Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Test results for a sequence starter, focusing on armature pull and current characteristics of different windings. | ||
| View original record | To R. from EFC. c.c. RJ. AJS. EFC2/T1.10.26 ORIGINAL SEQUENCE STARTER. x7650 We have now completed the tests asked for in your RL/M22.9.26. and attached please find a photostat copy of curves giving… | ||
| Scan002 | Amperage, turns, and frictional effects in a motor winding. | ||
| View original record | Contd. -2- EFC2/T1.10.25. and the turns 36. This would be the equivalent of 17 amperes in the present case, using the actuator box and 25 amperes; not using it, i.e. to 510 and 750 ampere turns… | ||
| Scan004 | Electrical functionality and modifications to the Phantom Sequence Starter No.2 scheme. | ||
| View original record | ORIGINAL To AJS. from EFC. EFC1/T1.10.26. c. BJ. BY. BY/D. PHANTOM SEQUENCE STARTER No.2 SCHEME. We have, as requested in your AJS1/M24.9.26 carefully examined LeC.2298 from an electrical point of… | ||
| Scan005 | Toggle principle and pinion operated switch to prevent engine hunting effects. | ||
| View original record | Contd. -2- EFC1/T1.10.26. on the toggle principle, or with a certain amount of backlash as at present provided by the pinion operated switch ? Would not this be a means of positively preventing the… | ||
| Scan006 | Front axle tests concerning the effect of tyre contact offset on steering when braking on four-wheel brake cars. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to Rg. E. c. to Da. By. ORIGINAL Hs/Rm3./T1.10.26. FRONT AXLES. X7420 X8430 With reference to Da3/M24.9.26. We have carried out tests on two front axles having the… | ||
| Scan007 | Steering and braking dynamics, referencing issues with pivots leaning forward and the effects of spring strength. | ||
| View original record | Contd. -2- Hs/Rm3/T1.10.26. It appears to us that the most dangerous feature of the pivots leaning forward, is that the driver very probably gets no indication whatever of danger until he is in a… | ||
| Scan008 | Brake tests and their effect on steering and axle control under various conditions. | ||
| View original record | Contd. -3- Hs/Rm3/T1.10.26. the case when the axle pivots are twisted forward. The drag produced by 2.6" out of centrepoint can easily be counteracted by the driver without any severe physical effort… | ||
| Scan009 | Continued discussion on steering lock, front axle design, and the advantages of helical springs. | ||
| View original record | Hs/Rm3/T1.10.26. -4- Contd. wheel. In no case do we consider that it would be as dangerous as the condition where the man applies his brake violently in a crisis, and finds without any previous… | ||
| Scan010 | Rigging a hydraulic steering damper, including a sketch and initial load findings. | ||
| View original record | ORIGINAL To R. from Hs/Rm. c. to BJ. Wor. c. to E. Da. c. to Ev. Rg. Hs/Rm1/T2.10.26. X235 HYDRAULIC STEERING DAMPER. We have rigged up a front hydraulic shock damper on the steering, as indicated in… | ||
| Scan011 | Preliminary test results comparing the lighter Phantom engine to the standard model, focusing on weight, compression, power, and detonation. | ||
| View original record | To R. from Hs/ACL. c.c. to BJ. Mor. c.c. to R. RG. c.c. to DA. EY. c.c. to CY. ORIGINAL Hs/ACL2/LGS.10.26. LIGHTER PHANTOM ENGINE. We have had the lighter Phantom engine running and made some… | ||
| Scan012 | Analysis of engine performance concerning ignition timing, detonation, turbulence, and modifications to pistons and cylinder heads. | ||
| View original record | contd :- -2- ratio but considerably less intense than the 5.2 to 1 ratio used on car 10-EX. It was found that less ignition advance was required when the two ignitions were synchronised than when used… | ||
| Scan013 | Engine performance comparing increased compression ratios, detonation, and various ignition configurations including single, dual, and synchronised. | ||
| View original record | Contd :- -3- head, whereas previously this clearance was .128. This resulted in raising the compression ratio from 4.45 to 1 to 4.69 to 1. In addition the piston was slightly flattened so as to remove… | ||
| Scan014 | The effects of synchronized ignition on engine efficiency and power under various loads. | ||
| View original record | contd :- -4- in the standard position and synchronised ignitions gave no different results to single - see report Hs4/ACL/LG18.9.25 attached to Hs4/LG18.9.25! The form of these curves shew how… | ||
| Scan015 | Report page detailing tests on engine efficiency, ignition timing, and the effects of a cooled exhaust valve on detonation. | ||
| View original record | contd :- -5- The brake efficiency naturally falls as the load is reduced, due to the friction and pumping losses assuming a relatively greater proportion to the power developed, but it will be seen… | ||
| Scan016 | Engine detonation characteristics, ignition systems, and proposed modifications. | ||
| View original record | contd :- -6- The detonating characteristics of this engine seem little different to those of the std. Phantom and it is unlikely that any appreciable higher compression ratio could be employed than… | ||
| Scan017 | Graph comparing power output, ignition advance, and B.M.E.P. against R.P.M. for a new aluminum engine and a standard engine. | ||
| View original record | POWER OUTPUT & IGNITION ADVANCE For The New ALUM. ENG. And STD ENGINE. SPARK ADVANCE. DEGREES. B.H.P. B.M.E.P. lbs/□" R.P.M. SINGLE IGN ON LIGHTER PHANTOM. SYNCHRONISED IGN. STD ENG. SYNCHRONISED IGN.… | ||
| Scan018 | Comparison of engine efficiency using one versus two synchronized spark plugs under full and throttled load conditions. | ||
