Rolls-Royce Archives

Rolls-Royce Experimental Archives: Box ExFiles\Box 183\M22\        Box Selection

IdentifierEntry
img001 Notification regarding the completion of assembly for chassis 1. E+X.
View original record RHC1/LG30.6.19. RE CHASSIS 1. E+X. The above chassis is now complete and it has been assembled as follows:- "G" SECTION. S.S. No. ✓ X.3458. Rear Hub and Brake G.6383. X.3425. Foot Brake Adjustment.…

img002 Notes from a visit with Mr. Royce detailing his preferences for wheels and specifications for dynamos and switchboards.
View original record R.R. 235A (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. Handwritten notes: x. script 424 HS & WOR VISIT RR at NN Broad sheef/u for Post War 40/50 Electrics DYNANOS - ELECTRICS 4-LH Typed content: Extract…

img003 Index of topics from a conference on proposed experimental work and design alterations.
View original record Handwritten notes: // Include POST-WAR ELECTRICS - POLICY; TENTATIVE BROAD SPEC DECISIONS R SUGGESTS INCREASE IN 1'ST ATN BATCH SIZE ABOVE 500 Typed text: COPY To R. from E. Copy to TBB. " " DA. " "…

img004 Aero engine flight tests, car production programs, radiator design, and battery ignition systems.
View original record To R. from E. -2- E1/G30119 Contd. (1) OBSERVATION OF AERO ENGINES ON ACTUAL FLIGHT TESTS It is considered necessary for R.R. services testers to go up in the air with machines. Mr. Royce says certain…

img005 Ignition, lighting, battery, and chassis fuel feed systems.
View original record To R. from E. -3- E1/G30119 Contd. It should be made certain that the high tension rotor contact on the distributor is late, and the tail sufficiently long to avoid the danger of firing the engine in…

img006 Discussion of an air valve mechanism, an anti-theft gear lock, valve gear covers, and foot warmers.
View original record To R. from E. -4- E1/G30119 Contd. mechanism. He further suggests using only one air valve, which would shut off a little intermediate chamber from which the engine driven pump was sucking, as shown…

img007 Decisions on foot warmers, fenders, luggage carriers, and starting handles.
View original record To R. from E. -5- EL/G30119 Contd. Mr. Royce approved of the suggestion to leave a union of about .625" diameter on the exhaust pipe for this purpose. Mr. Olley will make enquiries as to what foot…

img008 Formation of tool boxes using valances and a rack and pinion method for controlling body windows.
View original record To R. from E. -6- El/G30119 Contd. mounting or dismounting from the car. This outside valance in combination with the inside valance, supplies a convenient means of forming tool boxes on those cars…

img009 Adopting a new type of piston and the required alterations for engine lubrication.
View original record 7CA a 49 GB PISTONS, RINGS X140 OIL CONTROL U & Y. Value filed on SC11/84 159 To Wor. for EH. } from R. RG/IB12515. " E. Copy to J. " " EP " " Na. May 12th. 1915. Re Pistons. ---------- According to…

img010 Engine oiling, scraper rings, and the use of Zephyr pistons.
View original record To EH & E.} from R. C.S. 2. R6/IB12515. With reference to the suction in the cylinder having no effect on the oil passing the piston, I am quite willing to agree with Mr Hives' experiments, although…

img011 New cast iron piston design, its advantages, and potential fitment to car 49GB.
View original record To EH & E. from R. 3. There will, however, be a fresh one to be made in cast iron exactly like those tested in the aero engine, but with the piston pin in the correct position. Such a piston will suit…

img012 Extract from a report on chassis No. 7-CA concerning its poor road-holding capabilities.
View original record R.R. 295 A (400 T). (S.C. &C. 19-2-16) G. 1346. 7CA & 49GB R14/W9916. September 9th 1916. EXTRACT FROM RE CHASSIS NO 7-CA. X.424 HOLDING THE ROAD. The springing of this car was most supple, and the…

img013 Typed note expressing disapproval of large road wheels for a chassis.
View original record -2- I certainly do not like these large road wheels and think they would be a decided disadvantage to the chassis, on account of this and other reasons given on other occasions.

img014 Report discussing fuel and oil consumption, with suggestions for experiments on the Post-War Chassis.
View original record (R) 49GB X.3056 X.2565 - Post-War Chassis. -10) c' 194 R6/W3.10.16. Contd. (28) X.3056. Fuel Consumption. Earlier in this description I have suggested that a slow moving air valve is advantageous for…

img015 Performance testing of a Packard car for comparison with an 'After-the-War' chassis.
View original record To EH. from R, c. to J. X.3056 7CA PACKARD R7/B/23.5.17. X.682 - RE "AFTER-THE-WAR" CHASSIS X.435 When the Packard was in Derby, I presume it was never put on the dynamometer, or I should have…

img016 Comparison of engine power curves using different carburettor and induction pipe setups.
View original record 7CA To R. from EH. c. to J. " " E. " " By. " " EP. X.3071 X.3056 EH1/AT6.6.17. X.682 - RE 7 C.A. CAR H.P. X.3071 X.2751 X.2758 X.2786 Below are power curves obtained from the engine for this car:-…

img017 Continued report on carburettor testing, induction pipe configuration, and fuel consumption improvements.
View original record Contd. J2) induction pipe the other way up so that any raw petrol instead of running into the first cylinder will have to be lapped up. It was noticeable on the standard pipe that the 2 centre…

img018 On the road performance of car 7-CA, detailing its speed and fuel consumption.
View original record 7 CA ROAD PERFORMANCE MUCH BETTER THAN SML 40/50 IN LINE WITH HIGH ENGINE POWERS OBTAINED ON TEST-BED. EH2/AT11.6.17. To R. from EH. c. to J. c. to By. c. to E. X.682. RE 7-CA CAR. X.3056. We have run…

img019 The petrol consumption of the 7-CA car at various speeds.
View original record X.3056 7CA c/ 196 Extract from EH6/LG10.7.17. X.682. 7-CA CAR. 66 X.3056. With reference to the petrol consumption on this car Mr. Platford has run this car for a long run. The consumption when going…

img020 Road test and performance comparison between car models 7-CA and 49-GB from Derby to West Wittering.
View original record X.3056 7CA & 49GB To R. from EH. c. to CJ. EH3/LG30.5.19. X.692. X.2631. X.3056. Mr. Wormald and I had an excellent run back to Derby on 7-CA. We arrived here about 4 p.m. The car came very well…

img021 Requesting information on the composition and properties of the metal Invar and other alloys.
View original record To EPC. from R. Copy to CJ. " " Mr. Hall. X 3404 RE "INVAR". ORIGINAL There is a metal called "Invar" which has a temperature coefficient expansion of practically nil. I have one or two applications…

img022 Requirements and specifications for a dynamo system on a 4½ inch car engine.
View original record From R. copy to G. W. EH. X.794 X.3014 ORIGINAL 11th November, 1918. R6/G111118.F 7CA RE DYNAMO FOR 4½" CAR ENGINE. As far as I can remember, the best we have installed for a convenient speed, and…

img023 Comparing different car dynamo systems for efficiency, weight, and power output.
View original record To EFC. from R. Copy to EH. " " BY. " " BJ. ORIGINAL RE CAR DYNAMO. 11th November, 1918 R12/G111118. X. 3231 X. 3014 X. 3374 (1) I do not think the system adopted by Rotax, Leitner, Lucas, and others,…

img024 Lamp testing failures, the suitability of half-watt lamps, and the responsibility for reducing accessory weight.
View original record To EFC. from R. -2- R12/G111118 Contd. X.3362 (7) The first lamp we tried of those you sent, failed by blackening in 7 1/2 hours, the next one is shewing no deterioration after 32 hours. (8) Re (4)…

img025 Proposed features for a new standard car model for the post-war period.
View original record TO E.M. :) E.H. :) Copy to C.S.J. " E.F.C. from R. ORIGINAL. 20th November, 1918. 6 R5/G201118. 21 NOV 18 X. 2565 X. 3014 RE NEW MODEL OF PRESENT STANDARD CAR FOR "AFTER THE WAR" M.T. Other nos X.…

img026 Modifications for the post-war 40/50 HP chassis, specifically regarding back axle tubes.
View original record MODS TO POST WAR 40/50 7CA ORIGINAL! from R. 26th November, 1918. RA/G261118. S.D. RECEIVED 27 NOV 1918 RECEIVED X.2565 RE 1000 - 40/50 H.P. CHASSIS. X.682. I expected before now that we should have…

img027 Design details for bevel gears, transmission, and brakes.
View original record To BY. from R. -2- R4/G261118 Contd. The actual radius need not be to an exact dimension but we must be careful to avoid square corners, and "digging in" of turning tools. There are other points about…

img028 Wheel and brake designs, recommending Michelin disc wheels over Dunlop wire wheels.
View original record To HY. from R. -3- R4/C261118 Contd. to fit the aluminium brake shoes, as is used by the Panhard people. I believe one of these has fractured on test, but it is a point which can be easily…

img029 Modifications to a cross steering tube and a stub axle, including design improvements to prevent failures.
View original record To BY. from R. -4- R4/G261118 Contd. cross steering tube has resulted in the modification being made, which was sent to you on LeC.537. Be sure to include this modi-fication in the chassis under…

img030 Technical memo detailing design specifications for road springs, pistons, and valves.
View original record To BY. from R. -5- R4/G261118 Contd. wheel carefully formed, and polished with fine emery cloth. (8) ROAD SPRINGS. X. 2628 . X 1295 X! Regarding the road springs, I have written about these recently.…

img031 Modifying ignition gear, the use of condensers, and the poor quality of trembler coils.
View original record To HY. from R. -6- R4/C261118 Contd. valve springs have been broken through the valve motion jumping the cams. (11) IGNITION GEAR. X 3129. We understand that Mr. Clark is modifying the six-cylinder…

img032 Modifications to coils and the possibility of adding an extra condenser for existing cars.
View original record To EY. from R. -7- R4/C261118 Contd. confirmed by recent observations of purchased coils. It will be remembered that there are modifications to these coils which should be embodied in all coils coming…

img033 Carburation and petrol consumption tests on car 49-GB, comparing pre-war and post-war petrol quality.
View original record X3056 49GB To R. from EH. c. to CJ. c. to E. cx to By. EH7/LG4. 2.19. X.2631. - TESTS ON 49-GB. - X.2768. X.2784. X.3056. We have been carrying out several tests on 49-GB with the carburation. We…

img034 Effects of fitting a blind to the radiator and the use of aluminium versus cast iron pistons.
View original record Contd. -2- We think that fitting the blind to the radiator on our cars is very urgent. We suggest that the fact of fitting aluminium pistons makes the running of the engine under cold conditions more…

img035 Car test run in cold weather, detailing the effects of increased engine temperature on performance and fuel consumption.
View original record To EH. from R. c. to CJ. c. to EP. c. to JCR. COPY. ✓ c 13th. March 1919. RL/G13.3.19. X.682 X.3056 ✓ X 3456 TCA 199 RE: CAR 7-SA. I had occasion to use the big car the other day when the temperature…

img036 Radiator modification and discussing the performance benefits of an extra water jacket on car 7-CA.
View original record To H. from R. Car 7-CA (2) H/C13.3.19. 269 suggest that we fit on the inside of the radiator, next to the fan, a complete piece of ply the full size of the radiator with a round hole in the centre the…

img037 Consumption test report for a 40/50 chassis at various speeds.
View original record To R. from EH. c. to CJ. c. to En. c. to E. c. to Da. X 3056 49-GB X.3056. CONSUMPTION TEST ON A 40/50 CHASSIS AT VARIOUS SPEEDS. X.2631. These tests were taken on 49-GB. The engine is similar to the…

img038 The supply and use of new K.L.G. spark plugs for chassis X.1918.
View original record 7 CA - R/c CAR BEFORE 1 EX To R. from EH. c. to CJ. c. to Ch. c. to E. c. to BY. c. to Da. ORIGINAL. EH2/LG14.5.19. 14th. May 1919. RE SPARKING PLUGS FOR CHASSIS. X.1918 We are sending to you 12…

