Rolls-Royce Archives
| Identifier | Entry | ||
| Scan0 | Testing and failures of rear shock absorbers, specifically issues with bolts stretching and levers working loose. | ||
| View original record | R R. 235 A (100 T) (S.F 846 6-8-19) G. 2460 ORIGINAL To P From Hs. C. to CS. C. to EH C. to DA C. to ST C. to IH C.R. Hsl/LG2. 2.20. 4 X.3461. RE REAR SHOCK ABSORBERS. X.3443 X.1331 We are running a… | ||
| Scan1 | Continuation page of a memorandum discussing split springs and friction. | ||
| View original record | Contd. -2- Hs1/LG2.2.20. **************** the split springs we may be able to do with much less.friction. Hs. | ||
| Scan2 | Investigation into the protection of the Lucas E.575 dynamo and battery by using fuses in the dynamo circuits. | ||
| View original record | To R. from Ck 1/2 c. to CJ. c. to E. c. to Bn. c. to EP. c. to Da. ORIGINAL X.3014 - PROTECTION OF LUCAS E.575 DYNAMO (AND BATTERY) BY FUSES IN DYNAMO CIRCUITS. We have made a further investigation of… | ||
| Scan3 | Investigation into minimum fusing currents and the testing of a new distribution board with a Lucas switchbox. | ||
| View original record | Contd. -2- Ckl/T3.2.20. It will be seen from the above that the minimum fusing currents of any fuses which can be used must be approximately as follows :- Field 4.5 amps. Control. 20.0 amps. Main… | ||
| Scan4 | Investigation into dynamo control and negative circuit fuse capacities under various running conditions. | ||
| View original record | Contd. -3- does not affect the results of the investigation, which was actually carried out using the 12 ampere wire for the control and negative circuits. The results of this investigation were as… | ||
| Scan5 | Technical note on the behavior and protection of the dynamo with different fuse configurations. | ||
| View original record | Ck1/T3.2.20. -4- Contd. smaller larger than occurs in normal running and will, therefore, do no harm, so that good protection is afforded. (5). Running with battery disconnected, with main negative… | ||
| Scan6 | Investigation into dynamo protection and fuse behavior under different temperature conditions. | ||
| View original record | Contd. -5- Ckl/T3.2.20. B. Protection of the dynamo should at any time the cutout stick on with the dynamo stopped and the charging switch be left on. Investigation under this head was carried out by… | ||
| Scan7 | Continued discussion on the effectiveness and capacity of fuses in main negative, control, and field circuits. | ||
| View original record | Ckl/T3.2.20. -5- Contd. both the main negative and control fuses may fail to go. It will be seen, giving due consideration to the fact that the fuses used in the investigation were only of 12 amperes… | ||
| Scan8 | Wiring diagram with annotations and explanatory text regarding the circuit's fuse functionality. | ||
| View original record | Contd. -7- Ck1/T3.2.20. as indicated in diagram - [Handwritten note next to component H]: cut out [Diagram annotations]: A, Fuse, H, C, c, +, -, 7 [Handwritten note pointing to a switch]: positive… | ||
| Scan9 | Analysis of fuse configurations for electrical circuit protection, including a diagram for a four-contact switch. | ||
| View original record | Contd. -8- Ckl/T3.2.20. Such a fuse in combination with a field fuse would appear to give the best and most complete protection to the whole system. The use of such a fuse would involve altering the… | ||
| Scan10 | Continuation page of a report discussing dynamo disadvantages and various fuse protection configurations. | ||
| View original record | -9- Contd. Ckl/T3.2.20. small capacity (less than 15 amperes). It has a further disadvantage that the dynamo will still charge the battery after the fuse has gone, but with an unsatisfactory… | ||
