL. re. HORNS. DA/EV7/M27.11.30. X1163b/c. This is the situation as we see it. Please correct us if we are wrong. (1) We want a two note electric horn with… | ||
| Scan111 | Car springing and the effects of increased deflection on riding qualities. | ||
| View original record | [STAMPED TEXT: RECEIVED NOV 1930] [STAMPED TEXT: ORIGINAL] MSG. FROM R. to WOR. HS. [Text struck through] C.c. to BY. EP. [Text struck through] SPRINGING - re. CAR RUNNING WITH INCREASED DEFLECTION.… | ||
| Scan112 | Design alternatives for fitting a front apron frame cover. | ||
| View original record | FROM DA/EV. DA/EV1/M27.11.30. Copy to HS/RM. P. 2. FRONT APRON. x4531. Many thanks for your HY2/T241130. and enclosures. We saw the apron on 22-EX. today and R. has agreed that he likes the suggestion… | ||
| Scan113 | The redesign of brake drums, including material changes and a new patented braking system to improve performance. | ||
| View original record | FROM R. HS.) C. to SG. WOR. C. to E. BRAKE DRUMS. I have come to the conclusion that for satisfactory brakes it is necessary that we stiffen up our brake drums somewhat in the same way as our earlier… | ||
| Scan114 | Confirmation of a telephone message to Mr. Bailey regarding brake modifications and ordering new ring forgings. | ||
| View original record | Copy to DY. [crossed out] " HS. " TA. [crossed out] " SG. " WDR. " EH. [crossed out] " HF. [crossed out] ORIGINAL R1/M28.11.30. x4612. CONFIRMATION OF TELEPHONE MESSAGE TO MR. BAILEY. re. BRAKES. My… | ||
| Scan115 | Proposed modification to a revised steering column and seat height on model 22-EX. | ||
| View original record | FROM DA/EV. C. to - HS/RM. C. to - C. (struck through) C. to - BY. (struck through) ORIGINAL "C" REVISED/STEERING - P. 2. DA/EV2/M27.11.30. X7430 We saw this fitted to 22-EX. and it was approved as… | ||
| Scan116 | List of proposed modifications for an old car to be used in the South of France. | ||
| View original record | HS. FROM R. Copy to SG. Copy to WOR. Copy to BY. ORIGINAL 18-EX. R3/M28.11.30. x8992 This is my old car which is to be modified for the South of France. (1) Some useful testing might be done if we… | ||
| Scan117 | Improving riveting assembly methods by switching from hand work to machine-done force fits. | ||
| View original record | DY. FROM R. C. to SG. WOR. C. to RG. HS. C. to HY. RHC. C. to E. DA. ORIGINAL R1/M29.11.30. ASSEMBLY. (RIVETING.) E. points out that all riveting when-ever at all possible must be machine done because… | ||
| Scan118 | Design modifications to the 25HP clutch flywheel and cover. | ||
| View original record | DH. FROM E. [Struck through] Copy to SG. [Struck through] Copy to WOR. [Struck through] Copy to HS. ORIGINAL 25HP. CLUTCH FLYWHEEL. E1/M29.11.30. X 5300 We send herewith LeC. 2845. shewing a stiffer… | ||
| Scan119 | Drawings for new ribbed brake drums and the proposed use of manganese steel. | ||
| View original record | FROM DA. C. to HS. ORIGINAL BRAKE DRUMS. DA1/W1.12.30. x4612. We sent you on Saturday the 29th. ult., drawings of N. schemes 3176/7., shewing the new ribbed brake drums turned out of tube or tubular… | ||
| Scan120 | The despatch of shock absorber diagrams. | ||
| View original record | ORIGINAL. HS/RM. FROM DA. DA4/M1.12.30. x235 re. SHOCK ABSORBER DIAGRAMS. I despatched these to you hurriedly on Sat. last, and hope that you received them. I held them for a day or two for further… | ||
| Scan121 | Letter explaining the design choices and evolution of the springing system for the Phantom II. | ||
| View original record | HS/Rm ORIGINAL. xxxxxxx "ELMSTEAD", WEST WITTERING. CHICHESTER, ENGLAND. 1st. December 1930. x7410. x7520. x 2 J.S. COPY TO - SG. [Struck through] COPY TO - HS. ✔ Dear Mr. Beaver, SPRINGING OF PHANTOM… | ||
| Scan122 | Improving vehicle ride quality through weight distribution, springing, and shock damper modifications. | ||
| View original record | (2) Experiments also shewed that if we could get the weight away from the centre of the car and carry it back, over and behind the back axle, the riding would be better, and pitching would be less.… | ||
| Scan123 | The design and performance of hydraulic shock dampers, comparing them to Lovejoy models. | ||
| View original record | (3) But our present dampers should not be unsatisfactory. I have only experienced two troubles - (1) slack developed in the external links, .006" being sufficient to be heard or felt in the rear. This… | ||
| Scan124 | Revised bracket for an exhaust swan neck and the results of related tests. | ||
| View original record | ORIGINAL. BY. FROM DA. C. to SG. HS. P. 2. - EXHAUST SWANNECK. We sent on Sat. the 29. ult., N. sch. 3174., shewing a revised bracket for the swan neck pipe from the 2nd. crossmember for use in… | ||
| Scan125 | Design, advantages, and disadvantages of a proposed 'interlaced' crankshaft. | ||
| View original record | TO. HS. ) FROM R. BY. HFC. ) Copy to SC. WOR. R1/M1.12.30. x7010. x5010. x634. (RECEIVED STAMP: 3 DEC 1930) INTERLACED CRANKSHAFTS. Some time ago I schemed what we termed the interlaced 6 throw… | ||
| Scan126 | Design issues and potential improvements for hydraulic dampers, comparing a new design to Lovejoy dampers. | ||
| View original record | HS. BY.) FROM R. DA. ) [crossed out] C. to SG. WOR. [crossed out] C. to PN. EP. [crossed out] re. HYDRAULIC DAMPERS. It is very distressing to hear that Lovejoy dampers are thought to have beaten us.… | ||
| Scan127 | Schemes for fitting combined reverse, stop, and tail lamps to various car rear-end types. | ||
| View original record | Y. FROM DA. Copy to SG. [struck through] Copy to HS. ORIGINAL P. 2.-N. 2. SERIES. COMBINED REVERSE, STOP & TAIL LAMP. x7800. We send herewith N. schs. 3175/78/79/80., shewing schemes for fitting up… | ||
| Scan128 | Design of a new dual-note electric horn, combining Bosch and Cobra horn notes. | ||
| View original record | CX/HDY. FROM DA/EV. C. to -Su. Spec. C.to -CX- HS. ORIGINAL re. HORNS. DA/EV2/M4.12.30. X/1163e We thank you for CX/HDY12/CP11230., and are pleased To hear that you have sent the sample Klaxon 2 note… | ||
| Scan129 | Proposal for new brake shoes with pivoted ends to prevent squeaks. | ||
| View original record | P/. FROM DA. C. to S/. HS. P. 2. BRAKE GEAR. Herewith we send N. sch. 3182. shewing the proposed brake shoes with pivoted ends for the purpose of preventing squeaks. They go on to the present brake… | ||
| Scan130 | Revised design of a centre pivoted brake shoe. | ||
| View original record | BY. FROM DA. C. to SG. HS. P. 2. BRAKES. ORIGINAL X7950 Herewith we send N. sch. 3183. shewing the revised form of centre pivoted brake shoe, which also goes on to the present anchorage, and uses the… | ||
| Scan131 | Suggesting to experimentally try nickel chrome cast iron for new ribbed brake drums on the Phantom model. | ||
| View original record | PY. FROM DA. C. to HS. ST. PHANTOM - BRAKE DRUMS. DA4/M5.12.30. x4612. ORIGINAL With reference to BY1/J31230, there is a nickel chrome cast iron, which, according to the American papers is used in… | ||
| Scan132 | Print for a Delco-Lovejoy shock damper and the need for timely information from Derby. | ||
| View original record | HS/RM. FROM DA. ORIGINAL DA1/M5.12.30. x837 We thank you for the print of the Delco-Lovejoy shock damper enclosed with HS/RM2/MJ281130. The only thing we have to complain about is that it was not sent… | ||
| Scan133 | The causes and proposed lubrication-based solutions for camshaft squawks. | ||
| View original record | BY. (struck through) FROM E. C. to CG. WOH. HS. (struck through) C. to EP. HS/GWH. (struck through) ORIGINAL P. 2. CAMSHAFT SQUAWKS. V7090. From results of observations and experiments it has been… | ||
| Scan134 | Inquiry regarding the material composition of a Lovejoy-Delco shock damper body. | ||
| View original record | HS/RM. FROM DA. ORIGINAL DA1/M9.12.30. x832. SHOCK DAMPERS. It would be of immediate interest to us to know the material of the Lovejoy-Delco shock damper body. We understand that you are getting a… | ||
| Scan135 | Proposed changes to the P. 2. H.T. magneto wiring due to an overheating issue. | ||
| View original record | FROM E. ORIGINAL E1/M11.12.30. X6020. RECEIVED 12 DEC 1930 To DG. WOR. HS. C. to HS. for GWN. re. OVERHEATING OF P. 2. H.T. MAGNETO WIRING. Confirming our telephone message of even date, it is decided… | ||
| Scan136 | Thermostatically controlled shutters, carburation, and silencers for 25HP and 45HP cars. | ||
| View original record | HS. FROM R. C. to SC. WOR. [Strikethrough] C. to BY. PN. [Strikethrough] CAR WORK 25HP. AND 45HP. THERMOSTATICALLY CONTROLLED SHUTTERS. [Handwritten]: x3499. x7080 x5080.. [Stamped]: ORIGINAL The… | ||
| Scan137 | Performance and proposed modifications to brake drums and shoes. | ||
| View original record | ) FROM R. HS. ) CAR WORK - 25HP. & 45HP. x4612 x7930 x5930. BRAKES. There is no doubt that the flexible brake drum was a wrong move, and to stiffen them up as quickly as possible is right. If we can… | ||
| Scan138 | Engine design decisions for the 25HP chassis, including bore, stroke, and crankcase specifications. | ||
| View original record | SC. ) FROM R. HS. ) C. to WOR. RG. C. to DY. RECEIVED 15 DEC 1930 25HP. CHASSIS. R1/M11.12.30. x5?70 x5010 x5000. (1) It has been decided to keep this in its class by keeping the bore 3.250 so that… | ||
| Scan139 | List of design modifications for a vehicle's engine and chassis components. | ||
| View original record | (2) (d) Cast iron head with 6 separate inlet ports for better distribution and suitable for twin carburetters, larger valves and much better passages, (and permits of double ignition at any time… | ||
| Scan140 | Finalisation of scuttle isolation drawings and the use of rubber buffers. | ||
| View original record | PY. FROM DA/EV. Copy to - HS/AJL. Copy to - EP. Copy to - OX/HN. Copy to - JLR. ORIGINAL SCUTTLE ISOLATION. We all seem to have written a great deal on this subject, and in the end we are thoroughly… | ||
| Scan141 | Requesting a copy of the original list of complaints for a monthly report. | ||
| View original record | HS. ) FROM DA. BY. ) ORIGINAL DA1/M11.12.30. CUSTOMERS' COMPLAINTS - MONTHLY REPORT. X411) With reference to HS/GWH1/MJ81230., this memo. would be much more understandable to us if we had had the… | ||
| Scan142 | Proposal for luggage grids and wheel carriers on the 25HP model. | ||
| View original record | A. FROM DA/EV. C. to S.G. HS. CX. HN. ORIGINAL DA/EV1/M12.12.30. 25HP. - re. LUGGAGE GRIDS & WHEEL CARRIERS. x 5400 y 5600. It is proposed to use on the 25HP. the same system of wheel and luggage… | ||
| Scan143 | Short memo requesting the collection of a 25HP car for an update. | ||
| View original record | HS/RM. FROM E. re. 25HP. RR. AT WW [Stamp] ORIGINAL [Stamp] RECEIVED 15 DEC 1930 HS E1/M13.12.30. X 5770 R. would like you to have the above car to bring it up-to-date. Perhaps you would send a driver… | ||
| Scan144 | Performance improvements and characteristics for car dynamos. | ||
| View original record | ~~EFC.)~~ FROM R. HS. ) ~~C. to SG. WOR. BY.~~ ORIGINAL CAR DYNAMOS. We must always cut in at 15 MPH. We must have current enough to maintain all the running demands at all speeds above 25 MPH. I… | ||
| Scan145 | Design of a cantilever-style battery support. | ||
| View original record | DA/EV.) FROM R. BY. ) (At Le Canadel.) HS. ) C. to SG. WOR. ORIGINAL H. Grylls RECEIVED 18 DEC 1930 R2/M15.12.30. x753S P. 2. BATTERY SUPPORT I understand from DA/EV. that the rear battery support… | ||
| Scan146 | Design sketch for a battery rear support component, sheet 2. | ||
| View original record | ( SHEET 2.) BATTERY REAR SUPPORT. Try .125 sheet steel About .1". Rivets in double shear. Brake ropes. Probably 4 cleats & 4 bolts. My impression is that the above represents approximately the problem… | ||
| Scan147 | Preference and design of a double vertical piston type hydraulic damper. | ||