img039 From Mr. Royce regarding a seized brake cable fork on chassis 7 CA, with suggestions for improvements.
View original record R's P's POST WAR EXP CAR 7 CA. X.3458 E6/G1.8.19. To EH. from E. c. to OJ. c. to Bn. c. to Da. c. to By. c. to EFC. _ _ _ _ _ _ _ _ _ _ _ _ _ _ X.682. RE 40/50 H.P. CHASSIS BRAKE CABLE FORKS. X.3458.…

img040 Testing of a low-geared back axle and proposals for further tests.
View original record X.3056 49GB To R. from Hs. c. to CJ. c. to Bn. c. to E. c. to Da. c. to EP. Hs3/LG12.2.20. X.2631. - RE LOW GEARED BACK AXLE. X.3056. X.3545. We are running on 49-GB an axle with a 15 toothed pinion…

img041 Advantages of lower axle gear following tests on car 49 GB at Brooklands.
View original record To HS. from R. Copy to G.O. " " E.W.H. " " EPC. ORIGINAL RE TESTS CARRIED OUT ON 49 GB AT BROOKLANDS. We are interested in the Brooklands test of the speed shewing the advantage of the lower axle…

img042 Test data sheet recording car performance, including acceleration, flying start, and lap speeds under various conditions.
View original record 49 G.B Test No. | Condition of car | Compression | Acceleration 10 to 60 MPH top gear | 1/4 mile Flying start. | Lap speed. ---|---|---|---|---|--- | | | axle ratio. 15 x 52 | axle ratio. 16 x 52 |…

img043 Comparison of car speeds based on different axle ratios and tyre sizes for 40/50 models.
View original record R.R. 199 (250T) (SD676 19-7-17) MP18c865 5 To R. from Hs.✓ a. to CJ. b. to BN. c. to E. c. to DA. c. to PN. c. to H. ORIGINAL HsL/LC30.6.20. AXLE RATIOS, 40/50. The pre-war Cars when fitted with a 16…

img044 400-mile test run of chassis 1.E.X, detailing engine performance, vibrations, and fuel consumption.
View original record X 3058 Bn - 400 MILE TEST RUN ON 1 EX. En5/W28.7.19. contd. -6- Chassis 1.E.X. Consumption~~~~~~~~~~~~~ with the water boiling. With so much boiling the top of the radiator got very dirty with the…

img045 The success of a new car model, highlighting an issue with piston knock when the engine is cold and discussing potential causes and solutions.
View original record R PRAISES 'MODEL' FOR PWW1 PROD CARS 'A GREAT X 740 SUCCESS' EXCEPT FOR PISTON KNOCKS(COLD). R ASKS - BCD? COMPARES 7 CA KNOCKS. To EH. from R. c. to CJ. c. to EN. c. to DA. c. to BY. c. to EFC RE CAR…

img046 Solutions for piston knocks and oiling issues.
View original record PISTON KNOCKS & OILING MAINLY / EX To EH. from R. -2- R3/G21.8.19 crankchamber has oil of sufficient body, we would like the surfaces of the pistons to become oiled before the engine is put under…

img047 Continued report on engine piston performance, compression, and lubrication.
View original record Contd. -3- R3/G21.8.19. succession. This depended on speed only. I noticed that 1 EX. was particularly tight in compression, shewing that the pistons and valves held the gas extremely well. I am very…

img048 Extract detailing tests on engine oiling, consumption, carbon deposits, and experiments with modified pistons.
View original record R.R 225. 100 T. 147. 518. 16-4-19? G. 254. X.3056. 1EX Extract from EHL/LG20.9.19. X.3437. X.3056. OILING. As regards oiling, we have run 1. EX with the extra oil on the whole time; we have had no…

img049 Modifications to the battery ignition system and the effects on engine running.
View original record To ER. from R. Copy to Gds EH ORIGINAL / EX RE BATTERY IGNITION. X3129 X3713 X3714 X1812 On Friday we changed the postion of the coil to close to the distributor, and substituted a wooden trough for…

img050 Ignition faults due to sooty plugs, comparing mica and porcelain types, and recommending better quality petrol.
View original record To BN. from R. -2- R4/G1/11/19 Contd. in the ignition may result in an improvement. The faults I have seen have only been capable of being met by changing the plugs to clean ones, and therefore…

img051 Refitting of chassis 49 GB with newly standardised parts, comparing its suitability with chassis 1 EX.
View original record To EH. from R. Copy to CJ. " " BN. ORIGINAL. R3/G12/11/19. 5 RE CHASSIS 1EX AND 49GB. X 2665 X 2631 X 3558 When you have refitted 49 GB, this car, which is not saleable, would suit my purpose as well…

img052 Expressing frustration over delays in modifying the battery ignition wiring arrangement.
View original record TO BN. from R. Copy to CJ. " " BY. " " DA. " " CK. " " HS. R - RESENTS 'SCRAGGY LOOK' IGN WIRING ORIGINAL D R7/G8/12/19. R-RAMPANT Ref R4/31/1/19 X3129 RE BATTERY IGNITION. X3713. X-3714. X 939 I hope…

img053 Improvements to electrical wiring arrangements by using smaller, neater wires and enclosing them in tubes.
View original record UNTIDY ELECTRICAL WIRING. R's EXASPERATION 1 EX ORIGINAL LEADS (ULTIMATELY) TO FULL ENCLOSURE IN ALUM CONDUITS. R - RAMPANT To BN. from R. c. to CJ. c. to Da. c. to BY. c. to Wor. c. to Hs. c. to PD.…

img054 Dissatisfaction with the quality of electrical work and finish on a model chassis.
View original record R5/G8.12.19. -2- Contd. any harm. I must say that in some respects the works have not done what I expected in this electrical work in regard to completing and fitting up neatly the model chassis, i.e.…

img055 Investigation into ignition failure, concluding with the necessity of using wide spark plug gaps for battery ignition systems.
View original record To BN. from R. Copy to CJ. " HS. " CK. " PN. " FP " HM. ORIGINAL X.3129 RE BATTERY IGNITION. Handwritten notes: X.3445 X.3763 X.3413 X.1812 On 1 EX. it was observed that the ignition failed on one of…

img056 Improvements to engine ignition systems, specifically spark gaps and coil windings.
View original record TO BN. from R. -2- R1/G30/12/19 Contd. metal tube for the conductors, because it has been determined that doing this allows of a fairly considerable increase in the length of the spark gap on the…

img057 Positioning of the starter switch and the construction of the ignition coil.
View original record To CK. from R. Copy to CJ. " " BN. EL STARTER SW BATT IGN ORIGINAL COIL CONST(N R2/G7/1/20. 1EX S ->EX X3129 RE BATTERY IGNITION ETC. X3768 X3445 X3034 STARTER SWITCH. - On lEX. the starter switch is…

img058 Decision to revert to pinned valve tappets for the 40/50 HP chassis to reduce noise.
View original record TO DA. from E. Copy to C. a BN. a OY. a EFC. ORIGINAL 1EX DA2/G20/11/19. X.3733. RE PINNED VALVE TAPPETS. 40/50 H.P. CHASSIS. shewing the above We send you herewith drawing No. LeC.118A, in…

img059 Sale of an experimental car and the specifications for a replacement vehicle.
View original record EFC D ORIGINAL RECEIVED APR 6 7 1920 7 APR 1920 RE EXPERIMENTAL CAR FOR WEST WITTERING OF 40/50 H.P. TYPE. X.3918. Mr. Hives suggests that 1 EX. be sold, as it now contains no parts which are not…

img060 Blown fuse failure on chassis 1EX, critiquing the reliability of Lucas fuses and switches.
View original record To EFC. from R. Copy to CJ. [STAMP] 1EX ORIGINAL [STAMP] 10 JUN 1920 [STAMP] RECEIVED [REFERENCE] 1 EX9 [REFERENCE] R13/GS/8/20. [HANDWRITTEN] X37434 RE CHASSIS 1 EX [HANDWRITTEN] X3129 X3749…

img061 Incorrectly fitted junction box lid on the 40/50 HP chassis, causing intermittent electrical faults.
View original record To EPC. from E. Copy to CJ. " " BM. " " HS. " " DA. " " BY. ORIGINAL 1 EX 6 E1/G14/6/20. x 1804 RE Junction BOX - 40/50 H.P. CHASSIS. x 37636 The distribution box lid on chassis 1 EX. can be put on in…

img062 'singing' noise issue with dynamos and slack bearings.
View original record To EFC. from R. Copy to CJ. " " HS. x.294 ORIGINAL. RE DYNAMOS. x.3014 (V. NOISY) DYNAMO & CUTOUT 1 EX Regarding the singing of the dynamos, we feel certain that this gets worse in time, possibly due…

img063 Overhaul and engine oil change for chassis 1 EX.
View original record R GIVES PARTING "CAREFULL OVERHAUL" ORIGINAL. To HS. from E. Copy to OJ. E8/G6/8/20. X.3763 RE 1 EX. X.1583 Kindly note that the engine of chassis 1 EX. was emptied and refilled with "Castrol" before…

img064 300-mile road test report and performance evaluation of a car, including details on speed, tyres, and handling.
View original record R, on 1 EX: THE BEST CAR I HAVE EVER HAD ORIGINAL. To Hs. From R. c.c. De. c.c. Co. c.c. T.N. 9GFC R24/H10.8.20. X 3263 RM 1.EX. I have run this 300 miles and I am very pleased with it; from every…

img065 Typed memorandum detailing various car maintenance issues and proposed solutions.
View original record contd. -2- You will remember I strongly advocated well pumped tyres for Isle of Man TT. 1906, to get low petrol consumption. X 607 & V 20146 (X3763G) The battery is good, but probably low, as dynamo…

img066 Test driver's report on the performance of the 1.EX experimental car after a 300-mile run.
View original record R.R. 199 (250T) (SD676 19-7-17) MP 18.865 PWW1, 40/50 R's FIRST REACTIONS TO 1EX. (SECOND TIME ROUND?) R24/H10.8.20. To Hs. from R. c. to Da. c. to CJ. c. to PN. X.3763. re 1.EX. I have run this 300…

img067 Modifications carried out on car 1.EX and arranging its exchange with car 6.EX at West Wittering.
View original record Handwritten top: R to CHANGE 6NEXO for 1 EX @ WW. NOW MODIFIED. NEW, IMPROVED, LUCAS DYNAMO, SWITCHBOARD, 6-RING PISTONS, SPRING INTERLEAVING, SOLID (NOT SPLIT) BOTTOM REAR LATEST SHOCK ABSORBERS.…

img068 From Mr. Royce to C.J. evaluating the performance of the 1.EX experimental car after a 2,000-mile test run.
View original record Ro GENERAL EVALUATION 1EX COPY OF MEMORANDUM FROM MR. ROYCE. To CJ. from R. R1/G26.9.20. My dear CJ., X.20. X.3056. X.3763. X.3628. X.4050. X.3491. X.2565. RE PRODUCTION CARS. I have just completed my…

img069 Improving ride comfort through tyre selection, suspension adjustments, and axle ratios.
View original record Contd. -2- What has been said of roads can also be said of tyres. Pleasant riding cannot be obtained without Pneumatic tyres, and these must be allowed to deflect with the load. Moreover, like the…

img070 Performance of a car with a Hawk aero engine and suggestions for improvements.
View original record Contd. -3- nearly I found R.R. Cars, all in the country travelling at higher speds than we usually supposed judging by the slow and silent way they are mostly driven in towns and villages. X. 108. So…

img071 Cause of an engine thud due to a loose cylinder block and arranging for new parts to be fitted.
View original record Handwritten Text: 1 EX'S DULL THUD. HS TELLS R NOW DUE TO FRONT CYL BLOCK NUTS BEING LOOSE (HONEST CONFESSION) THERMOSTAT & NEW SERRATED MAG DRIVE TO GO ON 1EX HS PROPOSES TO BRING TO WW 20-10-30 &…

img072 'thud' from a loose cylinder block and a parts list, written over an upside-down typed memo.
View original record Handwritten Text: THE THUD process to a loose cyl. block. (some nuts & a cum. alidade.) R I'EX Fitting H & T - Thermostat Hs Coming & WW. 30-10-20 bringing - { Locking ignition switch { New Dist…

img073 The performance improvements of a 14/52 axle ratio.
View original record ORIGINAL /EX re/JH To H. from Hs. C. to C.I. C. to E. C. to W. C. to D.A. C. to F.H.S C. to M. X4299 X3763 14/52 AXLE RATIO. We are running an axle fitted with 14/52 gears. The axle is good as regards…

img074 Distributing horsepower curves for the standard 40/50 engine with high and low compression.
View original record PROD 40/50 POWER CURVES HIGH & LOW C/R To R. from Hs. c. to CJ. c. to BN. c. to E. c. to Dn. c. to BY. c. to EP. c. to PN. c. to EWT. for R.R. Inc. ORIGINAL Hs2/LGS. 5.21. HORSE POWER CURVES OF…

img075 Performance graph displaying M.E.P. & Torque curves from Bench and Dynamometer tests.
View original record 100 300 90 270 80 240 BENCH TEST - CUT OUT OPEN. M.E.P. & TORQUE CURVE. BENCH TEST. CUT OUT CLOSED. M.E.P. & TORQUE CURVE. DYNAMOMETER TEST. CUT OUT OPEN. M.E.P. & TORQUE CURVE.