| Scan11 | Table of current measurements and calculations for a Lucas E.575 Dynamo. | ||
| View original record | X. 294 - LUCAS E.575 DYNAMO X. 3034. Table of currents (Handwritten note for the last three columns: brush currents) Speed. | Main current (M) | Field current (F) | Control current (C) | Main + ve… | ||
| Scan12 | Examination and testing of a new distribution board, with recommendations for improvement. | ||
| View original record | To R. from Ck. c. to CJ. c. to E. c. to Bn. c. to Da. c. to Hs. ORIGINAL Ck1/T7.2.20. X.3555 - R.R. DISTRIBUTION BOARD We have examined and tested the first R.R. distribution board made by the… | ||
| Scan13 | The design and safety of the electrical fuse system, with suggestions for improvements. | ||
| View original record | Contd. -2- Ck1/T7.2.20. (4). The main negative and control fuse holders are somewhat near together, making it rather difficult to securely catch hold of the control fuse holder for the purpose of… | ||
| Scan15 | Modifications to the 20 HP valve gear arrangement based on drawing LeC.1201. | ||
| View original record | To EA. from E. Copy to C.J. " " BN. " " HS. " " CK. ORIGINAL. 5 X3210 Re 20 H.P. VALVE GEAR. X3586 We send you herewith drawing No. LeC.1201 giving an arrangement of the above. The camshaft drive… | ||
| Scan18 | The testing and modification of two types of motor-car heaters, one American and one English. | ||
| View original record | To R. from Hs. c. to CJ. c. to EN. c. to E. c. to Da. c. to OY. c. to Na. X3924 HEATERS - EXH ORIGINAL. HS4/LG12.2.20. RE MOTOR-CAR HEATERS. We have tested two types of these Heaters; both of them… | ||
| Scan19 | Comparison and analysis of the 'Thermorad' and 'Perfection' car heaters, detailing disadvantages and design features. | ||
| View original record | Contd. -2- Hs4/LG12.2.20. impinge direct on to the surface of the heater. With this heater, we found that it would get up to 60 or 70°C with the car running under traffic conditions. If the car was… | ||
| Scan20 | Comparison and conclusion on 'Thermorad' and 'Perfection' exhaust heaters, with suggestions for design improvements. | ||
| View original record | Contd. -3- Hs4/LG12.2.20. traffic conditions. The heater itself gets to a temperature of 80°C. The heater is more efficient than the "Thermorad" because in the case of the "Thermorad" while the bottom… | ||
| Scan21 | Incorporating a heater system valve into the exhaust, noting explosions in the silencer. | ||
| View original record | Contd. -4- American chassis) of a branch from the exhaust system where the pipe for the heater can be connected up. If in that scheme we incorporated the valve, then there is nothing hardly left to be… | ||
| Scan23 | Difficulties encountered when fitting new type rear shock absorbers and proposing solutions. | ||
| View original record | To / From HS. C.K. ORIGINAL. 2 Hal/LG24.2.20. X.3461 NEW TYPE REAR SHOCK ABSORBERS. We find a certain difficulty in fitting shock absorbers to existing cars even when they are despatched with the… | ||
| Scan24 | Satisfactory fixing of a shock absorber lever following a design modification. | ||
| View original record | Contd. -2- hsl/LC24.2.20. ============== We find that the fixing of the shock absorber lever by means of a square and biting-in-bolt is working satisfactorily on the bump test since we have made the… | ||
| Scan25 | Visit with the Hawk-Northcliffe chassis, potential changes to the 20 HP back axle, and the decision to proceed with a twelve-cylinder engine. | ||
| View original record | [Header] TO EN. } (crossed out) DA. } from R. (crossed out) HS. } (crossed out) Copy to Jd. (crossed out) PH. X.37 (crossed out) [Handwritten top center] 6, 8 or 12 CYLINDERS - PORLEX (crossed out)… | ||