| View original record | DA/HDY. FROM R. HS. (At Le Canadel.) C. to SC. WOR. [strikethrough] C. to BY. E. [strikethrough] CAR WORK - re. HYDRAULIC DAMPERS. DOUBLE VERTICAL PISTON TYPE. At the moment we prefer this type… | ||
| Scan148 | Design sketch with annotations for a shock damper mechanism. | ||
| View original record | (SHEET 2.) SHOCK DAMPERS. Piston die cast perhaps in bronze, square hole in centre with smallest practical taper, but stirrup can fit pressure plate instead. Suggest we try which is the better: I… | ||
| Scan149 | Proposed modification to the radiator on chassis 18-G-4. | ||
| View original record | BY. FROM DA. C. to SG. HS. ORIGINAL 18-G-4. RADIATOR. DA1/M17.12.30. X5250. As instructed by SG. we send herewith N. scheme 3186. shewing the proposed modification to the bottom tank of this radiator… | ||
| Scan150 | Feedback letter from Sir Henry Royce to coachbuilder Park Ward & Co. detailing eight design flaws on a car. | ||
| View original record | COPY TO - HS/RM. X8992 "CAMACHA". WEST WITTERING. CHICHESTER. 18. Dec. 1930. ORIGINAL Messrs Park Ward & Co. Ltd. 473 High Rd. N. W. 10. FOR ATTENTION OF MR. PARK. Dear Sirs, 27-EX. - SIR HENRY ROYCE… | ||
| Scan151 | Page 2 of a letter listing interior finishing faults and discussing remedial action, with an internal memo attached. | ||
| View original record | (2) (9) The joints of the inlaid work in some cases were not good. (10) We were sorry that the front finishers were not made as symmetrically with the window lift handle as the focus. (12) The black… | ||
| Scan152 | Deleting the carbon from a push button switch and a suggestion to reduce operating trouble by halving spring pressure. | ||
| View original record | E/C. FROM E. C. to SG. WOR. C. to HS. -DY. ORIGINAL RECEIVED 20 DEC 1930 P. 2. PUSH BUTTON SWITCH. E1/M18.12.30. X6015 Regarding the question of deleting the carbon from the push button switch, R. has… | ||
| Scan153 | Dynamo battery system, electrical load calculations, and two-rate charging schemes. | ||
| View original record | E.P.C. FROM E. (struck through) C.c. to E.P.C. W.O.R. (struck through) C. to F.H. H.S. E.T. DYNAMO BATTERY SYSTEM TWO RATE CHARGE SWITCHING. X5780 X8780 X6016 Referring to the proposed one… | ||
| Scan154 | Switchbox modifications and the conclusion that the dynamo cutout is too small, necessitating experimental machines with greater capacity. | ||
| View original record | (2) ORIGINAL We have looked into the alterations required for this scheme and believe it can be accomplished by modifying a few of the simple pieces of the switchbox, provided we accept a battery… | ||
| Scan155 | Dynamo battery system and two-rate charge switching, including electrical load calculations. | ||
| View original record | EFC. FROM E. ORIGINAL E1/M19.12.30. C. to SG. WOR. X.8780 C. to RN. HS. BY. X.5780 DYNAMO BATTERY SYSTEM. X.6016 TWO RATE CHARGE SWITCHING. Referring to the proposed one way inter-connection scheme… | ||
| Scan156 | Page discussing alterations to a switchbox and the capacity of the dynamo cutout. | ||
| View original record | (2) We have looked into the alterations required for this scheme and believe it can be accomplished by modifying a few of the simple pieces of the switchbox, provided we accept a battery brush always… | ||
| Scan157 | Crankshaft and crankchamber design, focusing on balancing, stiffness, and vibration reduction for 25HP and 45HP engines. | ||
| View original record | FROM R. HS. ) (At Le Canadel.) C. to GG. HOR. C. to HG. DR. 25HP. AND 45HP. ENGINES. We have now settled that we must not use cast iron crankchambers unless we do not care about weight and are going… | ||
| Scan158 | Improvements and testing for the 25HP and 45HP models, including crankshafts, suspension, and clutches. | ||
| View original record | (2) One feels that in the improvements we are introducing in the 25HP. all the above will be incorporated. For the 45HP. we need to test the present shaft with the 4 system of balance, using… | ||
| Scan159 | Revision of the Type 4 luggage carrier and rear apron design due to aesthetic criticism. | ||
| View original record | ORIGINAL PY. FROM DA/EV. C. to SG. HS. REVISED TYPE 4. LUGGAGE CARRIER AND REAR APRON. DA/EV1/M20.12.30. V7400 K1531 The present type 4. luggage carrier has been severely criticised as being ugly, and… | ||
| Scan160 | Design and development of 25HP & 45HP epicyclic gearboxes. | ||
| View original record | HS. BY.) FROM R. DA. ) (At Le Canadel.) C. to SG. WOR. (Struck through) C. to E. RHG (Struck through) ORIGINAL 25HP. & 45HP. GEARBOX. EPICYCLIC UNITS. X' 310 X5' 310. X523 I am very anxious to get a… | ||
| Scan161 | Concerns and suggestions regarding a two-rate dynamo charging scheme for a car battery. | ||
| View original record | TO EFC. E.W. (Struck through) FROM R. COPY HS. (Struck through) (At Le Canadel.) C. TO EC. MON. JM. CAR WORKS DYNAMO. TWO RATE CHARGE. (1) I fear the scheme suggested by EFC's memo. of 12/12/30., is… | ||
| Scan162 | Proposal to change resistances and an alternative switching scheme. | ||
| View original record | HS/RM. FROM E. E2/M23.12.30. ORIGINAL RECEIVED 16 DEC 1930 HALF CHARGE SCHEME. HS/RM8/MJ181230. The proposal to change resistances when about to dash off to Edinburgh we agree cannot be taken… | ||
| Scan163 | Suggesting the use of deeper and standardized rubber buffers to improve ride quality after a harsh axle bump. | ||
| View original record | HS. DA.) FROM R. BY. ) (At Le Canadel.) C. to SG. WOR. C. to PN. F. ORIGINAL R3/M23.12.30. CAR WORK - RUBBER BUFFERS. x3864. With the more flexible springs on 18.EX., and a full load, we had a bad… | ||
| Scan164 | Design and balancing of a 25HP & 45HP crankshaft. | ||
| View original record | (R.G.) FROM R. (BY H.S.) At Le Canadel.) Copy to BG. WSH. ORIGINAL X 5010 X 7010 X 634 25HP. & 45HP. BALANCED CRANKSHAFT. We thank RG/TSN. for his work, and blueprint of 18/12/30., and I think we can… | ||
| Scan165 | Crankshaft balancing, counterweights, and flywheel modifications for smoother engine performance. | ||
| View original record | (2) I should keep down the angular dimensions of the weight even if it asked for a slightly larger radius. Although it is better for the master period to keep the radius small I should favour a… | ||
| Scan166 | Modifications for a 25HP radiator to achieve a deeper appearance, including a scale drawing. | ||
| View original record | ORIGINAL HS. ) FROM R. BY ) (At Le Canadel.) to SG. WOR. R4/M23.12.30. X5250 25HP. RADIATOR FOR DEEPER APPEARANCE. Mr. Sidgreaves is pressing that this shall be still deeper than the one running in… | ||
| Scan167 | Testing the force required to operate radiator shutters, diagnosing friction issues, and proposing design geometry changes. | ||
| View original record | K. FROM E. C. to HS. DY. RADIATOR SHUTTERS. E4/M24.12.29. X 3499 X 725/09 We have disconnected the manual control of the shutters on the 20HP. RR. at WW. and tested them with a spring balance to get… | ||
| Scan168 | Proposal for a 4-shoe brake system adapted for the front brakes of the Phantom II. | ||
| View original record | FROM DA. Copy to CC. " DI. " HS. ORIGINAL BRAKES. RECEIVED DEC 1930 DA3/M24.12.30. X 7420. x 7950. Attached is a print of N. scheme 3188., (original to BY.) shewing the proposed 4 shoe brake adapted… | ||
| Scan169 | Design change to the filter in hydraulic shock dampers. | ||
| View original record | R. FROM DA. Copy to SS. " BY. " HS. RECEIVED DEC 1930 ORIGINAL HYDRAULIC SHOCK DAMPERS. DA1/M24.12.30. x 7520. x 5520. x 235, Attached herewith is a print of N. sch. 3190., (original to BY.) shewing… | ||
| Scan170 | Future design possibilities for the 20/25HP model, including engine enlargement and weight reduction. | ||
| View original record | sc. FROM E. C. to R. C. to WSH. C. to Mr. HS. RECEIVED 1A DEC 1930 ORIGINAL FUTURE DESIGN - 20/25HP. E1/A24.12.30. X5770 We have read HS/RM1/AD181230. with deep interest, and while agreeing with the… | ||
| Scan171 | Comparative table of various chassis specifications and a memo regarding weight reduction and increasing engine capacity. | ||
| View original record | (2) CHASSIS. | SIZE. | TYPE OF BODY. | BODY WT. --- | --- | --- | --- Oldsmobile. | 26.4HP. (3.187 x 4.125) / 6 | Sedan. | 6.5 cwt. Cadillac. | 36.4HP. (3.375 x 4.937) / 8 | Town Sedan. | 10 "… | ||
| Scan172 | Potential engine modifications to increase length, bore, and capacity. | ||
| View original record | (3) the length of the engine and demand a longer bonnet, possibly a longer chassis. We have since made another investigation and think that by making the engine only .750 longer overall, and the head… | ||
| Scan173 | Comparison of various car models based on their 'Displacement Per Ton' metric, with handwritten annotations. | ||
| View original record | COPY. HS/RM1/AD18.12.30. contd. This is the best basis of comparison for comparing car performance for similar smoothness. Ford considers his 21 cwt. car spoilt with the English 15HP. fitted. CAR.… | ||
| Scan174 | The pros and cons of drawing intake air from the crankchamber for twin type carburetters. | ||
| View original record | TO HS.) FROM R. BY ) (At Le Canadel.) C. to SG. WOR. (Strikethrough) C. to PN. (Strikethrough) CAR WORK - CARBURETTERS. TWIN TYPE I agree to trying intake in crankchamber. My fear is that too much… | ||
| Scan175 | On American car production experience, with notes on improving acceleration and steering. | ||
| View original record | SC ) FROM R. NOR) (At Le Canadel.) HS. ) * ) CAR WORK -- HIVES' EXPERIENCE AMERICA. X 77 ? First it shews the enormous amount of money and technical energy that the U.S.A. put into their productions.… | ||
| Scan176 | Merits and technical details of increasing the engine size of the 25HP model. | ||
| View original record | SG. FROM R. (At Le Canadel.) C. to Lord Wargrave. C. to LHS. WOR. C. to Mr. Claremont C. to HS. BY. E. DA CONFIDENTIAL. ORIGINAL re. 25HP. My dear SG., Your memo. re. increasing the size of the 25HP.… | ||
| Scan177 | Letter discussing the strategy of mass production with quality, with comparisons to Ford and American competitors. | ||
| View original record | You know how terribly anxious I am to get this model right as quickly as possible, and put it into mass production so that we can sell at such a price as to be able to make enough in number to be… | ||
| Scan178 | Engine specifications and chassis design for a 25HP car model. | ||
| View original record | ✓ FROM R. (At Le Canadel. C. to Sd. WDH. RG. (Sd. is struck through) C. to HS. DH. (DH. is struck through) re. 25HP. ORIGINAL R1/H 2.1.31. 15770 I have never changed my opinion that, on its own… | ||
| Scan179 | Proposed engine modifications, their impact on weight and cost, and torque reaction issues with the 18-EX model. | ||
| 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… | ||
| Scan180 | Design issues with a revised luggage grid, specifically regarding number plate placement and ground clearance. | ||
| View original record | ORIGINAL S/C. FROM DA/EV. Copy to - BY Copy to - HS. P. 2. REVISED TYPE 4. LUGGAGE GRID. DA/EV3/M5.1.31. X7400. With reference to SG10/E311230., para. 4., we regret that the number plate cannot be… | ||
| Scan181 | Patent situation and design considerations for double-acting shock dampers. | ||
| View original record | DA BY.) FROM R. HS. ) (At Le Canadel.) C. to BG. WGR. E. C. to Mr. CLERMONT. ORIGINAL R1/M6.1.31. X235 x83 > SHOCK DAMPERS. THE PATENT SITUATION, ETC. (1) It would seem that we ought to have been able… | ||
| Scan182 | Technical memorandum discussing damper design, including slack removal, lubrication, and specific design considerations. | ||
| View original record | (2) (C) We shew a method of keeping all the slack out of the piston and its cam without taking up headroom: here the spring loading has to be sufficient for a vacuum under the piston and the inertia… | ||