img077 Blueprint graph of engine performance curves showing Horse Power, Torque, and M.E.P.
View original record HORSE POWER 40 120 TORQUE & M.E.P. 50 150 FT. LBS. 60 180 (LBS. PER SQ. INCH) DYNAMOMETER TEST. CUT OUT CLOSED. M.E.P. & TORQUE CURVE. BENCH TEST - CUT OUT OPEN. H.P. CURVE. BENCH TEST - CUT OUT…

img078 Graph on blueprint paper showing performance data for different axle and tyre configurations against speed.
View original record AXLE 16 x 52 Back Axle 15 x 52 Back Axle 14 x 52 (TYRES) MILES PER HOUR. 35 40 45 50 55 60 65 70 75

img079 Blueprint graph showing performance curves for the 40/50 Chassis Engine against Revolutions Per Minute.
View original record 40/50 CHASSIS ENGINE REVS: PER MIN: DYN. 500 750 1000 1250 20 30 40 50 60 70 80 90

img080 Graph titled 'Low Compression' plotting data against Revolutions Per Minute.
View original record LOW COMPRESSION. Revs: Per Min: 1500 1750 2000 2250 0 5 10 15 20 25 30 ROLLS-ROYCE LTD. PRIVATE ROAD - 5 MAY 1921 DERBY

img081 Comparative trial of the 1.EX car, fitted with a 14-tooth axle, against the standard open Trials car.
View original record Hs. OFFERS PN COMPARATIVE TRIALS OF IEX, WITH 14T AXLE (re Rec. SPEED & ACCELERATION & PN HIS OPEN TRIALS CAR) ORIGINAL FN. from Hs. c. to C.J. c. to R. HS4/LG24.6.21. X3763 / Y3922 COMPARISON OF…

img082 Comparable axle ratio tests conducted on car 1.EX at Brooklands.
View original record Hs DOES COMPARABLE TESTS WITH 14X52 & 15X52 AXLE RATIOS & LOW & HIGH ORIGINAL CYR. ON BROOKLANDS / 1EX ALSO A LAP WITH 107MG To R. from Hs. c. to CJ. c. to BJ. c. to Da. HS7/LG13.9.22. X.788 X.3763.…

img083 Performance test results for car 1.EX with a 4-seater open touring body, comparing high and low compression engine configurations.
View original record R Particulars of car 1.EX - 4-seater open touring body - windscreen and hood - all accessories - weight complete 46¼ cwts. during tests. 15 X 52 axle ratio. Tests were taken to prove that ignition and…

img084 Performance test results for car 1.EX, a 4-seater open touring body, comparing high and low compression engine settings.
View original record Particulars of car 1.EX - 4-seater open touring body - windscreen and hood - all accessories - weight complete 46¾ cwts. during tests. 14 X 52 axle ratio. Tests were taken to prove that ignition and…

img085 Criticisms and required modifications for the RE car for West Wittering.
View original record ORIGINAL 6 EX - SPEC D To HS. from R. Copy to EH. BS MS CK. RG/G/15 RECD 13 FEB 1920 X-2923 RE CAR FOR WEST WITTERING. For our guidance in the present and future output, will you kindly see that the…

img086 Personal requirements and a list of modifications for a new car.
View original record A NEW CAR FOR R 6-EX(?) ORIGINAL To H.S. from R. COPY to Gd. EFC. X.3923 RE CAR FOR WEST WITTERING. Regarding the car for my use, I am afraid I must insist upon it being up-to-date in running and in…

img087 Modifications to magneto drives, oil retaining discs, tank fillers, and paint color preferences.
View original record To HS. from R. -2- N4/919/4/20 Contd. X.3520 (7) Fabric universals on magneto drive. X.3532 (8) I am of the opinion that our cars will be found generally preferable with present ratio of back axle. It…

img088 Extract of a memo listing modifications to be fitted to a car for West Wittering.
View original record X3532 Extract from R4/G19.4.20. X.3923. RE CAR FOR WEST WITTERING. 6EX I enclose herewith a list of pieces that I understand you will be able to fit to the car I am to have, so that I may get…

img089 Proposal concerning the replacement of car 1.EX, discussing the supply of a new chassis and body, associated delays, and design considerations.
View original record Handwritten/Stamped Annotations: A NEW CAR FOR 'R' 6/EX ORIGINAL DELAY IN GETTING PR A NEW BODY FOR IT 4-5 MONTHS DELIVERY. EFC... 10A/4289.4.20. EX BODY? NEW BODY DESIGN RECEIVED DESIRABLE - EXISTING…

img090 From 'R' to 'HS' regarding modifications to a personal car for West Wittering.
View original record To HS. from R. Copy to CJ. " " BH. " " DA. ORIGINAL (STAMP) 1" HIGHER RAD (handwritten) & BONNET. (handwritten) TO HS - "MANY THANKS" (handwritten) Ron 6EX Body Mats (handwritten) H9/G4/5/20.…

img091 Fitting of a luggage grid and an analysis of rear leaf spring performance using different materials like Ferodo or brass.
View original record To HS. from R. Copy to CJ. X.3723 2.3501 2.3981 RE 6 EX. ORIGINAL RECEIVED 2 JUN 1920 R4/D31/5/20. I put off going to the Fens with the object of trying this car, principally owing to the strike, so…

img092 Specific grey paint colour for chassis 6 EX.
View original record To HS: from R. Copy to CJ. " " EFC. ORIGINAL. D 6EX2 RECEIVED 9 JUN. 1920 X.38/6/20. X.3923. RE CHASSIS 6 EX. If the matter has not already gone too far, I should prefer the paint on this car to be a…

img093 Extract detailing a list of experimental parts fitted to the 6.EX Car.
View original record X 3582 Extract from Hs6/LG28.6.20 X.3923. HE CAR 6. EX. In reply to your telegram, we have arranged to arrive at West Wittering about 10.30 A.M. on Thursday. The following is a list of Experimental…

img094 Letter discussing the preference for wire wheels with straight-sided tyres over disc wheels for the 6 EX chassis, and opinions on paint colours.
View original record To HS. from R. Copy to CJ. [Stamped] ORIGINAL. [Handwritten] WIRE WHEELS & SS TYRES. on 1 EX [Handwritten] HOPEFULL FOR STD/N [Handwritten] FIT TO 6 EX [Handwritten] X.3923 [Handwritten] RE CHASSIS 6…

img095 Replacement and testing of low tension contact points for ignition systems.
View original record To EFC. from R. Copy to CJ. " HS. ORIGINAL 6EX 8 R5/G28/6/20. X.294 X.3817 Y.3928 X.1613 RE LOW TENSION CONTACT POINTS. With reference to low tension contact points, we have replaced the tungsten ones…

img096 'R' requesting various departments to expedite experimental work on new chassis, engines, and electrical components.
View original record To WOR. from R. HS. Copy to CJ. DA. BY. HY. ORIGINAL X.3920 X.655 [Stamp: RECEIVED 16 JUL 1920] [Handwritten note right margin: morning (at all) time to get / This would take the whole of near home]…

img097 First impressions and notes following an inspection of the 6 EX chassis.
View original record To OJ. from R. Copy to WOR. " " HB. " " PPC. " " RDV " " OLV. " " PN. " " CY. Rh 6 EX:- FIRST IMPRESSIONS *2 ORIGINAL R2/G17/1/20. RECEIVED 22 JUL 1920 X.3928. RE CHASSIS 6 EX. Mr. Hives brought 6 EX.…

img098 Reviewing design aspects of a car's back axle, springs, body, and other components.
View original record To C.J. from R. -2- R2/G17/7/20 Contd. steering wheel should have 3" plus 1/4" tolerance from the wind-screen. The bottom of the instrument board should be at least 20" from the floor. The instrument…

img099 Dynamo and speedometer drive issues, and future seating proportions for the 'Buzzard' and 'Vulture' models.
View original record To C.J. from R. -3- Contd. X.576 X.1809 X.294 X.3735 (11) DYNAMO AND SPEEDOMETER DRIVES (RE PN'S AND 1 KX) Speedometer drives make a decided noise and dynamos may, through mechanical wear of bearing,…

img100 Standardization of the earthed wiring scheme on the 6.EX car.
View original record To R. from Hs. c. to CJ. c. to Bn. c. to E c. to Da. c. to BY. c. to PN. Hs- REALISTIC REF ELECTRICS ON 6EX ORIGINAL. WHY R R CANNOT (INSTANTA) HAVE EARTHED WIRING. FIRE HAZARDS R Fc Hs3/LGS RECEIVED,…

img101 Standardizing earthed wiring systems, considering bulb types, customer modifications, and dynamo suppliers.
View original record Contd. -2- if we say we are going to insist on the single contact bulb holder then we want to realise the difficulties customers may have in obtaining lamps with suitable fittings and spare bulbs. *…

img102 Suitable switches for the Smith Dynamo and details of a wiring fault investigation on a car.
View original record Contd. -3- HES/LG20.7.20. --------------- as regards cutting in speed and we think we ought to get it on as quickly as possible. The trouble is that we have no suitable switch for the Smith Dynamo. We…

img103 Instructions regarding seating, screen, and a new instrument board design for chassis 6 EX with special reference to 'D' steering.
View original record E VIA DA INSTRUCTS REF SEATING & SCREEN FOR ORIGINAL. 6 EX. NEW BODY. TO DA. from E. Copy to CY. * S.G * H.S. * EFC. 4152 RE PARTICULARS OF BODY FOR "D" STEERING WITH SPECIAL REFERENCE TO CHASSIS 6…

img104 Bodywork modifications, seating arrangements, and blueprints for chassis 6 KX.
View original record To BA. from E. -2- [Handwritten: R1/G21/7/20 Contd.] side to fill up the space between the forward edge of the inclined portion of the screen and the upper edge of the scuttle. This is considered…

img105 From R. to H.S. about arranging a meeting in Peterborough for chassis 6 EX and confirming a drawing has been sent to Derby.
View original record R ASKS HS TO MEET HIM WITH 6EX IN PETERBOROUGH ORIGINAL R2/G21/7/20 To H.S. from R. Copy to C.J. [STAMP] D 23 JUL 1920 [STAMP] RECEIVED X.3923 RE CHASSIS 6 EX. I shall be away on the 5th or 6th…

img106 Notes on matters arising from a visit to West Wittering, concerning the Switchbox, Battery, Starter, Primer, and Bodywork for chassis 6 EX.
View original record MAINLY 6 EX ORIGINAL MINUTE VISIT OF MESSRS. WORMALD, HIVES, NORTHEY, AND COHEN TO WEST WITTERING, 1st JULY, 1920. X1678. X.3923. The following notes give the matters not dealt with by Mr. Royce in…

