Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | The 10,000-mile bench test of a Delco-Remy distributor. | ||
| View original record | WB.80. 26th March, 1926. X.4284. DELCO-REMY DISTRIBUTOR. This unit has now completed a 10,000 mile bench test in conjunction with the nearly closed iron circuit Delco coil supplied with it. During the… | ||
| Scan002 | Observations on the Remy distributor, comparing its oil-clearing design to the standard distributor which suffers from pitting. | ||
| View original record | WB.87. 19.5.26. X. 4284. REMY DISTRIBUTOR, During some observations of the Remy distributor in the laboratory it was noticed that the contact points were considerably offset from the cam. Any oil… | ||
| Scan003 | Observations and tests on a Delco-Remy contact breaker unit and ignition coil. | ||
| View original record | To R. From EFC. c. BJ. By. EFC/21.7.26. RE DELCO REMY IGNITION. Recently we obtained from The Delco Remy Co. a Delco-Remy contact breaker unit with nearly closed iron circuit coil, on which apparatus… | ||
| Scan004 | The magnetic properties of coils and a reference to an attached letter regarding contact points. | ||
| View original record | Contd. -2- EFC1/21.7.26. -2- We ourselves do not think there is a great deal in coils with nearly closed magnetic circuit. In any case if there is, the longer a straight coil is made, the more nearly… | ||
| Scan005 | Tests and specifications for Phantom side steering tube springs. | ||
| View original record | To B.J. From Hs/Rm. c. to Wor. PN. c. to CWB. EY. c. to EP. MX. ORIGINAL. Hs/Rm/L.G.7.7.26. PHANTOM - SIDE STEERING TUBE SPRINGS. 48430 / 48450 We believe that, for a number of reasons, tests at… | ||
| Scan006 | Page discussing spring load calculations, featuring a cut-out engineering blueprint of a spring assembly. | ||
| View original record | contd :- -2- unacquainted with the job should consider .188 as applying to all springs and fit them accordingly. This would mean that the static load on the ball end with 2520 lbs. springs would be… | ||
| Scan007 | Analysis of spring performance and manufacturing tolerances related to the side steering tube. | ||
| View original record | contd :- -3- Then the ball load with the stronger springs is only 280 lbs. and with the weaker springs 350 lbs. As a matter of fact the errors need not be so great as those indicated above because in… | ||
| Scan008 | Continued discussion on side steering tube lubrication, assembly, and spring strengths. | ||
| View original record | contd :- -4- to the method of lubrication and assembly, friction is a widely varying factor. If all side steering tubes fitted up with one strength of spring gave results which did not vary by more… | ||
| Scan009 | Steam heating for the induction pipe on Phantom engines and a proposal to fit the arrangement to car 7-EX. | ||
| View original record | To R.J. from Haxk. c. to BJ. Wor. c. to RG. E. c. to DA. BY. c. to OY. ORIGINAL. Hs5/LGS.7.26. X8080 X8230 CARBURETTER THROTTLE HEATING ON PHANTOM ENGINES. Except for the time taken for the initial… | ||
| Scan010 | Continued experiments with the superheated throttle system for carburetter heating on Phantom engines. | ||
| View original record | To R. from Hs/ACL. c.c. to BJ. Nor.✓ c.c. to RG. E.✓ c.c. to DA. EY.✓ c.c. to OY. Hs/ACLl/LGS.7.2.26. CARBURETTER THROTTLE HEATING ON PHANTOM ENGINES. We have continued experiments with the… | ||
| Scan011 | Analysis of exhaust system configurations for quick warming, including a performance graph. | ||
| View original record | contd :- -2- (2) Standard without the exhaust butterfly. (3) Standard with the outlet pipe from hot spot leading directly into the atmosphere and no butterfly valve. (4) Superheat system with .062… | ||
| Scan012 | Performance graph and analysis comparing the rate of heating of a superheat system versus a standard exhaust system. | ||
| View original record | contd :- -3- MANIFOLD. USUAL POSITION To HOT SPOT The next curves give the rate of heating with the super-heat system; the standard exhaust curve being inserted for comparison. The heating rate is… | ||
| Scan013 | Test report page detailing experiments on a heated system, boiler, and engine cooling system. | ||
| View original record | contd :- -4- heated system after the same time, but it soon assumes a constant value of 95°C, while the other still continues to rise rapidly. The temperature figures given on these curves are… | ||
| Scan014 | Report page detailing experiments on a superheat system with data on boiler performance and throttle heating. | ||
| View original record | contd :- -5- 2000 R.P.M. full throttle. | Boiler feed hole. | Water flow through into boiler lbs/min. | B.T.U's/min. added. | % of heat added to total heat flow under these conditions. | | Full bore.… | ||
| Scan015 | System capacity, cooling, and circulation issues related to a boiler and exhaust-heated system. | ||
| View original record | contd :- -6- capacity of the system by decreasing the boiler size, but keeping the heating area the same. With a small water feed to the boiler there should be little or no heat added to the cooling… | ||
| Scan016 | Examination of the change speed mechanism on a 12-EX car, identifying a binding issue due to a distorted tubular support and trapped oil. | ||
| View original record | To R. from Hs/GWH. c. to BJ. Wor. c. to RG. E. c. to DA. BY. ORIGINAL Hs/GWH1/LGS. 7.26. RE. CHANGE SPEED MECHANISM ON 12-EX CAR - TO ARRGT. G.74299. X7320 We examined the change speed mechanism and… | ||
| Scan018 | Proposing the delivery of car EAC-1 for inspection, detailing its current state and planned modifications. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to RG. E. c. to DA. ORIGINAL Hs3/LG13.7.26. EAC-1 CAR. X8920 X235 Although we have not yet fitted the hydraulic dampers to the rear of this car, we propose bringing… | ||
| Scan019 | Nine modifications to the 12-EX car before a 10,000-mile test in France. | ||
| View original record | To R. from Hs. c.c. to B.J. Hor. ✓ c.c. to RG. E. ✓ c.c. to DA. HY. ✓ ORIGINAL. Hsl./LG13.7.26. 12-EX CAR. NEXT CAR FOR 10,000 MILES IN FRANCE. X7940 X7770 We expect to have this car running fitted… | ||
| Scan020 | Description and analysis of the Auto-Pulse Electro-Magnetic Petrol Pump from the U.S.A. | ||
| View original record | To R. from EFC. c. to - BJ. Wor. By. Rg. Oy. EP ORIGINAL AUTO-PULSE ELECTRO-MAGNETIC PETROL PUMP. X3800 A single and a duplex unit of the Auto-Pulse petrol pump were brought over from U.S.A. by Mr.… | ||
| Scan021 | Laboratory test results for a single petrol delivery unit under various conditions. | ||
| View original record | Contd. -2- EFCl/T13.7.26. We have made laboratory tests of the single unit with two different suction heads of 46" and 22" respectively of petrol. For each suction head we have taken the head-delivery… | ||
| Scan022 | Page 3 of a continued document detailing an objection considered during work on a car. | ||
| View original record | Contd. -3- EFC1/T13.7.26. sufficient to be considered an objection when at work on the car. EFC. | ||
| Scan024 | Technical bulletin for the 'Autopulse' electric fuel pump covering its service, capacity, life, efficiency, and operation. | ||
| View original record | Page 7 (Column 1) ...may be made with the vehicle, increasing the power delivery until lack or a sufficient supply of fuel is indicated with each unit; thus comparing their capacity and functioning.… | ||
| Scan026 | Results of using accelerometers to measure riding comfort and discomfort levels for the Phantom suspension. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to E. Da. c. to By. Oy. c. to PN. CWB. ORIGINAL PHANTOM SUSPENSION. X8410 X235 We have spent a certain amount of time trying to evolve a satisfactory instrument for… | ||
| Scan027 | Comparing ride comfort using a water test, noting the superiority of the front ride in a 40/50 model. | ||
| View original record | Contd. -2- on English roads at moderate speeds. Owing to the unreliability of comparisons with accelerometers, we have reverted to the water test which continues to confirm our physical sensations. We… | ||
| Scan028 | High-speed tests comparing the riding performance of hydraulic and standard friction dampers on various car models. | ||