| Scan27 | Excessive duty on shock dampers and proposing a new serrated fixing for the lever. | ||
| View original record | To HS. from R. Copy to C.I. " " DM. " " BR. " " CK. X.3461 RE SHOCK DAMPERS. ORIGINAL 3 R2/04/2/20. With reference to shock dampers, it is quite evident that the duty we are making them do is too… | ||
| Scan28 | On unsatisfactory thermometers and routing crankchamber fumes for the 40/50 HP chassis. | ||
| View original record | To BN. from R. Copy to CJ. " " HS. " " DR. (crossed out) " " BY. (crossed out) ORIGINAL. R9/G4/2/20. 6 D 5/3/20 X.3431 X.3463 X.3565 X.3563 RE PRESENT 40/50 H.P. CHASSIS. With reference to the present… | ||
| Scan29 | Requesting a modification to the water temperature regulator on the 40/50 HP chassis to aid in draining. | ||
| View original record | To BA. from E. Copy to CJ. [struck through] " " BN. [struck through] " " HS. [struck through] " " CK. X.3563 ORIGINAL. E1/G5/2/20. 3 RE WATER TEMPERATURE REGULATOR. 40/50 H.P. CHASSIS. When it is… | ||
| Scan30 | Proposal to experiment with venting engine breather gas directly to the open air via a pipe through the undershield. | ||
| View original record | To HS from E. Copy to CO. BH. S. A. W. CK. ORIGINAL. E3/G5/2/20. 4 CK. X.3908. RE BREATHER GAS FROM ENGINE. X.3431 X.3908 It is proposed to carry the breather gas straight into the open air by means… | ||
| Scan31 | Specifications and dynamometer test results for the Owen Magnetic Car. | ||
| View original record | To R. from hs. c. to CJ c. to H. c. to R. c. to Da. c. to EY. c. to EP. C.K. ORIGINAL x.3636 OWEN MAGNETIC CAR. Particulars of Car. Engine 6-cylinder 3.75" bore 5.5" stroke. D headed engine.… | ||
| Scan32 | Report page detailing dynamometer test results comparing electrical and mechanical spur gear reduction systems. | ||
| View original record | Contd. -2- HAL/LG6.2.ED. will be seen from the figures that we could not measure any appreciable slip in the magnetic clutch. We then made a test on the dynamometer - running the engine at 1000 revs.… | ||
| Scan33 | Road test report on a car with a magnetic clutch and electrical control, detailing performance and issues. | ||
| View original record | Contd. -3- On a standard R-R car we always obtain more power on the gears than we do on the direct drive due, I suppose, to the tyre losses on the dynamometer. Road Tests. With a clever driver it is… | ||
| Scan34 | Road test report page detailing the advantages and disadvantages of a car's performance, focusing on the electrical system and drive. | ||
| View original record | R R. 235 A (100 T) (S.F 846 6-8-19) G. 2460 -4- Hs1/L06.8.20. ---------------- Contd. a lot of sparking at the generator brushes when running on the low gears. We tried the car again up the hill and… | ||
| Scan35 | Impracticality and poor fuel consumption of a car, questioning whether to keep or replace it. | ||
| View original record | Contd -5- Hsl/LG6.2.20. =========== We think that the fact of having to keep the engine running slowly and no braking, is not as practical as the present car. The average consumption of this car on… | ||
| Scan36 | Poor efficiency of the Owen-Magnetic car, recommending its disposal. | ||
| View original record | To HS. from R. Copy to CJ. " " BN. " " DA. X.3636 ORIGINAL. R3/G9/2/20. RE OWEN-MAGNETIC CAR. Since you determine that the efficiency of the Owen-Magnetic car is so very low, and proved that the… | ||
| Scan37 | Poor efficiency of the Owen Magnetic car and recommending its prompt disposal. | ||
| View original record | H.R. 235A (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. [Handwritten annotations] OWEN MAGNETIC - Poor inefficient Get rid of it quickly as possible R o Hs R. [Typed distribution list] TO Hs from R. Copy… | ||