img107 Issues and improvements for bodywork, steering, wheels, and springs.
View original record To WOR. from E. -2- E1/G22/7/20 Contd. BODYWORK (CONTD.) Mr. Royce considered this quite satisfactory, but he pointed out that to avoid re-painting, no painted joints on the exterior of the car should…

img108 Design alterations for a side filler on a petrol tank and a new model for a distribution board.
View original record To WOR. from E. -3- E1/G22/7/20 Contd. SIDE FILLER ON PETROL TANK. X.3559. Mr. Royce thinks the screw-up handle should have a cross bar or star handle, and an alteration should be made to allow the…

img109 Technical memo detailing notes from a visit on 1st July 1920 concerning chassis 6.EX, covering the switchbox, battery, starter, primer, and bodywork.
View original record VULTURE A Stg NOT NEEDED ATW 40/80 WHEELS - WIRE - DUNLOP DISC - MICHELIN E1/G22.7.20. 6EX MISC ELECT To Wor. from E. Copy to CJ. " " Bn. " " Hs. " " Da. " " By. " " Hy. X.3923. RE VISIT OF MESSRS.…

img110 Technical memo discussing design and testing of bodywork, steering, wheels, and road springs.
View original record Contd. -2- BODYWORK (CONTD) he pointed out that to avoid re-painting, no painted joint on the exterior of the car should be broken. A break does actually occur in a prominent position when the scuttle…

img111 Design changes for a petrol tank filler handle and a distribution board.
View original record Contd. -3- E1/G22.7.20. SIDE FILLER ON PETROL TANK. X.3889. Mr. Royce thinks the screw-up handle should have a cross bar or star handle and an alteration should be made to allow the petrol to run in…

img112 Instructions for the seat dimensions and features of a new Park-Ward body for chassis 6 EX.
View original record R(E) INSTRUCTS SEAT DIMS FOR THE NEW PARK-WARD BODY FOR 6 EX To C. from E. Copy to CJ. DA. HS. EPC. 26 JUL 1952 RECEIVED ORIGINAL. BODY FOR CHASSIS 6 EX. X.3923 With regard to the body for chassis 6…

img113 Trial and potential adoption of Smith lighting dynamo equipment on experimental cars.
View original record 6EX & 49GB FITTED WITH ORIGINAL. SMITHS DYNAMOS. EFC12/T24.7.20. To R. from FFC. c. to CJ. c. to E. c. to PN. c. to Bn. c. to By. c. to Da. c. to EP. c. to Hs. X. 4164 - SMITH LIGHTING DYNAMO…

img114 Discussion of three alternative electrical switchboard and wiring systems.
View original record Contd. -2- EFC12/T24.7.20. we have [handwritten above: has] experimented with, appeared to be quite reliable and to have a much smaller range of variation than the Lucas; in fact, a range which is…

img115 Arrangement with Messrs. Smith to proceed with the production and design of a switchbox.
View original record Contd. -3- EFC12/T24.7.20. It is thought, however, owing to the great changes involved that neither (2) or (3) could materialize and as already stated, the only feasible proposition seems to be (1).…

img116 Telegram from Royce to Hives and Clark regarding difficulties with an earth scheme for twelve-volt electrical equipment.
View original record CONFIRMATION OF TELEGRAM TELEPHONED TO CHICHESTER. ROYCAR DERBY. ORIGINAL. X.3923 X.4165 X.3654 X.295 X.4164 X.2778 X.3762 HIVES CLARK REGARDING 6EX AND FUTURE ELECTRICAL EQUIPMENT DIFFICULT TO…

img117 Instructions on the colour choice for the body and hood of car 6 EX.
View original record R- INSTRUCTS COLOUR FOR HIS NEW PARK WARD BODY FOR 6 EX ORIGINAL To C. from R. Copy to CJ. " " SP. " " HS. RB/D/7/20. 2 AUG 1920 RECEIVED X3923 RE CAR 6 EX. We choose the Admiralty or battleship grey…

img118 New instrument board for the 6 EX model, detailing three new features to meet sales and American requirements.
View original record To DA. from R. Copy to OGV " " HB. " " FM. " " RPC. " " HY. R.R. of America Inc. (For the attention of OY.) ORIGINAL X.4163 RE NEW INSTRUMENT BOARD. X.3686 With reference to your memo DAB/CB30/T/20,…

img119 Criticising the handling of electrical errors on car 6 EX and confirming new designs have been sent.
View original record Handwritten notes: R STILL NIGGLED ABOUT SHODDY ELECTRICS ON 6 EX. STATES *9(L) ORIGINAL EFC FOR NOT PERSONALLY INSPECTING & CRITICISING IT (AS R WOULD UNDOUBTEDLY HAVE DONE). R NOW GIVES EFC COMPLETE…

img120 Arranging a chassis comparison and outlining future production modifications.
View original record [Handwritten at top]: 1 EX + 6EX } TECHNICAL SIGNIFICANCE to A P N A/R/G26-9-20 OCRI O/C/VIC/66/9/20 [Stamped]: ORIGINAL [Stamped]: 8 SEP 1920 [Handwritten right]: TAL [Typed header]: To: HD. from R.…

img121 Letter discussing design specifications for a car body, including beading, windscreen, scuttle, and instrument board.
View original record To DAY from E. SEP C 120 ORIGINAL RECEIVED REF R10/63/9/20 21/W/9/20. Handwritten notes: 6 EX (R's SECOND POST-WAR BODY) - PARK WARD SAN'S BEADING / A NEAR-IMPOSSIBLE REQUIREMENT IN 1920 X.4152…

img122 Querying dimensional differences for the brake lever position on various car chassis.
View original record To EV. from E. Copy to CJ. [Text struck through: DA.] HS. [STAMP: ORIGINAL] RE BODY FOR 6 EX [STAMP: D 25 SEP 1920 RECEIVED] E1/G23/9/20. BODY Many thanks for your memo concerning position of side…

img123 With a diagram regarding an alteration to a brake lever dimension for drawing Lec.1280.
View original record To BY. from E. (Drawing from Works Correspondence) -2- E1/G23/9/20 Contd. of We await your reply before informing the coachbuilders that the dimension given for the brake lever on Lec.1280 must be…

img124 Methods to achieve high petrol consumption (35-37 mpg) on a 40/50 chassis.
View original record HS, ON HOW TO GET 35 MPG FROM A SILVER GHOST. REF Hs 1/LG 28.10.20 (6ex) To R. from Hs. c. to CJ. c. to Bn. c. to E. c. to Da. c. to By. c. to EP. c. to PN. c. to C. c. to EWT. for R.R. Inc. c. to H.…

img125 Factors affecting petrol consumption, including driving techniques and measurement methods.
View original record R.R. 199 (250r) (SD676 19-7-17) MP 180865 Contd. -2- HS2/LG30. 9.20. Perhaps the biggest factor as regards obtaining excellent petrol consumption is the way in which the car is driven. The car should…

img126 Improvement of car consumption and maximum speed, and managing the sales department's perception of competitor performance.
View original record Contd. -3- Hs2/LH30.9.20. down hill. Whatever we do to improve the car in obtaining consumption will also help as regards its maximum speed.z Whether it would serve any useful purpose to carry out a…

img127 Notes from a visit concerning the experimental Goshawk engine, including cylinder jackets and water pipes.
View original record R.R. 285A (120 T) (S.H-199, 17-8-20) G. 2830 To Hs. ) from E. H. " Da. ) Copy to C.J. " " Wor. " " RY. " " EFC. ARMOURED CAR HAND CRANKING / EX H to E EX. with 27 MPG! R. SUGGESTS DEMO E.L./08.10.20.…

img128 Issues and suggestions regarding the camshaft drive, valve gear, sparking plug positions, and fuel consumption on the 40/50 HP chassis.
View original record Contd. -2- Camshaft Drive. X.3310. The top universal, Mr. Royce suggests, could have vanes on the outside for pumping down the oil. The serrated joints should have entering curves on the teeth like…

img129 Issues and potential improvements for the 40/50 HP chassis, including steering, shock dampers, and axle ratios.
View original record Contd. -3- Mr. Royce thought the thud on 1.EX was unusual, with which Mr. Hives agreed on trying the car. It was finally concluded that a crankshaft bearing probably has become slack through wear or…

img130 Design decisions on components for the Buzzard model, armoured cars, and other vehicles.
View original record Contd. -4 E1/GS.10.20. and displacements per ton mile are. Mr. Hives should send to West Wittering blue prints of charts showing power required to climb hills of various gradients. Mr. Royce thought…

img131 Impulse starters versus hand magnetos for armoured cars and the design of an air pump for tyres.
View original record Contd. E1/GS.10.20. ARMOURED CARS. X.4195. Impulse Starter versus Hand Magneto. Regarding the above point Mr. Royce stated that the War Department should have whichever they liked, but that he advised…

img132 Design and engagement mechanism of a hand starter for an engine.
View original record Contd. Hand Starter.- (For starting the engine from within the armoured turret by hand.) In the scheme brought by Mr. Day it was proposed to turn the engine by means of a pinion gearing with the edge…

img133 The fuel consumption of a 40/50 HP chassis, tyre efficiency, and potential improvements.
View original record Hs cars 27 MPG from 6EX ON 180 MILE JOURNEY FROM DERBY TO WW REF E1/L628-10-20 Extract from E1/G8.10.20. RE VISIT OF MESSRS. HIVES & DAY TO WEST WITTERING X.1698 TUESDAY. 5th October 1920. X.3056.…

img134 Tests on petrol consumption for the 40/50 chassis and the 6.EX car.
View original record Handwritten notes: Hs, ON 6 EX RETURNS 28 MPG FROM DERBY TO WW (180 MILES, AT 28 MPH AVERAGE SPEED OPEN CAR 2 1/2 TONS AUW.). WHERE THE PETROL ACTUALLY GOES. RET Hs2/LG 30-9-20 (crossed out)…

img135 Petrol consumption and mechanical efficiency tests conducted under various road and shop conditions.
View original record Contd. -2- Hs1/LG28.10.20. that we were losing speed, we got less M.P.G. There is a fair range on the mixture where there is very little difference in the M.P.G. We found that with the magneto…

img136 Fuel consumption (M.P.G.) tests and driving techniques to improve economy.
View original record Contd. -3- Hs1/LG28.10.20. following M.P.G. 1. Engine running the whole time - throttle open sufficient to maintain a steady car speed at 25 M.P.H. M.P.G. 23.2 2. Car run up to 30 M.P.H. clutch…

img137 Continued note discussing the reduction of transmission losses with thin oil and comparing fuel consumption rates.
View original record -4- Hs1/LG28.10.20. Contd. This is on a car which we have reduced the transmission losses to a minimum by use of thin oil. If we take an average car in the customers hands which does 15 M.P.G. in an…

img138 Update on the 6.EX Car's body frame fitting by Park Wards and a list of new parts to be installed.
View original record Handwritten notes: 6 EX TO PK WARDS - BODY FRAME NOW ON CHASSIS. COMPLETION EXPECTED IN 1 MONTH (MID DEC (20)). 6EX WILL HAVE ALL THE LATEST PIECES (& MAIN ITEMS). To R. from Hs. c. to CJ. c. to BN.…

img139 Troubleshooting of a faulty petrol level indicator that gives erratic readings and leaks fuel.
View original record To R. from HS. c.c. to CJ c.c. to L. c.c. to P. c.c. to Da. c.c. to EY. c.c. to EF. [Handwritten note: EXh (FP visit to USA)] [Stamp: ORIGINAL E I F FEB] [Stamp: RECEIVED] [Underlined] X.3888…

img140 Status report on car 6-EX, detailing issues with the petrol level indicator and required parts.
View original record Hsb'CAR FOR 'R' 6EX To R. and E. from Hs. (IC-C-03) c. to CJ. c. to Bm and BY. c. to Ba. c. to EWI. for R.R.Inc. ORIGINAL Hs4/LGSB.2.21. X3923 ' RR. 6-EX CAR. ____________________ We have got this car…