| Scan183 | Dynamo output issues and proposing a voltage control vibrator as a solution. | ||
| View original record | SG. HS. ) FROM R. E. EFC. ) (At Le Canadel.) C. to WOR. DA. PN. ORIGINAL DYNAMO OUTPUT. R3/M6.1.31. X6084 X6004 X6016 X6006 The complaints such as output of dynamo we can put right, but I think we are… | ||
| Scan184 | Dynamo output, battery charging, and potential failure schemes for a vibrator. | ||
| View original record | (2) (1) A better output can be taken from the same dynamo, or the same output with less rise of temperature. (2) The lamps would be better fed with current when the battery was low. (3) Greater… | ||
| Scan185 | Difficulties and strategy for the American car trade, including the introduction of a new 12-cylinder engine. | ||
| View original record | [Crossed out: CC. WOR.)] FROM R. [Crossed out: HS. E. )] (At Le Canadel.) ORIGINAL R2/M6.1.31. [Handwritten: 1957?] re. AMERICAN TRADE. I thank Mr. Hives for his very able and complete report. To make… | ||
| Scan186 | Comparing two design schemes (3193 and 1413) for a universal dashboard. | ||
| View original record | pk. FROM DA. [pk. is struck through] Copy to SG. [SG. is struck through] Copy to HS. DA2/MS.1.31. [Stamp] ORIGINAL P. 2. UNIVERSAL DASHBOARD. We send herewith N. scheme 3193. shewing a universal… | ||
| Scan187 | Preliminary specification document for a 28HP chassis. | ||
| View original record | ORIGINAL E1/M8.1.31. X5770 PRELIMINARY SPECIFICATION OF 28HP. CHASSIS. Wheelbase and general dimensions of chassis remain as present 25HP. ENGINE. 3.4 X 5" 6 = Capacity 4.46litres. As per design in… | ||
| Scan188 | Design suggestions and cost-saving measures for a new chassis, including the L.H. 28HP 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 effected… | ||
| Scan189 | Page discussing the maintenance of production flow for right and left-hand chassis. | ||
| View original record | (3) 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. | ||
| Scan190 | Suggestion to replace 60 watt headlamp bulbs with 48 watt bulbs to better manage battery discharge and to standardize all bulbs used in the chassis. | ||
| View original record | FROM E. Cp. to Cor. WCH. spoke per phone C. to HS. EFC. ORIGINAL DYNAMO OUTPUT. RECEIVED 11/W9.1.31. X6084 X6089. Before leaving Derby we suggested that the 60 watt bulbs in use on our headlamps… | ||
| Scan191 | Modifications to a two-charge electrical system for a car. | ||
| View original record | FROM E. C. to SG. WOR. FH. C. to EH. HS. EH. TWO CHARGE SCHEME Before leaving Derby we arranged by mutual agreement with Works for SG's car to be rigged up with what we thought was the best that could… | ||
| Scan192 | P. 2 piston being too short and proposing trials for a modified, longer version. | ||
| View original record | P/. FROM E. (P is struck through) C. to HS. MX. (MX is struck through) P. 2. PISTONS. When in Derby I was present at a discussion with HS. and MX. at which some outline drawings were exhibited shewing… | ||
| Scan193 | Feasibility of machining a 3.4 bore cylinder on existing 25HP centres for a 28HP cylinder block. | ||
| View original record | P. FROM E. SECRET. x 5050. E2/M10.1.31. C. to BG. OR. HS. C. to HY. RMC. 28HP. CYLINDER BLOCK. We send herewith LeC. 2858. shewing an outline of a 3.4 bore cylinder on the existing 25HP. centres. You… | ||
| Scan194 | Failure of a 25HP exhaust manifold and potential design improvements. | ||
| View original record | PY. FROM E. S. to RR. WOR. [Struck through] C. to RR. Chr. [Struck through] ORIGINAL [Stamped] 25HP. EXHAUST MANIFOLD. We have a sample of the above handed to us by GWH., which has broken at the usual… | ||
| Scan195 | Modifications and material trials for a double piston shock damper design. | ||
| View original record | Pt. FROM DA. C. to SG. HS. DOUBLE PISTON SHOCK DAMPER. DA4/M10.1.31. X-235- We send herewith N. sch. 3195. shewing a slight modification to N. sch. 3190. to give better clearance for the lever. Since… | ||
| Scan196 | Proposed modifications to a piston for an epicyclic 3rd-speed gearbox with revised vacuum control. | ||
| View original record | P.Y. FROM DA. C. to S.G. HS. EPICYCLIC 3rd SPEED GEARBOX REVISED VACUUM CONTROL. [Stamped Text]: ORIGINAL [Stamped Text]: RECEIVED [unclear] 4 MAY [unclear] DA3/W10.1.31. x523. We send herewith N.… | ||
| Scan197 | Design and production problems, discussing the need for more economical production to compete with the USA. | ||
| View original record | TO. E. B. (Mr. R) DY. HS. ) (At Le Canadel.) [Crossed out] FROM R. C. to SG. WOR. (Mr. C. to Lord Wargrave. C. to Mr. Claremont. DESIGN AND PRODUCTION PROBLEMS. I am quite in agreement with Mr. Hives… | ||
| Scan198 | The conclusion of a report thanking Mr. Hives and recommending strengthening the purely technical staff. | ||
| View original record | (2) To conclude, we must thank Mr. Hives for his excellent report with which we thoroughly agree. I suggest strengthening our purely technical staff, which one thinks is far better than the average of… | ||
| Scan199 | Design specifications for the 25HP model, covering the back axle, gearbox, and radiator. | ||
| View original record | FROM R. BY. HS. ) (At Le Canadel.) re. 25HP. SPECIFICATION. I agree to all the points E. mentions, but some may lead to delays, it being difficult to change our methods and get really first class… | ||
| Scan200 | Improvements for thermostatically controlled radiator shutters to manage water temperature and improve carburation. | ||
| View original record | [Struck through: E. HS.] ) FROM R. [Struck through: BY.] ) (At Le Canadel.) [Struck through: C. to SG.] WOR. ORIGINAL R3/M11.1.31. X3499 THERMOSTATICALLY CONTROLLED RADIATOR SHUTTERS. It has now been… | ||
| Scan201 | Methods for interior car heating, preferring hot water over exhaust systems. | ||
| View original record | E. EX. ) FROM R. BY. HS. ) (At Le Canadel.) C. to SG. WOR. C. to DA/EV. INTERIOR HEATING OF CARS. HS' report is very useful. I prefer using the hot water in a radiator specially for heating the rear… | ||
| Scan202 | Connecting rod length for the Improved 25HP engine, analysing vibration and comparing ratios. | ||
| View original record | R. FROM E. C. to SG. WOR. C. to HS. BR. CONNECTING ROD LENGTH. IMPROVED 25HP. X,5030. 8634 Referring to HS/RM1/WJ9131., we have always had the impression that the 25HP. manifested over-run vibration… | ||
| Scan203 | Engine connecting rod lengths and ratios for different engine types. | ||
| View original record | (2) The actual rod lengths are given in the following table: STROKE. | CON. ROD. | ENGINE. | RATIO. ------- | --------- | ------------ | ------ 4.5 | 7.95 | Standard 25. | 1.77 4.5 | 8.45 | LeC. 2756.… | ||
| Scan204 | The preliminary general arrangement for a 28HP engine, detailing modifications and design particulars. | ||
| View original record | DY. FROM E. C. to HS. Mr. ENG. SECRET 28HP. ENGINE. PRELIMINARY GENERAL ARRANGEMENT. We send you herewith a print of LeC. 2853. showing the above. This drawing gives particulars of the pistons, con.… | ||
| Scan205 | Re-design of the engine mounting for the improved 25HP chassis. | ||
| View original record | ORIGINAL HS/GWH. FROM E. Copy to PV. re. ENGINE MOUNTING. E3/M13.1.31. x5005- x 634 HSG 13 JAN 1931 Referring to HS/GWH1/MJ12131., we have just finished re-scheming the part of the engine mounting for… | ||
| Scan206 | Requesting modifications to the Phantom 2's thermo-operated shutters and radiator tank. | ||
| View original record | R. FROM E. C. to EG. BY. HS. DA. ORIGINAL E1/M14.1.30. x 7250. x 3499. PHANTOM 2. THERMO: OPERATED SHUTTERS. It should be understood that we are asking for .125 to be added to the overall thickness of… | ||
| Scan207 | Causes of ignition coil failure and potential design improvements. | ||
| View original record | EFC. ) FROM R. HS. E. ) (At Le Canadel.) C. to SG. WOR. PN. IGNITION COILS. AS R. UNDERSTANDS THEY EXIST. I presume that coil failure is not due to moisture being either in or on the insulation when… | ||
| Scan208 | Comparison of ignition coil insulation with American counterparts, discussing potential improvements through methods like vacuum impregnation and oil filling. | ||
| View original record | (2) Compared with the American coils we have more strain on our insulation because they run their cars with shorter gaps, and plugs are very cheap and often changed. They are not so liable to… | ||
| Scan209 | Proposed modification to the design of hydraulic shock dampers, focusing on the piston and side links. | ||
| View original record | DA/HDY. R. ) FROM R. BY. HS. ) (At Le Canadel.) C. to SG. WOR. HYDRAULIC SHOCK DAMPERS. I am not quite content with some of the details of our latest design of the above, and I shew on the attached… | ||
| Scan210 | Hand-drawn sketch of a mechanical assembly with design notes. | ||
| View original record | THIS CENTRE MUST BE CONCENTRIC CAN BE ROUND OR SQUARE IF SQUARE MUST BE RIVETED HENCE SCREW FROM BOTTOM 30° < 30 > ALTERNATE SCREWS ACCORDING TO UPPER PIN HAVING SQUARE OR ROUND ENDS | ||
| Scan211 | Strategy for patent renewals, favoring numerous inexpensive, defensive patents. | ||
| View original record | ~~BY. F.H.R.~~ ) FROM R. ~~To. HS.~~ ) (At Le Canadel.) ~~Copy to SC WOR~~ re. PATENT RENEWALS. ORIGINAL R2/W15.1.31. Y1898. I agree with Mr. Bailey's report and proposals. I think we should continue… | ||
| Scan212 | Design of the Japan 3 crankshaft damper and spring drive. | ||
| View original record | K. FROM E. Copy to GG. " WDR. " HS. " RV. ORIGINAL JAPAN 3. - CRANKSHAFT DAMPER AND SPRING DRIVE. EL/M15.1.31. X5010. X5020. HS. has been telling us of a crankshaft damper made in the States for… | ||
| Scan213 | With a diagram proposing modifications to the front engine suspension for the 'Japan 3' model. | ||
| View original record | R. FROM E. C. to SG. C. to WOR. C. to HS. JAPAN 3. FRONT ENGINE SUSPENSION. [STAMP] ORIGINAL E2/M15.1.31. XJ-005- XS25-0. By reason of the projected modifications to the slipper flywheel mentioned in… | ||
| Scan214 | Proposed modifications to the rear axle, bearings, and brake gear due to an increase in engine power. | ||
| View original record | K. FROM DA. [Struck through] C. to BG. WOR. [Struck through] C. to F. BY [Struck through] C. to HS. ORIGINAL [Stamp] P AN 3. DA2/M/16.1.31. x5770. x 5350. x 5360. With reference to the back axle of… | ||
| Scan215 | Query regarding the replacement of a roller bearing with a ball bearing on a gearbox reverse shaft. | ||
| View original record | BM. FROM DA. Copy to HS. RECEIVED JAN 2. 1931 HS ORIGINAL 2. GEARBOX. DA1/M16.1.31. X7310. We notice on a drawing we have here that the roller bearing on the rear end of the reverse shaft originally… | ||
| Scan216 | Advantages and disadvantages of long versus short connecting rods in 25HP and 45HP car engines. | ||
| View original record | TO. HS.) FROM R. BY. ) (At Le Canadel.) C. to SG. WOR. DA. CAR ENGINES 25HP & 45HP. CON. ROD LENGTH, ETC. I have thought over HS/RM's and E's memos. concerning the ratio of con. rod to stroke. I think… | ||
| Scan217 | Responding to Mr. Elliott, discussing the relationship between the rod length to crank radius ratio and its effects on engine forces and flywheel inertia. | ||
| View original record | (2) If my conclusions are not correct perhaps E. and HS/TSN. will write to me again on the subject. I read Mr. Elliott's memo.- l/r :- r = crank radius, l = rod length. If this is correct my… | ||
| Scan218 | Flywheel vibrations at high speeds and proposed solutions involving stiffer shafts or double bearings. | ||
| View original record | E. HS.) FROM R. BY. ) (At Le Canadel.) C. to SG. WOR. RG. CAR WORK - P. 2. & JAPAN. FLYWHEEL VIBRATIONS. I am not quite clear that we know if the larger crankshafts proposed for our car work will keep… | ||