| View original record | Contd. -3- Hs/Rml/T15.7.26. We are quite aware that this slow speed work makes shock dampers appear unnecessary, and in order to shew up the relative merits of suspensions and dampers we are… | ||
| Scan030 | Test results for white metal bearings, examining load carrying capacity in relation to speed and bearing length. | ||
| View original record | To R. from Hs/Rm. c.c. to BJ. Wor. ✓ c.c. to RG. R. c.c. to DA. EY. ✓ ORIGINAL. Hs/Rm2/LG15.7.26. WHITE METAL BEARING TESTS. +4633 Increase of load carrying capacity with decreasing speed. We have… | ||
| Scan031 | Bearing failure pressure specifications and diagrams for two different bearing lengths. | ||
| View original record | contd :- -2- Bearing - inside dia. - 1.400". Shaft speed - 1900 r.p.m. Oil pressure - 25 lbs/sq.in. Length of bearing. | Pressure/sq.in. internal projected area under which the bearing fails. 'A'… | ||
| Scan032 | Preliminary test results for a new oil relay, including issues with piston ring friction and initial advance settings. | ||
| View original record | To R. from Hs/Rm. c.c. to EJ. Wor. c.c. to RG. E. c.c. to DA. BY. ORIGINAL Hs/Rml/LG19.7.26. OIL RELAY. X8685 We have carried out some preliminary tests on the new type of oil relay with the altered… | ||
| Scan033 | Test report and analysis of a 6-cylinder Bentley car, focusing on its suspension, power, and performance. | ||
| View original record | To R. From Hs. c.c. to BJ. Wor.✔ c.c. to RG. E.✔ c.c. to DA. EY.✔ c.c. to PN. CWB. ORIGINAL Hs2/LG23.7.26. X8771 X3805 6-CYLINDER BENTLEY CAR. We have had an opportunity of testing a 6-cyl. Bentley… | ||
| Scan034 | Continued report detailing issues with a vehicle's noise, slow running, clutch, steering, and cooling systems. | ||
| View original record | contd :- -2- The makers recommend the car should only be run on 50% benzole mixture. (3) SILENCE. There was a fair amount of noise from the engine. This came from valve operation, piston knocks,… | ||
| Scan035 | Report page detailing vehicle issues including water loss, engine vibration, brakes, and oil consumption, with an owner's comparison to a Bentley. | ||
| View original record | contd :- -3- He also stated that the car lost a considerable amount of water and had to be filled up every day. We should anticipate that they will have trouble with over-heating. The bonnet has 4… | ||
| Scan036 | Blueprint graph comparing the acceleration performance of various Rolls-Royce and Bentley 6-cylinder cars. | ||
| View original record | COMPARISON OF R.R. AND BENTLEY 6 CYL CARS ACCN. FT/SEC² ROAD SPEED M.P.H 6.5 LITRE BENTLEY STANDARD PHANTOM TOURER BENTLEY READINGS x x x SPORTS PHANTOM 10 EX | ||
| Scan037 | Test report on overheating in the interior of Phantom cars, detailing temperature changes with different silencer lagging configurations. | ||
| View original record | To R. from Hs/AJL. c. to BJ. WOR. c. to E. DA. c. to BY. ORIGINAL Hs/AJL/T9.8.26. X8830 X.819 OVERHEATING IN THE INTERIOR OF PHANTOM CARS. We have carried out tests on the above. The tests were… | ||
| Scan038 | Recommendations for using sheet asbestos for heat insulation on floorboards and subframe cross members. | ||
| View original record | Contd. -2- Hs/AJL1/T9.8.26. at present. Better results than those obtained by lagging the silencer can be obtained by a fixed sheet asbestos to the underside of the rear compartment floorboards. In… | ||
| Scan039 | Results of torsion tests conducted on front springs. | ||
| View original record | [STAMP] ORIGINAL To R. from Hs/Rm. c.c. to EJ. Wor. c.c. to RG. E. c.c. to DA. BY. c. to oy. Hs/Rm3/LG10.8.26. TORSION TESTS - FRONT SPRINGS. X3854 X4429 We have carried out a considerable number of… | ||
| Scan040 | Diagram showing the contour of a spring under torsion and load. | ||
| View original record | SPRING CONTOUR UNDER TORSION SHACKLE ANGLE BEFORE TORSION 21° " " AFTER " " 18.5° WITH 1100 LBS LOAD WITH TORQUE GIVING 6° LEAN T SHOWING THE SHAPE ASSUMED BY A WOODHEAD SPECIAL SPRING MAIN LEAF,… | ||
| Scan042 | Comparison between reversed and rebound leaf springs, analysing internal friction, spring life, and riding advantages. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to RG. E. c. to DA. EY. REVERSED AND REBOUND LEAF SPRINGS. X3854 X2628 X3805 X4048 We have been making some comparisons between the reversed leaf spring as fitted to… | ||
| Scan043 | Graph plotting deflection against total load for Lancia reversed leaf springs. | ||
| View original record | LANCIA REVERSED LEAF SPRINGS. 3 REVERSED LEAVES. REVERSED LEAVES DEFLECTION INS. TOTAL SPRING LOAD LBS. EXTN. COMPRN. INTERNAL FRICTION APPROX 150 LBS. 8 6 4 2 0 300 600 900 1200 1500 1800 | ||
| Scan045 | The failure of a Silver Ghost chassis frame on chassis 5-AU and 6-EU. | ||
| View original record | To R. from Hs. c.c. to BJ. Wor. c.c. to E. DA. c. to EY. ORIGINAL. Hs2/LG13.8.26. X9380 CHASSIS 5-AU AND 6-EU. FAILURE OF SILVER GHOST FRAME. Below is a report we have received from Hs/Rn. (ref.… | ||
| Scan046 | Report discussing a frame fracture on two 'Silver Ghost' chassis, comparing chassis 6-EU with 5-AU. | ||
| View original record | contd :- -2- therefore lie forward of the sphere supporting cross member. We have suggested that if anything, the frame material is at fault, and at the first opportunity a section will be sent to 'W'… | ||
| Scan047 | Diagram showing two views, a side view and an inverted plan, of a broken vehicle frame. | ||
| View original record | BROKEN FRAME 5-AU. REAR. FRONT Frame broken here bottom of channel. <- Front of car. O.S. frame fracture. Rear of car. Running into bolt hole. Not quite to outside of frame & vertical channel.… | ||
| Scan048 | Experiments to determine the reason for explosions in the silencer on the Phantom model. | ||
| View original record | To R. from Hs/ACL. c.c. to EJ. Wor. c.c. to RG. E. c.c. to DA. BY. c.c. to OY. ORIGINAL hs/ACL1/LG13.8.26. X8230 X930 X8080 EXPLOSIONS IN SILENCER ON PHANTOM. We have carried out some experiments with… | ||
| Scan049 | Analysis of the cause of continuous explosions in the exhaust when an engine is coasting with the throttle slightly open. | ||
| View original record | contd :- -2- Hs/ACLL/LG13.8.26. ------------------ By these means we were able to reproduce the trouble laid down in each of the afore mentioned cases. From general observation of the first tests with… | ||
| Scan050 | Experimental test results on engine performance with altered exhaust, throttle, and mixture settings. | ||
| View original record | contd :- -3- We put forward some experimental test results in support of the above theory. One exhaust manifold was removed to give a clear view through the exhaust ports. The engine was motored over… | ||
| Scan051 | Analysis of engine explosions in the exhaust manifold under different throttle and carburettor settings. | ||
| View original record | contd :- -4- For the next experiment the engine was motored at 1000 r.p.m. with the carburetter mixture control normal and the throttle adjusted until explosions took place in the exhaust manifold and… | ||
| Scan052 | Analysis of silencer explosions related to throttle operation and fuel system behavior. | ||
| View original record | contd :- -5- dilution as in the other cases. A certain amount of fuel will line the induction system, particularly so if fairly wide throttle and low speed has been used previously. Closing of the… | ||
| Scan053 | Investigation into steering troubles on the 12-EX car. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to BY. ORIGINAL. Hs1/LG13.8.26. 12-EX CAR - STEERING. K7430 X-7940 Hs/Rn. has gone to France to investigate the steering troubles reported on the above… | ||
| Scan054 | Testing and production costs of a narrower brush type dynamo. | ||
| View original record | ORIGINAL To R. from EFC. c. to BJ. E. c. to Da. HY. c. to Wor. X.8671 - EAC. DYNAMO OF THE NARROWER BRUSH TYPE. Referring to your R2/M25.6.26, we have now two of these dynamos running under working… | ||
| Scan055 | Investigation into an occasional failure of a sequence starter. | ||
| View original record | To R. from EFC. c. E. Hs. EFC2/T17.8.26. X7620/50 RE SEQUENCE STARTER. In answer to your HL/M13.8.26, we had already investigated the starter on the lines you suggest so far as is possible in position… | ||
| Scan056 | Continued discussion on the design of a starter motor, covering push-button operation, winding specifications, and potential jamming. | ||