img141 Starting and slow running device issue on a 40/50 HP chassis, number 6 EX, detailing an explosion and proposed alterations.
View original record E HAS A HARD SNIPE AT Ref 6 EX ORIGINAL To HS. from E. Copy to Oc. " " " DA. Y4305 E2/G8/6/21. RE STARTING AND SLOW RUNNING DEVICE - 40/50 HP.CHASSIS. In connection with the above, and chassis 6 EX,…

img142 The starting and slow running device for the 40/50 chassis, specifically discussing the throttle.
View original record To E. From Hs. c. to CJ. c. to Da. [Handwritten]: DOWN TO SIZE REF BEX (E2/GS/6/21) HGS/LC9.6.21. RE. STARTING AND SLOW RUNNING DEVICE - 40/50 CHASSIS: Referring to your memo. E2/GS.6.21. To the best…

img143 Memo discussing personnel dynamics and a critical assessment of vehicle design problems.
View original record HS E has clearly tried to get a crafty one in on HS, but has reckoned without HS's phenomenal memory & knowledge of what's what. E E would have to include this memo. C with its undertones, going to CJ…

img144 Testing the 6.EX car in France, design requirements, and a focus on reliability over production.
View original record To Hs. from R. c. to Wor. c. to EPC. c. to BP. c. to BY. c. to Hy. [Handwritten:] tel 6 EX [Handwritten:] ATW. 40/50 H/C 6EX RI/M18.1.22. RE 6.EX CAR. X.3923 Replying to your memo. to E.,…

img145 Testing of car 6EX in cold weather, reliability, and design modifications.
View original record [Handwritten at top] R INVITES Hs TO BRING 6EX. AFTER MODIFICATIONS TO HIM AT L.C. 6EX. DURING THE COLDEST OF THE WEATHER [Handwritten Reference] R1/M13.1.22. NEATER [Stamps] ORIGINAL RECEIVED RE 6 EX…

img146 Proposing modifications for the 6.EX car and arranging its return to Derby from France.
View original record HS SAYS, "YES" TO A COLD RIDE OF CAR 6 EX ACROSS FRANCE & ARRANGES TO COLLECT 6EX FROM NW FOR COLD WEATHER MODDING AT DERBY To R. from Hs. c. to CJ. c. to E. c. to Dn. c. to BY. c. to EF. c. to Wor.…

img147 From 'R.' to 'Hs.' regarding the preference for black upholstery and the method for producing a dark grey paint for an experimental car.
View original record R.R. 231a (100 T) (S.H 798 10-12-20) G. 2048 ORIGINAL RECEIVED JUL 20 1922 FC To Hs. from R. R7/119.7.22. 6. EX. CAR. X3923 Reference your memo. - Hs3/Lg10.7.22. - I pre- fer black upholstery for…

img148 From Mr. Royce detailing build specifications for the 6EX chassis, including paint and upholstery.
View original record R.R. 25M (100 T) (S.H 798. 10-12-20) G. 2048 ORIGINAL R To Hs. from E. E4/M19.7.22. RE. 6. EX. CHASSIS. X3923 Referring to 6EX chassis, when this is built up Mr. Royce thinks that it should have thin…

img149 Rationalisation of electrical equipment by using modified Goshawk components on the 40/50 chassis.
View original record [Handwritten annotation at top] He puts to R some sensible rationalisation ideas, to use some Goshawk electrics on the 40/50. THESE IDEAS WERE LATER EMBODIED AND PROVED ON GEX AND PUT INTO PRODUCTION…

img150 Vehicle junction boxes, wiring, and dual ignition systems for 40/50 models, comparing UK and Springfield configurations.
View original record contd:- -2- R JUNCTION BOX AND CUTOUT. These would be identical. WIRING. The earth wiring should be used on the 40/50 which would save a lot of wire, look much neater and would enable us to have only…

img151 Adapting Goshawk electrical equipment for the 40/50 model and modifying the G.XX car.
View original record contd:- -3- R any time. We think the advantages of the Goshawk type of locked ignition switch are such that we ought to insist that it is duplicated on the 40/50. KLAXON HORN SWITCH. The locked…

img152 Front and rear shock absorber selection for the 40/50 HP model, comparing them to those on the Goshawk.
View original record contd: -4- R the 40/50 HP. are - X3461 FRONT SHOCK ABSORBERS. We see no reason for going on producing the more expensive type 40/50 shock absorbers when the front shock absorbers on the Goshawk are…

img153 Progress report on repairs and proposed electrical component fitting for car 6.EX following an accident.
View original record REF Hs/LG 25.8.22. R HAS APPROVED "Hs NOW GOES AHEAD, FITTING IT IN" WITH THE NEW BODY PROGRAMME. 6EX ORIGINAL To R. from Hs. c. to C.J. c. to E. c. to Dn. c. to BY. Hs3/LG 14.9.22. 6.EX CAR. X3923…

img154 The finishing and painting timeline for a car, including alternative finish options.
View original record contd:- -2- The car will be completely finished, painted and varnished in 4 weeks. If the body is finished in lead colour instead of varnished, it will be three weeks. We are sending samples of paint…

img155 Improvements to the 40/50 chassis by fitting Goshawk electrical equipment and a vacuum tank fuel system.
View original record HS LIKES HIS RATIONALISATION OF '6 EX' ELECTRICS & GOES FURTHER. FITTING '6 EX' AN AUTOVAC FUEL FEED (+ MANY OTHER 20HP ORIGINAL UNITS), THUS ELIMINATING THE INTRICATE AND VERY COSTLY & TROUBLESOME…

img156 The instrument board layout, ignition switch, magneto, and a larger generator for the 40/50 model.
View original record contd:- -2- R Instrument Board. Owing to the fact of us doing without the pressure pump and pressure gauge, we can arrange the instruments in a similar manner to the Goshawk. We are waiting for…

img157 Paint color selections for the 6.EX and No.4.Goshawk car models.
View original record H.R 325 A (100 T. 18-F.816 6-2-19) C 2463 ORIGINAL. 40/50 6 EX Colours To HS. from R. R5/M21.9.22. RE. COACHWORK PAINTING ON 6.EX. and NO.4.GOSHAWK. X635 X3823 X4219 I think grey No.7. in Messrs…

img158 From R. to HS. regarding modifications to the 6.EX and 40/50 models, specifically avoiding the vapouriser scheme.
View original record R AGREES WITH HS REF NOT GOING ON WITH VAPOURISER. 40/50 6EX To HS. from R. ORIGINAL R3/M9.10.22. 6.EX, AND OTHER 40/50s. With reference to 6.EX and other 40/50s I am quite in agreement with you that…

img159 Pros and cons of a vapouriser scheme for the 40/50 chassis.
View original record FUEL DISTRIBUTION, 40/50 & 'CASWELL'S BOILER' Hs6/T5.10.22. H.S PUTS THE PROS & CONS OF THE BOILER & EXH. HEATED THROTTLE & COMES DOWN ON THE SIDE OF THE LATTER (TO SCOTCH STANDARDISATION OF THE…

img160 Continued discussion on the limitations of exhaust heated throttles and improvements via a vaporiser scheme.
View original record H&S/T5.10.22. -2- Contd. (3) It increases the complicated appearance of the engine. It should be realised that the exhaust heated throttle has limitations. Under any normal conditions met on the road…

img161 Modifications to the 40/50 standard induction pipe to improve petrol distribution and prevent misfiring.
View original record -3- the engine in order that the weakest cylinder will fire regularly, is drained into the vessel and wasted. Once the petrol which has been measured out by the carburetter is in excess of the…

img162 Testing a vaporizer scheme, discussing issues with boilers, pilot jets, and cold starting.
View original record Contd. -4- boiler, but there is no doubt it did so, because we fixed a bottle in the vent pipe and collected the petrol which was travelling from the boiler into the induction pipe. We practically…

img163 Recommendation based on road tests to continue with the exhaust heated throttle and not fit the vapouriser scheme.
View original record -5- Contd. Once the exhaust heated throttle has arrived at its normal temperature the amount of liquid which drains into the vapouriser scheme is practically nil. This has been found by long tests on…

img164 Proposed repositioning of the central handbrake and gear change levers.
View original record CHANGEOVER OF CENTRAL HANDBRAKE GTT ORIGINAL. 6EX R GETS IT BACK WITH MODS & GIVES '?' REACTION S LIST X4252 X4338 6EX TO SS. FROM R. c. to CD. WOR. c. to PH. HY. c. to HS. SP. c. to CX. G. RE.…

img165 Typed report discussing observations on central lever arrangements and modifications to car 6.EX using Goshawk parts.
View original record (2) R I took particular care to see the arrangement of central levers as fitted to the chassis at the Show. I was pleased to find there was nothing quite equal in quality, mechanically or in the…

img166 List of modifications for the 6.EX. car.
View original record LIST OF MODIFICATIONS ON 6.EX. CAR. ORIGIN. (1) Exhaust gas heated throttle with valve in exhaust. RR. (2) Shock absorbers. Hartford. (3) Autovac with tank of ample dimensions with suitable fittings…

img167 List of parts and modifications fitted to the 6.EX car.
View original record To R. from Hs. c. to CJ. c. to L. c. to Da. c. to HY. ORIGINAL EXCEPT FOR FWB 6 EX THE LAST MAJOR BATCH OF PROPOSED MODS FOR THE 40/50 TO BE TESTED & CRITICISED BY R ON HIS SECOND FXD CAR - 6EX…

img168 List of modifications and specifications for a vehicle, continued from a previous page.
View original record contd:- -2- 14. Breather connection from carburetter to crankcase. 15. Dipping head lights fitted. We have entirely altered the Barker arrangement in order to find a more convenient and better fixing…

img169 Standardisation sheets, noting Mr. Royce's rejection of a vaporiser scheme.
View original record R REJECTS CASWELLS 'BOILER' ACCEPTS BONNET HANDLES TELEGAUGE ORIGINAL BATT IGN WITH GOVERNOR 40/50 R.R. 355A (100 T) CS H 159. 11-8-20 G. 2800 TO HS. FROM RS. RS2/114.11.22. STANDARDISATION SHEETS.…

img170 Design of an 18-inch steering wheel rim for the 40/50, 6.EX, and 'Seagull' models.
View original record TO BY. FROM DA. c. to cd. c. to WDR. c. to HS. ORIGINAL RECEIVED NOV 16 1922 6 EX SEAGULL MMA.11.22. STEERING WHEEL RIM. 18" THICK THAN (GT) RE. 40/50. V3923 V3465 V4264 With reference to the steering…

img171 Explaining the inability to work on left-hand controls for the Goshawk due to being overloaded with modifications for the 40/50 model.
View original record TO Ed. FROM R. c.c. to Ed. c.c. to HS. ✓ (Stamped) ORIGINAL (Handwritten) R OVERLOADED WITH 40/50 WORK (Handwritten) CANNOT FIND TIME FOR (Handwritten) LHD GII (Handwritten) G1 (Handwritten) POC…

img172 Review of the 40/50 car model, comparing it to the Goshawk chassis and recommending body styles suitable for owner and lady drivers.
View original record TO S.J. or B.J. FROM R. c. to H.S. & E.P. ORIGINAL R6/M1.12.22. 6.EX. & GOSHAWK. X3923 X4269 I have now got my 40/50 back which was damaged in France. This car is a fine one, and with one or two…

img173 Alteration instructions for the main throttle closing spring on a 40/50 chassis.
View original record R.R. 235A (100 T) S H. 159 (1-8-20) G. 2500 TO HS. FROM E. c.c. to CJ. BY. EP. Handwritten: Spring for closing throttle with Starter Carb 6EX & others Stamp: ORIGINAL Stamp: RECEIVED 17 DEC 1922 HS…

img174 Exhaust valve failures and requesting tests on different seat angles and clearances.
View original record R.R. 235a (100 T) S H. (1-8-30) G. 2500 TO HS. FROM R. c.c. to CJ. HC. c.c. to FA. WGR. c.c. to DY. Hm. c.c. to CY. AH. ORIGINAL (Stamp) EXH VALVES SEAT ANGLES, CLEARANCES & BURNING (Handwritten)…