| View original record | Top Graph: PINTS/B.H.P./HOUR B.M.E.P. ▲ TWO PLUGS SYNCHRONISED. ⊙ ONE PLUG. CARB. SIDE OF ENGINE. LIGHTER PHANTOM ENGINE. SPECIFIC CONSUMPTION WITH ONE & TWO IGNITIONS. 4.69 TO 1 COMP. RATIO. CURVE… | ||
| Scan020 | Experiments on measuring Phantom cylinder wall temperatures. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to RG. E. c. to DA. BY. c. to CY. ORIGINAL Hs/ACLL/LGS.10.26. X9050 X1643 PHANTOM CYLINDER WALL TEMPERATURE. During some experiments in connection with over-oiling… | ||
| Scan021 | Engine cylinder temperature readings using a thermocouple, including test conditions and a table of results. | ||
| View original record | contd :- -2- ARRANGEMENT OF THERMO COUPLE. DIAGRAM LABELS: CYL. WALL Ni Fe GALVANOMETER THERMOMETER COLD JUNCTION Temperature readings were taken at the following places :- A. 1.875 inches from the… | ||
| Scan022 | The effects of compression ratio on heat flow and cylinder temperatures, with plans for further tests on Phantom and Falcon X engines. | ||
| View original record | CONTD :- -3- .2" and having to pass about 9 B.T.U's per min/sq.in. we should expect the temperature of the other side of the walls to only be about 3°C higher. With regard to compression ratio it is… | ||
| Scan023 | High-speed performance and acceleration of the Phantom and 20 HP cars compared to competitors like Vauxhall. | ||
| View original record | To R. from Ha/Rn. c.c. to BJ. Wor.✓ c.c. to RG.✓ E. c.c. to DA. EY. ORIGINAL. Hs/Rn4/LG6.10.26. HIGH SPEED PERFORMANCE. X3542 4469.? We are continually having the wonderful speeds and accelerations of… | ||
| Scan024 | Performance review of the 20 HP and Phantom models, with comparisons against Sunbeam, Chrysler, Lincoln, and A.C. cars. | ||
| View original record | contd :- -2- are remarkably light. Some of the bodies being supplied with the 20 HP. give a car weight unladen of over 35 cwts., this naturally kills performance. On every side, however, larger… | ||
| Scan025 | The performance of a Lincoln's rear suspension and a 6-cylinder A.C. engine. | ||
| View original record | contd :- -3- The rear suspension of the Lincon was remarkably good throughout its whole range. The 6-cyl. A.C. engine is fitted with an absolutely normal A.C. touring body complete with standard wings… | ||
| Scan026 | Performance comparison table for various cars over different measured distances. | ||
| View original record | CAR. | Type of body. Remarks etc. | Standing 1/4 mile. Secs. | Standing 1/4 mile. AV.MPH. | Standing 1/2 mile. Secs. | Standing 1/2 mile. AV.MPH. | Flying 1/2 mile. Secs. | Flying 1/2 mile. AV.MPH.… | ||
| Scan027 | Bar chart comparing the 'Displacement / Ton Mile' of various closed and open cars. | ||
| View original record | DISPLACEMENT / TON MILE CLOSED CARS. CHRYSLER 23/75 - 8260 RENAULT 45 - 7830 BENTLEY 6.5 LITRE. - 7500 LINCOLN 5.9 LITRE. - 7310 DAIMLER 35. - 6410 PHANTOM R.R - 6120 20 H.P. R.R - 5360 OPEN CARS.… | ||
| Scan028 | Power curve graph for a 6-cylinder, 2-litre A.C. engine. | ||
| View original record | 6-CYL. 2-LITRE A. C. POWER CURVE. B.H.P. R.P.M. -110 M.E.P B.H.P ---100 M.E.P. 90 M.E.P. SINGLE CARBURETTER. 2 VALVES PER CYLINDER - inlet larger than exhaust. OVERHEAD CAMSHAFT. | ||
| Scan029 | Outlining conclusions from reports on the fault 'Explosion in Silencer'. | ||
| View original record | ORIGINAL To R. from Hs/AJL. c. to EH. Wor. c. to Rg. E. c. to Da. By. c. to Ov. Hs/AJL1/T7.10.26 EXPLOSION IN SILENCER. X93/X8230 Attached herewith are reports on this fault. The conclusions are :-… | ||
| Scan030 | Tests concerning explosions in the silencer of a Phantom chassis. | ||
| View original record | Ha/ALL/T7.10.26. EXPLOSIONS IN SILENCER (PHANTOM) We have carried out a series of tests on the above fault which is present in some degree on all Phantom chassis, with the following results.… | ||
| Scan031 | Engine governor control issues, throttle problems, and resulting explosions or gurgles. | ||
| View original record | -2- Contd. (b) If the governor controls are set correctly and work freely there is no possibility of the governor opening the throttle or preventing it from closing at speeds above three to five miles… | ||
| Scan032 | Eliminating engine explosions by adjusting the fuel mixture in the induction system. | ||
| View original record | -3- Contd. carburation is at full weak than when full strong. As in (a) and (b) a leak in the induction system greatly intensifies explosions, they are decidedly more noticeable under all carburetter… | ||
| Scan033 | Engine throttle issues, slow running, and causes of firing in the silencer related to throttle wear and carbon deposits. | ||
| View original record | -4- Contd. the extra petrol could be used without upsetting the normal slow running of the engine; it was found that the smallest throttle opening necessary to run the engine is 1 1/2°, this gives a… | ||
| Scan034 | Throttle closing issues caused by gummy carbon deposits and worn spindle bearings. | ||
| View original record | -5- Contd. (a) The effect of the gummy carbon deposit (a) is to prevent the throttle from closing fully if released slowly; if it is released quickly the throttle overcomes the resistance of the… | ||
| Scan035 | List of general tests carried out regarding explosions in the silencer. | ||
| View original record | -6- Contd. We give below a list of more general tests which have been carried out with regard to explosions in the silencer :- (1) A leak was made in the induction pipe and compensated for by… | ||
| Scan036 | List of checks and potential improvements to resolve an unspecified engine fault. | ||
| View original record | Contd. -7- (a) Correctly set, and free governor operation. (b) Good fitting throttbe. (c) Good throttle spindle bearings. (d) Clean throttle. (e) Sound non-leaking induction system. (f) Carburetter… | ||