| Scan219 | Pros and cons of magneto ignition versus battery ignition systems. | ||
| View original record | R. FROM E. C. to BG. WGR. [Strikethrough] C. to HS. BY. [Strikethrough] MAGNETO IGNITION. Referring to HS1/MJ14131. we have at WW. for some time past been weighing up the pros and cons of magneto… | ||
| Scan220 | Approval of a dashboard drawing. | ||
| View original record | HS. DA.) FROM R. E. BY.) (At Le Canadel.) C. to SG. WOR. P. 2. DASHBOARD. Naturally I think one pattern of dash excellent if a satisfactory design can be made. I do not know all the conditions, but… | ||
| Scan221 | Value of magneto reserve ignition and proposing a switch to a double battery system. | ||
| View original record | ORIGINAL. R2/M17.1.31. E. HS.) FROM R. BY. ) (At Le Canadel.) C. to SG. WOR. RG. (Struck through) X.6098. re. CAR WORK. X.6105. EFC. Mr. Hives points out that our magneto reserve is not of the value… | ||
| Scan222 | Request from America for silver instrument dials instead of black ones. | ||
| View original record | HA. FROM DA/EV. C. to EY. HS. P. 2. L.H. - N. 2. SERIES. DA/EV1/M19.1.31. x7530 We understand from HS. through DA. that America do not like the black dials of our instruments in conjunction with black… | ||
| Scan223 | Dispatch of a replacement print showing a horizontal section of a Japan 3 cylinder head. | ||
| View original record | PY. FROM E. Copy to SG. Copy to WOR. Copy to HS. E2/M19.1.31. x505D. JAPAN 3. CYLINDERHEAD. ORIGINAL We send you herewith print of LeC. 2864., as promised in our memo. EL/18131 shewing horizontal… | ||
| Scan224 | Longer experimental pistons for the P.2 engine, with reference to accompanying illustrations. | ||
| View original record | EY. FROM E. C. to WDR. HS. MX. re. LONGER EXPERIMENTAL PISTONS FOR P. 2. ORIGINAL 20-1-31 X70940. We are sending you herewith LeC/2861. shewing the illustrations of various pistons compared, xxx… | ||
| Scan225 | Torque reaction vibrations at low speeds and an engine firing in the silencer on a 45HP car. | ||
| View original record | HS. F. ) FROM R. DA. BY. ) (At Le Canadel.) Copy to SG. WOR. ORIGINAL R1/M20.1.31. 18-EX. V799V This car, owing to bad roads, is often pulling hard from just below 20 MPH., and in passing 20/22 MPH.… | ||
| Scan226 | The Japan 3 cylinder head, discussing starting torque and compression ratio. | ||
| View original record | BY. FROM E. C. to SG. WCR. HS. JAPAN 3. - CYLINDER HEAD AND STARTING TORQUE. In reply to your recent memo. concerning the starting torque please note we will look into the question of what… | ||
| Scan227 | Proposal to use a right-hand drive engine in a left-hand drive 'Japan 3' chassis. | ||
| View original record | R. FROM E. C. to SS. WCR. C. to HS. DY. JAPAN 3. LEFT HAND CHASSIS. Please find attached prints LeC. 2863. and 2865. dealing with the above. These prints are from rough schemes shewing the proposal to… | ||
| Scan228 | Design improvements for the 'Japan Engine', focusing on crankshafts, vibration, engine torque arms, and radiator mounting. | ||
| View original record | E. HS.) FROM R. BY. ) (At Le Canadel.) C. to SG. WOR. HY. (Struck through) C. to RG. RHC. (Struck through) JAPAN ENGINE ORIGINAL (Stamp) X5250. X634. X5770. X5010 (Handwritten) If it is necessary for… | ||
| Scan229 | Design sketch for a starter handle shaft and a confirmation of a telegram regarding design simplification. | ||
| 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… | ||
| Scan230 | Suitability of an American-style folding arm luggage carrier for European customers and comparing market requirements. | ||
| View original record | [Crossed out: SG.] FROM DA/EV. C. to - HS. [Crossed out: BY.] P. 2. REVISED TYPE LUGGAGE CARRIER. DA/EV2/M22.1.31. X7400 [STAMP: ORIGINAL] With reference to HS6/MJ19131., you will remember that when… | ||
| Scan231 | Design and location of a toolbox, customer objections, and its proposed contents. | ||
| View original record | TO: FROM DA/EV. Copy to - R. " WOR. " HS. " DY. " E. RECEIVED JAN 23 1931 TOOLBOXES. DA/EV1/M22.1.31. X7580 With reference to HS6/WJ15131., describing the toolbox under the front seat as proposed by… | ||
| Scan232 | Confirmation of a telegram suggesting tests on China crankshafts with different pin diameters. | ||
| View original record | CONFIRMATION OF TELEGRAM. Copy to S.G. " R. " WOR. " BY. HIVES. ✓ ROYCAR. DERBY. RECEIVED JAN 23 1931 H= WW. 22. 1. 31. X5010. REGARDING HS/RM2/KT15131. SUGGEST SIMILAR TESTS ON THE AVAILABLE CHINA… | ||
| Scan233 | Design revisions for the 'Japan 3' engine scheme, including shaft diameters and cylinder skirts. | ||
| View original record | K. FROM E. [Strikethrough] C. to SG. WOR. [Strikethrough] C. to HS. BY. JAPAN 3 - GENERAL SCHEME OF ENGINE - LeC. 2853 [Stamped: ORIGINAL] X5770 Y 5010 We have not hastened to send you a print of the… | ||
| Scan234 | Preferred arrangement of battery cells based on width, referencing a National Accumulator catalogue. | ||
| View original record | E/C. FROM DA. C. to WGR. HS. C. to RHC. BY. ORIGINAL JAPAN BATTERY. DA2/A123.1.31. X6107 It seems certain that we shall want to use the battery arranged with all the cells with the long dimensions… | ||
| Scan235 | More cost-effective and higher capacity battery for the Japan 3 model. | ||
| View original record | CH/WOR. FROM DA. to EFC. HS. to RMC. DY. JAPAN 3. ORIGINAL DA3/M23.1.31. X6107 On looking through the National Accumulator Co's list we see that the 20HP. battery is considerably more expensive than… | ||
| Scan236 | Magneto ignition issues, coil insulation, and spark plug gap settings for 25HP and 45HP cars. | ||
| View original record | HS. ~~EFC. EP.~~) FROM R. ~~E. BY.~~) (At Le Canadel.) ~~C. to - SG. WOR. PN.~~ CAR WORK - MAGNETO IGNITION. X6097/8 X6058 X8970. [Stamp: CANAL.] It is understood that both the 25HP. and 45HP. cars… | ||
| Scan237 | Design and modifications for a petrol tank for the 'Japan 3' project. | ||
| View original record | AR. FROM DA. RECEIVED 26 JAN 1931 to SG. HS. to BY. HY. COPY JAPAN 3. - PETROL TANK, ETC. DA7/M23.1.31. x5460. x5770. Derby consider that they can press the bosses in the petrol tank for carrying the… | ||
| Scan238 | Alternative reverse gear designs for the Japan 3 gearbox. | ||
| View original record | DA/HDY. E. ) FROM) HS. BY. ) (Le Canadel. L. C. to SG. WOR. BY. RHC JAPAN 3. GEARBOX. R1/W23.1.31. X5310 X523 After looking over the preliminary drawings for the above I wired that I thought we might… | ||
| Scan239 | Hand-drawn schematic of a gearbox design with annotations. | ||
| View original record | CONSTANT MESH 3RD SPEED GEARS 2ND SPEED WHEEL LOCKING FROM BACK OF BOX 3RD 2ND 1ST 1ST AND REVERSE DRIVERS ABOUT SAME DIAMETER 2ND DRIVER RATHER LARGER THAN REVERSE DRIVER SHAFT SUPPORT CAN BE CUT… | ||
| Scan240 | Design modifications for torque arms, engine suspension, and gears. | ||
| View original record | A. FROM E. C. to EE. WCR. HS. [Struck through] C. to EH. HY. RHC. ORIGINAL El/M24.1.31. x577D. We are sorry that the scheme shewing the torque arms was a disappointment, and are modifying it as per… | ||
| Scan241 | Referencing a print of a Japan crankshaft with a pinion formed solid with the shaft. | ||
| View original record | REC. FROM E. C. to SG. NON. TC to HS. DI. HY. E2/M24.1.31. X5010 ORIGINAL JAPAN CRANKSHAFT. With reference to memo. R1/M21.1.31., we attach herewith a print of the rear end of the crank shewing pinion… | ||
| Scan242 | Potential design simplifications and improvements for the Japan 3 engine. | ||
| View original record | E. HS.) FROM R. BY. ) (At Le Canadel.) C. to - SG. WOR. ORIGINAL JAPAN 3. ENGINE. R2/M25.1.31. x5770. If we have got to have spring drive I think the aero engine type which we decided for the private… | ||
| Scan243 | Design proposals for an eccentrically engaged reverse gear mechanism, with sketches. | ||
| View original record | FA/HDY. Er) FROM R. -BY. HS. ) (At Le Canadel.) Copy to BG. WOR. JAPAN 3. GEAR DESIGN. R1/H/25.1.31. X5310 XS-3 As regards eccentrical engaged reverse I think that if Works can arrange to cut the… | ||
| Scan244 | Potential gearbox design modifications, including a simplified diagram of a gear layout. | ||
| View original record | (2) ORIGINAL 2nd. That none are so satisfying as the original - i.e. with special gear - present and Phantom 2. 3rd. That the original although appearing costly) can be made of a more crude design;… | ||
| Scan245 | Sketch of a 'Swinging Reverse' mechanism, labelled as Sketch 1. | ||
| View original record | (3) SWINGING REVERSE. SKETCH 1. Reverse slider. Looking backwards from engine. | ||
| Scan246 | Urgent final recommendation sketch for a shaft and pinion assembly. | ||
| View original record | (4) FINAL RECOMMENDATION. URGENT. SKETCH 2. Central. Rear end of box. Bore box probably one size right through, pass pinion and shaft in from rear, put on wheel and tighten nut through hole in front.… | ||
| Scan247 | Designs for crankshaft pinion timing gears and a proposed modification to an existing 25HP engine to cure flywheel vibration. | ||
| View original record | K. FROM E. C. to EG. WOR. C. to HS. EY. JAPAN TIMING GEARS. EL/M/26.1.31. x654 x5016. Please find attached copy of our telegram of even date re. crankshaft pinion at rear end of crank solid with… | ||
| Scan248 | Comparison of four different designs for a journal and flywheel flange. | ||
| View original record | ① PRESENT CHINA JOURNAL 2.125" 2.25 2.5 1.0" ② 2.3 ③ 2.25 2.3 12 5/16" BOLTS FLYWHEEL FLANGE ④ 2.3 10 5/16" STUD OR SET SCREWS | ||
| Scan249 | Sending an experimental double rear crank bearing for testing on a 20/25 engine. | ||
| View original record | HS. FROM E. C. to SG. C. to R. C. to BY. ORIGINAL JAPAN 3. - DOUBLE REAR BEARING. Referring to the last paragraph of memo. E1/M26131. to R., we send you herewith LeC. 2870. shewing experimental double… | ||
| Scan250 | Cover note for a blueprint detailing a proposed arrangement of units for both right and left-hand chassis. | ||
| View original record | HS. FROM E. Copy to SC. Copy to WOR. Copy to BY. x5770. JAPAN ORIGINAL E2/M27.1.31. Herewith please find blueprint of LeC. 2869., illustration sent with memo. E1/M24.1.31. to R., of proposed… | ||
| Scan251 | Chassis modifications and drawings for the Continental Touring 20/25 model. | ||
| View original record | [STAMP: ORIGINAL] FROM DA/EV. DA/EVL/M27.1.31. C. to SG. HS. CX. CONTINENTAL TOURING 20/25. x57-0 We send herewith N. schs. 3198/99. & 3200., shewing details of the F. type column and pedals for the… | ||
| Scan252 | Proposed rear road springs for the 20/25 HP Continental Touring Chassis. | ||
| View original record | TO HY. FROM EV. EVI/28.I.31. X5120 X5410 COPY TO HS. RE SPRINGS. ( REAR ). CONTINENTAL TOURING 20/25.HP. [STAMP: ORIGINAL] [STAMP: RECEIVED 30 JAN 1931] We send herewith N.Sch.3202. shewing the… | ||
| Scan253 | Failure of a low inertia slipper wheel (crankshaft damper disc) and suggesting design improvements to strengthen it. | ||
| View original record | K. FROM E. (K. is struck through) C. to SG. HOR. (Struck through) C. to HS. DY. (Struck through) P. 2. LOW INERTIA SLIPPER WHEEL. x634. We send you herewith the broken crankshaft damper disc mentioned… | ||
| Scan254 | Design proposals and challenges for the Japan 3 engine components, including the crankshaft, flywheel, and gear arrangements. | ||
| View original record | E. BY. HS.) FROM R. HY. RHG. ) (At Le Canadel.) C. to SC. WOR. PA. JAPAN 3. ENGINE. R1/M28.1.31. I am quite satisfied with the arrangement shewn on E's sketch comprising 3 gears at rear between the… | ||
| Scan255 | Design notes and sketches for various mechanical components, including a nose support and crankshaft assembly. | ||
| 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… | ||
| Scan256 | Modifying the crankcase oil filler to be larger, allowing oil to be poured directly from a can. | ||