| View original record | To R. Contd. ----------------- -2- EFC2/T17.8.26. ----------------- end pressure from the solenoid. It has always appeared to me that we have got to use a comparatively heavy teazer current to be safe… | ||
| Scan057 | Further trials investigating starter motor jam issues by varying voltage and torque. | ||
| View original record | EFC2/T17.8.26. -3- Contd. stated, so far that does not appear to have been wrong. Since your note we have made further trials, but this time we have increased the teazer torque by the application of a… | ||
| Scan058 | Altering teeth, helix angles, and teazer current to resolve a jamming issue. | ||
| View original record | EFC2/T17.8.26. -4- Contd. a slight alteration to these teeth at the point of entry might cure the trouble entirely. To us it would appear that the increased teazer current to overcome this jam in all… | ||
| Scan059 | The specifications and steering characteristics of an 8-cylinder Panhard car. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY. ORIGINAL Hs/Rm5/LG18. 8.26. 8-CYL. PANHARD CAR. X1052 We understand that this car has a cylinder dimension of 85 X 140 which gives it a… | ||
| Scan060 | Road test report on steering performance under various conditions, including different tyre pressures and shock absorber settings. | ||
| View original record | contd :- -2- 33 X 6.75" and inflated to 38 lbs/sq.in., Michelin tread. ROAD PERFORMANCE OF STEERING. The steering is nice and light. We should say that under similar conditions the steering of 12-EX… | ||
| Scan061 | Technical report on a vehicle's suspension, engine, brakes, and general performance, including comparisons to other models. | ||
| View original record | contd :- -3- SUSPENSION. In spite of the large amount of damping on the front, there was no feeling of exceptional harshness in the driving seat. The rear suspension had not enough damping, having… | ||
| Scan062 | Continued report on vehicle performance, comparing a sleeve valve engine against a Daimler and a poppet valve Hispano engine. | ||
| View original record | contd :- -4- Its acceleration above 30 m.p.h. is very good indeed. The engine is smooth at the higher speeds in contra distinction to the Daimler. Mon. Weymann states that he can drive all day at 3000… | ||
| Scan063 | Comparative tests on three different Goshawk III steering setups. | ||
| View original record | To R. From Hs/AJE. c. to BJ. Wor. c. to RG. E. c. to DA. EY. ORIGINAL Hs/AJE/L619.8.26. GOSHAWK III. STEERING. V5750 X5450 Comparative tests between the following types of steering. (a) The original… | ||
| Scan064 | Steering improvements, comparing different configurations of side steering tubes and buffer springs to reduce low-speed wobble. | ||
| View original record | contd :- -2- especially if it necessitates pulling into the side of a highly cambered road to do so. In order to minimise this effect a side steering tube fitted with stronger and equal buffer… | ||
| Scan065 | Comparison of original and latest type side steering tube buffer springs and their ratings. | ||
| View original record | contd :- -3- (b) Original type side steering tube F.53260. Rear buffer spring F.51864. Rating 376 lbs/ins. Normal load 75.28 lbs. Front buffer spring F.51863. Rating 1153 lbs/ins. Normal load 75 lbs.… | ||
| Scan066 | Investigation into steering complaints and high-speed wobbles on the EAC-Vlll model. | ||
| View original record | To R. from Hs/Rm. c.c. to BJ. Wor. c.c. to RG. E. c.c. to DA. BY. c.c. to OY. ORIGINAL Hs/Rml/LG20.8.26. 12-EX - EAC-Vlll. X7430 X7450 STEERING. Our investigations on EAC-Vlll have shewn us that there… | ||
| Scan067 | High-speed wobble testing with different tyre setups and dampers. | ||
| View original record | contd :- -2- should have expected the period to extend to 50 m.p.h. with the standard axle. It should be clearly understood that the car was not wobbling in the true sense of the word but only trying… | ||
| Scan068 | Steering system tests investigating friction levels and damping to mitigate wobbles and road shocks. | ||
| View original record | Contd :- -3- (b) There is no doubt that small steering shocks on this axle are bad without any frictional resistance in the system. We tried various quantities of friction by loading up the cross… | ||
| Scan069 | Tests conducted to improve vehicle riding qualities, focusing on loading, steering, and tyres. | ||
| View original record | contd :- -4- improve the riding qualities of the car on bad roads. We carried out a number of tests increasing their high pressure loading. While this did somewhat increase their effectiveness in… | ||
| Scan070 | Report page discussing vehicle steering, suspension, and tyre performance, particularly concerning road shocks and wobbles. | ||
| View original record | contd :- -5- say that on very bad roads the 6.75" tyres at 35 lbs/sq.in. are slightly better than the standard tyre for road shocks. Out of centre point steering. We found some old type Dunlop well… | ||
| Scan071 | Improvements made to the 12-EX model and a list of further tests planned for a new axle. | ||
| View original record | contd :- -6- opinion on a single example of any alteration in design. We feel convinced, however, that for bad Continental roads, 6.75" tyres, hydraulic dampers and a spare wheel on the rear, are a… | ||
| Scan072 | Steering tests conducted in France, detailing conditions and arrangements for a new type of front axle. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Nor. c. to RG. E. c. to DA. EY. c. to CY. ORIGINAL. EAC-Vlll - STEERING. During our recent tests in France on the new type front axle, we were able to conduct a series of… | ||
| Scan073 | Steering performance tests using different springs under various road conditions. | ||
| View original record | contd :- -2- is employed. This means that when weak springs are fitted to absorb road shocks the steering becomes spongy as the drivers hand moves through an appreciable distance before any… | ||
| Scan074 | Description and test results for a new arrangement of side steering tube springs. | ||
| View original record | contd :- -3- New arrangement of side steering tube. In the new arrangement of side steering tube springs, the steering wheel is cushioned in both directions from road shocks by one spring at either… | ||
| Scan075 | Summary comparing different side steering tube arrangements and their performance on various road conditions. | ||
| View original record | contd :- -4- If a tyre has a tendency to wobble either due to out of balance or out of truth, these nibbles become rather irritating. Steering selectiveness is rather better than standard with 2500… | ||
| Scan077 | Folder cover sheet for documentation titled 'Packing Front'. | ||
| View original record | PACKING FRONT ( F.753 ) | ||
| Scan078 | Scheme for applying friction to the Phantom steering system to reduce wobbles and irritating movement. | ||
| View original record | To R. from Hs. c. to RJ. Wor. c. to EY. E. c. Da. CY. ORIGINAL HsL/T21.8.26. PHANTOM STEERING. X8430 X8420 We attach herewith a print of a scheme which has been got out by the D.O. for applying… | ||
| Scan079 | Test results for frame deflections on the 40/50 HP New Phantom and 20 HP Car. | ||
| View original record | ORIGINAL To DA. from Hs/Rn. Hs/Aml/LG23.8.26. X8380 X5380 FRAMES. Replying to DA1/M19.7.26. The frame was supported at the centre lines of the axles, and levelled up. A lifting Jack was placed under… | ||
| Scan080 | Compiled notes on the utility of a voltmeter on an electrical system. | ||
| View original record | To R. from EFC. c. BJ. Wor. c. RG. E. c. Da. By. c. PN. CWB. c. EP. ORIGINAL. EFC2/T23.8.26. RE UTILITY OF VOLTMETER ON ELECTRICAL SYSTEM. X8780 Herewith please receive copy of some notes which we… | ||
| Scan081 | The utility and correct installation of a voltmeter on the electrical system. | ||
| View original record | UTILITY OF A VOLTMETER ON THE ELECTRICAL SYSTEM. It has been suggested that we were provided with a fairly accurate voltmeter on the chassis electrical system, trouble due to high voltage and… | ||
| Scan082 | Analysis of using voltmeter readings to determine the state of a battery's charge. | ||
| View original record | Contd. -2- Under steady conditionse of charging the battery, i.e. at constant current at normal rate, its terminal P.D. would gradually rise to an ultimate figure in the neighbourhood of 17.0, and the… | ||
