Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Circuit arrangement for a green lamp charge indicator, referencing the Silver Ghost model. | ||
| View original record | To R. from EFC. c. BJ. SG. c. Wor. E. c. BY. C. GREEN LAMP CHARGE INDICATOR. X.4040 X.7730 Referring to your RL/M26.12.28, we regret that we cannot understand the circuit therein given. If the cutout… | ||
| Scan002 | The operation and non-standard switching of a green lamp unit and switchbox. | ||
| View original record | To R. From EFC. c. RJ. SG. c. E. WOT. c. Ev. Da. ORIGINAL EFCS/T7.1.29. X4040 GREEN LAMP UNIT & SWITCHBOX. In order that we may be able to operate and observe the operation of the new green lamp… | ||
| Scan003 | Experiments with rubber engine mountings to reduce vibration and roughness on an 'SS' model. | ||
| View original record | To R. from Hs/Rn. c. to BJ. SG. c. to Wor. Hs. c. to DA. BY. c. to E. 7th. Jan. 1929. Hs/Rm2/LG7.1.29. ORIGINAL 'SS' ENGINE MOUNTING. X7005 X7430 We have tried four engine feet isolated with thin… | ||
| Scan004 | Page discussing ineffective dampers and parallel tests being conducted on a 20 HP car. | ||
| View original record | contd :- -2- dampers ineffective. We are carrying out tests in parallel on the 20 HP. car on the lines suggested in your telegram. HS/Rn. | ||
| Scan005 | Drawing of the experimental S.S. engine feet. | ||
| View original record | S.S. Exp. Engine Feet | ||
| Scan006 | Cover note for a report on the 18-EX 'SS' car after a 5,000-mile test, part of a larger 10,000-mile test in France. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to SG. E. c. to DA. BY. c. to EP. ORIGINAL Hs/LG8.1.29 REPORT ON 18-EX 'SS' CAR. AFTER 5,000 MILES. X7941 X7770 We attach copy of report in connection with the above… | ||
| Scan007 | Promising results of 'SS' engine mounting tests using rubber strips to eliminate vibration. | ||
| View original record | To R. from Hs/Rn. c. to B.I. Wor. c. to BG. E. c. to DA. EY. ORIGINAL Hs/Rn2/LCS.1.29. 'SS' ENGINE MOUNTING. X7005 X7430 Further to our Hs2/RN/LG7.1.29. We have now carried out further tests with the… | ||
| Scan008 | 5,000-mile performance report on the 18-EX. S.S. engine and its components. | ||
| View original record | R Bj. E. Da. By. Sg. WOR. To: "Hs" From: G.W.Hancock Hôtel de France, Châteauroux, Indre. Report on 18-EX. S.S. 5,000 miles ENGINE S.S. N° 7 The performance of the engine has been very good. The… | ||
| Scan009 | Faults and performance issues with various engine components. | ||
| View original record | -2- Under normal running conditions the Vacuum Pump maintains sufficient vacuum to operate the Autovac and a plentiful supply of petrol is obtained. Its great failing is when the petrol in the rear… | ||
| Scan010 | The condition of the engine suspension, exhaust system, and radiator studs. | ||
| View original record | -3- cylinder head flange. The present rocker cover leaks oil at the front end due to the felt having become compressed too much, the consequence being the metal of the cover is now resting on the… | ||
| Scan011 | Issues and modifications for various vehicle components including the radiator, bonnet, oil pump, and front axle. | ||
| View original record | -4- we lost 2 gallons of water for every 200 miles run. We found this to be due to the overflow pipes coming in a direct line with the out-flow of water of the top inlet pipe in the radiator. We have… | ||
| Scan012 | Inspection report on brake, suspension, and steering components, noting issues with front dampers and lubrication systems. | ||
| View original record | -5- the drums were covered with black powder. There was no sign of any water having entered the drums. The lubrication of the toggle shafts appeared to be quite O.K. It was necessary to adjust the… | ||
| Scan013 | Flywheel, clutch, and gearbox issues, including observations on noise, wear, and oil leaks. | ||
| View original record | -6- FLYWHEEL & CLUTCH TO L.O.P. G 7659 INFITTED WITH GEAR RING G 77304 AHG STEEL NOT HARDENED. We had considerable trouble with the clutch when the car was first run over here. The clutch would not… | ||
| Scan014 | Inspection report detailing the condition of various vehicle components after mileage. | ||
| View original record | -7- PROPELLOR SHAFT & UNIVERSAL JOINTS TO L.O.P. G 76851 N.S. 2547. We have had no trouble whatsoever with this shaft. We cannot detect any play or wear in the mechanic's joints. Loss of oil from the… | ||