| View original record | P.T. FROM E. to SC. WOR. c.c. HS. [STAMP] ORIGINAL [STAMP] RECEIVED 29 JAN 1931 OIL FILLER FOR CRANKCASE. We agree with your remarks about the oil filler. The present dia. of our oil fillers is based… | ||
| Scan257 | Scheme 3025 for the Phantom II exhaust system, reverting to an original design for holding down bolts. | ||
| View original record | DY. FROM DA. Copy to SG. Copy to HS. PHANTOM 2. EXHAUST SYSTEM. X 7-30 We send herewith scheme 3025. shewing the aluminium front expansion box adapted to receive a 3" downpipe in accordance with the… | ||
| Scan258 | Cost-saving modifications to the spring anchorages for the Japan 3 model. | ||
| View original record | FROM DA. S. to SG. by C. to HS. ORIGINAL JAPAN 3. SPRING ANCHORAGES. DA2/H29.1.31. x 5410. During our visit to Derby the front anchorage of the rear spring was criticised from the point of view of… | ||
| Scan259 | Phantom II exhaust system and a new design for the aluminium silencer cutout. | ||
| View original record | BY. FROM DA. Copy to SG. Copy to HS. ORIGINAL PHANTOM 2. EXHAUST SYSTEM. ALUMINIUM SILENCER. DA2/M29.1.30. x7230 Herewith we send N. sch. 7026. shewing the cutout arranged to avoid aluminium inside… | ||
| Scan260 | Design choices for the Japan 3 engine, including ignition, governors, and connecting rod lengths. | ||
| View original record | E. HS. FROM K. (At Le Canadel.) c. to SG. WOR. BY. c. to HY. RHC. JAPAN 3. ENGINE. LeC. 2853. x5770. x8030. x6105. This seems quite right. The only additional suggestions I can make at the moment are… | ||
| Scan261 | Summary of a letter discussing engine design schemes, vibrations, and a proposal for a new, larger capacity engine as a response to competitors. | ||
| View original record | SG: FROM R. (At Le Canadel.) SECRET AND CONFIDENTIAL. C. to Lord Wargrave. C. to Mr. Clermont. C. to LHS. WOR. E. C. to HS. BY. RG. DA. P. & JAPAN ETC. The summary of this letter (if one has not time… | ||
| Scan262 | Engine and flywheel vibration issues in various car designs. | ||
| View original record | (2) The Japan 3. designs did not seem to be shaping well, and other troubles of P. 2. made me think the directors would like me to return, but I am glad they do not because I can still do a little to… | ||
| Scan263 | Engine balance, crankshaft stresses, high revolutions, and steering issues. | ||
| View original record | (3) (1) Less overhanging weight but this is less important than at first appeared (because not pure whirl.) (11) Less weight remote from the centre of oscillation more important, but takes away our… | ||
| Scan264 | On the Japan 3 engine design, comparing 6-cylinder and 12-cylinder options. | ||
| View original record | R. DA. FROM R. HS. BY. (At Le Canada) S. to CC. WOR. C. to HY. HUC. JAPAN 3. R3/H/29.1.31. x5770. [Stamp 1: Circular, purple ink] C.W.P. 28 FEB 1931 H.S. ORIGINAL [Stamp 2: Rectangular, teal ink]… | ||
| Scan265 | Potential modifications to the front end of a vehicle frame for 'Japan 3'. | ||
| View original record | BY. FROM DA. Copy to WOR. Copy to HS. JAPAN 3. FRAME ORIGINAL DA4/M29.1.31. Y 5380 We should of course find it a great advantage if we could have had a new frame, but we presume that this is out of… | ||
| Scan266 | Proposed modifications to the front axle for cost reduction and simplification. | ||
| View original record | R. FROM DA. C. to SQ. WOR. C. to HS. BX. FRONT AXLE. While we were in Derby we inspected parts of the front axle with a view to cheapening them. The 20HP. brake operating scheme is more expensive than… | ||
| Scan267 | Design review and commentary on the 'Japan 3' petrol tank. | ||
| View original record | Ex. BY. HS. ) FROM R. DY. HS. ) (At Le Canadel.) C. to SC. WOR. HY. JAPAN 3. PETROL TANK. X5460. This looks rather a lot of work but I suppose it compares favourably with competitors in value. (1) It… | ||
| Scan268 | Revised gearbox drawing, incorporating Maybach jaws and comparing it to a Chrysler design. | ||
| View original record | R. FROM DA. C. to SG. WOR. C. to HS. DY. JAPAN 3. GEARBOX DA2/M31.1.31. ys310. We send herewith N. sch. 3210., unfinished drawing of the gearbox, revised by the inclusion of the Maybach jaws, and the… | ||
| Scan269 | The 'Japan 3' project detailing suggested modifications for the rear axle and brakes. | ||
| View original record | R. FROM DA. (The 'R.' is struck through) C. to SG. WOR. (This line is struck through) C. to HS. BY. JAPAN 3. - REAR AXLE AND REAR BRAKES. Herewith we send prints of N. schs. 3203/4/5., unfinished… | ||
| Scan270 | Proposed proportions for the 'Japan 3' model's bonnet, radiator and dashboard, based on criticisms of the 18-G-4 model. | ||
| View original record | BY. FROM DA/EV. (BY. is struck out) C. to R.R. S.C. (Struck out) C. to WOR. HS. (Struck out) EV1/W31.1.31. x 5-60. x 5-250 x 5-500 [STAMP: RECEIVED, with clock face and date 1931 FEB 5] [STAMP:… | ||
| Scan271 | Use of single versus double carburetters for 6-cylinder car engines. | ||
| View original record | HS. E.) FROM R. BY. ) (At Le Canadel.) ORIGINAL R2/M1.2.31. Copy to SG. Copy to WOR. Copy to RG. CARBURETTERS - 6 CYL. CAR ENGINES. x7080 x5080. I understood that we must use double carburetters if we… | ||
| Scan272 | Crankshaft torsional vibrations, the low inertia slipper wheel, and engine performance concerns. | ||
| View original record | E. HS.) FROM R. BY. ) (At Le Canadel.) Copy to SG. WOR. R1/M1.2.31. x634. x7480. x5770. P. 2. LOW INERTIA SLIPPER WHEEL. The breakage of the steel disc I think shews that the crankshaft shortens and… | ||
| Scan273 | Phantom II exhaust heated induction system and a related silencer design. | ||
| View original record | HS. FROM E. ORIGINAL E1/M1.2.30. C to SC B (hold up) C to WOP by Div x7230. x7910 x7070 PHANTOM 2. EXHAUST HEATED JACKET INDUCTION SYSTEM - HS/AJL1/MJ30130. We are glad you find our malleable iron… | ||
| Scan274 | Increasing weight of car bodies beyond set limits and proposing stricter inspection during the construction process. | ||
| View original record | cc. FROM DA/EV. C. to - C. WOR. C. to - HS. CONFIDENTIAL re. CAR WEIGHTS. From EP8/T14131, it appears that the continental touring cars have exceeded the weight limit and one fears they may grow in… | ||
| Scan275 | Tabulated list of vehicle weights for experimental and production cars, detailing chassis and body weights. | ||
| View original record | 40/50. CAR. | BODY. | CHASSIS AND ALL ON. cwt. qrs. lbs. | BODY WEIGHT. cwt. qrs. lbs. | TOTAL WEIGHT. cwt. qrs. lbs. | REMARKS. EXPERIMENTAL. 18-EX. | Barker Sports Saloon. | 37. 2. 11. Long chassis.… | ||
| Scan276 | Arguing against removing the frame tie-bars on the 'Japan 3' model due to structural integrity concerns. | ||
| View original record | SC. FROM DA/EV. C. to WOR. HS. C. to E. DA. SECRET ORIGINAL JAPAN 3. FRAME TIE-BARS I understand that it is suggested that we may be able to leave off the frame tiebars on Japan 3. While I am in… | ||
| Scan277 | Proposal to make modified, narrower side levers standard on the 20/25 chassis. | ||
| View original record | SG. FROM DA/EV. C. to - EY. HS. DA/EV4/M2.2.31. 20/25 - SIDE LEVERS. X5311. On 18-G-4. we bent the standard brake lever in over the gear lever, so reducing the width across the bulged portion of the… | ||
| Scan278 | The engine and performance characteristics of a Litre Bentley. | ||
| View original record | A. FROM E. C. to HS. re: LITRE BENTLEY. X 3805 Supplementing HS' report on the Bentley we attach herewith a print from a thumb nail sketch showing the external arrangement of the engine. The point one… | ||
| Scan279 | Flywheel vibration issues on the Japan 3 engine and proposing potential solutions. | ||
| View original record | HS. } FROM R. (At Le Canadel.) SECRET. R3/M3.2.31. x634 x5770 C. to SG. WOR. RG. C. to HY. RHC. JAPAN 3. ENGINE. [STAMP: ORIGINAL] E's temporary double rear bearing is good for a trial, but I think… | ||
| Scan280 | Cost of the 25HP anchorage and proposing a new forged design for the rear anchorage of front springs. | ||
| View original record | FROM DA. C. to CC. WOR. [Text Struck Through] C. to HS. BY. HY [Text Struck Through] SECRET. JAPAN 3. REAR ANCHORAGE OF FRONT SPRINGS. DAL/W3.2.31. x5410. Derby have complained on the score of cost,… | ||
| Scan281 | Secret memo detailing modifications for the Japan Rear Axle, specifically concerning the hypoid axle centre case and bearing adjustments. | ||
| View original record | RHC SECRET. DA2/W3.2.31. R. FROM DA. C. to SG. WOR. O. to HS. EY. JAPAN. REAR AXLE. X5350. ORIGINAL Herewith we send print of N. sch. 3206., unfinished drawing of the hypoid axle centre case. This… | ||
| Scan282 | With suggestions for the improvement of the Japan 3 gearbox design. | ||
| View original record | DA/EDX. FROM R. (At Le Canadel.) C. to SG. WOR. C. to E. RHG. HY. ORIGINAL JAPAN 3. GEARBOX. R1/M3.2.31. X5310 I am very pleased with this, but I think it can be made a little better by the following… | ||
| Scan283 | Suggesting design simplifications for a rear spring front anchorage. | ||
| View original record | DA. HS.) FROM R. BY. ) (At Le Canadel.) SECRET. C. to SG. WOR. C. to E. RHC. HY. JAPAN 3. REAR SPRING FRONT ANCHORAGE - N. SCH. 3201. [Handwritten: x5410. x7380.] If we are making new dies I think… | ||
| Scan284 | Gear lever length and spring modifications required for a Chrysler gearbox in a right-hand drive chassis. | ||
| View original record | HS. FROM DA. ORIGINAL DA5/M3.2.31. x2061. CHRYSLER GEARBOX. On the R.H. chassis the gear lever is necessarily shorter than on the Chrysler, or our own L.H. chassis. This will mean that we shall wish… | ||
| Scan285 | Performance of a Chrysler gearbox with Maybach jaws as an alternative to a new design. | ||
| View original record | HS. FROM DA. ORIGINAL DA2/W4.2.31. x2061. CHRYSLER GEARBOX. In view of the latest telegrams from R. re. gear change from the steering column etc, we think it is very important that we should know… | ||
| Scan286 | Secret memo outlining modifications for the 'Japan 3' engine, concerning the connecting rod bolts and cylinder head design. | ||
| View original record | A. FROM E. C. to SG. HORE C. to HS. HY SECRET JAPAN 3. ENGINE. x5770 We send you herewith further print of LeC. 2853., shewing certain modifications suggested by HY. and RHC. to facilitate production,… | ||
| Scan287 | Proposed design changes for various engine components, including tappets, crankshaft, and connecting rod nuts. | ||
| View original record | (2) (e) To avoid stopping up the waterway above the exhaust bend we have arranged a pocket for the stud hole to break into, and a groove to evacuate these pockets which should also help to feed the… | ||
| Scan288 | Design changes and sketches for valve gear pedestals and end cylinder studs. | ||
| View original record | (3) SPECIAL VALVE GEAR PEDESTALS. Derby would like the facings for the pedestals flush with the cyl. top to facilitate production. We have however shewn them level with the ribs to save weight since… | ||
| Scan289 | Design, weight, and features of a new Special Touring Saloon body. | ||
| View original record | EX. FROM DA/EV. C. to HS. C. to BY. CX/UN [Struck through] DA/EV1/M4.2.31. X51-0. SPECIAL TOURING SALOON. We send herewith N. Scks. 3211/12. shewing the body for the special touring saloon. After you… | ||
| Scan290 | Secret memo proposing an unfinished scheme for a JAP.A3 gearbox and its actuating mechanism. | ||
| View original record | FROM DA. C. to SG. PDR. C. to HS. BY. C. to HY. SECRET. JAP.A3. GEARBOX. Herewith we send unfinished scheme of the proposal for the actuating mechanism. The scheme is that of the latest epicyclic 3rd.… | ||
| Scan291 | On an example of double battery ignition for the Stutz 8 cylinder engine. | ||
| View original record | FROM E. C. to SG. [crossed out] C. to WOR. [crossed out] C. to HS. ORIGINAL [stamp] X.6105. BATTERY IGNITION. E1/M5.2.31. Further to memo. E1/M2231, we find another example of double battery ignition… | ||