| Scan083 | The use of voltmeters versus ammeters and the cause of poor ignition point performance. | ||
| View original record | Contd. -3- EFC2/T21.8.26. Another point against the use of the voltmeter is that where the driver has sufficient technical knowledge satisfactorily to interpret the indications, with a view to proper… | ||
| Scan084 | Weight of an 8-cylinder Panhard car's body, questioning the owner's provided figure. | ||
| View original record | To DA. from Hs/Rm. ORIGINAL Hs/Rm2/T23.8.26. 8 CYL. PANHARD CAR. X1052 With reference to Del/M21.8.26, whilst we were unable to weigh the actual car, this was the figure given us by the owner. The… | ||
| Scan085 | Tests and proposed improvements to the steering on a 12-EX car to address wobbles. | ||
| View original record | To R. from Hs. c.c. to BJ. Wor. c.c. to DA. BY. c.c. to PN. CWB. c.c. to OY. E Hal/L.G23.8.26. STEERING ON 12-EX CAR - HL/M30.8.26. X7430 X235 We are satisfied that the new front axle and the… | ||
| Scan086 | Statement expressing a preference for 6.75' tyres over the current 5' tyres, despite an increased risk of wobbles. | ||
| View original record | contd :- -2- We are still keen on the use of 6.75" tyres. If we were owners of R-R cars, we would much prefer 6.75" with the slightly increased risk of wobbles, than the present 5" tyres. Hs. | ||
| Scan087 | On high-speed steering wobbles, comparing the effects of different tyre sizes and the wheel's moment of inertia. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to E. Da. c. to By. OY. HIGH SPEED STEERING WOBBLES. X457 With reference to the 6.75" tyres having a greater tendency to promote high speed wobbles than the 6"… | ||
| Scan088 | Experiments into the causes of explosions in the silencer of a Phantom engine. | ||
| View original record | To R. from Hs/AC. c. to BJ. Wor. c. to E. Da. c. to Hy. Cy. ORIGINAL Hs/ACL/T23.8.26. X8230 X93 EXPLOSIONS IN SILENCER OF PHANTOM. We have continued experiments on explosions in the silencer and have… | ||
| Scan089 | Analysis of engine running issues related to air supply, throttle, and fuel mixture. | ||
| View original record | Contd. -2- Its usefulness was extremely limited because if under one particular set of conditions enough air were admitted it would give an inadequate supply for larger throttle openings. Again it was… | ||
| Scan090 | Engine explosions related to throttle position, carburetter mixture, and ignition timing. | ||
| View original record | Contd. -3- Ha/ACLL/T23.8.26. If, however, the throttle is slightly closed the explosions will start again. An explanation of this is that the rich mixture from the carburetter combined with the… | ||
| Scan091 | Tests to reduce exhaust silencer explosions using wire gauze and a sensitive governor. | ||
| View original record | Contd. -4- Ha/ACL1/T23.8.26. Wire gauze over exhaust port:- Copper gauze screens over the exhaust ports, although not entirely preventing the trouble certainly reduce the tendency, but as they very… | ||
| Scan092 | Summary of methods for preventing continuous explosions in the silencer by adjusting the throttle and fuel mixture. | ||
| View original record | Contd. -5- Hs/ACL/T23.8.26. opening up and again perhaps just after shutting the throttle. At present we know no means of preventing this. Our next step in this direction is to see to what extent the… | ||
| Scan093 | Investigation into the cause of explosions in the silencer on the Phantom model, comparing it to the Silver Ghost. | ||
| View original record | To R. from Hs. c.c. to BJ. Nor. c.c. to RG. E. c.c. to DA. EY. c.c. to OY. Hs2/LG23. 8.26. X8230 X8140 EXPLOSIONS IN SILENCER. As this complaint is considered by Sales to be one of the worst features… | ||
| Scan094 | Technical memo discussing throttle bearing friction and comparing engine explosions in Hispano and Lancia cars. | ||
| View original record | contd :- -2- correctly. the chief cause of friction is the bearings for the throttle. We are proposing to try ball bearings in this position to see what improvement can be made. We have tried the… | ||
| Scan096 | The investigation into the failure and burning of battery ignition contact points. | ||
| View original record | To Hm. from Hs. c. to Er. c. to Wor. ORIGINAL Hs3/LG23.8.26. FAILURE OF BATTERY IGNITION POINTS. X4652 It has been agreed to by B.J. that the Experimental Department shall investigate any cases of… | ||
| Scan097 | Distribution tests for the Phantom engine, comparing different manifold and carburetter configurations. | ||
| View original record | To R. from Hs./ACL. c.c. to BJ. Wor.V c.c. to RG.V E. c.c. to DA. BY.V c.c. to OY. ORIGINAL Hs/ACL1/LG26.8.26. DISTRIBUTION TESTS ON PHANTOM ENGINE. Y8080 Y8070 A large number of tests have been made… | ||
| Scan098 | Comparison of fuel flow and distribution using Phantom and Eagle carburettors with different manifold and induction pipe designs. | ||
| View original record | contd :- -2- separated out on the bend after leaving the carburetter, due to the centrifugal action, and continued to flow up the rear of the pipe in quite a thick stream. With the previous manifold… | ||
| Scan099 | Report page detailing experiments comparing Hispano-type manifolds with other designs, including a blueprint of an Eagle carburettor on a modified manifold. | ||
| View original record | contd :- -3- at high speed was given than with the Hispano type manifold. We assume this to be due to the rounded bends leading to the ports giving greater volumetric efficiency than the square bends… | ||
| Scan100 | Report page detailing experiments and potential causes for fuel distribution issues at low speeds, with accompanying blueprint diagrams. | ||
| View original record | contd :- -4- From consideration of the results of these experiments the distribution troubles we experience with the standard augin system at low speeds seems to be due to separating out of fuel at… | ||
| Scan101 | Test report comparing a modified distributing pipe against a standard system, including performance data when cold. | ||
| View original record | contd :- -5- We have tested a pipe in which the entrance into the distributing pipe from the feed pipe consisted of a long narrow slot as shewn in sketch No.5. A standard Phantom carburetter was used.… | ||
| Scan102 | Note on engine system performance, throttle distribution, and the construction of a new distributing pipe. | ||
| View original record | contd :- -6- Note :- With the standard system, readings marked + were the best that could be obtained by adjusting the throttle to correct distribution. The running below 1500 was very erratic with… | ||
| Scan103 | Further experiments with a superheated hot spot throttle heating system on the Phantom model. | ||
| View original record | To R. From Ha/ACL. c.c. to BJ. Mor. c.c. to RG. E. c.c. to DA. EY. c.c. to CY. ORIGINAL Hs/ACL1/LG27.8.26. SUPERHEATED HOT SPOT SYSTEM ON PHANTOM. X8230 X8070 Further experiments have been made with… | ||
| Scan104 | Report page detailing engine warming tests, comparing a superheated system and measuring heat flow to the cooling water using a calorimeter. | ||
| View original record | contd :- -2- compared with that of the exhaust piping and manifold, and again the gas velocity through the pipe is very low when light running which does not tend to promote good heat transference.… | ||
| Scan105 | Test results and conclusions for a super-heated induction pipe system, showing heat added to cooling water at various engine speeds. | ||
| View original record | contd :- -3- | CONDITION. | R.P.M. | B.T.U's/MIN. ADDED TO COOLING WATER. | % OF HEAT ADDED TO THE NORMAL HEAT FLOW TO THE WATER. |… | ||
| Scan107 | The 32-hour test run of the latest pedestal pistons, detailing performance, issues with piston knock, and gudgeon pin fixing. | ||
| View original record | To R. from Hs./ACL. c. to BJ. Wor. c. to RG. H. c. to BY. DA. ORIGINAL Hs/ACL1/LG30. 8. 26. Y8040 X4490 PEDESTAL PISTONS We have completed 32 hrs. running with the latest pedestal pistons - LeC.2237 -… | ||
| Scan108 | Page 2 of a report comparing the weights of standard and pedestal pistons and noting test results for car 7-EX. | ||
| View original record | contd :- -2- should be an advantage. The following is a comparison of the weights of the standard and pedestal pistons :- WEIGHT. | | Complete with Gudgeon pin but no piston rings. | Aluminium piston… | ||