img175 Causes of burnt valves in Goshawk engines and potential solutions.
View original record H.R. 235A (700 B) S.H. 159 (1-8-30) G. 2500 ORIGINAL RECEIVED [Stamp with clock face, JAN 1933] TO HS. FROM R. c. to CJ. BJ. c. to PH. WCR. c. to RG. HX. c. to Hm. OT. c. to EP. R1/1429.12.22. RE.…

img176 Practice of pinning piston rings and referencing the Hawk engine.
View original record (2) You will remember that EP. reported that America had abandoned pinning the piston rings. I think this would reduce efficiency of gas-tightness, and occasionally become disastrous unless a more…

img177 Reducing torque reaction vibration on the 40/50 HP chassis.
View original record ENGINE TORQUE REACTION VIBRATION EXPERIMENT 4EX 49GB EXPERIMENTAL REPORT. R.R. 493 (40 H) (SL 12 12-7-23). J.H. D. COPIES TO: R.C.J. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. X.4604 (crossed out)…

img178 From 'E' to 'Hs' relaying a request from Mr. Royce for distance tubes for a rigid feet experiment on car 6.EX.
View original record R STILL PLAGUED WITH TORQUE REACTION VIBRATION X.4604. ASKS FOR AN EXPLORATORY MOD FOR E1/M27.9.23. 6EX. To Hs. from E. RE. FRONT FEET ON 40/50 MADE RIGID. X.4604. Regarding 6.EX at WW. Mr. Royce says…

img179 Urgent dispatch of parts for a torque reaction experiment on the 6.EX car.
View original record R BECOMES X.4604 RAMPANT (a/c TO E) To Hs. from E. REF HIS MOD SST 6EX E2/M29.9.23. REF E1/M29.9.23 RE. TORQUE REACTION - 40/50 HP. X.4604. Regarding the distance pieces for trying the rigid front…

img180 The tractive resistance of a car and the expected increase in speed from an increase in power.
View original record R.R. 403 A (40 H) (SL 42 12-7-23). J.H.D. EXPERIMENTAL REPORT. Expl. No. 4578 6 EX REF: He/Rm/LGS. 2. 24. INCREASE OF SPEED TO BE EXPECTED FROM A NEW INCREASE IN POWER The tractive resistance of a car…

img181 Comparing the riding and springing characteristics of car models 1 EX and 6 EX.
View original record To HS. from R. Copy to Sd. " MON. " DAY. " EFC. " SF. x8d. x21 cenafnd -96 D / RT/620/S/20. 29 AUG 1920 Now phrased " x31 - Iabsen copy returned ORIGINAL RECEIVED 2.9.20 X 37639 RE SPRINGING OF 1 EX.…

img182 Comparison of two experimental cars (1 EX and 6 EX) with different back axle ratios, focusing on fuel consumption and performance.
View original record To HS. from R. Copy to C.J. " " ROR. " " DA. " " HY. " " EVC. X.3545 RE LOWER RATIO OF BACK AXLE - COMPARISON OF 1 EX. WITH 6 EX. X.3763~ X.3923 In my recent comparison of 1 EX. with 6 EX. I found no…

img183 Comparison of steering performance between two experimental cars, 1 EX and 6 EX, noting stability and handling on crowned roads.
View original record To MS: from R. Copy to Con: " " SUN: " " DA: " " DIV: " " EPO: ORIGINAL X.3763a RE STEERING - 1 EX. COMPARED WITH 6 EX. V.963 (Handwritten below: X.3923a) (Stamped over "COMPARED WITH 6 EX.":…

img184 Comparing a 1 EX starter with a 6 EX starter, noting increased noise and suggesting improvements.
View original record To HS. from R. Copy to CJV. " " WOH. " " DAY. " " RY. " " EFO. " " BF. ORIGINAL. R10/G23/8/20. 10 RE STARTER - 1 EX. COMPARED WITH 6 EX. X.37036 X.39236 X.3082 X.3986 X.8350 X.3779 The starter behaved…

img185 Comparing the ignition systems of cars 1 EX and 6 EX, noting differences in timing and potential impact on petrol consumption.
View original record To HS. from R. Copy to CJ. " " WOR. " " BA. " " BY. " " EFC. " " BF. ORIGINAL R9/G23/8/20. 6 X 37636 X 9236 X 3159 X 699 RE IGNITION - 1 EX. COMPARED WITH 6 EX. The ignition on both these cars behaved…

img186 Complaint about the falling standards of work and finish on chassis 6 EX compared with 1 EX.
View original record R COMPLAINING TO HS ON FALLING STANDARDS OF WORK & FINISH ON HIS 6EX & 1EX. To Hs, from R. Copy to OJr. ✓ WOR. ✓ DA. ✓ SY. RPC. ✓ X.3763 X.3923 RE FITTERS' WORK ON 6 EX. COMPARED WITH 1 EX. RECEIVED…

img187 The difficulty of pressurizing the fuel tank due to a misaligned priming cock or defective piping.
View original record To HS. from R. -2- R12/023/8/20 Contd. The same thing occurred on 6 EX. but it was found that the priming cock was not absolutely over to the running position. It is possible with other cars the…

img188 The deterioration of workmanship, poor engine compression, and dynamo belt tension issues on a car.
View original record CR INSTRUCTS HS TO CALL WOR TO ORDER REF FALL-OFF IN QUALITY OF FINISH AND COMMENTS ON CORONATION H1/330/8/20. RATTLES - ORIGINAL. NEED 6EX FOR LONG DRIVE TO BIS 1) DYNAMO DRIVE TENSIONER ASSEMBLY 2)…

img189 Dynamo suspension clip fault and an investigation into a knock in the transmission.
View original record TO HS. from R. -2- R1/G30/8/20 Contd. looked upon as an improvement in proportions. K.2496 X.6899 In an attempt to refit the new dynamo we found a suspension tube clip at the forward end would not…

img190 Cause of knocks in lower gears and potential solutions involving couplings, propeller shafts, and torque tubes.
View original record To HS. from R. -3- H1/030/8/20 Contd. they have been for many years. It will, however, be slightly worse in these lower geared cars because the change of speed in the transmission shaft is…

img191 Summary of post-war design and development programmes from 1918-1923, listing various models and key dates.
View original record HERON HO/50 WITH SERVO BRAKES changed to Pneu then tack'd & Servo 4-10-22 9-10-22 12-10-22 14-10-22 20-10-22 18-10-22 30-12-22 SERVO ENG. 18-1-23 CURLEW? & SEAGULL OHV HO/50 + FW B (PI Pro.) 12-10-22…

img192 List of proposed new car models with their technical specifications.
View original record NEW MODELS BUZZARD - 40/50 Vee 12. VULTURE 6 CYL OHV LONG STROKE 4" x 5 1/2" Bore & Stroke HERON 6 CYL OHV 40/50 WITH PNEUMATIC F.W.B. air pump on camshaft, then Servo. SEAGULL - OHV 40/50 4 1/2 x 5…

img193 Inquiry from Mr. Royce about the effect of radius rods on the steering of the new 40/50 car over rough roads.
View original record Hs. from Da. R ASKS ABOUT EFFECT ON NEW 40/50 ROUGH ROADS OF RADIUS RODS ON FRONT AXLE Dal/14.7.22. RE. NEW 40/50 CAR X3983.X4547. In connection with the new 40/50 design, Mr. Royce is anxious to know…

img194 Frame modifications for the 40/50 model to accommodate different engine, brake, and suspension setups for export.
View original record (5ex?) EXPORT FRAME 40/50 MOVES 1 & 2 WITH PRESENT ENGINE & RADIUS RODS ALSO NEW ENGINE WITH EXISTING GEARBOX, BACK AXLE & REAR SUSPENSION i.e. PHANTOM I OR "SEAGULL" To Hy. from Da. c. to OJ. c. to…

img195 Extract discussing the commencement of work on experimental export chassis and associated parts.
View original record X.3548 R. PUT FIZZ INTO EXP. EXPORT CHASSIS Extract from R3/M25.8.22. VISIT TO WW. X.4219. X.3408. X.3441 With reference to the experimental export chassis we are ready to put in hand immediately, in…

img196 Drawing for a new front axle with front wheel brakes and its patentability against the Hotchkiss patent.
View original record To BY. from Da. c. to CJ. c. to Wcr. c. to Hs. Handwritten notes: X4548 EXPORT CHASSIS FWB MOVE 1 Da1/M28.8.22. EXPORT CHASSIS - FRONT AXLE X.4547. We send herewith R.sch. 1317 shewing the front axle…

img197 Potential causes and experimental solutions for knocking gears in an engine's camshaft drive.
View original record ARRIVING AT POSSIBLE CAUSES OF CAMSHAFT DRIVE KNOCKING GEARS TO H.B. & E.W. from R. c. to E.W. E.W. E.P.C. [STAMP: RECEIVED SEP 6 1922] X3845 X3473 In consequence of our anxiety to settle the camshaft…

img198 Methods to address engine crankshaft speed irregularities, including flywheel adjustments and experimental belt drives.
View original record (2) The other way is to give the shafts a natural tenden-cy to slow down, and so follow the irregularities of the primary turning. If the engine is coupled up to the dynamometer, with fabric…

img199 Production strategy for the 'Curlew' model and the standardisation of parts for 40/50 improvements.
View original record To BJ. from R. c. to CJ. Wor. c. to HY. Hs. EP. Handwritten: V3548 Handwritten: Prototype P1 - 'Curlew' R2/119.9.22. My dear BJ., IMPROVEMENTS IN 40/50. C.3548. I shall be glad if you will discuss…

img200 Concluding a discussion on standardizing processes between the Drawing Offices and the Works.
View original record contd:- -2- with the utmost possible speed both in the D.Os and the Works, as can be found most convenient to facilitate progress. Later on we can judge from the results, when we can standardise any…

img201 Production strategies for improvements to the 40/50 model, including the 'Curlew' variant with front-wheel brakes and an overhead valve engine.
View original record [Handwritten:] ORIGINAL 40/50 E.P. CURLEW H2/14.9.22. (P1) (PRO.) To BJ. From R. c. to Ed. Wor. [text crossed out] c. to Hy. Hs. [text crossed out] My dear BJ., IMPROVEMENTS IN 40/50. X.3548 I shall…

img202 Front spring shackle, dumb iron, and frame depth for the Stork, Curlew, and Vulture projects.
View original record FRONT SPRINGS SHACKLED AT FORWARD END, ESSENTIAL FOR FWB (WHEN APPLIED WHEN CORNERING) 67 STORK, CURLEW & VULTURE Da2/119.9.22. To BY. from Da. c. to CJ. c. to Wor. c. to Hs. X.4547. Please receive…

img203 The final design of the 'Stork' frame, referencing drawing N.sch. 1324.
View original record ORIGINAL EXP. STORK To HY. from DA. c. to Cd. Wor. HS. DA3/M16.9.22. RE. "STORK" FRAME. X 3984 We send you herewith N.sch. 1324 shewing the front end of the frame in the final form in which we should…

img204 Outlining modifications for the 'Heron' chassis, including front wheel brakes, a new exhaust system, and engine alterations.
View original record 'MOVES' (IN HO/SO DEUTHS - FWB NARROWED FRONT FRAME 13 III 1922 SINGLE REAR BRAKES NEW EXH SYSTEM (AS PER GI) CUTOUT REAR SILENCER AIR PUMP EXH HEATED THROTTLE (POSSIBLY) EARTHED WIRING To ST. from R.…

img205 Modifications required for the 'Heron' model to fit front-wheel brakes and associated systems.
View original record MODS NEEDED FOR FWB. HERON AIR PUMP(BRAKE SYSTEM) EXH HEATED THROTTLE To BY. from R. c. to CJ. c. to Wor. c. to Hs. c. to Sp. R2/11 18.9.22. RE 40/50 ("HERON") X.4550. X.3850. In fitting front wheel…