| Scan292 | New battery arrangement to create space for new shock dampers. | ||
| View original record | R. FROM DA. SECRET. C. to SG. WOR C. to EH. HS:X6107JAPAN 3. BATTERY & SUSPENSION. C. to HV. Herewith we send print of N. sch. 3213. - Battery and Suspension. We wish to move the brake cables further… | ||
| Scan293 | The rear axle and brakes for the 'JAPAN 3' model, including scheme references and design considerations. | ||
| View original record | PY. FROM DA. C. to EG. WOR. C. to HS. HX. SECRET. JAPAN 3. REAR AXLE AND BRAKES. DA2/M5.2.31. X5350. X5360. Herewith we send N. schs. 3203/4/5. - Rear axle tube, brakes and operation. We have… | ||
| Scan294 | Secret memo discussing design modifications to the 'Japan 3' engine, focusing on connecting rod length, flywheel, and clutch assembly. | ||
| View original record | FROM E. G. to SG. WOR. C. to HS. PH. SECRET. JAPAN 3. ENGINE. LeC. 2853. ORIGINAL May we refer again to the above print sent with our memo. of yesterday in connection with the following points: (1)… | ||
| Scan295 | Design considerations for cylinder end studs, valve rocker cover, and sparking plug holes. | ||
| View original record | (2) ORIGINAL 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… | ||
| Scan296 | The progress and procedure for converting crankcases to a new 'Diamond Mounting' system. | ||
| View original record | X. FROM E. C. to EG. WOR. (Strikethrough) to MS. DW. [STAMP: RECEIVED 5 MAY] [STAMP: OFFICIAL] E3/M5.2.31. 87005 87000 P. 2. DIAMOND MOUNTING Please find attached print of LeC. 2873. dealing with the… | ||
| Scan297 | Design modifications and production considerations for the Japan 3 petrol tank. | ||
| View original record | K. FROM DA/EV. (Struck through) C. to EH. DOR. (Struck through) C. to Mr. HS. (Struck through) SECRET DA/EV3/W5.2.31. JAPAN 3. PETROL TANK. R2/M29.1.31. X5460. We feel that our N. schm. 3196/7. of the… | ||
| Scan298 | Arrangement and sourcing of dashboard controls and instruments for a chassis, including suggestions for suppliers. | ||
| View original record | SG. FROM DA. C. to WOR. E. C. to DY. HS. ORIGINAL SECRET JAPAN 3. - CONTROLS, INSTRUMENT BOARD, ETC. Referring to SG10/E4231., we have looked into the question of the arrangement of controls and… | ||
| Scan299 | Layout of controls and instruments for the 'Japan 3' project, with reference to a Humber chassis. | ||
| View original record | SECRET ORIGINAL SG. FROM E. C. to WOR. HS. C. to BY. DA/LV JAPAN 3. CONTROLS. Referring to your memo. SG10/E4231., we examined the equipment of the Humber with interest and fully agree that our own… | ||
| Scan300 | The policy and technical approach for supplying rear aprons for the P.2 model with a revised luggage grid. | ||
| View original record | SG. FROM DA/EV. (SG. is crossed out) C. to - HS. PI. (PI. is crossed out) P. 2. - REAR APRON FOR USE WITH TYPE 4. REVISED LUGGAGE GRID. [Stamp: ORIGINAL] We are not clear on the policy decided on… | ||
| Scan301 | Secret memorandum with a sketch discussing the design and production of a cast dashboard for the Japan III model. | ||
| View original record | TO HY. FROM EV. COPY TO HS. SECRET. CAST DASHBOARD. JAPAN III. We are making a design for the cast dashboard for Japan III, and are endeavouring to make it to machine mould. It will of course be of… | ||
| Scan302 | Flywheel vibrations, crankshaft deflection, and potential engineering solutions to improve engine performance. | ||
| View original record | [Header] E. FG. ) FROM R. HS. BY. ) (At Le Canadel.) Copy to - SG. WOR. HY. Copy to - EP. RMC. [Handwritten Note] Grys / LESLIE [Stamped] ORIGINAL [Categories] ENGINES GENERALLY. CARS IN PARTICULAR.… | ||
| Scan303 | Engine improvements, focusing on pins, webs, balance weights, and crankshaft vibration. | ||
| View original record | (2) We have from time to time increased the pins and not been altogether satisfied that they have made much improvement - i.e. the added weight has done as much harm as the increased stiffness has… | ||
| Scan304 | Engineering merits of a 12-cylinder engine, focusing on vibration, crankshaft design, and performance. | ||
| View original record | (3) Now you will see one reason why I am so very keen for a 12 cyl. engine, because as this will always run beyond the master period of 6 per rev. it can have balance weights of any extent that engine… | ||
| Scan305 | Steering and control configurations for various chassis types and markets. | ||
| View original record | SG. FROM DA/EV. C. to - HS. SECRET. JAPAN 3. STEERINGS. DA/EV1/M7.2.31. X5430. We are designing the dash, steering, and pedals, for the above car, which are to be so designed that the greatest… | ||
| Scan306 | Suggesting the acquisition and testing of a Lucas 3rd brush dynamo for comparison against their own model. | ||
| View original record | EFC. FROM E. C. to SG. WOR. HS. re. DYNAMOS. We are of the opinion that it would be worth while obtaining a standard Lucas 3rd. brush dynamo with a view to testing its output and analysing the machine… | ||
| Scan307 | Design of hydraulic dampers and front axle control. | ||
| View original record | DA. HS. ) FROM R. E. BY. ) (At Le Canadel.) C. to SG. WOR. C. to HY. RHC. OF HYDRAULIC DAMPERS. FRONT AXLE CONTROL. R1/M7.2.31. X235 I have all along fought for shorter levers, but the circumstances… | ||
| Scan308 | Design, placement, and patent considerations for dampers and relief valves. | ||
| View original record | (2) Experience has proved that we must place these dampers so that they are more accessible. I think the front ones on P. 2. were put inside because they would have r duced the lock - i.e. we did not… | ||
| Scan309 | Secret memo regarding modifications to the Japan 3 project's hypoid rear axle. | ||
| View original record | SECRET. FROM DA. C. to RHC. JAPAN 3. HYPOID REAR AXLE. ORIGINAL Herewith we send N. sch. 3206. - Rear axle centre casing. This is somewhat modified from the 25HP. because the larger axle shafts… | ||
| Scan310 | Use of rubber hoses versus pipe schemes for centralised chassis lubrication. | ||
| View original record | K. FROM DA. C. to EG. HS. C. to HY. HV. CENTRALISED CHASSIS LUBRICATION. Referring to R2/M3.2.31., Mr. Bijur some time ago acknowledged, after trying almost everything, that he had reluctantly come to… | ||
| Scan311 | The fitting of Delco hydraulic shock dampers to the L.H. American chassis. | ||
| View original record | HS. FROM E. ORIGINAL E1/M7.2.31. X832. L. H. AMERICAN CHASSIS. I happened to mention to SG. the idea of fitting Delco hydraulic shock dampers on the L.H. RR. for America, and it was unanimously agreed… | ||
| Scan312 | Engine design challenges for the Japan 3 engine, covering flywheel fixing, flexibility, and valve types. | ||
| View original record | E. HS.) FROM R. BY. ) (At Le Canadel.) SECRET. R2/M7.2.31. G. to SG. WOR. C. to RG. HY. RH. JAPAN 3. ENGINE. X5770. As regards the double bearing scheme and the difficulty of fixing the flywheel this… | ||
| Scan313 | Request for information from Messrs Luvax regarding centralised chassis lubrication methods. | ||
| View original record | . HS. FROM DA. ORIGINAL CENTRALISED CHASSIS LUBRICATION! DA3/M7.2.31. x3806. With reference to R2/M3231., it is rather difficult to get information on the methods of taking the lubrication on to the… | ||
| Scan314 | Secret memo regarding schemes for the Japan 3 gearbox and forthcoming modifications. | ||
| View original record | BY. FROM DA. C. to SG. WOR. [Strikethrough] C. to HS. HY. [Strikethrough] SECRET. ORIGINAL. JAPAN 3. GEARBOX. DA4/H7.2.31. X5310 Herewith we send N. schemes 3210/16/17/18. - arrangements of the… | ||
| Scan315 | Blueprint and assembly of a diamond suspension for a power unit. | ||
| View original record | HS. FROM E. C- to SC. WOR. DY. P. 2. DIAMOND SUSPENSION FOR POWER UNIT. ORIGINAL x-7005- We send you herewith blueprint of LeC 2875. shewing the sch. we have made for-a crossmember and front pivot in… | ||
| Scan316 | Secret memo regarding modifications to a drawing, including crankcase and con. rod dimensions. | ||
| View original record | COPY. FROM E. SECRET. E3/MLT.2.31. x5770 C. to SG. WOR. HS. JAPAN 3. -LeC. 2853. [STAMPED: ORIGINAL] We send you herewith the original of the above drawing shewing the modifications incorporated that… | ||
| Scan317 | The issue of the connecting rod big end no longer passing through the cylinder bore due to a crankpin diameter increase. | ||
| View original record | R/C. FROM E. C. to SC. R. WOR. C. to HS. PY. SECRET. JAPAN 3. CON. ROD BIG END. E2/W7.2.31. x5030. We notice that owing to the increase in dia. of the crankpin over the 25HP. the con. rod big end will… | ||
| Scan318 | Pros and cons of using subframes on car bodies, referencing PII and 20/25HP models. | ||
| View original record | TO SG. FROM EV. ORIGINAL EVI/E.2.31. COPY TO HS. RE SUBFRAMES. HS.I/M.J.5.3.31. Hs. I agree that we ought to reconsider the question of the subframe on PII. From time to time every thing on the car… | ||
| Scan319 | Secret memo regarding the JAP. J. valve rocker gear and cylinder head, circulating drawing LeC. 2864 for comments. | ||
| View original record | BY. FROM E. C. to SG. WOR. HS. C. to HY. RHC. SECRET. ORIGINAL JAP. J. VALVE ROCKER GEAR & DETAILS OF CYLINDER HEAD E2/M9.2.31. X 5090. X 5050. We attach herewith LeC. 2864. shewing the above. Would… | ||
| Scan320 | Technical memo detailing the design of the valve rocker gear and cylinder head for the 'Japan 3' engine. | ||
| View original record | SECRET. ORIGINAL JAPAN 3. VALVE ROCKER GEAR & DETAILS OF CYLINDER HEAD - Lec. 28 The above drawing completes and brings up-to-date the information with respect to the valve rocker gear and cyl. head.… | ||
| Scan321 | Design changes to cylinder block casting, specifically concerning boss features and inspection holes. | ||
| View original record | (2) ORIGINAL At the same time this form of boss deletes external moulding features which may be advantageous in the foundry. A limitation on the use of these expanded discs is as to whether the… | ||
| Scan322 | Design principles and challenges of shock dampers. | ||
| View original record | HS/RM. FROM R. (At Le Canadel.) R2/M10.2.31. x235. SHOCK DAMPERS. I want to warn us that we must not follow Lovejoy's without real reason. One cannot see any reason in some of the arrangements, but… | ||
| Scan323 | Technical discussion on valve design, shock dampers, and other chassis components. | ||
| View original record | (2) It is agreed that knife edge seatings are good for valves (replenishing) because less liable to get dirty, and large balls with small lift also good. I prefer vertical motion, but appreciate, and… | ||
| Scan324 | Design options for an engine front support, including diagrams. | ||
| View original record | E. HS.) FROM R. BY. ) (At Le Canadel.) C. to SG. WOR. C. to HY. RHC. P. 2. ENGINE FRONT SUPPORT. To suit existing cars, assuming we cannot get satisfaction unless we have central support at front end,… | ||
| Scan325 | Proposal to increase the thickness of the crankshaft flange and flywheel web to improve stiffness. | ||
| View original record | X. FROM E. C. to ES. WOR. [Struck through] C. to HS. DY. ORIGINAL *P. 2. FLYWHEEL. We find that the crankshaft flange and flywheel web on P. 2. are somewhat diaphragmish, being .3 and .275" thick… | ||
| Scan326 | Design schemes for a special touring saloon body on the 20/25 chassis. | ||
| View original record | K. FROM DA/EV. ORIGINAL DA/EV1/M10.2.31. C. to SG. HS. SPECIAL TOURING SALOON. X5120. We send herewith prints of N. schemes 3211/12., shewing a special saloon body on the present 20/25 chassis on the… | ||
| Scan327 | Communication regarding a revision to the lock nut adjustment for the crown wheel, referencing N. schemes 3206 and 3219. | ||