| Scan015 | Faults found in the hand brake, body subframe, and electrical systems of a vehicle. | ||
| View original record | -8- bottom is too acute, thus allowing air to enter the pipe instead of petrol. This can be easily remedied. We have not had any main or reserve working, as this mechanism was not finished when we… | ||
| Scan016 | Test report detailing the car's condition after 9000 miles, including bodywork, paint, petrol consumption, and tyre life. | ||
| View original record | -9- should be observed and noted for any electrical fittings which require an earth when fitted to a body mounted on a subframe. A general examination at the end of 9000 miles has not shown up any… | ||
| Scan017 | Hand-drawn sketch of an exhaust manifold showing areas of burning and scaling. | ||
| View original record | BURNT THROUGH SCALING | ||
| Scan018 | Sketch on graph paper showing a worn engine fabric coupling with elongated holes and a bulged shape. | ||
| View original record | XX ENGINE FABRIC COUPLING HOLES ELONGATED AND COUPLING BULGED | ||
| Scan019 | Pencil sketch of a cantilever leaf spring suspension assembly with handwritten modification notes. | ||
| View original record | This clip fits the subframe and bend the channel up 1/2" on both sides | ||
| Scan020 | List of five engine components or systems. | ||
| View original record | ① Rocker lubrication ② Perfect circle rings 3 Valve springs 4 Vaccuum pump 5 Water pump gland | ||
| Scan021 | Comparison of 'SS' and standard Phantom engine mountings, focusing on radiator rigidity, vibration, and steering. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to SG. E. c. to DA. BY. 'SS' ENGINE MOUNTING. 47005 We have now had an opportunity of comparing the 'SS' (20-EX) with the four torsionally strong engine feet… | ||
| Scan022 | Report comparing the performance of two vehicles, SS. 20-EX and Phantom 8-EX, regarding tyre pressure effects, engine vibration, and steering wobble. | ||
| View original record | contd :- -2- 70 m.p.h. in the district. When we dropped the tyre pressures to 25 lbs/sq.in. the relative merits of the two cars were entirely reversed. The SS. 20-EX was little changed. The movement… | ||
| Scan023 | Technical analysis of steering selectivity and control, comparing various car models and potential improvements. | ||
| View original record | contd :- -3- one a feeling of excellent selectivity and car control, superior to that of the Phantom. Over the critical range from 60 to 70 m.p.h. it was inclined to nibble slightly in sympathy with… | ||
| Scan024 | Summary of test results focusing on frame and engine mounting to eliminate front-end oscillation on the SS model. | ||
| View original record | contd :- -4- Summarising the results of our tests so far :- It would appear that we shall in every way benefit from the SS. type of frame and engine mounting when we eliminate the remaining 10% front… | ||
| Scan025 | Experiments to improve 'SS' engine mounting by testing various components to reduce vibration and booming. | ||
| View original record | To R. from Hs/Rm. c. to BJ. SG. c. to Wor. E. c. to DA. BY. ORIGINAL Hs/Rm2/LG12.1.29. 'SS' ENGINE MOUNTING. X7005 X7250 We are now working exclusively on the last 10% of this movement only i.e. with… | ||
| Scan026 | Bench test results and on-road performance of the 'SS' servo leverage. | ||
| View original record | To R. from Hs/Rm c. to BJ. SG. c. to Wor. DA. c. to BY. ORIGINAL Hs/Rml/LG12.1.29. X7370 'SS' SERVO LEVERAGE. We have now carried out bench tests to determine the efficiency of the SS. servo. We give… | ||
| Scan027 | Analysis of brake distribution and servo torque multiplication with calculations for different schemes. | ||
| View original record | contd :- -2- The actual direct braking we are using is only 6% lower than on 14-EX. We think that to use more direct bracing than on 14-EX gives the foot pedal an unnecessary feeling of sponginess. We… | ||
| Scan028 | Graph comparing the performance of a Super-Sports servo against a standard Phantom servo. | ||
| View original record | Super-Sports Servo Test. V536 Spg. Bal. "A" Spg. Bal. "B" VALUE OF 'B' (LBS.) VALUE OF 'A' (LBS.) STD 'PHANTOM' SERVO. CAR Nº 44 P.K. 55º CAMS. (AVERAGE TORQUE MULTN = 2.08). SUPER SPORTS SERVO.… | ||