img206 Preliminary arrangement of the 'Stork' pneumatic brake system and required components.
View original record Exp STORK To By. from Da. c.c. to CJ. Wor. Hs. Da3/430.9.22. "STORK" PNEUMATIC RECEIVED X 3874 We send herewith N.Sch. 1330 showing a preliminary arrangement of the operating gear of the brakes on the…

img207 Proposed modification to the 'Stork' exhaust system to accommodate front wheel brakes.
View original record STORK. To EY. from Da. c. to CJ. c. to Wor. c. to Hs. Da2/M30.9.22. "STORK" EXHAUST SYSTEM X.3859. We send herewith N.sch.1331 shewing the proposed exhaust system for the Stork, called for by the…

img208 The testing of an air pump driven by a camshaft for a four-wheel brake system.
View original record R R 25M x 11/20 To SBY S16 C & M G 2468 ORIGINAL RECEIVED OCT 5 1922 AIR PUMP FOR HERON FWB SYSTEM PNEN FWB TO HS. FROM E. C. TO GJ. El/14.10.22. RE. TESTING AIR PUMP DRIVEN BY CAMSHAFT. X3454 X3830…

img209 Diagram illustrating the drilling positions for pump and camshaft wheel coupling flanges.
View original record (2) to drill a number of holes in the coupling flanges of both the pump and the camshaft wheel, taking advantage of the fact that there are six humps in one revolution of the camshaft. This is…

img210 The testing of a camshaft-driven air pump for a four-wheel brake scheme.
View original record To Hs. from E. c. to CJ. BRAKE AIR PUMP DRIVE HERON 'VULTURE' E1/14.10.22. X.3454 X.3850 X.3423. RE. TESTING AIR PUMP DRIVEN BY CAMSHAFT. We send you herewith confirmation of our telegram to you of…

img211 Continued document page discussing humps on one revolution of the camshaft, referring to original sketches.
View original record 69 CONTD:- -2- humps on one revolution of the camshaft. This is illustrated below :- See original for sketches. E.

img212 The fitting of trough-type side carriers and Barker design dipping head lights to specific car models.
View original record To HS. from DA/EV. c.c. to EY. RE. 6. EX. Y3923 / Y4555 X.4085 We note that you are fitting side carriers for the spare wheels similar to our scheme for the Goshawk - N.Sch.1249, which is of the…

img213 The completion of front-wheel brake designs and the potential move to a mechanical servo system.
View original record PWW1 NEW MODELS, PNEUMATIC, FWB DESIGNS COMPLETED. 'HERON' 'VULTURE' To CJ. & BJ. from R. c. to Wor. c. to BY. c. to Hs. c. to Wd. R4/M9.10.22. X.4428 X.4550. I believe we have now completed the…

img214 Completion of front wheel brake designs and the possibility of changing from a compressed air to a mechanical servo system.
View original record DESIGNS COMPLETE 6 CHASSIS FWB, ORIGINAL PROTECTED, HERON R URGES CONSTRUCTION, COMP, AIR SYSTEM HINTS AT POSSIBLE NEED TO CHANGE TO MECHANICAL SERVO. To Ed. & R.J. from R. C. to RMH. C. to HY. C. to…

img215 Accompanying drawing Lec.1639, detailing an automatic air pump cut-out device for the 'Heron' model's four-wheel brakes.
View original record AUTO PNEU. CUTOUT FWB HERON To BY. from E. c. to CJ. Hs. E2/M12.10.22. AIR PUMP CONTROL DEVICE FOR FOUR WHEEL BRAKES ON "HERON". X.3836 X.3850 X.4550. We send you herewith drawing No.Lec.1639 shewing…

img216 Drawing Lec 1639 for an air pump control device on the 'Heron'.
View original record To. By. from E. c. to CJ. Hs. ORIGINAL RECEIVED 4 S 1922 E2/M12.10.22. AIR PUMP CONTROL DEVICE FOR FOUR WHEEL BRAKES ON "HERON". X3836 Y3850 X4550 We send you herewith drawing No. Lec 1639 shewing the…

img217 Clarifying the codenames 'Heron' and 'Seagull' for experimental chassis, later known as the Phantom I.
View original record To BY. from E. c. to hs. [Handwritten annotations] Std 40/50 CHASSIS WITH FWB = 'HERON' OHV 4 3/4" BORE (the next & only other) more = SEAGULL E1/M12.10.22. LATER TO BECOME PHANTOM I X.3548. [Typed…

img218 Assigning the codenames 'heron' and 'seagull' to two experimental chassis.
View original record To Hy. from E. c. to Hs. NOMENCLATURE OF EXPERIMENTAL CHASSIS. Y3548 Re the above kindly note that we understand the four wheel brakes chassis with 40/50 engine should be called the "heron", and the…

img219 Modifications for the 'Stork' pneumatic brakes system, including diaphragm trips and dashboard adjustments.
View original record TO BY. FROM DA. C. TO CJ. C. TO HS. ✓ ORIGINAL RECEIVED 1922 STORK DA1/14.10.22. FWB (PNEU) "STORK" PNEUMATIC BRAKES. X3836 X4561 We send herewith N. sch. 1337 shewing the diaphragm trip on the…

img220 Modifications for the pneumatic brake system on the 'Stork' model.
View original record To BY. from Da. c. to CJ. c. to Wor. c. to Hs. PNEUMATIC FWB on 'STORK' Dal/M14.10.22. "STORK" PNEUMATIC BRAKES X.3836 X.3850 X4561 X.4850 We send herewith N.sch.1337 shewing the diaphragm trip on the…

img221 Cancellation of pneumatic brakes and the decision to proceed with experimental air brakes for a four-wheel braking system.
View original record STAMP: SH 20 IX 1922 FROM DA. c. to Ed. c. to WOH. c. to HS. [Handwritten Note Start] FWB PNEU. TYPE STOPPED BY R [Handwritten Note End] FOUR WHEEL BRAKES. [Handwritten] X9940 X4561 We understand from…

img222 Adjustments to the cams of the front wheel brakes.
View original record FWB CAMS HERON AIR BRAKE FWE To BY. from Da. c. to CJ. c. to Wor. c. to Ms. Da2/M19.10.22. "HERON" FOUR WHEEL BRAKES X.4550. We send herewith No.sch.1340 shewing the proposed adjustment on the cams of…

img223 Shackling of front springs in conjunction with front wheel brakes, requesting a test on a Goshawk model.
View original record TO HS. FROM R. c.c. to DA. c.c. to BY. Handwritten: SHACKLES AT FRONT FWB ORIGINAL OF FRONT SPRINGS? TRY ON GII CAN HY HELP? STEERING & FRONT WHEEL BRAKES. In conjunction with steering and front wheel…

img224 Drawings for an air pump for four-wheel brakes, noting a required modification to springs.
View original record ORIGINAL E1/M19.10.22. RECEIVED 18 OCT 1922 TO C.C. FROM H.S. c. to H.S. "HERON" - AIR PUMP FOR FOUR WHEEL BRAKES. X3150 X4550 We send you herewith drawings Nos. Lec^t 1641 & 1643 shewing respectively…

img225 Experimental implementation of pneumatic brakes on the 'HERON' chassis.
View original record TO HY. FROM DA. c. to EU. c. to RM. c. to HS.✓ ORIGINAL PNEU FWB CARRY ON DAA/M1.11.22. RECEIVED NOV 3? 1922 X9940 "HERON" - PNEUMATIC BRAKES. X9581 We have heard from Mr. Royce this morning that it…

img226 Modifications to the 'Heron' model's front wheel brakes and new engine feet.
View original record TO DY. FROM DA. C: to Gd. C: to WOR. C: to HS. ✓ ORIGINAL RECEIVED 18 NOV 1922 HERON FWB DA1/M17.11.22. "HERON" FRONT WHEEL BRAKES. X 9940 Please receive N.Sch. 1352 shewing the carrier lever for the…

img227 Heron four-wheel brakes, specifically the hand brake operating gear and servo motor.
View original record To BY. from Da. c. to CJ. c. to Wor. c. to Hs. 13548 Da/M18.11.22. HERON FOUR WHEEL BRAKES X.4850. Please receive N.sch.1351 shewing the hand brake operating gear and some preliminary information…

img228 Revised pedal gear for the 'Stork' model, compatible with either pneumatic brakes or a new servo system.
View original record REVISED PEDAL GEAR FOR PNEU OR NEW SERVO. STORK To BY. from Da. c. to CJ. c. to Wor. c. to hs. 75548 Da1/M19.10.22. "STORK" PEDAL GEAR. X.4135 We send herewith A.sch.1338, shewing the revised pedal…

img229 26-point list of work required for the 'Stork' (air brakes) and 'Heron' (servo brakes) chassis models.
View original record [Handwritten Heading:] 40/50 PNEU. BRAKES - HERON SERVO BRAKE - STORK. To E. and BY. from Da/EV. [Handwritten correction: 40/50 written above a struck-through 40/60] Da/Ev1/M8.11.22 c. to hs. RE.…

img230 The 'Heron' servo motor for brakes, including a design scheme and material suggestions.
View original record TO-BY. FROM DA. c. to O.J. c. to WCR. c. to HS. AIR HERON FWB "HERON" - SERVO MOTOR FOR BRAKES. X3867 We send you herewith M.Sch. 1350, shewing the arrangement of Servo motor on the 3 speed gearbox.…

img231 Design, materials, and manufacturing of a servo motor for brakes on a 3-speed gearbox.
View original record FWB SERVO MOTOR- HERON ON 3-SPEED G/BOX 3-SPEED COPY To BY. from Da. c. to CJ. c. to Wor. c. to Hs. Da2/M22.11.22. HERON - SERVO MOTOR FOR BRAKES. We send you herewith N.sch.1350., shewing the…

img232 Conclusions from an investigation into front spring anchorage and steering geometry.
View original record FRONT SPRING ANCHORAGE ORIGINAL AT REAR (SHACKLES AT FRONT) TO - DA. FROM R. c. to GJ. c. to DY. c. to HS. ✓ c. to MP. (2) The following conclusions are the result of investigations up-to-date:- (1)…

img233 Steering mechanism improvements with semi-irreversible steering for Goshawk, Heron, and Seagull models.
View original record (2) (6) When we are able to dispense with elasticity in the steering connections the control of the front wheels becomes much more definite, and we can also then adopt semi-irreversible steering, (by…

img234 'Seagull' engine's capacity, bore, and stroke dimensions.
View original record R.R. 238m (100 T) (S.H 798 10-12-20) G. 2948 TO EFC. FROM E. ORIGINAL E6/M19.12.22. R 3 RE. "SEAGULL". In reply to your query regarding the capacity of the "Seagull" engine, this is for all practical…

img235 Capacity and specifications of the 'Seagull' P1 prototype engine.
View original record ENGINE BORE & STROKE SEAGULL 4 1/4 x 5 1/2 E6/M9.12.22. To EFC. from E. X.3548 - RE "SEAGULL" - P1 PROTOTYPE In reply to your query regarding the capacity of the "Seagull" engine, this is for all…

img236 Request for information on the weight of the Goshawk engine and the 40/50 to estimate the weight of the 'Seagull' engine.
View original record R.R. 238a (100 T) (S.H. 798 10-12-20) G. 2048 TO HS. FROM E. ORIGINAL E5/MS.12.22. R RE. WEIGHT OF "SEAGULL" ENGINE. X9920 In accordance with Mr. Royce's wishes would you kindly send us information…

img237 Telegram from Basil Johnson to Hives requesting particulars on the differences between the Lark, Heron and Seagull projects.
View original record POST OFFICE TELEGRAPHS. B or C 3. Hs. Prefix GERRARD. Office of Origin and Service Instructions [Stamped: HAYES MIDDX 20 XII 22 12 40 PM]. No. of Telegram 27. Sent 12.31 M. To 1320. Office Stamp…