| Scan037 | Investigations into silencer explosions in the Silver Ghost, comparing them to the Phantom model. | ||
| View original record | He/AJL2/T7.10.26. EXPLOSIONS IN SILENCER (SILVER GHOST) In connection with investigations carried out on Phantom cars relative to explosions in the silencer, we have carried out similar tests on a… | ||
| Scan038 | Comparison of ignition and throttle mechanisms between the Silver Ghost and Phantom models. | ||
| View original record | -2- Contd. We are now assuming that ignition of small charges is completed in the cylinder on the Silver Ghost but in the case of the Phantom ignition commences in the cylinder and is completed in the… | ||
| Scan039 | Report comparing silencer explosions and fuel mixture requirements for the Silver Ghost and Phantom models. | ||
| View original record | -3- Contd. Once the correct mixture for silencer explosions is obtained on a Silver Ghost, the explosions are equally as violent and numerous as on a Phantom under similar conditions. It was noticed… | ||
| Scan040 | Performance and design of chassis generator and regulator systems, referencing previous reports and experience with various manufacturers. | ||
| View original record | To R. from EFC. c. to BJ. PN. c. to E. Da. c. to Wor. Rg. c. to Ey. EP. c. to CX. Hn/NRC. EFC3/T8.10.26. ++ CHASSIS GENERATOR AND REGULATOR SYSTEMS. X14 02 X8780 Referring to Mr. Olley's letter… | ||
| Scan041 | Continued discussion on dynamo systems and battery charging characteristics. | ||
| View original record | Contd. -2- EFCL/T8.10.26. extent we desire by the use of a suitable proportion of series coil. An objection to carrying it too far is that the system becomes less suitable for operation with the… | ||
| Scan042 | The feasibility and reliability of adding an automatic electro-magnetic switch to the dynamo's electrical system. | ||
| View original record | Contd. -3- EFC1/T8.10.26. EFC1/T12.6.26, under cover of EFC3/T16.6.26, referred to by Mr. Olley. It is possible to make such an addition to an at present third brush or otherwise inherently regulated… | ||
| Scan043 | Analysis of an electrical system's reliability concerning the ignition apparatus, ballast resistance, and a relay switch. | ||
| View original record | -4- Contd. the same order as that of the ignition apparatus in respect of its ballast resistance. Further than this, it is to be noted that the functioning of certain other parts of the electrical… | ||
| Scan044 | Description of the operation of a dynamo charging system with an automatic switch. | ||
| View original record | -5- Contd. of this switch, one of which is a pure volt coil operating directly from the voltage of the system, and the other of which is a coil in series with the supply to the headlamps. Supposing… | ||
| Scan045 | Comparison of three devices for preventing battery overcharging, with a detailed description of the bi-metal strip based Mentor device. | ||
| View original record | -6- Contd. at its full charging rate whenever the headlamps were on circuit. On switching off the headlamps the voltage would proceed to rise and shortly afterwards the electro-magnetic switch would… | ||
| Scan046 | Comparison of three electrical system devices: a voltmeter, a 'Mentor' device, and an electro-magnetic switch, based on human interaction. | ||
| View original record | -7- Contd. Now comparing these three devices in the reverse order :- (1) The voltmeter necessitates two units of human element for its satisfactory use - it has to be observed and then an operation of… | ||
| Scan047 | Tests on hydraulic shock dampers for steering on a lighter axle, comparing load requirements for British and Continental conditions. | ||
| View original record | To R. from Hs/Wm. c. to BJ. Wor. ✓ c. to RG. E. ✓ c. to DA. BY. ✓ ORIGINAL Hs/Rm2/L.08.10.26. X235 X8430 STEERING HYDRAULIC SHOCK DAMPERS - LIGHTER AXLE. [The word 'SHOCK' is struck through] We have… | ||
| Scan048 | Flexibility test on pedestal pistons compared to standard pistons. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor.✓ c. to RG. E.✓ c. to DA. BY.✓ ORIGINAL PEDESTAL PISTONS. X8040 X7040 We have several sets of pedestal pistons in use on test engines and cars and have found them to… | ||
| Scan049 | Piston flexibility tests, including a diagram of the test rig and a table of results. | ||
| View original record | contd :- -2- BLUEPRINT DIAGRAM TEXT: CLOCK GAUGES 'V' PIECE PISTON 30 lbs WT. 2.50 TABLE: PISTON. | LOAD. LBS. | DEFLN: OF POINT 'A'. | FLEXIBILITY REL: TO STD: PISTONS. Present standard. | 30 | .007"… | ||
| Scan050 | Whitemetal bearing tests, examining load carrying capacity with speed and the effect of shell thickness. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY. ORIGINAL Hs/Rm1/LG1 2.10.26. WHITEMETAL BEARING TESTS. X4633 X1643 (1) Variation in load carrying capacity with speed. We have carried out a… | ||
| Scan051 | Continued report on tests concerning the effect of oil temperature and pressure on bearing life. | ||
| View original record | contd :- -3- (3) We are further carrying out tests to determine the effect of varying oil temperature and pressure on the life of the bearing. Hs/W.A.Robotham | ||
| Scan053 | Investigation into an audible knock from hydraulic shock dampers caused by a small amount of free movement. | ||
| View original record | To R. from Hs/Rn. BJ. WOR. RG. E. DA. BY. Hs/Rn2/LG12.10.26. X235 HYDRAULIC SHOCK DAMPERS. We have had a case of hydraulic shock dampers wearing sufficiently to cause an audible knock on the front of… | ||
| Scan054 | Undesirable features found during tests of a hydraulic steering damper. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY. ORIGINAL Hs/Rm5/LG12.10.26. x235 x8430 HYDRAULIC STEERING DAMPER. Further tests have shewn up one or two undesir- able features of the… | ||