| Scan029 | Page with a purple ink stamp from the Print Room. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 11 JAN 1929 DERBY | ||
| Scan030 | Erratic behavior of the 'SS' clutch due to lubrication issues on the sliding ball race. | ||
| View original record | To DA. from Hs/Rm. c. to BY. Hs/Rm7/LG14.1.29. 'SS' CLUTCH. +7300 Although the SS. clutches are now better, they still behave rather erratically. One cause appears to be the difficulty of getting… | ||
| Scan031 | Cover memo for an attached report (PD.36) on the electrical system of a Chrysler car. | ||
| View original record | To R. from EFC. c. RJ. SG. c. E. ORIGINAL EFC4/TIS.1.1.29. CHRYSLER ELECTRICAL SYSTEM X3374 / λ14012. Please find attached copy of report PD.36 on Electrical system of the Chrysler car. EFC. Encl. | ||
| Scan032 | Technical description of a Chrysler electrical system, detailing its components like the generator, battery, and starter motor. | ||
| View original record | PD.36. EFC. Jan. 14th, 1929. CHRYSLER ELECTRICAL SYSTEM The electrical system on this car is of Delco-Remy manufacture, and operates on a six-volt supply, with a single insulated wire circuit; the… | ||
| Scan033 | Description of the coil, distributor, lighting, and current limiter systems. | ||
| View original record | -2- Contd. Coil, contact breaker and Distributor. The distributor and automatic advance mechanism are mounted on the cylinder head; the contact breaker having a three-lobe cam and two compact levers.… | ||
| Scan034 | Experiments with various schemes for 'SS' engine valve rocker lubrication. | ||
| View original record | To R. from Hs/ACL. c. to BJ. SG. c. to Wor. E. c. to DA. BY. ORIGINAL 'SS' VALVE ROCKER LUBRICATION. X7060 X.7090 We have experimented with several schemes for rocker lubrication on the SS. engine and… | ||
| Scan035 | Report page detailing a modification to the oil supply system for SS engines by altering the rocker shaft. | ||
| View original record | contd :- -2- improved the cold oil supply, with causing excessive flow when hot, by putting a small 'flat' over the oil holes on the push rod side of the rocker shaft. This small flat brought the oil… | ||
| Scan036 | Investigation into noisy hydraulic shock absorbers on 20 HP cars. | ||
| View original record | To R. from Hs/Hm. c. to BJ. Wor. c. to Sg. DA. c. to E. EY. c. to Mx. Cy. c. to Hm. HYDRAULIC SHOCK ABSORBER NOISES. The Repair Dept. have had various complaints from customers of noisy shock… | ||
| Scan037 | Investigation into a knocking sound caused by link pin distortion and clearance issues, including test results and attempted remedies. | ||
| View original record | contd :- -2- links are not very easy to make. The pin is ground a perfect fit in the eye, but when the ends of the pin are pressed outward in order to lock it on the links, the central bearing portion… | ||
| Scan038 | Investigation into damper, link, and bearing knocking noises and potential solutions. | ||
| View original record | contd :- -3- When we reduced the side play, the noise from the links was less emphatic but still clearly detectable. We tried slotted and drilled high pressure valves as used in America to cushion the… | ||
| Scan039 | Investigations into noise issues on the 20 HP model, focusing on rear dampers and linkages. | ||
| View original record | contd :- -4- the rear of the 20 HP. on certain cars which act as good 'sound boxes'. These cars have been rather troublesome because, not knowing the exact source of the noise, we only were able to… | ||
| Scan040 | Blueprint detailing experiments on hydraulic damper noise, comparing slotted and drilled valve designs. | ||
| View original record | HYDRAULIC DAMPER NOISE EXPERIMENTS PROJECTED OIL HOLES .036 SECTION ACROSS A A FLATS. DRILLED VALVE .062 SIDE CLEARANCE .015 APPROX - REDUCING THEM TO .003 A A SLOTTED VALVE DRILLED VALVE 18 / 1 / 29 | ||
| Scan041 | Blank page with a purple rectangular ink stamp in the bottom right corner. | ||
| View original record | ROLLS-ROYCE LIMITED PRINT 19 JAN 1929 DE | ||
| Scan042 | Potential improvements to the Phantom carburetter by employing a diffuser type jet. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Sg. c. to Wor. E. c. to DA. BY. ORIGINAL Hs/ACL1/LG21.1.29. PHANTOM CARBURETTER. Y7080 X8080 It has occurred to us that we might effect an improvement in the acceleration,… | ||