img238 Development of the Goshawk and Seagull models, specifically the axle and gearbox design.
View original record Early work on SEAGULL, PII prototypes R ORIGINAL TO R.J. FROM R. c.c. to C.J. WOR. c.c. to HY. HS. ✓ HS R1/M21.12.22 DEC 27 1922 RECEIVED Y3730 Y9810 X4219 GOSHAWK, SEAGULL, ETC. With reference to the…

img239 Gearbox and axle redesigns for the Goshawk and Seagull models, noting progress on experimental production.
View original record (2) bearings along the shafts. Both these units, we believe, if once made silent, will remain so, in fact our experience is, especially with the gearboxes, that they become more silent with running.…

img240 Induction pipe arrangements for various engines and proposing fuel distribution tests.
View original record S.R. 235a (100 T) S.H. 159 (1-8-20) G. 2800 INDUCTION PIPES - H-N o SEAGULL ORIGINAL TO HS. EY. FROM R DEC 29 1922 c. to CJ. BJ. RG. RECEIVED RE. HAWK-NORTHCLIFFE R5/M27.12.22. X3408 X4305 We are very…

img241 Relocation of the brake servo motor to the right-hand side of the gearbox for the 'Heron' model.
View original record BRAKE SERVO MOVED TO R.H. SIDE OF G/BOX HERON. TO BY. FROM DA. c. to CJ. c. to WGR. c. to HS. "HERON". We send you herewith N. sch. 1341. This shews a good many of the principle features on the…

img242 Urgent requirement for a body for the 'Stork' and 'Heron' chassis.
View original record To Da. from Hs. BODIES FOR STORK & HERON Hs4/LG6.1.23. BODIES FOR "STORK" AND "HERON". We consider it is very urgent that we should order a body suitable for the Stork or Heron chassis. We are hoping…

img243 The preparation and selection of car bodies for 'Stork' and 'Heron' models.
View original record Now AT. Camacho, W.Wittering. BODIES FOR STORK HERON To hs. from Da. Dal/MS.1.23. BODIES FOR "STORK" & "HERON" X.4113. Replying to Hs4/LG6.1.23., we are setting out an open touring body for "Stork"…

img244 Proposal for a light speed body for 'Stork' and 'Heron' models.
View original record A LIGHT SPEED BODY FOR STORK HERON X,4118. To BJ. & hs. from R. R10/M10.1.23. X.4113. We propose having made under Derby control a light speed body for use with "Stork" and "Heron". A print of the…

img245 Assessing the condition of car 6-EX, noting noisy gears and mentioning future models 'Stork', 'Heron' and 'Seagull'.
View original record To Hs. from R. c. to BJ. R's 2nd PWW I 40/50, AN EXCELLENT CAR BUT ALL GEARS TOO NOISY. 6 EX R7/M10.1.23. 6-EX CAR. X.3923 X.3548. This is an excellent car, but could be slightly less noisy in the…

img246 Proposal for a sports touring body to be fitted to the 'Stork' and 'Heron' chassis, detailing modifications and features.
View original record K.4113 SPORTS BODY FOR STORK DA/EVL/M13.1.23. To BY. & Hs. from Da/Ev. GOING TO FRANCE SOON. PARK WARD! HERON RE. BODY FOR "STORK" & "HERON". K.4113. We enclose N.schs. 1369 & 70 shewing what we think…

img247 Car finish, color schemes, wheel specifications, and preferred coachbuilders.
View original record CONTD: -2- jack etc. can be carried together with a tin of spare oil, as we wish no side oil tank to be fitted. Concerning the finish of the car we think this should be smart and attractive, with…

img248 Front axle pivot lean and steering inclination on Stork and Heron models.
View original record To HS. from DA. c. to BY. FRONT AXLE PIVOT LEAN ON STORK & HERON X 40/50 - GENERAL PHILOSOPHY. RR & DELAGE RE. FRONT AXLES. X.4647 X.4264 X.3525 X.3465 We recently had a request from BY's Dept. asking…

img249 Query requesting particulars of a steering mechanism to investigate stiffness and for comparative calculations.
View original record 94 contd:- -2- Could you confirm this and could you at the same time give us particulars as to the pitch, diameter, linear pitch of the worm, number of starts in both worm and wheel so that we can…

img250 Development policy for future experimental car models 'Heron' and 'Seagull'.
View original record DEV'T POLICY of HERON SEAGULL FUTURE 40/50 To CJ. from R. c. to BJ. c. to Wor. c. to Da. c. to EY. c. to HS. RE. EXPERIMENTAL CARS X.3548 X.2555 X.4428. During Mr. Wormald's visit to WW. on the 16th.…

img251 Policy statement on fitting front wheel brakes to the 40/50 chassis.
View original record contd:- -2- This policy is necessary and favourable for fitting the front wheel brakes at an early date to the present 40/50 chassis. R.

img252 Confirming the decision to halt design work on the Heron chassis and prioritize the Seagull project.
View original record PNEU FWB HERON WOUND UP. [STAMP: RECEIVED 4 MAY 1923 H.S] Mr Booth. Mr Plaeth. c. Hs. Mr Coverley. BY4-P18.1.23. HERON. With reference to the front wheel brake proposal as embodied in the two chassis,…

img253 Future development strategy for the 40/50, Heron, and Seagull models.
View original record R - TO DEVELOP 40/50 FURTHER 40/60 X.3548. HERON OR NOT? 6EX IS SO GOOD! SEAGULL WOR SAYS 'YES', R PASSES THE BUCK TO CJ. R8/M19.1.23. To CJ. from R. c. to CJ. LHS. c. to Wor. BY c. to Hs. EP. c. to…

img254 Proposed sports body for the 'Stork' chassis, its suitability for other models, and the coachbuilding process.
View original record PROPOSED SPORTS BODY FOR STORK To BJ. from Hs. WILL ALSO SUIT A PRESENT c. to LHS. LONG-CHASSIS 40/50. Hs3/LG20.1.23. GET C/BUILDERS ESTIMATE RE. BODY FOR "STORK" CHASSIS. R - PARK WARD. We send you…

img255 Production of a speed body for the 'Stork' project, involving Park Wards and other coachbuilders.
View original record SPORTS BODY TO GO AHEAD STORK. SECURITY ? Da/Ev. from Hs. Hs2/LG20.1.23. RE. SPEED BODY FOR "STORK". With reference to the speed body for the "Stork". The position of this at the present time is that…

img256 Private internal memo regarding the sourcing of a new sports body for the 'Stork' chassis and the necessary confidentiality required with coachbuilders.
View original record SPORTS BODY-STORK Private. To Hs. from BJ. Copy to IHS. EJ1/H23.1.23. BODY FOR STORK CHASSIS. 1. It seems very necessary that in getting any body built by a coachbuilder for any future chassis, we…

img257 Clarifying a body design is for experimental purposes and requires committee consideration for permanent adoption.
View original record -2- make it quite clear that it is not intended to be one of our standard bodies, but only for experimental purposes, as if they are considering our permanent sports body, the whole design would have…

img258 The decision to abandon the 'Stork' and 'Heron' models and repurpose their parts for the 'Seagull' model.
View original record 'R' - TO BE ABANDONED FOR COMMERCIAL REASONS X.3548 STORK HERON To Wor & BY. from R. c. to CJ. BJ. EP. c. to Hs. Da. E. CONFIDENTIAL. SEAGULL PROGRESS X.3548. For commercial reasons it has been…

img259 Testing a front axle with brakes on the 'Stork' chassis and a pneumatic brake mechanism.
View original record Hs. - R to SEE FRONT AXLE AT W.W. THEN BUMP IT - (ADDED UNSPRUNG WEIGHT PROBLEMS) - WASTED EFFORT & MATERIAL - CAN WE ASSEMBLE & TRY IT? STORK To R. from hs. c. to CJ. c. to BJ. c. to Wor. c. to BY.…

img260 To stop work on the Heron & Stork projects and prioritize the Seagull P1 prototype.
View original record BY- HERON & STORK STOPPED HERON SEAGULL (P1 PROTOTYPE) STORK SEAGULL PUSHED ON WITH UTMOST SPEED ___ Dept. ___ " ___ " C. Wor. C. Hs. STORK & HERON. Will you kindly note that I have received…

img261 Basic tests for engine torque reaction and vibrations.
View original record R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. BASIC TESTS, ENGINE TORQUE REACTION / VIBRATIONS EXPERIMENTAL REPORT. Expl. No. REF: H.5/A.C23.9.33 To R. from Hs. c. to GJ. c. to E. c. to Da. c. to HY.…

img262 Measuring engine torque and fitting a spring-controlled friction damping system.
View original record R.R. 493A (40 H) (SL 42 12-7-23). J.H.D. 110 EXPERIMENTAL REPORT. Expl. No. REF: Hs5/LG22.9.23. that some was going through the frame. We therefore measured the torque through a spring balance (as in…

img263 Various design schemes sent out, including ignition wiring and torque reaction dampers.
View original record SCHEMES FOR ENGINE TORQUE REACTION DAMPERS 40/50 E.A.C. To HY. from R. HS. R2/M13.10.23. c. CL. BJ. SECRET. X.9770. X.9560. X.9950. X.4604. We have sent you this week the following schemes (complete…

img264 Solutions for exposed valve stems and tappets on chassis 12-EM after a 10,000-mile trial run.
View original record Handwritten top: EXPOSED VALVE STEMS & TAPPETS ON 40/50 - ENCLOSURE SCHEME CROWDED OUT TO HM. FROM E. Copy to BJ. HS. re. 10,000 MILES TRIAL RUN. CHASSIS No. 12-EM. Handwritten top right: X4601…

img265 Secret memorandum outlining a visit to W.W. with several cars and components for testing and approval.
View original record X1698 (handwritten) 40/50 pld (handwritten) To R. from Hs. c. to CJ. BJ. c. to E. DA. c. to SY. Wor. S E C R E T. Hs7/LG17.10.24. VISIT TO W.W. X1698 / X4219 X9770 (handwritten) We propose arriving at…

img266 From CJ to Hs asking for details about a meeting with Mr. Royce in West Wittering.
View original record Typed Text: To Hs. from CJ. CJ11/E28/4/25 I note that last week you saw Mr.Royce at West Wittering. Did anything transpire which is of interest to the Administration? CJ. Handwritten Text: X1698 Ha…

img267 From Hs. to C.J. detailing a visit to West Wittering to test cars and discuss steering, coupling, and brake issues.
View original record To C.J. from Hs. VISIT TO WEST WITTERING. During my visit to WW. last week, I took to R. an EAC. 'V' series open touring car which was practically identical to the first production cars. We also took…

img268 Modifications to the bonnet and radiator line on the 1st Phantom I Experimental chassis (7EX) following criticism from Mr. Royce.
View original record 1ST PHANTOM I EXP (CHASSIS) ORI(FOR R) 7EX TO BY. FROM DA. DA2/M6.7.25. COPY TO - HS. 7.EX. Mr.ROYCE'S CAR. X8770 X8250 8260 The line of the bonnet and radiator was criticised by Mr Royce on Sat. and…

img269 Recommendation concerning the retention, testing, and disposal of various American cars.
View original record Handwritten notes: X 4212 Post War Policy Hs steering ø Typed content: To Wor. from Hs. Hs9/LG23.11.20. X.1692. X.3317. RE AMERICAN CARS. I recommend that we should retain the Marmon and the Buick…

img270 Heating of the carburation system for the 40/50 HP chassis.
View original record R.R. 253A (100 Tks) G.S.H. 169. 11-8-20 G 2800 X4212 To E. from Hs/TMW. Hs/TMW2/LG3.1.21. X.4305. X.421.2 X.1692. RE HEATING OF CARBURATION SYSTEM. 40/50 HP. CHASSIS. With reference to the first…

img271 Engine starting difficulties in cold weather, issues with direct gear starters, and the design of a 3-speed gearbox.
View original record C for '3 & 4 Speed G/Box' War (3) (12) It should be clearly understood that our engine is a large engine and having very close fitting pistons (so that it shall run silently without piston knocks) and…

Copyright Sustain, All Rights Reserved.    whatever is rightly done, however humble, is noble