| Scan055 | Effectiveness of hydraulic damping versus frictional load in the steering system. | ||
| View original record | contd :- -2- Thus for quick reversals of minute amplitude the frictional load is more effective than the spring controlled hydraulic damping, which is more constant over its whole range. The friction… | ||
| Scan056 | Tests and apparatus for measuring gas leakage past pistons. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to RG. E. c. to DA. EY. ORIGINAL Hs/ACL1/LG12.10.26. TESTS ON GAS LEAKAGE PAST PISTONS. X858 X8040 At various times we have encountered troubles on our different… | ||
| Scan057 | Test on air leakage during compression on a standard Phantom engine, with results tabulated by RPM. | ||
| View original record | contd :- -2- The amount of air used is measured by water replacement in a container having a calibrated gauge glass at the side. The action of the container is such that a small drop of pressure due… | ||
| Scan058 | Engine leakage tests, noting variations with speed and outlining a new method for taking temperature readings. | ||
| View original record | contd :- -3- It will be seen that the leakage falls as the speed increases. Other variations we have noted is with a cold engine when at 500 r.p.m. the leakage was nearly one cu.inch per stroke. This… | ||
| Scan059 | Cylinder and liner temperature tests on the Lighter Phantom engine to investigate piston ring carbonisation. | ||
| View original record | To R. from Hs./ACL1. c. to BJ. cor. c. to RG. E. c. to DA. BY. ORIGINAL Hs/ACL1/LG18.10.26. LIGHTER PHANTOM ENGINE - CYLINDER AND LINER TEMPERATURE. Handwritten: X8050, X3866, X8840 In view of the… | ||
| Scan060 | Positioning of couples in a cylinder and the parameters for engine testing, including diagrams. | ||
| View original record | contd :- -2- Six couples were used altogether on the pressure side of the cylinder bore and a sketch shews the position of these couples. It will be seen that the top position is just below the level… | ||
| Scan061 | Analysis of liner and cylinder temperatures comparing aluminium and cast iron cylinders under different operating conditions. | ||
| View original record | contd :- -3- The appended curves are the results and shew the temperature of the top of the liner and cylinder wall for the different speeds also the B.M.E.P. maximum developed at the time. From these… | ||
| Scan062 | Test report on engine pre-ignition, liner temperatures, and the effects of varying oil pressure. | ||
| View original record | contd :- -4- without further drop in power. The pre-ignition was not as severe as we have experienced and gave no popping back in the carburetter. With pre-ignition the top of the liner temperature… | ||
| Scan063 | Summary of engine test results regarding cylinder liner temperatures, pre-ignition, and oil flow. | ||
| View original record | contd :- -5- The chief thing this latter test proves is that the cyl. skirts are cooled to a certain extent by the oil spray as would be imagined. SUMMARY. (1) Up to the present after 39 hrs. running… | ||
| Scan065 | Scheme for fitting dampers to front brake drums to eliminate squeaking. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. RG. c. to DA. BY. ORIGINAL SQUEAKING BRAKES. X7420 / X8420 We consider it is important that we should have a scheme for fitting dampers to the front brake drums… | ||
| Scan066 | Suspension systems from the Paris Salon, focusing on the Cottin-Desgouttes model. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY. ORIGINAL PARIS SALON. X3609 X.1040 Hs/RmL/LG22.10.26. SUSPENSION. The two radical departures from the standard practice at the Paris Show… | ||
| Scan067 | Road test report on an experimental car, detailing issues with suspension, steering, brakes, and a noisy engine and rear axle. | ||
| View original record | contd :- -2- would have to work, there does not appear to be any means of automatically lubricating them: grease gun nipples being relied on. The car tried on the road was fitted with a Weymann body.… | ||
| Scan068 | The suspension and handling characteristics of Sizaire and 10-HP Ansaldo cars, with comparisons to others. | ||
| View original record | contd :- -3- been for the serious drawback of 'rolling'. Sizaire. The suspension of this car is almost identical with the Cottin-Desgouttes (again relying on grease-gun lubrication for the universal… | ||
| Scan069 | Report page with diagrams and analysis of a car's chassis, suspension, and on-road performance. | ||
| View original record | contd :- -4- SUPPORT CARRIED TO REAR OF GEAR BOX. WIDELY SPACED REAR SPRINGS. TRUNNION BEARING. The lateral stability is obtained by a very wide frame at the rear and two semi elliptic as near the… | ||
| Scan070 | Comparison of vehicle suspension systems, detailing the Farman rear cantilever leaf spring design. | ||
| View original record | contd :- -5- has been incorporated some good workmanship. The impression we got from the short run we had on this car was that the front suspension from the driving seat was very little, if any,… | ||
| Scan071 | Technical page discussing axle control and suspension systems with blueprint diagrams. | ||
| View original record | contd :- -6- springing, a stabiliser is fitted between the rear axle and the frame, which presumably prevents rolling. AXLE CONTROL. On some cars such as the Itala, both the front and rear axles have… | ||
| Scan072 | Axle control, Hotchkiss drive, and a General Motors device for eliminating crankshaft torsional vibration. | ||
| View original record | contd :- -7- are fitted giving axle control and enabling a Hotchkiss drive to be used, see sketch. A number of cases of off-set rear springs were noticed arranged to give gretaer resistance to braking… | ||