| Scan043 | Carburetter improvements, comparing diffuser type jets with plain jets and mentioning the development of an SS expanding carburetter. | ||
| View original record | contd :- -2- The first row of air holes in the diffuser could be placed under the petrol level so as to give an early 'pick up' and a suitable capacity accelerating well incorporated. The mixture… | ||
| Scan044 | 'SS' engine mounting tests and a modification to the body mounting to reduce front end dither. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Sg. c. to Wor. E. c. to DA. BY. Hs/Rm3/LG21.1.29. ORIGINAL 'SS' ENGINE MOUNTING. X7005 X7230 Further tests have confirmed all our previous results on the SS. car. Though we… | ||
| Scan045 | Experiments on vehicle chassis alterations to prevent body yawing and improve handling. | ||
| View original record | contd :- -2- the car was entirely altered and exactly the same effect produced on the driver as a 30% reduction in the rating of the side steering tube springs. It appears to us that it should be… | ||
| Scan046 | Recommendation to prepare a design for a thermostat to be fitted to the 'SS' engine. | ||
| View original record | To R. From Hs. c. to BJ. SG. c. to Wor. E. c. to DA. BY. ORIGINAL Hs7/LG21.1.29. 'SS' ENGINE. X7070 We recommend that a design is got out enabling a thermostat to be fitted to the SS. It would be nice… | ||
| Scan047 | Review of induction system heating and distribution, comparing past experience on the Phantom engine with recent tests on the S.S. engine. | ||
| View original record | To R. from Hs/ACL. c. BJ. SG. E. c. Wor. Da. BY. Hs/ACL1/T21.1.29. S.S.INDUCTION SYSTEM HEATING AND DISTRIBUTION. While reviewing the question of induction sy stem heating for the S.S. engine it is as… | ||
| Scan048 | The development of engine induction and heating systems, comparing water and superheated steam methods for warming up. | ||
| View original record | Hs/ACL1/T21.1.29. -2- Contd. Up to the time that the turbulent head Phantom went on to production we were unable to make any appreciable improvement to the cold distribution of the induction system… | ||
| Scan049 | Heat transference, gas velocity, and engine operation characteristics related to the induction system. | ||
| View original record | Hs/ACL1/T21.1.29 -3- Contd. ----------------- velocity is only very low in the full bore exhaust pipe and no doubt would be practically nil round the circumference of the pipe forming an insulating… | ||
| Scan050 | Engine performance issues related to the induction system and carburetter proximity to the exhaust on the Phantom model. | ||
| View original record | Hs/ACL1/T21.1.29. -4- Contd. On the Phantom with the induction system, carburetter and autovac arranged with such proximity to the exhaust system, the whole system becomes very hot under normal… | ||
| Scan051 | Comparison of engine induction and exhaust systems, discussing hot spots, heating, and distribution. | ||
| View original record | -5- Contd. are subject to less variation in temp. from cold to normal working conditions which results in less variation in the mixture strength. The six port induction system with the overhead slot… | ||
| Scan052 | The efficiency and testing of a Solex twin carburetter system, including a diagram. | ||
| View original record | -6- Contd. A system recommended by the "Solex" carburetter Co. and used in conjunction with a twin Solex carburetter which we tested on the Phantom, proved to be very efficient and simple. (See… | ||
| Scan053 | Methods for accelerating engine warm-up using thermostatic control of jacket water and radiator shutters. | ||
| View original record | -7- Contd. provides good distribution, it would appear to be our immediate problem to find the best means of quickly reaching the normal water temperature. It has been suggested that this could be… | ||
| Scan054 | Proposal to experiment with a new induction system to reduce engine detonation, including a diagram. | ||
| View original record | -8- Contd. This would in some ways appear preferable to the present Phantom hot spot system in which the mixture in the induction pipe receives the most heat when the engine is idling or running at… | ||
| Scan055 | Improved manifolding design scheme with advantages over the present Phantom. | ||