| Scan109 | Progress update on the Phantom engine's new aluminium head and cylinders, and the EAC-Vll chassis. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to BY. ORIGINAL Hs7/LG30.8.26. EAC-Vll. X7770 X.7050 We anticipate it will be 4 or 5 weeks before we have a Phantom engine running with the new aluminium… | ||
| Scan110 | Fitting large section tyres to improve the Phantom's suspension and stay competitive. | ||
| View original record | To R. from Hs.✓ c.c. to EJ. Wor.✓ c.c. to E. DA.✓ c.c. to RQ. EY.✓ c.c. to PN. CWB.✓ Hs3/LG31.8.26. LARGE SECTION TYRES. X4565 The Phantom suspension is No.1 on the list of Sales complaints. By… | ||
| Scan111 | Continued memorandum discussing dampers, low-pressure tyres, steering effort, and tyre compatibility. | ||
| View original record | contd :- -2- The dampers counterbalance the increased tendency for wobbles with the lower pressures, and the improved pivot arrangement on the lightened axle reduces the effort required to steer the… | ||
| Scan112 | Issue where an India cutout return spring was found to be too strong. | ||
| View original record | ORIGINAL To DA. from Hs/AJL. HS/AJL1/LG1.9.26. INDIA CUTOUT SPRING. X54490 Replying to DA3/M29.6.26. The cutout return spring as at present fitted to 9-G-111 at WW. conforms to the conditions called… | ||
| Scan113 | Preliminary steering tests for the 12-EX car, focusing on damper settings. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to E. DA. c. to BY. ORIGINAL Hs/RmL/LGL.9.26. X797D X4565 X7430 X457 12-EX CAR - STEERING TESTS. Below are preliminary tests received from Hs/Rm. in France on the… | ||
| Scan114 | Tyre performance, steering wobble, and suspension settings, including a graph on tyre pressure vs. selectiveness. | ||
| View original record | contd :- -2- noted that though we have some 6.75" tyres worn to the canvas and very uneven, they will not wobble even with no dampers. Another point of interest is that unless we add a lot of friction… | ||
| Scan115 | Vehicle suspension issues, including wandering, damping, pivot lean, and damper oil viscosity. | ||
| View original record | contd :- -3- wheel increase. Possibly it is the effect they have on the pivot lean as 1" on the rear = 1/2º pivot lean approximately. We are more or less convinced that a large proportion of the… | ||
| Scan116 | Laboratory report on the chemical analysis and heat treatment of a valve rocker. | ||
| View original record | Hs. C O P Y. Laboratory. H12/EA30.8.26. Report No. L524 Re: Valve Rocker sent in for examination 28.8.26. Analysis. Carbon ---------- 0.36% Manganese -------- 0.72% Nickel ----------- 3.60% The… | ||
| Scan118 | Proposing a visit to discuss tests investigating high-speed vibration on a 20 HP engine. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to RG. E. c. to DA. EY. ORIGINAL X1698 X6324 VISIT TO WW. Hs1/LG2.9.26. We propose visiting WW. on Tuesday next the 7th. unless we hear from you that it is not… | ||
| Scan119 | Results of steering tests in France and the decision to revert to a standard steering tube. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to E. DA. c. to EY. ORIGINAL Hs/Rm1/LG2. 9.26. [Handwritten]: X7430 [crossed out] X7450 X78820 12-EX - STEERING TESTS IN FRANCE. We have abandoned the idea of… | ||
| Scan120 | The testing of Dunlop and Michelin tyres, and shock damper settings on covered cars. | ||
| View original record | contd :- -2- with advantage to give greater control on covered cars. We have tried out the new 6" traction tread Dunlop tyres just received. While not quite as bad as the triple stud type, they are… | ||
| Scan121 | Report on comparative tests of Maconite H.T. ignition cable after weather exposure. | ||
| View original record | To R. from EFC. c. BJ. PN. c. E. By. c. Wor. Rg. ORIGINAL EFC1/T2.9.26. MACONITE INSULATING H.T. CABLE FOR CHASSIS. X3860 Attached please receive a copy of my assistant's report WB.99, referring more… | ||
| Scan122 | Report comparing the insulation properties of 'Maconite' and 'Glover' H.T. ignition cables after environmental exposure and voltage testing. | ||
| View original record | WB.99. 31.8.26. "MACONITE" H.T. IGNITION CABLE. In a previous report on this cable (see WB.84) it was mentioned that a sample of Maconite and Glover cable had been exposed to the light and atmosphere.… | ||
| Scan123 | The development and performance of a double ballast resistance using various gauges of nickel wire. | ||
| View original record | To R. from EFC. c. BJ. PN. c. RV. Wor. c. EP. E. X.8720. DOUBLE BALLAST RESISTANCE. Further to our EFC1/T24.6.26, we have now several ballast resistances of cold value double the standard. These are… | ||
| Scan124 | Testing double ballast resistances made from a nickel-manganese alloy called 'Mangonic'. | ||
| View original record | Contd. -2- EFC3/T2.9.26. In addition to the above double ballast resistances of wire of standard composition, we are also trying out double ballast resistances of wire of so-called "Mangonic"… | ||
| Scan125 | Graph of the volt-ampere characteristic for a standard ballast resistance made of nickel wire. | ||
| View original record | AMPERES. VOLTS. VOLT-AMPERE CHARACTERISTIC OF R STANDARD BALLAST RESISTANCE. (25" OF 31 S.W.G. NICKEL WIRE) H.E.W. 13-5-26 | ||
| Scan126 | Graph showing the volt-ampere characteristics of double ballast resistances. | ||
| View original record | VOLT-AMPERE CHARACTERISTICS OF DOUBLE BALLAST RESISTANCES. AMPERES VOLTS. .5, 1.0, 1.5, 2.0, 2.5 2, 4, 6, 8, 10, 12, 14, 16 O A □ B Δ C X D. A - 34" OF 34 SWG WIRE B - 39" " 33 " " C - 44" " 32 " " D… | ||
| Scan127 | Graph showing the volt-ampere characteristics of a Delco-Remy ballast resistance. | ||
| View original record | VOLT-AMPERE CHARACTERISTICS OF DELCO-REMY BALLAST RESISTANCE. AMPERES 2.0 1.5 1.0 .5 0 VOLTS 0 2 4 6 8 10 12 14 Y4784 H.E.W 4-11-25 | ||
| Scan128 | Investigation into crankshaft vibrations on the 20 HP engine. | ||
| View original record | To R. from HS/ACL. c.c. to BJ. Wor. ✓ c.c. to RG. E. ✓ c.c. to DA. EY. ✓ c.c. to Oy ✓ ORIGINAL Hs/ACL1/LG4.9.26. X634 X4221 X5010 20 HP. CRANKSHAFT VIBRATIONS. Crankshaft vibrations at high speeds… | ||
| Scan129 | Preliminary experiments investigating engine vibration at various speeds. | ||
| View original record | contd :- -2- PRELIMINARY EXPERIMENTS. A standard engine was used and it was found that the most intense vibration was encountered at a speed of 3350 r.p.m., in fact so severe that fracture would… | ||
| Scan130 | Engine vibration tests, investigating torsional oscillations and the effect of slipper flywheels. | ||
| View original record | contd :- -3- normal amount of friction reduced the intensity of the vibrations and the previous 1600 r.p.m. vibration was hardly evident and could only be detected at full load. We were unable to… | ||
| Scan131 | Results of belt drive experiments focusing on engine vibrations at various speeds. | ||
| View original record | contd :- -4- BELT DRIVE EXPERIMENTS. The results shewed that the vibrations occurred at the same speeds and the one at 3350 r.p.m. was just as severe as when running under power. The vibration at 1600… | ||
| Scan132 | Analysis of torsional vibration of a crankshaft, considering disturbing forces from piston inertia and resultant torque. | ||
| View original record | contd :- -5- Consideration of these results indicates that the phenomenon is a pure torsional vibration of the crankshaft and the disturbing force is mainly dependent upon the piston inertia. We have… | ||
| Scan133 | Report page detailing experiments with an indicator to graphically show torsional oscillations in a crankshaft. | ||
| View original record | contd :- -6- large amplitude until ultimately fracture would occur. Speeds of 1/2, 1/3, 1/4, etc. of the critical speed would also be expected to produce vibrations of larger amplitude than mere… | ||
| Scan134 | Report page detailing an apparatus for observing torsional oscillations and crankshaft vibrations, with analysis of results at various speeds. | ||
| View original record | contd :- -7- Actually this apparatus was constructed from the existing slipper drive, the flywheels being bolted together so that they could rotate freely without friction on the spring drive hub and… | ||
| Scan135 | Analysis of torsional vibrations and critical speed based on diagrams at various engine speeds. | ||