| Scan38 | Confirming the sending of drawing LeC.1200 for the 20 HP starter motor switch. | ||
| View original record | To BA. from E. Copy to GS. (struck through) " " BN. (struck through) " " HS. (struck through) " " CK. ORIGINAL E1/G7/2/20. X.3915. RE 20 H.P. STARTER MOTOR SWITCH. We send you herewith drawing No.… | ||
| Scan39 | Altering the steering box and shaft for the 40/50 HP chassis, proposing a continuous shaft design. | ||
| View original record | To - BA. from R. Copy to G.I. HN. HW. CR. ORIGINAL. D R1/69/2/20. 3 X.3920 RE STEERING BOX AND SHAFT - 40/50 H.P. CHASSIS. With reference to DA1/CBS/2/20, I think it would be better not to call this a… | ||
| Scan40 | Requested modifications to a car's distribution board, focusing on fuses, insulation, and component layout. | ||
| View original record | To HS. } from R. CK. } Copy to CJ. " " DN. " " DA. ORIGINAL X 3535 RE R.R. DISTRIBUTION BOARD. X.285 As soon as convenient you might arrange to let me have a car here with an R.R. distribution board,… | ||
| Scan41 | Protection offered by fuses, fuse wire size, and requesting a modified sample distribution board. | ||
| View original record | To HS. & CK. from R. -2- R5/G9/2/20 Contd. not believe any fuses will give the protection desired, but certainly CK. can arrange these if possible, and he thinks desirable. With regard to the last… | ||
| Scan42 | Issues with gauze in petrol strainers, suggesting the sulphur content in benzol is the likely cause. | ||
| View original record | TO BN. from R. Copy to C.J. " " DA. " " HS. " " HL. X.3701 " " CK. ✓ ORIGINAL 11 FEB 1920 R2/G9/2/20. 2 RE GAUZE FOR PETROL STRAINERS. With reference to gauze for petro, strainers, my impression at… | ||
| Scan43 | From 'R.' proposing a scheme for the brake differential countershafts on the 20 HP chassis. | ||
| View original record | To BA. from R. Copy to CJ. " " DN. " " HS. " " CK. ORIGINAL X3568 RE BRAKE GEAR - 20 H.P. CHASSIS. Referring to the brake gear of the 20 H.P., it will be found that there is very little choice as… | ||
| Scan44 | Serious issue with dynamo connections and awaiting a resolution from Lucas. | ||
| View original record | 30.6.20 To BN. from R. Copy to CJ. " " CK. " " DY. ORIGINAL R3/G11/2/20. (4) 12 FEB 1920 X3014 RE DYNAMOS. X3220 About a fortnight ago we sent you some pieces from the car dynamo. They have not been… | ||
| Scan45 | Instruction from Mr. Royce to change the bevel gear ratio for the 'Vulture' rear axle to 4.75 to 1. | ||
| View original record | ORIGINAL. D 4 EL/G12/29 19.FEB 1920 To HA. from E. Copy to Co. BN. HS. CK. X.3843. RE "VULTURE" REAR AXLE. I am desired by Mr. Royce to inform you that the ratio of the bevel gears for the Vulture… | ||
| Scan46 | Drawing Lec.1203 for the Goshawk water outlet pipe and radiator anchorage. | ||
| View original record | To DA. from E. Copy to CJ. BN. HS. CK. X.3586 ORIGINAL [STAMP] 16 FEB 1920 RE WATER OUTLET PIPE AND RADIATOR ANCHORAGE - GOSHAWK. E2/G14/2/20. 3 We send you herewith drawing No. LeC.1203 shewing the… | ||
| Scan47 | Water suction pipe and bonnet side rests for the 'Goshawk' engine. | ||
| View original record | To DA. from E. Copy to CJs. " DN. " HS. " " CK. ORIGINAL. D 5 16 FEB 1928 E1/G14/ X 3581 [crossed out] X 3561 RE WATER SUCTION PIPE - "GOSHAWK". We send you herewith drawing Lec.1198 shewing the… | ||
| Scan48 | Advantages of a new 3.5 to 1 back axle ratio and urging its standardization. | ||
| View original record | To HS. from R. Copy to CJ. " " BN. " " WOR. ORIGINAL. X.3545 X.3457 RE BACK AXLE. X.3612 I think all of us have agreed for a long time that at least a small increase in the back axle ratio would be a… | ||