| View original record | R. FROM DA. C. to SC. WOR. [Strikethrough] C. to BY. HS. HY. SECRET. JAPAN 3. [Stamped with ORIGINAL] DA4/M10.2.31. 85380. On N. scheme 3206. we did not complete the suggested lock nut adjustment for… | ||
| Scan328 | Body specifications for the 'Japan 3' chassis and the use of experimental cars. | ||
| View original record | SG. FROM DA/EV. C. to WGR. HS. E. SECRET. ORIGINAL BODIES FOR JAPAN 3. DA/EVH/M11.2.31. Y5830, With reference to SG8/E3231., and HS2/KT7231., we are definitely of the opinion that the first Japan 3.… | ||
| Scan329 | Dynamo output, comparing a Lucas machine to an in-house model and suggesting improvements. | ||
| View original record | E/C. FROM E. C. to SG. WOR. C. to MR. HS. ORIGINAL. re. DYNAMO OUTPUT. E1/M11.2.31. X6100 X6099 In reply to your memo. EFC1/AD9231., I still think it would be useful to obtain one of the simpler Lucas… | ||
| Scan330 | Proposal to replace a special 'Paxon' air bag rear cushion with a spring cushion on an experimental car. | ||
| View original record | HS. FROM DA/EV. DA/EV3/MJ112'31. 84524. PARK WARD BODY ON 25-EX. In reply to HS/LID4/KTY9231., we remember that this car has a rear cushion of a special "Paxon" air bag covered with curled hair and… | ||
| Scan331 | The non-arrival of a scheme for the Humfrey-Sandberg clutch. | ||
| View original record | HS/RM. FROM DA. ORIGINAL DA4/M11.2.31. HUMFREY-SANDBERG CLUTCH. Referring to HS/RM2/KT9231., the scheme you mention has not arrived: possibly you meant you were sending it on afterwards. DA. RECEIVED… | ||
| Scan332 | Secret memo discussing revisions for the Japan 3 Gearbox, detailing alternative proposals for mounting the reverse wheel. | ||
| View original record | X. FROM DA. C. to ed. WOR. [Struck through] C. to SY. HS. SECRET. ORIGINAL [Stamp] DA1/N12.2.31. +5310. JAPAN 3. GEARBOX. Herewith we send print of N. sch. 3222., shewing certain parts of the gearbox… | ||
| Scan333 | Operation of the main reserve fuel system from the dash instead of the main tank. | ||
| View original record | SG. FROM E. & DA. C. to WOR. HS. re. RESERVE. E2/M12.2.31. x5460 In reply to your memo. SG6/E11.2.31., we think there are no serious difficulties in operating the main reserve on the dash instead of… | ||
| Scan334 | Suggested letter to Mr. Pye regarding compression ignition engine development and research. | ||
| View original record | [Stamp: DERBY 21 FEB 1931 WILK!X] RG. HS. ) FROM R. ) (At Le Canadel) [Stamped: ORIGINAL] R1/M14.2.31. C. to SG. WOR. COMPRESSION IGNITION. SUGGESTED LETTER FROM R. TO MR. PYE. x4433 Owing to some… | ||
| Scan335 | Engine design ideas, including injection timing, pumps, and a proposed two-stroke cycle. | ||
| View original record | ORIGINAL (a) Not nozzles. (b) Not quantity of fuel. (c) Only to a limited extent turbulence and distribution of fuel and air. (d) But time of injection because when somewhat late to keep down the… | ||
| Scan336 | Brief memo regarding the despatch of a Chrysler gearbox by train. | ||
| View original record | HS. FROM DA. ORIGINAL DA7/M14.2.31. x2061 We have despatched the Chrysler gearbox to you by passenger train today. DA. | ||
| Scan337 | Optimal placement of toolboxes in a car for weight distribution and accessibility. | ||
| View original record | HS. - C. ) FROM R. BY. DA. E. ) (At L[...] E.P. P.N.) C. to SG. WOR. EP. PN. ORIGINAL TOOLBOXES. R2/M14.2.31. x7580. With reference to Mr. Hives' and Mr. Cowen's remarks re. the above, there are… | ||
| Scan338 | Design scheme for a front suspension with diamond mounting. | ||
| View original record | A. FROM E. C. to SG. WOR. C. to HS. EH. rme. ORIGINAL E2/M14.2.31. P. 2. FRONT SUSPENSION FOR DIAMOND MOUNTING. x7005. The scheme with side arms for the above - LeC. 2873. - was not in the final form… | ||
| Scan339 | Modifications to the front anchorage of the rear springs and its oiling system. | ||
| View original record | -R. FROM DA. C. to SC. WOR. C. to HS. - BY. [Struck through] ORIGINAL [Stamp] J.3. FRONT ANCHORAGE OF REAR SPRINGS. DA1/M14.2.31. X5410, [Handwritten] With reference to R2/M3.2.31., we send herewith… | ||
| Scan340 | Design and materials for the 'Japan 3' brake differentials, referencing scheme 3215. | ||
| View original record | K. FROM DA. C. to SG. WOR. C. to HS. BY SECRET ORIGINAL JAPAN 3. BRAKE DIFFERENTIALS. DA2/M14.2.31. x5360 It is suggested that we should use at any rate the same gears on both foot and hand brake… | ||
| Scan341 | Schemes for a side lever mechanism for the epicyclic 3rd speed gearbox. | ||
| View original record | FROM DA. C. to HS. DA3/M14.2.31. X731D. SIDE LEVERS - EPICYCLIC 3rd. SPEED GEARBOX. We send herewith N. schemes 3220/21, shewing the side lever mechanism for use with the epicyclic 3rd. speed gearbox… | ||
| Scan342 | The completion of an epicyclic 3rd speed gearbox and its associated controls. | ||
| View original record | FROM DA. C. to CG. WOH. C. to DY. HS. ORIGINAL P. 2. EPICYCLIC 3rd. SPEED GEARBOX. DA4/M14.2.31. *7310. We had completed the epicyclic 3rd. speed gear with the exception of the gate and levers, and… | ||
| Scan343 | Two proposed modifications to the Japan 3 engine concerning the combustion chamber and crankpin. | ||
| View original record | FROM E. G. to SS. WDR. C. to HS. BY. HV. SECRET ORIGINAL JAPAN 3. ENGINE. E1/M16.2.31. x577o Please find herewith print of LeC. 2875. shewing two modifications. The first is in connection with the… | ||
| Scan344 | Covering note for the original document LeC. 2874 regarding balance weights. | ||
| View original record | BY. FROM E. C. to NED. RECEIVED 4 FEB 1931 ORIGINAL E4/M16.2.31. E x7010. P. 2. BALANCE WEIGHTS. We send you herewith the original of LeC. 2874., shewing the above. E. | ||
| Scan345 | Scheme for balance weights on the Phantom engine. | ||
| View original record | FROM E. C. to HS. BY. P. 2. BALANCE WEIGHTS. Please find herewith LeC. 2874. shewing the scheme for four balance weights for the Phantom. We have shewn the balance weight held on with two studs as you… | ||
| Scan346 | Design and issues of a spring-loaded piston for P. 2. and 25HP shock dampers. | ||
| View original record | R. FROM DA. C. to SG. WDR. C. to HS. BY. HY. ORIGINAL P. 2. AND 25HP. SHOCK DAMPERS. x7520. x5520. Herewith is print of M. scheme 3225. - Spring loaded piston for use with existing P. 2. rear shock… | ||
| Scan347 | Design for a spring-loaded piston for rear dampers. | ||
| View original record | NORMAL LOAD 9.4" REBND CHAMFER CORNERS HARD BRONZE OR C.I. MAX BUMP NITRO HARDEN .325" 1490 LBS FOR 200 LBS AT 13" RAD. MAX REBND. 130 LBS AT NORMAL LOAD POSN 30 LBS H.P. L.P. .250 NUTS RIVETED ON FOR… | ||
| Scan348 | Analysing the sources of engine vibrations and body resonance, focusing on torsional variations and compression ratios. | ||
| View original record | HS. E. ) FROM R. BY. DA/EV ) At Le Canadel. to SG. WOR. ORIGINAL R1/M16.2.31. K634. K7830. C&H 23 FEB 1931 P.2. VIBRATIONS. ENGINE SOURCES & BODY RESONANCE. We are still somewhat in doubt about the… | ||
| Scan349 | Engine vibration, mounting systems, and methods for reducing torsional vibrations. | ||
| View original record | (2) Now our P. 2. mounting seems very inefficient for this purpose, and the diamond mounting the most efficient we know. Rubber is self damping and results should be better than the earliest attempt… | ||
| Scan350 | Analysis of engine vibrations, focusing on torsional periods, flywheel whirl, and potential improvements. | ||
| View original record | (3) and we should have to endeavour to make the slipper flywheel more efficient. The master period being 3 per rev. and somewhere about 3600. - i.e. 10,800 per min. would shew on our indicator at this… | ||
| Scan351 | Engine vibration issues such as torque reaction, over-run, and flywheel whirl, and proposing potential solutions. | ||
| View original record | (4) Item (4) according to Mr. Grylls calculations would have very little effect but item (5) might do good, but would not save the bearings, and therefore is inferior to item (1), but otherwise much… | ||
| Scan352 | Engine choices, chassis stiffness, vibration, and body construction, including a diagram of frame stiffening. | ||
| View original record | (5) I have explained elsewhere how all these troubles either do not exist or can be more easily dealt with in the 12 cyl. Vee engine which we ought to push on with. The double top will do some good as… | ||
| Scan353 | Torque reaction, torque arm placement and flywheel whirl, with a comparison to Bentley. | ||
| View original record | (6) It will be noticed that one period is about 800 X 3 per rev. = 2400 - i.e. torque reaction, and the high one 65/70 MPH. probably 1 per rev. = 2500 revs. For several years I have thought that the… | ||
| Scan354 | Car weights, the reliability of data, and the role of coachbuilders in influencing total vehicle weight. | ||
| View original record | SC. FROM DA/EV. C. to WOR. HS. C. CAR WEIGHTS. [STAMPED: S06/C6.2.31. ORIGINAL] [STAMPED: FEB 1931] DA/EV1/M17.2.31. [Handwritten: 87840. x4538. x26] It appears that our information regarding the… | ||
| Scan355 | Competitor accessories from Barker's and the need to gather comparative weight data for various cars. | ||
| View original record | ORIGINAL (2) Messrs Barker's have a large engineering dept. created originally to produce dipping lamps for Morris Oxford cars (which contract Lucas' now have). They are anxious to keep it occupied… | ||
| Scan356 | New spring-loaded piston for shock dampers and inquiring about production status. | ||
| View original record | HS/RM. FROM DA. RECEIVED 1931 FEB ORIGINAL DA1/M18.2.31. x7520. P.2. SHOCK DAMPERS. With reference to your recent memo. on the above, we have completed a spring loaded piston suitable for use with an… | ||
| Scan357 | Design assumptions, material proposals, and questions regarding car bonnets. | ||
| View original record | SG. ) FROM DA/EV. SC. ) C. to BY. WOR. ORIGINAL. re. BONNETS. DA/EV1/M19.2.31. We are assuming that the following are accepted facts: (1) That nothing be done for 20/25 bonnet. (2) That it is not… | ||
| Scan358 | Design and mock-up of the bonnet, radiator, and dash for the 'Japan 3' model. | ||
| View original record | ORIGINAL SG. [crossed out] FROM DA/EV. C. to BY/CGH. [crossed out] HS. H. [crossed out] JAPAN 3. BONNET, RADIATOR & DASH. DA/EV2/M19.2.31. x 5260. x 5250. x 5500. We have not received a copy of… | ||
| Scan359 | Various control schemes and alternatives for an epicyclic 3rd speed gearbox. | ||
| View original record | FROM DA. C. to SG. WGR. [Text Struck Through] C. to EY. HS. HT. ORIGINAL [Stamped] P. 2. EPICYCLIC 3rd. SPEED GEARBOX - CONTROLS. Herewith we send print of N. sch. 3226., unfinished scheme of the… | ||
| Scan360 | Modifications and criticisms of a hydraulic damper design. | ||
| View original record | DA. HS. FROM R. (At Le Canadel.) [Text struck through: C. to SG. WOR.] [Text struck through: C. to E. BY.] re. HYDRAULIC DAMPERS. [Handwritten: X255.] [Stamp: ORIGINAL RECEIVED 25 FEB 1931] HS/RM.… | ||
| Scan361 | Design of an axle system, focusing on hydraulic pressure, glands, lubrication, and component fitting. | ||
| View original record | (2) ORIGINAL. We do not quite agree but after this speed of say 60 at 4" there should be as little increase in ball pressure as possible so as not to get excessive forces on the parts when the axle is… | ||
| Scan362 | Investigation of vibrations in Phantom cars, their periodicity, and methods for testing. | ||
| View original record | E. HS. FROM R. (At Le Canadel.) C. to SG. WOR. C. to PN. RHG. VIBRATIONS - CAR ENGINE x634 BALANCE WEIGHTS, ETC. x7300 x5300 So far we cannot come to any satisfactory conclusion of the real nature of… | ||
| Scan363 | Typed memo discussing engine design choices and issues, comparing Phantom I and P.2 models, focusing on flywheel and crankshaft dynamics. | ||