| View original record | contd :- -8- and the amplitude is greater. The amplitude on these diagrams being represented by the height from the 'crest' of the wave to the 'trough'. The diagram at 3350 r.p.m. we designate the… | ||
| Scan136 | Analysis of crankshaft vibrations, focusing on frequency, amplitude, and stress under various conditions. | ||
| View original record | contd :- -9- the maximum amplitude and should be within about approx 50 r.p.m. If we multiply together the r.p.m. and the number of oscillations on these diagrams, we get the frequency or oscillations… | ||
| Scan137 | Summary of test results on torsional oscillations and vibrations at various engine speeds. | ||
| View original record | contd :- -10- its alternating nature. At 1600 r.p.m. - and being a better diagram we are able to estimate this a little more accurately - the resulting deflection is approximately 1° 6' (0.33' each… | ||
| Scan138 | Torsional deflection and inertia experiments to determine the natural frequency of a crankshaft. | ||
| View original record | contd :- -11- effectively damp out the 800, 1100 and most of the 1600 r.p.m. oscillations. TORSIONAL DEFLECTION, INERTIA EXPERIMENTS AND DETERMINATION OF NATURAL FREQUENCY. We took torsional… | ||
| Scan139 | Calculations for inertia and natural frequency of vibration for engine components using the Bifilar suspension method. | ||
| View original record | contd :- -12- The Bifilar suspension method was employed. The following are the results :- [Image of a Bifilar Suspension blueprint with labels d, l, and W] BIFILAR SUSPENSION SPRING DRIVE PARTS :- l… | ||
| Scan140 | Report page detailing calculations for torsional oscillations and the nodal point in a crankshaft system. | ||
| View original record | contd :- -13- For the case under consideration the node would be close to the flywheel due to its large moment of inertia. Let ( n₁ = oscns/sec. with one end fixed. ( n₂ = " " " other " " ( n =… | ||
| Scan141 | The influence of a stiffer crankshaft on engine vibration and critical speed. | ||
| View original record | contd :- -14- INFLUENCE OF STIFFER CRANKSHAFT. We found that the stiffer crankshaft raised the critical speed from 3350 r.p.m. to 3500 - 3600 r.p.m. The vibration at this speed was probably not quite… | ||
| Scan142 | Inertia torque, crankshaft taper erosion, and torsional vibrations, identifying a critical speed of 3350 r.p.m. | ||
| View original record | contd :- -15- At the lower speeds the inertia torque decreases considerably and its lower harmonics do not seem to be of sufficient amplitude to cause trouble. The explosion pressures however possess… | ||
| Scan143 | Summary of test findings on crankshaft oscillation and vibration, including the effectiveness of slipper dampers and plans for future experiments. | ||
| View original record | contd :- -16- (3) One free period of oscillation of the standard crankshaft assembly is between 167.5 and 172.5 oscillations per second. (4) Belt drive tests - without cylinder head - indicate the… | ||
| Scan146 | Diagram of a Torsional Vibration Indicator. | ||
| View original record | RECORDING PLATE WHICH SLIDES ON EXTENSION OF CRANK NUT. EXTN OF CRANK NUT WASHER SEPARATING FLYWHEELS WHITE METAL LINED PLATE ATTACHED RIGIDLY TO HUB SPG. CARRIER ATTACHED TO FLYWHEELS SHEWN IN THIS… | ||
| Scan147 | Graph comparing the torsional deflection curves of standard and stiffer 20 HP crankshafts under torque. | ||
| View original record | 20. H.P. R.R. CRANKSHAFTS TORSIONAL DEFLECTION CURVES. MEASURED IN POSITION IN CRANKCASE WITH F.W. LOCKED AND TORQUE APPLIED AT FRONT END. REFLECTING BEAM OF LIGHT METHOD. ANGULAR DEFLECTION. MINS.… | ||
| Scan149 | Outlining a scheme to observe the life of ignition contact points and requesting related data. | ||
| View original record | To E. from EFC. NC/18.9.26. V2894 x4652 LIFE OF IGNITION CONTACT POINTS. In accordance with a scheme which we have arranged of systematically observing the results on contact point life utilising the… | ||
| Scan150 | Torque reaction vibrations caused by chassis modifications and a proposal to fix the issue by refitting the original cross member. | ||
| View original record | To: [REDACTED] From: Hs. C. to: [REDACTED] C. to: [REDACTED] ORIGINAL. Hs3/LG9.9.26. EAC.1. X9950 X9380 In its original form this chassis was remarkably free from torque reaction vibrations, it was… | ||
| Scan151 | Test results on different tyre sizes regarding high speed wobble. | ||
| View original record | To R. from Hs/Rn. c. to BJ. Wor. c. to RG. E. c. to DA. EY. ORIGINAL Hs/Rml/LG10.9.26. HIGH SPEED WOBBLES. y457 X4565 X4050 With reference to our Hs/Rm5/T23.8.26. in connection with peripheral weight… | ||
| Scan152 | Test report on a 6 cylinder 24 Hours Le Mans Lorraine car. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to E. DA. c. to By. Hs/Rm2/L.10.9.26. X3588. 24 HRS. LE MANS - LORRAINE CAR. 6 cyl. Dual battery ignition. 75 X 130 (3447 c.c.) Canti-lever rear springs. The test… | ||
| Scan153 | Vehicle performance report detailing issues with the engine, brakes, steering, and suspension. | ||
| View original record | contd :- -2- There was no definite period up to 80 m.p.h., although as one would expect the engine was somewhat rough throughout the whole range. The main feature of the engine was its extraordinary… | ||
| Scan154 | Summary report on a car's performance, focusing on its engine and handling characteristics. | ||
| View original record | contd :- -3- when the brakes were applied. The whole suspension gave one the impression that it contributed to the poor steering of the car at high speeds. SUMMARY. This is more or less what one would… | ||
| Scan155 | Test report on an 'IMCO' Autopulse Fuel Pump fitted to chassis 9.EX, comparing its performance to the Autovac system. | ||
| View original record | To R. from Hs/AJL. c.c. to EJ. Wor. c.c. to RG. R. c.c. to DA. EY. c.c. to OY. ORIGINAL Hs/AJL1/LG13.9.26. 'IMCO' AUTOPULSE FUEL PUMP. X3800 X3579 This pump has been fitted to chassis 9.EX and has run… | ||
| Scan156 | The performance failings and noise issues of an Autopulse fuel pump unit. | ||
| View original record | contd :- -2- Autopulse unit is expected to control the amount of petrol delivered to the float chamber, this is not sufficiently sensitive to ensure a constant spped. Under these conditions its… | ||
| Scan157 | Tests conducted on 2.6' diameter white metal bearings to determine creep under alternating loads. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor.✔ c. to RG. E.✔ c. to BY. AJS.✔ ORIGINAL Hs/RmS/LG15.9.26. XL4633 WHITE METAL BEARING TESTS. 2.6" DIA. BEARINGS. We have conducted a test to determine the unit pressure… | ||
| Scan158 | Continuation page of a report on bearing tests under varying pressure and load frequency. | ||
| View original record | contd :- -2- exact frequency. This was approximately twice/sec. throughout the test, or about 1/4 the rate of shaft revolution. It will be observed that at the maximum load, the bearings were… | ||
| Scan160 | Clarifying the definitions and testing of 'helix angle' and 'spiral angle' for a sequence starter. | ||
| View original record | To R. from EFC. c. BJ. E. c. By. By/RD. c. AJS. ORIGINAL EFC3/T14.9.26. v7650 RE SEQUENCE STARTER. There has been a little mutual confusion in the use and interpretation of the terms 'helix angle' and… | ||
| Scan161 | High tension D.C. tests of insulating materials such as bakelite, bakelised linen, canvas plates, and redmanol coil cases. | ||
| View original record | To R. from EFC. c. BJ. PN. c. Da. E. c. EP. Rg. c. Wor. By. ORIGINAL HIGH TENSION D.C. TESTS OF INSULATING MATERIALS. We have made a number of high voltage D.C. tests of bakelite insulating materials,… | ||
| Scan162 | Circuit diagram for a high-voltage test apparatus using a valve rectifier. | ||
| View original record | ~ SUPPLY 200 VOLTS or 100 VOLTS Primary H.T. Secondary ± 10000 ± 5000 ± 2500 0 ± 2500 ± 5000 ± 10000 ±2400 alt.volts max. 3400. Valve rectifier. Milliammeter. Plate under test. | ||
| Scan163 | Characteristics and results of an electrical insulation test system. | ||
| View original record | EFCL/T16.9.26. -2- Contd. The characteristics of the test system would be such that if the insulation stood up perfectly, i.e. no leakage current, the applied test D.C. voltage would reach this… | ||