| Scan073 | Air cleaners and a review of the O.S. Petrol Gauge, including a diagram. | ||
| View original record | contd :- -8- out-of-step periodicity of this inertia spring element damps it out. AIR CLEANERS. The most popular air cleaner at the Show appeared to be the A.C. O.S. PETROL GAUGE. We were interested… | ||
| Scan074 | Page discussing the stream-lining of a record-breaking Renault and a summary of independent suspension test results. | ||
| View original record | Contd :- -9- Record-breaking Renault. This car is rather interesting as an example of stream lining. The width of the body being only some 6" greater than that of the steering wheel width. The whole… | ||
| Scan075 | Summary of tests carried out to overcome squeaks from front brakes fitted to a 12-EX model. | ||
| View original record | To R. from Hs/GWH. c. to BJ. Wor. c. to RG. E. c. to BY. DA. ORIGINAL X7420 SUMMARY OF TESTS CARRIED OUT TO OVERCOME SQUEAKS FROM FRONT BRAKES FITTED TO 12-EX. We have been able to damp out all normal… | ||
| Scan076 | Continued discussion on vibrations caused by the non-wrapping shoe acting as a wrapping shoe when the car is reversing. | ||
| View original record | contd :- -2- We can produce the same effect when reversing the car, the non-wrapping shoe which then becomes the wrapping shoe, creates the vibrations. Hs/G.W.Hancock. | ||
| Scan077 | Explaining why a new, lighter type of front brake axle is more prone to squeaking and the proposed solution. | ||
| View original record | To R. from Hs/GWH c. to BJ. Wor.✓ c. to RG.✓ E. c. to DA. BY.✓ ORIGINAL Hs/GWH/LG25.10.26. WHY THE NEW TYPE FRONT BRAKES FITTED TO X7420 AXLE G.74294 ARE MORE PRONE TO SQUEAK THAN THE PRESENT… | ||
| Scan078 | The receipt and testing of an American Bosch battery ignition unit. | ||
| View original record | To R. from EFC. c. to E. By. c. to Wor. Oy. c. to BJ. ORIGINAL EFC3/T26.10.26. X4652 X4275 AMERICAN BOSCH BATTERY IGNITION EQUIPMENT. We have received from Mr. Olley one duplex unit of American Bosch… | ||
| Scan079 | Preliminary examination of an American Bosch ignition coil and distributor unit fitted to a chassis in America. | ||
| View original record | EFC. WB.108. COPY. 25.10.26. X.4275. AMERICAN BOSCH IGNITION COIL AND DISTRIBUTOR AS FITTED TO RR. CHASSIS IN AMERICA. PRELIMINARY EXAMINATION. This unit as received consisted of two ignition coils… | ||
| Scan080 | Compact and well-designed battery ignition unit, noting its performance and evolution. | ||
| View original record | -2- Contd. The whole unit is compact and finished off remarkably well, everything being easily detachable, and designed evidently with a view to providing the minimum amount of attention. Battery… | ||
| Scan081 | Technical merits and continued experimental work on the Lucas type ER6 magneto. | ||
| View original record | To R. from EFC. c. BJ. By. c. Wd. Roy. ORIGINAL RE LUCAS TYPE ER6 MAGNETO. X8793 It is understood that you view with disfavour any further negotiations with the Lucas Co. incident upon further… | ||
| Scan082 | Proposal to consider using a Lucas magneto as a second-string option, noting the company's two-year guarantee. | ||
| View original record | -2- Contd. Should we not consider this Lucas magneto as our second string ? The Lucas Company now give a two years' guarantee against failure of any parts of their magnetos. EFC. | ||
| Scan083 | Preliminary test report on the 20 HP Lorraine car, evaluating the power unit, carburation, and crankshaft vibration. | ||
| View original record | To R. from Hs/Rm. c.c. to BJ. Wor. c.c. to RG. E. c.c. to DA. EY. c.c. to CW BAPN. c.c. to Hm. ORIGINAL Hs/ Rm1/LG6.11.26. 20 HP. LORRAINE. X3588 With reference to RL/M2.11.26. we have carried out… | ||
| Scan084 | Page 2 of a report on main shaft period, running temperature, and a comparative acceleration test between 20 HP models and a Lorraine. | ||
| View original record | contd :- -2- Our belief that the main shaft period is at 3800-3900 r.p.m. is strengthened by the fact that we can detect a definite, but very slight period at 1250-1300 r.p.m. or one third of the main… | ||
| Scan085 | Performance comparison between the 20 HP RR and the Lorraine car, analysing engine characteristics and anticipating bench test results. | ||
| View original record | contd :- -3- CAR. | WEIGHT. CWTS. | GEAR RATIO. | ENGINE CAPACITY. 20 HP. RR. | 31 | 4.20 | 3180 Lorraine. | 33 | 3.60 | 3447 The M.E.P. of the high compression 20 HP. is about 8% better than… | ||
| Scan086 | Investigation and comparison of an American Bosch ignition coil against the company's own standard coils. | ||
| View original record | To R. from EFC. c. BJ. Wor. c. Oy. By. c. Rg. ORIGINAL AMERICAN BOSCH BATTERY IGNITION EQUIPMENT. Further to our EFC3/T25.10.26, we have now investigated the quantities of the coil of one of the… | ||
| Scan087 | The construction and features of an American Bosch Ignition Coil Type TC.30. | ||
| View original record | EFC. WB.109. 5.11.26. AMERICAN BOSCH IGNITION COIL TYPE TC.30 AS USED ON RR.CHASSIS IN U.S.A. The special feature of this coil, apparently is that the secondary is wound next to the core and the… | ||
| Scan088 | Test report on the lubrication and wear of an American Mechanics Joint fitted to a 20 HP car's propeller shaft over 14,215 miles. | ||
| View original record | To R. from HS/AJL. ORIGINAL HS/AJL/T9.11.26. c. to BJ. Wor. c. to Rg. E. c. to Da. By. c. to Cy. 25320 AMERICAN MECHANICS JOINT. X4183 We have run a 20 HP. car (9-GIII) with the propeller shaft fitted… | ||
| Scan089 | Comparison of the American Mechanics Joint with an existing joint, focusing on lubrication needs, simplicity, and cost. | ||
| View original record | Contd. -2- Hs/AJL1/T9.11.26. The absence of the necessity for lubrication during service is a very great disadvantage. Any modification that reduces the number of points to be lubricated during… | ||