| View original record | (2) ORIGINAL It should be understood that P. 2. crankchamber, though lighter, is stiffer, and therefore, as far as I know, would have a higher period than P. 1. There should be no difference in the… | ||
| Scan364 | Observations on the difficulties and potential remedies for a Maybach dog clutch gearbox, with diagrams. | ||
| View original record | SECRET ORIGINAL TO HS. FROM DA/HDY? COPY TO SG. WOR. E. BY. RE MAYBACH DOGS. X3531 X2200 OBSERVATIONS With regard to HS2/MJ.I8.2.31. and HS/Rm's. proposed trial of a Maybach Car we give below some… | ||
| Scan365 | Gearbox design considerations including transmission flexibility, clutch operation, and gear selection safety for the Phantom model. | ||
| View original record | (2) ORIGINAL Flexibility in the transmission may be the solution. Salerni insisted on a partial engagement of the clutch for this reason. (4). The "klonk" due to the dogs shooting home can be easily… | ||
| Scan366 | Flywheel modifications for Phantom experiments, specifically the need for a lighter and stiffer design. | ||
| View original record | HS. Z.) FROM R. P.Y. ) (At Le Canadel.) C. to SG. WOR. ORIGINAL R3/M23.2.31. x634 x7300. LIGHTER & STIFFER FLYWHEEL FOR PHANTOM EXPERIMENTS. Mr. Grylls says in his memo. that they proposed placing the… | ||
| Scan367 | Issues with shock dampers, springs, and potential replacements like the Delco-Lovejoy model. | ||
| View original record | HS. DA. FROM R. (At Le Canade) C. to SG. WOR. C. to F. BY. RECEIVED 27 FEB 1931 ORIGINAL R2/M23.2.31. x235. x832. x7520. x7520. SHOCK DAMPERS. Under the conditions of bad roads we do not like the 10"… | ||
| Scan368 | Comparison of lever and shaft designs, including an evaluation of a Delco damper. | ||
| View original record | (2) (4) The levers in these models are about 7.5" long. We are working with 13". It would seem that we must get down to 10" and some limit on rebound. (5) When we made ours we had no thought of 100 to… | ||
| Scan369 | Two proposed schemes for improving shock dampers, focusing on increased stiffness. | ||
| View original record | DT. FROM DA. [DT. is struck through] C. to SG. WOR. [Struck through] C. to HS. HY. P. 2. SHOCK DAMPERS. DA5/M23.2.31. X7520 [Handwritten] ORIGINAL [Stamped] Herewith is N. sch. 3229. scheme for the… | ||
| Scan370 | Original schemes for controls of a 3rd speed epicyclic gearbox. | ||
| View original record | BY. FROM DA. C. to SG. WOR. (crossed out) C. to HS. Mr. ORIGINAL P. 2. EPICYCLIC 3rd. SPEED GEARBOX. Herewith we send the originals of N. schs. 3226/7/8., as requested in your telegram this morning.… | ||
| Scan371 | Revision to the engine front suspension, referencing a blueprint and pivot pin fixing methods. | ||
| View original record | RECEIVED FROM E. C. to SG. WOR. (struck through) C. to HS. DY. (struck through) Date Stamp: 1931 FEB 24 ORIGINAL P. 2. ENGINE FRONT SUSPENSION. Please find herewith a blueprint of LeC. 2876., shewing… | ||
| Scan372 | Potential improvements to car 18-EX, specifically addressing torque reactions and flywheel vibration. | ||
| View original record | HS. FROM R. (At Le Canadel.) C. to SG. C. to RG. C. to DA. re. CHINA 4. VISIT TO LE CANADEL. 18-EX. ETC. I am not expecting to see any drawings about China 4. unless there are some drastic changes,… | ||
| Scan373 | Modifications to the 'Maybach dogs' on an epicyclic 3rd speed box to prevent a clicking sound. | ||
| View original record | RV.) FROM DA. DA4/M23.2.31. HS.) ORIGINAL C. to SG. WOR. HY. MAYBACH DOGS. X 2200. 87310. Herewith we send N. sch. 3230. shewing the modifica- tions to the dogs on the epicyclic 3rd. speed box which… | ||
| Scan374 | Design of a double piston shock damper, with diagrams. | ||
| View original record | DA/HDY.) FROM R. HS/RM. ) (At Le Canadel.) DY. C. to SG. WOR. E. ORIGINAL SHOCK DAMPERS. The double piston that I suggested is not so good or simple as the Delco design because it demands a long close… | ||
| Scan375 | Design specifications and alternatives for various mechanical components. | ||
| View original record | (2) ORIGINAL If this die was broached with the same broach as the lever the parts would fit and naturally be tight; if not it could be arranged. We should never expect to take out pistons or shaft… | ||
| Scan376 | Damping control, competition, and a design for a broach for fine serrations in an internal lever. | ||
| View original record | ORIGINAL. It would seem that we are drifting away from needing my sch. for damping control but it might be wise to keep it going on some model because if at all good it would be a fine selling point,… | ||
| Scan377 | Review of servo and speedometer drives, with feedback on helical gears, reverse gears, and the P.2. gearbox. | ||
| View original record | DA. E. ) FROM R. DY. HS. ) (At Copy to SG. WOR SECRET. JAPAN GEARBOX. R2/M25.2.31. X5310 RECEIVED 1931 MAR - 3 ORIGINAL I have received the servo and speedometer drives and I cannot see any means of… | ||
| Scan378 | Design and production considerations for hydraulic dampers. | ||
| View original record | DA/HDY.) FROM R. HS/RM. ) (At Le Canadel.) BY. ) C. to SG. WOR. E HYDRAULIC DAMPERS. x235. I think we ought to know what we intend to make for our general production. It must be one model for both… | ||
| Scan379 | Design improvements for a mechanical component, including details on serrations, bearings, and materials. | ||
| View original record | (2) Since writing the last para. I have schemed that we might make the back bearing blind and of large dia., say 1.1, the fine parallel serrations 1.25 and the front bearing 1.1, so that even if the… | ||
| Scan380 | Car vibrations, crankshaft weight, balance weights, and flywheel design. | ||
| View original record | HS.) FROM R. E.) (At Le Canadel.) C. to SG. WOR. C. to RG. DY. CAR VIBRATIONS. CONCERNING Mr. GRYLLS MEMO. To the weight of the crankshaft should be added the weight of all the other parts - i.e.… | ||
| Scan381 | Observations on the re-design of horizontal type hydraulic dampers, discussing pistons, valves, and oil/air separation. | ||
| View original record | R. FROM DA/HDY. Copy to - HS. ORIGINAL HYDRAULIC DAMPERS. DA/HDY1/M26.2.31. X238- With reference to R1/M7.2.31., and the proposed re-design of the horizontal type dampers we give below our… | ||
| Scan382 | Damping chassis motion, rebound, and front axle control, referencing road test data. | ||
| View original record | (2) DAMPING OF SLOW CHASSIS MOTION AT HIGH SPEED. It appears to us that with a damper of the uniform load type whenever the velocity of the axle vibrations is greater than that of the chassis on its… | ||
| Scan383 | Issues and proposed solutions for exhaust manifolds. | ||
| View original record | S.L. FROM E. [S.L. is crossed out] C. to R. WOR. C. [crossed out] C. to EY. HS. PN. ORIGINAL EXHAUST MANIFOLDS. x7-230 x52-30 We agree that the question of exhaust manifolds requires serious… | ||
| Scan384 | Improvements to manifolds, including material changes and the addition of cooling ribs. | ||
| View original record | ORIGINAL As regards P. 2. we were not aware that this was giving trouble but in view of your memo. we are including this in the programme of improvement. The first P. 2s. were fitted with manifolds… | ||
| Scan385 | Design memo with diagrams discussing the construction of hydraulic dampers, particularly the valves and drilling. | ||
| View original record | DA/HRF ) FROM R. DS/RM. BY. ) (At Le Canadel.) Copy to SG. WOR. F. R1/M26.2.31. X235 RECEIVED ORIGINAL HYDRAULIC DAMPERS. (CONTINUED.) X235 We must do something very quickly and the simplest thing we… | ||
| Scan386 | Mr. Grylls' work on 12-cylinder engines and comparing them to Maybach and Lion engines. | ||
| View original record | HS. E.) FROM R. BY. ) (At Le Canadel.) Copy to SC. WOR. ORIGINAL. X634 R2/M26.2.31. 12 CYL. CAR. Mr. Grylls has worked hard, and to the point, in adding up the virtues of 12 cyls. at different angles… | ||
| Scan387 | Flywheel vibrations and a proposed ball bearing scheme. | ||
| View original record | HS. FROM DA. ORIGINAL P. 2. FLYWHEEL VIBRATIONS. DA3/M27.2.31. x634-. As suggested by you we send herewith a print of N. sch. 3236., a very preliminary scheme of ball bearing at the back of the… | ||
| Scan388 | Design of shock dampers, proposing a 4-stud cover over other methods. | ||
| View original record | DA/HDY ) FROM R. HS/RM. ) (At Le Canadel.) RY ) C. to SG. WOR. E. ORIGINAL R1/M27.2.31. SHOCK DAMPERS. (CONTINUED.) x2 35. After thinking for a long time weighing the value of screwed plugs, ring… | ||
| Scan389 | Modifications to a flywheel to make it lighter and stiffer, including material changes and bolt configuration. | ||
| View original record | ORIGINAL FROM E. C. to BG. WOR. C. to HS. DY. P. 2. LIGHTER & STIFFER FLYWHEEL. E1/M27.2.31. X7010. 8300. Regarding your recent memo. with reference to the above, the stiffer crankshaft flange and… | ||
| Scan390 | Engine vibrations and proposing a new mounting system to counteract wobbles and jellying. | ||
| View original record | R. FROM DA/EV. C. to S̶G̶. H̶S̶. re. VIBRATIONS. ORIGINAL TA/EV1/M27.2.31. x634 From deductions and tests it appears that what is known as "diamond mounting" will isolate the engine vibrations from… | ||
| Scan391 | Sketch of an engine mounting system, detailing the movement of links due to engine torque and frame torsion. | ||
| View original record | A B CANTILEVER PIN ON FRAME ENGINE ARM RUBBER THIS SHEWS HOW THE LINKS MOVE DUE TO FRAME TORSION. IF BOLT B IS REMOVED. THESE MOVE UP & DOWN TOGETHER DUE TO TORSIONAL ENGINE MOVEMENT ABOUT THE… | ||
| Scan392 | Body booming, vibrations, and potential engine mounting solutions. | ||
| View original record | HS. -E. ) FROM R. R1/M28.2.31. DY. DA/EV.) (At Le Canadel.) WOR. P. 2. BOOMING OF BODIES. x634 x7830. [STAMP: RECEIVED, 1931 MAR 5, H.S.] The accumulation of evidence from the many trials the Expl.… | ||
| Scan393 | Chassis torsional stiffness, body-induced vibrations, and the necessity of well-designed dampers. | ||
| View original record | (2) various ways, but results suggest that no good is found unless the engine assists in the torsional stiffness - i.e. helps to prevent twisting of the complete frame. I have telegraphed that we… | ||
| Scan394 | Telegram copy suggesting obtaining a Maybach chassis to test several car bodies on it. | ||
| View original record | To Sg. from Wor. m H R He. [REDACTED] Dy. Wor2/T.28.2.31. X3531 We give below copy of telegram received from R. 27th inst. at 6.7 p.m.. "SUGGEST OBTAINING MAYBACH CHASSIS ONLY WE TRY SEVERAL OF OUR… | ||
| Scan395 | Modified engine mounting design using bell cranks and a push/pull rod for an anti-jellying scheme. | ||
| View original record | [strikethrough]A.[/strikethrough] FROM E. C. to SG. [strikethrough]WOR.[/strikethrough] C. to HS. [strikethrough]DA/EV.[/strikethrough] ORIGINAL E2/M28.2.31. X457 X7005. re. ENGINE MOUNTINGS.… | ||
| Scan396 | The arrangement of the twin battery ignition system and a proposed change to the H.T. moulding cap pattern. | ||
| View original record | FROM E. C. to SG. WOR. C. to HS. DY. SECRET ORIGINAL E4/M28.2.31. JAPAN 3. TWIN BATTERY IGNITION. X1109 In arranging the position of the oil pump and battery ignition drive we have had to take a… | ||
| Scan397 | Friction drive and assembly of the cone mounting for the flange on the Japan 3 engine. | ||
| View original record | K. FROM E. (K. is struck through) C. to SG. WOR. (SG. WOR. is struck through) C. to HS. BY (BY is struck through) SECRET ORIGINAL JAPAN 3. - REAR END OF ENGINE. Please find herewith a print of LeC.… | ||
| Scan398 | Secret memo discussing design schemes for the front-end suspension of the 'Japan 3' engine. | ||
| View original record | FROM E. C. to SG. WOR. [WOR. is struck through] C. to HS. RV [RV is struck through] SECRET. E3/M28.2.31. x5005 x5770 JAPAN 3. SUSPENSION OF ENGINE AT FRONT END. In your memo. referring to the above… | ||