| Scan164 | Tests of bakelised plates and coil cases, investigating insulation resistance and leakage currents. | ||
| View original record | Contd. -3- EFCL/T16.9.26. The reason why the tests on the bakelised plates were undertaken in the first instance was that it was found that the insulation resistance of dynamos did not satisfy the… | ||
| Scan165 | Test results for leakage in micro-amperes of Redmanol and Stabalite coil cases at increasing temperatures. | ||
| View original record | Contd. -4- EFC1/T16.9.26. cases, because it is quite clear from comparative results even now that there are variations from coil case to coil case, and variations according to the subsequent heat… | ||
| Scan166 | Repeated tests on various coil cases at 100°C, with tabulated results. | ||
| View original record | Contd. -5- EFC1/T16.9.26. Afterwards, the tests at 100°C were repeated several times in each case (except that of the stabalite) and a redmanol coil case which had run 10,000 miles on a car and had… | ||
| Scan167 | Test results for the electrical leakage of various linen and canvas based sheet materials. | ||
| View original record | Contd. -6- EFCL/T16.9.26. Results for sheet materials:- The sheet materials were placed on a metal plate covered with tin-foil to ensure good contact, which foil formed one electrode. The other… | ||
| Scan169 | The results of temperature tests on redmanol and stabalite coil cases and various sheet materials. | ||
| View original record | Contd. -7- EFC1/T16.9.26. The samples L and O were tested at 100°C, the other two were merely heated by the electrodes from a previous test, when a preliminary reading shewed them to be too bad for… | ||
| Scan170 | Battery ignition contact breaker unit for 20 HP and 40/50 HP models, focusing on modifications and the position of contact points. | ||
| View original record | To R. from EEC. c. E. BJ. c. By. ORIGINAL EEC3/T18.9.26. RR.BATTERY IGNITION CONTACT BREAKER UNIT 20 HP. and 40/50 HP. X2894 x5690 X8190 x428 It has been suggested that we might have a felt packing… | ||
| Scan171 | On steering friction in pivots, comparing issues between the 20 HP and the New Phantom models following tests in France. | ||
| View original record | To R. from Hs/Rm. c. to B.J. Wor. c. to R.G. E. c. to D.A. BY. XXXXXXXXXXXXXXXX ORIGINAL Hs/Rm2/LG20.9.26. EAC. STEERING. X7450 FRICTION IN PIVOTS. In our recent tests in France we have observed that… | ||
| Scan172 | Steering tests, friction measurements, and performance at high and low speeds. | ||
| View original record | contd :- -2- strengths and set up in the cross steering tube. We have carried out a number of tests varying the ball end load and find that with the new axle pivot arrangement a range of from 5 to 9… | ||
| Scan173 | Arrangement of a light type axle pivot for the C2 Series with additional friction. | ||
| View original record | C75041 FOR INFORMATION NOT SHOWN HERE SEE ARRT G74294 (SHT. 1&2) G75010 G75011 G75012 G75008 G75007 G75009 N.S.2094 CLEARANCE HERE TO BE FROM .003 TO .016. 19-8-26 40/50 H.P. 7040. ARRANGEMENT OF… | ||
| Scan174 | Suspension comparison test between a Lancia and a 40/50 HP model, focusing on the effect of rear-mounted spare wheels. | ||
| View original record | To R. from Hs/Rn. c.c. to EJ. Hor. ✓ c.c. to RG. E. ✓ c.c. to DA. EY. ✓ c.c. to OY. ORIGINAL Hs/Rhd/LG20.9.26. SUSPENSION. X8410 X4048 We have always been under the impression that the Lancia owed a… | ||
| Scan176 | Comparing crankshaft vibration experiments between the Phantom and 20 HP engines. | ||
| View original record | To R. from Hs/ACL c.c. to E.J. Wor. c.c. to RO. E. c.c. to DA. EY. c.c. to CY. Hs/ACL1/LG20.9.26. PHANTOM AND 20 HP. CRANKSHAFT VIBRATIONS. X8010 X5010(crossed out) X654. We have carried out further… | ||
| Scan177 | Testing slipper wheels and the effects of varying damping torque on crankshaft vibration. | ||
| View original record | contd :- -2- The slipper wheels were replaced with a normal damping torque of 315 lbs.ins. which, although smoothing out the lower speed vibrations, seemed to have little or no effect on the one at… | ||
| Scan178 | Report summarizing preliminary tests on Phantom engine vibrations and friction torque. | ||
| View original record | contd :- -3- 5000 lbs.ins. had to be used before the wheels became effectively solid. We can only give approximate figures because with the high unit pressures necessary on the slipping surfaces, the… | ||
| Scan179 | Vibration experiments and damping friction tests on the '20 HP' and 'Phantom' models. | ||
| View original record | contd :- -4- (3) A friction torque of approx. 5000 lbs.ins. transfers the vibration entirely to 2000 r.p.m. which is slightly less severe than when at 3150 r.p.m. (4) Vibrations due to the lower… | ||
| Scan180 | Engine vibration tests concerning friction torque, damping, and the effect of piston weight and position. | ||
| View original record | contd :- -5- resulted in the vibrations being evident at both the higher and lower speed, but the higher one was not so violent as with the standard amount of friction. (4) Friction torque of… | ||
| Scan181 | The investigation of torsional oscillations, piston weights, and the effects of a stiffer crankshaft. | ||
| View original record | contd :- -6- 8 3/4° while the three rear pistons gave 2 3/4°. This is proof that the pistons farthest from the flywheel are the most effective in the promotion of torsional oscillations. The effect of… | ||
| Scan182 | Crankshaft vibration testing and measuring the torsional rigidity of the Phantom and Silver Ghost models. | ||
| View original record | contd :- -7- greatest amplitude to the vibration and are slightly lower than we found before using the recording apparatus because of the inertia of the plate carrying this apparatus which we bolt to… | ||
| Scan184 | Tests conducted in France for the Phantom's lightened type front axle. | ||
| View original record | To R. From Hs/Rn. c. to BJ. Wox. ✓ c. to RG. R. ✓ c. to DA. BY. ✓ c. to CY. ORIGINAL Hs/Ref/LCSD.9.26. PHANTOM - LIGHTENED TYPE FRONT AXLE. X7420 X7430 Attached herewith is a report of tests made in… | ||
| Scan185 | Summary of tests on a lightened front axle including comparisons, steering friction, tyres, and suspension settings. | ||
| View original record | Hs/Rm4/LG30. 9.26. TESTS ON LIGHTENED FRONT AXLE (G. 74294). SUMMARY. I. COMPARISON - STANDARD V. LIGHTENED AXLE a. Lightness. b. Selectiveness. c. Road shocks. d. High speed wobbles. e.… | ||
| Scan186 | Report comparing a new lightened front axle with a standard axle on various performance characteristics. | ||
| View original record | -1- 1. STANDARD V. LIGHTENED AXLE. (a) Lightness. The new front axle when compared with a standard front axle on 12-EX, even when the necessary friction had been added to give good high speed control,… | ||
| Scan187 | Testing steering friction and axle arrangements to address low-speed wobbles. | ||
| View original record | contd :- -2- of giving lighter steering than with the standard axle. We believe that we can see the reason for this as explained elsewhere. (f) Low speed wobbles. As finally arranged for test by… | ||
| Scan188 | Comparison of steering and ride characteristics using Dunlop 6.75' and Michelin 6.2' tyres at various pressures. | ||
| View original record | contd :- -3- (a) 6.75" traction tread 'Dunlop'. These tyres at 35 lbs/sq.in. with 5 - 6 lbs. friction in the ball ends, and 1500 lbs. springs in standard side steering tube, give quite satisfactory… | ||
| Scan189 | The performance of different tyre models and the effect of tyre pressure on car control. | ||
| View original record | contd :- -4- (c) 6" Dunlop traction and triple stud. These tyres seem to have no advantage over the 6.2" Michelin and 6.75" Dunlop, and a number of very definite disadvantages. We cannot therefore see… | ||
| Scan190 | Shock damper settings and their effects on vehicle handling with Michelin 6.2' tyres. | ||
| View original record | contd :- -5- V. SHOCK DAMPER SETTING. Condition of car. Michelin 6.2" tyres. (a) Front. 35 lbs. up - 100 down. Prevents any wobble building up but shocks transmitted to the wheel at critical speed… | ||
| Scan191 | Test report on steering tube arrangements with various spring ratings and tyres. | ||