| View original record | -9- Contd. At this stage, where an efficient system is required quickly, it would appear that a scheme something on the above lines would be the quickest solution - subject of course to test - and due… | ||
| Scan056 | The condition and performance of Staybrite steel exhaust snouts after road testing on two cars. | ||
| View original record | To R. from Hs/AJL. c. to BJ. SG. c. to Wor. E. c. to DA. BY. EXHAUST SNOUTS IN STAYBRITE STEEL. X7230 X4111 Two samples of the above have been in use for some considerable time, with the following… | ||
| Scan057 | Report on the central lubrication for the 18-EX car after 10,000 miles. | ||
| View original record | To R. from Hs. c. to E. DA. c. to BY. EP. c. to Wor. SG. Hs2/LG22.1.29. ORIGINAL x7941 x3806 We attach a report on the central lubrication on 18-EX car after 10,000 miles. The points raised by Mr.… | ||
| Scan058 | 10,000-mile report on the central lubrication system and chassis condition for vehicle 18-EX. | ||
| View original record | To: Hs. From: G.W.H. Hôtel de France, Châteauroux, Indre. REPORT ON 18-EX 10,000 MILES CENTRAL LUBRICATION. We have taken off the body and wings to make a thorough examination of the chassis. All… | ||
| Scan059 | Condition and lubrication of various vehicle components in a tabular format. | ||
| View original record | -2- Bijur supplying unit. | Drops per min. | As fitted | Condition of bearings. Foot and hand brake equalizing shaft. N/s) O/s) | 2 | 2 | Well lubricated. Bearing in good condition. Gear bearing | 2 |… | ||
| Scan060 | Typed inspection report, page 3, detailing the condition of various bearings and units. | ||
| View original record | -3- Bijur supplying unit. Drops per min. As fitted Condition of bearings. N/s wheel unit. Top pivot bearing. Well lubricated. Bottom pivot bearing. Roller race in good condition. Plentiful supply of… | ||
| Scan061 | Investigations into joint failures, wear on various components, and rectifications for drip plug lubrication issues. | ||
| View original record | -4- As reported on front axle, we found several joints when disconnected, the solder had cracked but had not leaked oil. It would appear that solder is not strong enough for the joints. We should also… | ||
| Scan062 | Examination report on the condition of dismantled front and rear springs. | ||
| View original record | -5- The front and rear springs have been dismantled and all leaves examined. The front spring leaves were well lubricated and showed very little digging-in at the tips. The rear springs were found to… | ||
| Scan063 | Status update on the 'SS' chassis, detailing test plans and improvements for frame oscillations. | ||
| View original record | To R. from Hs. c. to BJ. Sg. c. to Wor. E. c. to DA. BY. HS2/LG24.1.29. 'SS' CHASSIS. [handwritten: V7941 [crossed out], X7830 [crossed out], X7770] We have now 6 of these completed. 18-EX and 19-EX… | ||
| Scan064 | Progress report on tests concerning the chassis, starter, exhaust system, and shock absorbers. | ||
| View original record | contd :- -2- at different points along the frame. We have not been successful with this in making the chassis bad, we have therefore come to the conclusion that it is the moment of inertia of the… | ||
| Scan065 | Carburetion and cold weather performance of the SS model, comparing it to the Phantom. | ||
| View original record | contd :- -3- that these can be made satisfactory. (5) Carburation. During the present cold weather, we have left cars out all night and started up from cold the next morning. This has confirmed that… | ||
| Scan066 | Issues with the reserve petrol supply system and proposed solutions. | ||
| View original record | To R. from Hs. c. to BJ. SS. c. to Wor. L. c. to DA. EY. 'SS' RESERVE PETROL SUPPLY. Y7460 At the present time, with the vacuum pump, it is very difficult to get the reserve petrol out of the tank… | ||
| Scan067 | Petrol reserve arrangements and a recommendation to remove the feature entirely. | ||
| View original record | contd :- -2- advent of dashboard petrol gauges, to have no reserve device. It may be possible with the vacuum pump to arrange the small reserve in the autovac tank as with the pump we do not draw on… | ||
| Scan068 | The condition of stiffer big end bearings after a seven-hour engine test on an F.XLV.MS.27 engine. | ||
| View original record | To R. from Hs/VH. c. to BJ.✔ SG.✔ c. to Wor.✔ E. c. to RG. BY. ORIGINAL Hs/VH2/LG24.1.29. STIFFER BIG END BEARINGS TO DES.927 / 3859 Engine F.XLV.MS.27. Pistons 5.3/1 comp: ratio. We have completed… | ||