| Scan090 | The general running performance of the 4th Falcon X wet liner engine, detailing water leaks and power loss. | ||
| View original record | To R. from Hs/VH. c. to BJ. Wor.✓ c. to RG. E. c. to BY.✓ ORIGINAL Hs/VHl/LG9.11.26. 4th. FALCON X, WET LINER ENGINE. X3804 X3996 GENERAL RUNNING. This has been so far satisfactory. We have not been… | ||
| Scan091 | Engine endurance test, noting power increase, gummed piston rings, and a magneto issue. | ||
| View original record | contd :- -2- B.4. cyl., the engine showed an increase of 7 C/B.HP. when compared with the power at the start of the 12 hrs. run. It is possible therefore that the piston rings were partially gummed up… | ||
| Scan092 | Tests to determine gas leakage past pistons on a Phantom engine. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to RG. E. c. to DA. BY. ORIGINAL HS/ACL2/LG9.11.26. X858 [crossed out] X.8040 GAS LEAKAGE PAST PISTONS ON PHANTOM. We have carried out some tests to determine the… | ||
| Scan093 | Report discussing piston ring leakage test results at different speeds and pressures, and proposing further tests. | ||
| View original record | contd :- -2- The results of two speeds are given - 500 and 1000 r.p.m. - and it is interesting to note how the leakage per stroke is considerably less at the higher speed which we think is due to the… | ||
| Scan095 | Summary of troubles experienced with Watford Magnetos, detailing failures in wiring, distributors, and mechanical components. | ||
| View original record | To R. from Hs/Rn. c. to BJ. Wor. c. to RG. E. c. to BY. DA. ORIGINAL Hs/Rn2/LG9.11.26. WATFORD MAGNETOS. XJ875 The following is a summary of the troubles we have experienced with these magnetos so far… | ||
| Scan096 | Issues with locking magneto components due to rushed production and design flaws. | ||
| View original record | contd :- -2- (6) Locking of components. There are a number of cases of studs etc. which cannot be locked up owing to the split pin holes being drilled in the wrong place. It will be evident from the… | ||
| Scan097 | Experiments on torsional vibrations in 20 HP and Phantom engines. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor.✓ c. to RG. E.✓ c. to DA. EY.✓ c. to OY. ORIGINAL Hs/ACLl/LG9.11.26. TORSIONAL VIBRATIONS ON 20 HP; & PHANTOM X634 X5010 X8010 Further tests have been made on the 20… | ||
| Scan098 | Crankshaft vibration, critical speed, and the effects of flywheel friction torque and slipper wheel dampers. | ||
| View original record | contd :- -2- resisting motion relative to the crankshaft was varied between 400 and 2000 lbs.ins. and vibration diagrams recorded between these values. Within these limits it was found that the… | ||
| Scan099 | Crankshaft and flywheel torsional vibration experiments, including findings on the Phantom model. | ||
| View original record | contd :- -3- free on the crankshaft. We have calculated that this assumed higher resonant speed would be at 6580 r.p.m. The system considered being the crankshaft unit without the flywheel and the… | ||
| Scan100 | Analysis of crankshaft vibration and internal damping, comparing a Phantom engine with a 20 HP engine. | ||
| View original record | contd :- -4- resonance as indicated by the three crests on the diagram. The same diagram reduced to a flat base is given as a comparison with the 20 HP; and we see that the amplitude is less than with… | ||
| Scan101 | Engine vibrations and the theoretical effectiveness of different damper types. | ||
| View original record | contd :- -5- In the case of the Phantom not only do we find that the critical amplitude is less than the 20 HP. but the lower vibrations - or harmonics - are correspondingly less severe and on the… | ||
| Scan102 | Continued memorandum discussing resonance effects and estimation methods for six-cylinder crankshafts. | ||
| View original record | contd :- -6- very high, after the 2400 r.p.m. had been exceeded, we should expect to be free from resonance effects at both speeds. We are preparing some notes on the method we employ for estimating… | ||
| Scan105 | Graph comparing torsional vibration amplitudes at critical speed for the Goshawk and Phantom models without external damping. | ||
| View original record | TORSIONAL VIBRATIONS COMPARISON OF VIBRATION AMPLITUDES AT THE CRITICAL SPEED ON PHANTOM & 20 H.P. WITHOUT ANY EXTERNAL DAMPING PLAIN LINE GOSHAWK. DOTTED LINE PHANTOM. AMPLITUDE OF VIBRATION DEGREES.… | ||
| Scan106 | Graph of torsional vibration curves showing amplitude reduction with decreased frictional mounting of the flywheel. | ||
| View original record | TORSIONAL VIBRATIONS CURVES SHOWING REDUCTION IN AMPLITUDE OF VIBRATIONS WITH DECREASE IN THE FRICTIONAL MOUNTING OF THE FLYWHEEL AMPLITUDE OF VIBRATION DEGREES CRANK ANGLE DEGREES NON-RIGID FLYWHEEL… | ||
| Scan108 | American Bosch battery ignition, referencing a photostat copy of a Delco coil for comparison. | ||
| View original record | To R. from EFC. c. to RJ. EFC1/T11.11.26. RE AMERICAN BOSCH BATTERY IGNITION. X4275 X4284 Further to our EPC2/T8.11.26, herewith we send you photostat copy of the Delco coil which is constructed on… | ||
| Scan109 | Inconsistent and unsatisfactory results of white metal bearing tests. | ||
| View original record | To R. from Hs/Rml c. to BJ. Wor. c. to RG. E. c. to EY. ORIGINAL Hs/Rml/T12.11.26. WHITE METAL BEARING TESTS. X4633 We are not very satisfied with our white metal bearing test results. Whilst we can… | ||
| Scan110 | Tests on bearings, focusing on the effects of oil temperature and pressure on bearing life and failure load. | ||