| View original record | contd :- -6- VI. S.S. TUBE ARRANGEMENT WITH MICHELIN 6.2" OR DUNLOP 5.75" TYRES. (a) Std. arrangement with various spring ratings. 3000 lbs. There is no doubt that without an unpleasant amount of… | ||
| Scan192 | Analysis of front road springs and their effect on wobble and ride characteristics. | ||
| View original record | contd :- -7- checking the initial tendency to dive. Vll. FRONT ROAD SPRINGS. (a) Woodhead reversed leaf. These do not seem to have a material influence on the type of wobble with which we are dealing,… | ||
| Scan194 | The discontinuation of 6.75' Traction Tread tyres by Dunlop and issues with the new replacement triple stud pattern. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to E. Da. c. to Ev. ORIGINAL Hs/Rnl/T21.9.26. 40/50. 6.75" TYRES. X4565 X46050 In spite of the fact that the 6.75" Traction Tread Tyres which we have been running… | ||
| Scan195 | Tyre supply issues with Dunlop, high-speed wobbles, and plans for improved triple stud tyres. | ||
| View original record | Contd. -2- Hs/Rml/T21.9.26. it is already obsolete. We therefore have no tyre we can fit on the well-based wheels at the moment. As a result of our somewhat unfortunate position, we have endeavoured… | ||
| Scan196 | Proposed visit to test the 12-EX car and the aluminium Phantom engine. | ||
| View original record | To R. from Hs. c. to BJ. Wor.✓ c. to RG. E.✓ c. to BA. Byd.✓ ORIGINAL Hs2/LG21.9.26. VISIT TO WW. [Handwritten] X1698 X7940 We propose coming to WW. on Wednesday next, unless we hear it is… | ||
| Scan197 | Problem of squeaking brakes on cars fitted with a new lightened axle, suggesting dampers as a solution. | ||
| View original record | To R. from Hs. c. to BJ. Wor.✔ c. to E. RG.✔ c. to DA. EY.✔ Hs3/LGM.9.26. SQUEAKING BRAKES. X7420 X9420 We are rather concerned with the fact that we have had more front brake squeaks on cars fitted… | ||
| Scan198 | Confirming the despatch of a subframe to Messrs. Hoopers coachbuilders. | ||
| View original record | ORIGINAL To DA/EV. from Hs. Hs1/LG22.9.26. EAC-7 - SUBFRAME. x7380 We have despatched the subframe suitable for EAC.7. to Messrs. Hoopers, Coachbuilders, Chelsea. Hs. | ||
| Scan199 | Steering tests and pivot inclination, comparing a new axle with an old axle. | ||
| View original record | To R. from He/Rm c.c. HJ. Wor. c.c. Ev. Rg. c.c. E. Da. c.c. DY. ORIGINAL Hs/RmL/T22.9.26. R. Da. Sg. E TAC. VIII. STEERING. X7430 PIVOT INCLINATION. N7420 The new axle gives remarkably light… | ||
| Scan200 | Tests conducted on a standard axle with vertical king pins and the resulting effects on steering. | ||
| View original record | Contd. -2- The most interesting test was that carried out with a standard axle altered to give vertical king pins (5). In this case with a disc wheel giving centre point steering, the steering was as… | ||
| Scan201 | Page from a report discussing steering effort in relation to wheel center and king pin geometry. | ||
| View original record | Contd. -3- Hs/Rml/T22.9.26. shocks, and yet not make the steering appreciably heavier. Normally, if we move the wheel centre 3/4" from the king pin the effort required to shunt the car becomes… | ||
| Scan202 | Comparison of steering effort based on transverse pivot inclination for different car series and axle types. | ||
| View original record | Attached to:- TRANSVERSE PIVOT INCLINATION OVERALL STEERING EFFICIENCY ASSUMED AS 60% WHEN CALCULATING LOADS ON THE STEERING WHEEL RIM PIVOT ASSUMED VERTICAL IN LONGITUDINAL ELEVATION TO SIMPLIFY… | ||
| Scan203 | Comparison of five different axle and pivot arrangements and their effect on steering heaviness. | ||
| View original record | E.A.C. V SERIES. SILVER GHOST T SERIES EXPT AXLE WITH WIRE WHEELS V SERIES PIVOTS NEW AXLE WITH NEW PIVOTS C2 SERIES EXPT AXLE WITH DISC WHEELS V SERIES PIVOTS Diagram 1: 6°, .616 Diagram 2: 5°, .554… | ||
| Scan204 | The continued use and testing of Dunlop 6.75' traction tread tyres. | ||
| View original record | To R. from Hs. c.c. to E.J. Mor. ✓ c.c. to RG. E. ✓ c.c. to DA. Ey.✓ c.c. to CY. ORIGINAL HsS/LG22.9.26. DUNLOP TYRES. X4050 X4565 We have received a message from the Dunlop Rubber Co. today saying… | ||
| Scan205 | Test report comparing a vertical pivot front axle with a standard axle, focusing on handling characteristics with balloon tyres. | ||
| View original record | To R. from Hs/Rm. c.c. to EJ. Wor. c.c. to RG. c.c. to DA. BY. c.c. to CY. Hs/RMd/LG22.9.26. VERTICAL PIVOT 3.5" OUT OF CENTRE POINT. X7420 STANDARD PIVOT BEARING FRONT AXLE, 6.2" X7430 BALLOON TYRES!… | ||
| Scan206 | Analysis of steering geometry, pivot types, and their effects on vehicle handling and stability. | ||
| View original record | contd :- -2- When negotiating very sharp bends at any speed, the steering becomes heavy owing apparently to the fact that the geometry of the steering is incorrect on a lock i.e., the Ackermann affect… | ||
| Scan207 | Steering performance issues, specifically road shocks and wobbles. | ||
| View original record | contd :- -3- The steering is bad for road shocks at all speeds. It is not very definite at high speeds, but cannot really be said to wander. It is bad for wobbles, being definitely worse than either… | ||
| Scan208 | Experiments to determine the torsional deflection curve and rigidity of a Phantom crankshaft. | ||
| View original record | ORIGINAL To R. From Hs/ACL. c.c. to EJ. Wor.✓ c.c. to RG. K.✓ c. to DA. EY. c. to OY✓ Hs/ACL1/LG23.9.26. [Handwritten, crossed out: X634 X8840] [Handwritten, underlined: X8010] PHANTOM - CRANKSHAFT… | ||
| Scan209 | Calculation of weight and polar moment of inertia for various engine components. | ||
| View original record | contd :- -2- PART. WEIGHT. LBS. POLAR MOM: OF INERTIA (W/g K^2) Crankshaft complete - 75.875 .06738 units. Big end of conn. rod - 15.84 .02579 * (2.64 lbs. each. Total for six) Spring drive parts -… | ||
| Scan210 | Report analyzing engine oscillations and critical crankshaft speed, comparing the Phantom and 20 HP models. | ||
| View original record | contd :- -3- Working this out on the lines given in our first report we find that the free period would be 158 oscillations per second or 9480 oscillations per minute. We know from the 20 HP. results… | ||
| Scan212 | Road test results of a finer primary coil on a 20 HP chassis. | ||
| View original record | To R. from EFC. c. EJ. RE FINER PRIMARY COIL. X4653 Reference your R4/M18.9.26, road tests were made on the 20 HP. chassis with finer primary coil and double ballast resistance (two standards in… | ||
| Scan213 | Recurring crack in a Phantom engine crankcase during test bench runs. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor.✓ c. to RG. E.✓ c. to DA. BY.✓ ORIGINAL HS/ACLL/LG24.9.26. RE. CRACK IN PHANTOM CRANKCASE. X8000 A crack has developed in the upper half of the crankcase of a Phantom… | ||
| Scan214 | Considering a single-block cylinder design to prevent a potential future issue. | ||
| View original record | contd :- --2-- seldom need to remove. While we do not think there is any immediate cause for alarm, because this trouble has not been evident on any of the cars tested here or in France, it would be… | ||
| Scan215 | Blueprint diagram illustrating the position of cracks in a Phantom crankcase. | ||
| View original record | OIL PUMP DRIVE. CRACK. CRACK IN WALL OF CRANKCASE OIL PUMP DRIVE COVER CRACKS. TAPPET SIDE OF CRANKCASE SHEWING POSN OF CRACKS. POSITION OF CRACK IN PHANTOM CRANKCASE. ROLLS-ROYCE LTD PRINT R.O. 24… | ||
| Scan217 | Mileage test results for Redmanol encased ignition coils. | ||
| View original record | To R. from EFC. c. BJ. E. c. Da. By. c. Wor. X.4079c - REDMANOL ENCASED IGNITION COILS. X8711 Redmanol encased coils have now completed the following mileages without failure. Date started. Standard… | ||
| Scan218 | Comparative weight analysis of lightened Phantom engine components. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to RG. E. c. to DA. EY. ORIGINAL Hs3/LO27.9.26. LIGHTENED PHANTOM ENGINE. X8840 X8770 We give below comparative weights of the lightened pieces in connection with the… | ||
| Scan219 | From EFC to AJS regarding a delay in test results for the X.7650 Sequence Starter. | ||
| View original record | To AJS. from EFC. ORIGINAL EFC 4/T29.9.26. X.7650. SEQUENCE STARTER. Answering your note AJS2/M21.9.26, we regret that so far we have no results to send you. However, the instructions on the job to… | ||