| Scan069 | Laboratory starter rig for observing and investigating gear jamming during engagement. | ||
| View original record | R. from EFC. c. BJ. SG. c. E. Da. c. Wor. By. ORIGINAL SECRET S.S. SEQUENCE STARTER We have now in our laboratory the starter rig for experimental tests, comprising crankcase, crankshaft with… | ||
| Scan070 | Analysis of the cause of jamming between pinion and wheel teeth due to the design of their corners. | ||
| View original record | -2- Contd. The nature of the jam observed was immediately arrived at by noticing the fact that when the jam occurred the leading sharp corners of the pinion teeth were not presented to the following… | ||
| Scan071 | Mechanical jamming issue, proposing solutions like a disengaging radius and backed-off teeth. | ||
| View original record | -3- Contd. It will be remembered that the disengaging radius was provided largely as a means of overcoming the engaging jam which we had observed previously when disengaging edges were sharp. It… | ||
| Scan072 | Continued report page on studying a system weakness related to push button pressure and supply voltage. | ||
| View original record | -4- Contd. upon a second (or third) application of pressure to the push button. We are, however, carefully studying the question of the first weakness in the system as the supply voltage is gradually… | ||
| Scan073 | Comparative analysis of expanding and static type car carburettors to improve performance. | ||
| View original record | To R. from Hs/ACL. c. to BJ. SG. c. to Wor. E. c. to BY. ORIGINAL Hs/ACL1/LG28.1.29. X8080 X3603 CAR CARBURETTERS. At one time and another we have tested out various carburettors on our cars with the… | ||
| Scan074 | List of advantages and disadvantages concerning carburettor operation and performance. | ||
| View original record | contd :- -2- (1) They give good power output due to the low depression at which they operate. The low speed full throttle power is usually good because here the depression is at a minimum. (2) Due to… | ||
| Scan075 | Analysis of static carburettor performance and disadvantages, including a diagram of mixture at small throttle openings. | ||
| View original record | contd :- -3- The disadvantages enumerated above have been quite sufficient to prohibit the use of this type of instrument on our cars. Certainly there have been numerous adjuncts developed to attempt… | ||
| Scan076 | Description of engine stalling due to fuel supply failure during rapid acceleration, comparing car and aero engines. | ||
| View original record | contd :- -4- If now the throttle is opened suddenly from this low speed we have a very different condition. The engine speed will not follow quickly the rapid opening of the throttle due to the… | ||
| Scan077 | Page describing the operation of the Phantom carburetter, focusing on low speed, acceleration, and the function of the automatic air valve, with an accompanying diagram. | ||
| View original record | contd :- -8- vigorously - or keeps pace better with the throttle opening - and a high velocity quickly results in the choke being sufficient to prevent a break down in the fuel supply like in the… | ||
| Scan078 | Page detailing carburetter performance, specifically comparing the Phantom carburetter to static carburetters like the Twin Solex. | ||
| View original record | contd :- -6- that the latter carburetter has an air valve lifted by the engine suction should not appreciably slow down the acceleration of the car providing the damping of this valve is not excessive… | ||
| Scan079 | Overcoming high depression troubles in a carburetter by employing diffuser type jets. | ||
| View original record | contd :- -7- It has occurred to us that we might overcome these high depression troubles with consequently an increase of the power output, and still retain our good low speed and snap opening up… | ||
| Scan080 | Carburetter operation with two illustrative diagrams. | ||
| View original record | contd :- -8- valve reached its maximum lift, the depression in the high speed choke would however vary in exactly the same way as a static carburetter. The depress- ion to operate the piston - which… | ||
| Scan081 | The design and advantages of a static, suction-controlled carburettor. | ||