| Scan50 | Recommendation to replace solid eyes with rolled eyes for the rear road springs on the 40/50 HP chassis. | ||
| View original record | To DA. from E. Copy to CJ. BN. HS. CK. X.2628 RE ROAD SPRINGS. ORIGINAL. D 2 Would you kindly note that Mr. Royce considers it unnecessary to use solid eyes for the rear springs of the 40/50 H.P.… | ||
| Scan51 | Instructions from Mr. Royce regarding the design and lubrication of the shock damper for the 40/50 HP chassis. | ||
| View original record | To DA. from E. Copy to CJ. BN. HS. CK. ORIGINAL. E1/G17/2/20. X.3912 RE SHOCK DAMPER - 40/50 H.P. CHASSIS. With reference to N. scheme 249, would you kindly note that Mr. Royce would like you to… | ||
| Scan52 | Request for a progress report on the two electrical machines for the 20 HP dynamo and motor. | ||
| View original record | To CK. from E. Copy to CJ. " " BN. " " HS. " " DA. X.3533 X.3534 ORIGINAL E3/G18/2/20. RE 20 H.P. DYNAMO AND MOTOR. Would you kindly report to Mr. Royce how the two electrical machines for the 20 H.P.… | ||
| Scan53 | Design discussion on split aluminium pistons for the 40/50 HP chassis, focusing on cone shape and ring placement. | ||
| View original record | To D.H. from E. COPY to Col. " " CK. X.3924. ORIGINAL. RE SPLIT PISTON IN ALUMINIUM FOR 40/50 H.P. CHASSIS. With reference to drawing No. N.3510, would you kindly note that Mr. Royce agrees to the use… | ||
| Scan54 | Starting motor support for the 'Goshawk' engine, referencing drawing LeC.1145. | ||
| View original record | To DA. from E. Copy to CJ. " BN. " HS. " CK. ORIGINAL RE STARTING MOTOR SUPPORT - "GOSHAWK". X.3936 We send you herewith drawing No. LeC.1145 shewing the above. Would you kindly instruct the necessary… | ||
| Scan55 | Relaying Mr. Royce's approval of a piston design from drawing N.359, with a requested alteration to the longitudinal saw-cut. | ||
| View original record | ORIGINAL. D TO DA. from E. [strikethrough]Copy to Ed.[/strikethrough] [strikethrough]* * DN.[/strikethrough] [strikethrough]* * HS.[/strikethrough] [strikethrough]* * CK.[/strikethrough] X.3539 RE… | ||
| Scan56 | The steering position and pedal mechanism for the 'Buzzard' and 'Vulture' models. | ||
| View original record | To DA. from E. Copy to CJ. " " BN. " " MS. " " CK. ORIGINAL. E1/G23/D20. 24 FEB 1930 6 X.3929 X.3930 X.3931/2 RE "BUZZARD" AND "VULTURE" STEERING POSITION AND PEDAL MECHANISM. We send you herewith… | ||
| Scan57 | Request to experiment on the minimum revolutions for the Goshawk engine magneto. | ||
| View original record | To HS. from E. Copy to CJ. " " BN. " " CK. ✓ ORIGINAL. E2/G25/2/20. 2 X.3534. RE MAGNETO FOR "GOSHAWK" ENGINE. In accordance with Mr. Royce's wishes, would you kindly make an experiment to determine… | ||
| Scan58 | Instructions for timing the 'Goshawk' engine, referencing drawing Lec.1124 and necessary modifications. | ||
| View original record | To EH. from E. Copy to EH. * CK. ORIGINAL. D 27 FEB 1930 x.3481' x.3942' RE INSTRUCTIONS FOR TIMING "GOSHAWK" ENGINE. We send you herewith drawing No. Lec.1124 on which the problem of timing the… | ||
| Scan59 | 'Condor' engine's reliability and performance for the International Motor-Boat Race. | ||
| View original record | To CJ. from R. Copy to BH. " " HS. " " DA. __________ X.3782. RE INTERNATIONAL MOTOR-BOAT RACE. __________ As regards to our responsibility to the Nation, I am informed that our "Condor" engine is the… | ||
| Scan60 | Engine reliability, revs, and compression, with a request for suggestions on figures to offer. | ||
| View original record | To CJ. from R. -2- R1/G27/2/20 Contd. I do not think, however, it is necessary to run it at less than 1500 revs. or to use much lower compression, but these are the directions in which one would… | ||