| View original record | To R. (Contd). -2- Hs/Rml/T12.11.26. We have also carried out tests running bearings with a mean oil entering temperature of 100°C. The average load at which failure occurs under these conditions is… | ||
| Scan112 | Ongoing steering problems with the 20 HP model and detailing proposed modifications and comparisons to the Phantom model. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY. ORIGINAL. STEERING. X8430 X5430 X5450 With reference to R4/6.11.26. We are pressing forward with the hydraulic steering dampers and the… | ||
| Scan113 | Steering system tests, focusing on spring control, high-speed wobbles, and pivot lean adjustments for various car models. | ||
| View original record | contd :- -2- springs are only at one end of the tube. Also for the same reason the spring controlled movement of the balls is much less relatively than the latest design for the Phantom N.sch.2258… | ||
| Scan114 | Continued note on page 3 discussing the emphasis of road shocks. | ||
| View original record | contd :- -3- lean emphasises road shocks but are confirming this. Ha/Ws. | ||
| Scan115 | Torque-speed characteristics and stalling conditions of tested EAC motors for a sequence starter. | ||
| View original record | To AJS. from EFC. c. to HJ. EY. ORIGINAL EFC./113.11.26. SEQUENCE STARTER X7620 Answering the first portion of your AJS1/M9.11.26, please find attached a curve of the average torque-speed… | ||
| Scan116 | Explosions in the silencer and comparing governor throttle control with positive hand control. | ||
| View original record | To R. From Hs/AJL. c. to BJ. Wor. c. to RG. H. c. to BY. DA. ORIGINAL EXPLOSIONS IN SILENCER. THROTTLE CONTROL. Handwritten notes: X93 X8230 XS140 X3476 Tests we have carried out indicate that a… | ||
| Scan117 | Troubleshooting explosions in the silencer caused by misadjusted throttle and governor controls. | ||
| View original record | contd :- -2- It is very important that all controls be adjusted to ensure that the throttle closes when the governor lever is at the bottom of the quadrant. In previous reports we have emphasised very… | ||
| Scan118 | Analysis of engine explosions under small throttle conditions, comparing the Phantom and Silver Ghost models. | ||
| View original record | contd :- -3- lever is set to drive the car, consequently the range over which explosions can occur is relatively small. Our recommendations for reducing explosions to a minimum were given in… | ||
| Scan119 | Continuation of a report comparing performance to the Phantom and mentioning a future report on a roller bearing throttle. | ||
| View original record | contd :- -4- slightly quieter than the Phantom and absorbed considerably more H.P. We hope to be in a position to report on the roller bearing throttle in the course of the next few days.… | ||
| Scan120 | Progress and delays on chassis X7770, with a completion estimate. | ||
| View original record | To R. from Hs. c. to BJ. Mor. c. to RG. E. c. to DA. BY. ORIGINAL Hsl/LG15.11.26. EAC.7. CHASSIS. X7770 This complete chassis will be running in 14 days. In spite of the rush on F.X., work on this… | ||
| Scan121 | With a blueprint sketch of a combustion chamber from a Lorraine car. | ||
| View original record | To R. From Hs/Rm. c. to HJ. Wor. c. to RG. E. c. to DA. BY. ORIGINAL Hs/Rm/LG15.11.26. LORRAINE CAR. X3588 Attached herewith is a sketch of the Combustion Chamber on the Lorraine car which we think… | ||
| Scan122 | Unfused wiring connection for illuminated instruments and proposing a safer alternative. | ||
| View original record | ORIGINAL. To Da. from EFC. EFC8/T16.11.26. X.8530 FRAMED INSTRUMENTS WITH INTERIOR ILLUMINATION N.Scheme 2224. On the above Scheme the connection to the indicating lamp, via the Cambridge thermometer,… | ||
| Scan123 | Cover memo for a list of complaints regarding the Phantom and 20 HP cars over a three-month period. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to RG. E. c. to DA. Hn. c. to EY. ORIGINAL. Hs3/LG16.11.26. x4117 x4118 COMPLAINTS - PHANTOM & 20 HP. Attached herewith is a list of the principal complaints on the 20… | ||
| Scan124 | Quarterly complaints report for the 40/50HP Phantom model, listing the 12 worst issues for the quarter ending Sept 30th. | ||
| View original record | COPY. QUARTERLY COMPLAINTS - 40/50HP. PHANTOM. From the records we have kept of cars received at W. during the quarter ending Sept. 30th., the following are the 12 worst points :- | Nature of… | ||
| Scan125 | Quarterly report listing the 12 worst complaints for the 20 HP car model for the quarter ending Sept. 30th. | ||
| View original record | COPY. QUARTERLY COMPLAINTS - 20 HP. From the records we have kept of cars received at W. during the quarter ending Sept. 30th; the following are the 12 worst points :- Nature of Complaint. | No: of… | ||
| Scan126 | Complaints for the 20 HP model, comparing issues between pre-India and India series cars. | ||
| View original record | contd :- -2- 20 HP. COMPLAINTS. | Nature of Complaint. | No. of cars. Prior to India. | No. of cars. India Series. | Has a cure been found or not? | | :--- | :--- | :--- | :--- | | Broken front… | ||
| Scan127 | The results of fitting a Phantom throttle with roller bearings to reduce governor control lag. | ||
| View original record | To R. from Hs. c.c. to EJ. Mor. ✓ c.c. to RO. E. ✓ c.c. to DA. EY. ✓ PHANTOM THROTTLE. L8140 We have had a car running fitted with the roller bearings in the throttle spindle. The lag on the governor… | ||
| Scan128 | Steering problems on early Phantom cars and proposing a remedy. | ||
| View original record | To B.J. ) FROM HS. To R. ) c. to Wor. RG. c. to E. DA. c. to BY. ORIGINAL Hs2/LG16.11.26. PHANTOM CARS - BJ20/E12.11.26. Y8770 Y8430 We suggest that in most cases the adverse criticism of the Phantom… | ||
| Scan129 | Summary of ongoing customer complaints regarding exhaust, throttle, and springing issues on various car models. | ||
| View original record | contd :- -2- springs in the side steering tube. This is what the Paris Depot are doing almost daily to keep customers in France reasonably happy. With the complaints such as banging in the exhaust and… | ||
| Scan130 | Performance curves and the lower efficiency of a sequence starter motor compared to a 6' motor. | ||
| View original record | To AJS. from EFC. ORIGINAL EFCa/T19.11.26. SEQUENCE STARTER MOTOR. K7670 As requested, we now send to you curves shewing the amperes for each torque and the efficiency for each torque, for the… | ||
| Scan131 | The controllability and lag of the Phantom throttle governor, comparing different bearing setups and the Silver Ghost model. | ||
| View original record | To R. from Hs/AJL c.c. to BJ. Nor.✓ c.c. to RG.✓ E. c.c. to DA. WY.✓ ORIGINAL: Hs/AJL1/LG19.11.26. PHANTOM - THROTTLE GOVERNOR. X8140 X3443 Attached are diagrams illustrating the controlability of the… | ||
| Scan132 | The advantages of fitting ball and roller bearings to the governor shaft and throttle to improve performance. | ||
| View original record | contd :- -2- on the governor lever shaft. The advantage given by this alteration is not evident at low speeds, but is a decided improvement at the higher speeds. Fig. IV. indicates the conditions… | ||
| Scan133 | Recommendations for rectifying complaints and implementing improvements related to throttle and governor shaft components. | ||
| View original record | contd :- -3- that complaints on cars in service be dealt with by fitting the new throttle only; the small advantage gained by the ball bearing governor shaft does not warrant the expense incurred in… | ||
| Scan135 | Graph showing governor lag for chassis 8EX, plotting engine RPM against throttle notches. | ||
| View original record | GOVERNOR LAG (CHASSIS 8EX) ROLLER BEARING THROTTLE. BALL BEARING GOVERNOR. SHAFT ENGINE R.P.M. 1500 1250 1000 750 500 250 DOWN UP NOTCHES ON QUADRANT. 5 10 15 20 25 30 FIG II. | ||
| Scan136 | Graph plotting engine RPM against quadrant notches to compare governor lag between a roller bearing throttle and a standard governor on chassis 8 EX. | ||
| View original record | ENGINE R.P.M. 1250 1000 750 500 250 0 GOVERNOR LAG CHASSIS 8 EX. ROLLER BEARING THROTTLE. STANDARD GOVERNOR DOWN UP NOTCHES ON QUADRANT. 5 10 15 20 25 30 FIG III | ||
| Scan137 | Graph showing governor lag on chassis 8EX, comparing a standard carburetter with one using ball bearings in the governor. | ||
| View original record | ENGINE R.P.M. 1250 1000 750 500 250 GOVERNOR LAG CHASSIS 8EX. STANDARD CARBURETTER BALL BEARINGS IN GOVERNOR TO SCHEME 820 (FIG.II) DOWN UP. NOTCHES ON QUADRANT. FIG IV | ||
| Scan139 | Analysis of a steering 'taking charge' issue on the 40/50 HP model, particularly under braking conditions. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to RG. K. c. to DA. EY. c. to OY. ORIGINAL. Hs/Rml/LG23.11.26. 40/50 HP. - STEERING. X843D X842D When all the proposed modifications have been incorporated in the… | ||
| Scan140 | Analysis of front wheel locking under braking and steering heaviness, with a proposed solution to modify the braking distribution. | ||
| View original record | contd :- -2- is very little margin to prevent the front wheels from being locked. Actually, in the extreme case of efficient front brakes and inefficient rear brakes, we believe that in service the… | ||
| Scan141 | Proposed modifications to front braking systems and steering tubes for both open and closed cars. | ||
| View original record | contd :- -3- If therefore the proposed modification is considered too drastic, we suggest that it should be incorporated on closed cars only so that the performance of open cars will not suffer. We… | ||
| Scan142 | Solutions for squeaking brakes on the 40/50 HP model, including rigid drums and flexible shoes. | ||
| View original record | To R. from Hs/An. c.c. to EJ. Wor. c.c. to RG. E. c.c. to DA. By. c.c. to OY. ORIGINAL. Hs/An2/LG23.11.26. 40/50 HP: - SQUEAKING BRAKES. X8420 X7420 Whilst we believe that satisfactory drum dampers… | ||
| Scan143 | Proposal to fit a rear spare wheel carrier to the 7-EX car for Le Canadel. | ||
| View original record | To R. from Hs. c. to BJ. Wor.✓ c. to RG. E.✓ c. to DA. BY.✓ ORIGINAL Hs1/LG26.11.26. 7-EX CAR - FOR LE CANADEL. X8992 XS400 We propose fitting a spare wheel carrier at the rear of this car and the… | ||
| Scan144 | Calculations and proposed alterations for a new sequence starter motor. | ||
| View original record | To AJS. from EFC. c. BJ. BY. ORIGINAL EFC1/T27.11.26. RE SEQUENCE STARTER. V620 We regret we have not been able in our previous note to give you the complete information asked for in your… | ||
| Scan145 | Motor design alterations, efficiency calculations regarding teaser windings, and experiments on the Phantom starter motor. | ||
| View original record | Contd. -2- EFC1/T27.11.26. copies of our calculations in this connection sometime early next week. We do not at the moment see any reason for any other alteration to the design of the motor than the… | ||
| Scan146 | Investigation into a chattering and vibrating oil relief valve on a 20 HP engine. | ||
| View original record | To R. from Hs/AJL. c.c. to RO. BJ. c.c. to Wor. E. c.c. to DA. EY. c.c. to CY. ORIGINAL 20 HP. OIL RELIEF VALVE (LEC.2235). X8205 / X5205 This scheme embodies a bow spring type relief valve in one… | ||
| Scan147 | Test report on modifying a 20 HP pump's low-pressure oil system to reduce chattering by moving the relief valve. | ||
| View original record | contd :- -2- In the next test the low pressure union on the 20 HP. pump was blanked up completely and the intake union of the Phantom relief valve unit connected up to a point on the pump delivery… | ||