| View original record | contd :- -9- chance of fuel deposition - could be employed. A butterfly valve operated by the piston would provide the means for obtaining the pressure difference across the slow running unit and… | ||
| Scan082 | Page discussing the benefits of a diffuser type jet and suction valve in a carburetter for potential future protection. | ||
| View original record | contd :- -10- (4) Good atomisation to assist distribution. (5) Economy because with diffuser type jet with accelerating well and suction valve it would not have to be set over rich to give… | ||
| Scan083 | Tests conducted on the 'SS' expanding carburetter, detailing induction pipe depression measurements on a Phantom engine. | ||
| View original record | To R. from Hs/ACL. Hs/ACL2/LG28.1.29. c. to BJ. SG. c. to WoF. E. c. to DA. BY. ORIGINAL X7080 x7070 'SS' EXPANDING CARBURETTER. We have had the opportunity of carrying out some more tests on the… | ||
| Scan084 | Carburettor tests on induction pipe depression related to choke and restrictor area. | ||
| View original record | contd :- -2- withdrawn to 1.4" or giving an area of 1.710 sq.ins. (the same as past the free choke) the depression in the induction pipe is 2.1" Hg. We aim at getting a depression of not more than 2"… | ||
| Scan085 | Page discussing modifications to improve air flow in an intake, involving the choke and float chamber. | ||
| View original record | contd :- -3- in its full lift position all that portion below the narrowest section for air flow which it forms with the choke is cut away. We shall then have a restrictor giving the same choke space… | ||
| Scan086 | Graph plotting induction depressions against the area past the choke for an S.S. carburettor. | ||
| View original record | INDUCTION DEPRESSIONS ON S.S. CARBURETTOR. CARBURETTOR TO L.E.C. 2564. DEPRESSION (INCHES OF MERCURY). AREA PAST CHOKE (RESTRICTOR) IN SQ. INS. DEPn AT CHOKE DEPn AT INDn PIPE 1.575 DIA CHOKE WITH… | ||
| Scan087 | Mostly blank document with a purple 'Print Room' stamp in the bottom right corner. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 28 JAN 1929 DERBY. | ||
| Scan088 | Performance and issues with various headlamp schemes. | ||
| View original record | To R. From Hs. c. to BJ. SG. c. to Wor. E. c. to BY. DA. ORIGINAL HEAD LAMPS. X4535 X4477 We have not had much success with the Lucas Magnetic dipping reflectors. A set of these lamps were fitted to… | ||
| Scan089 | Carburetter freezing issues on 'F' type 'Vee' engines and proposed solutions. | ||
| View original record | To R. from Hs. c. to BJ. SG. c. to WOP. E. c. to RG. BY. ORIGINAL Hs3/LG29.1.29. 'F' ENGINE CARBURETTERS IN THE 'VEE'. V3933 WE expect this week to fit at least one of the service machines with the… | ||
| Scan090 | Blueprint of a plate type fire proof air intake for R.R. F. Carburettors. | ||
| View original record | PLATE TYPE FIRE PROOF AIR INTAKE R.R. F. CARBS. ROLLS-ROYCE LIMITED PRINT ROOM 30 JAN 1929 DERBY | ||
| Scan091 | Need to repeat a type test for a Moderate Supercharged F. Engine due to bearing failure caused by detonation, and the proposed solution of reducing the compression ratio. | ||
| View original record | To R. from Hs. c. to BJ. SG. c. to WoR. E. c. to RG. BY. Hs2/LG29.1.29. ORIGINAL X3859 / X2965 X3996 / X3196 MODERATE S/C. F. ENGINE. The type test on the M. S/C. engine which was recently run is… | ||
| Scan092 | Engine endurance and detonation tests, with proposed modifications for future type testing. | ||
| View original record | contd :- -2- will be adjusted for the 525 HP. We are at present running an Endurance Test on an engine fitted with the 5.5 pistons. The test is being run at full 525 HP., not at 9/10ths. With the… | ||
| Scan093 | Comparative power curves for engine F.XIV-MS-27 with compression ratios of 5.3/1, 5.5/1, and 6/1. | ||
| View original record | COMPARATIVE POWER CURVES WITH COMPRESSION RATIOS 5.3/1, 5.5/1, & 6/1 ENGINE F.XIV - MS - 27 CAMSHAFTS LONG DURATION I.C. 40° A.B.D.C. FUEL 100% BENZOLE SPARKING PLUGS LODGE A40s C/B HP CORRECTED B.H.P… | ||
| Scan094 | Page featuring a purple ink stamp from the Print Room. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 30 JAN 1929 DERBY. | ||
| Scan095 | The testing of 'SS' road springs and a new lubrication scheme. | ||
| View original record | To R. from Hs/Rn. Hs/Rn2/LG1.2.29. c.c. to BJ. SG. c.c. to Wor. E. c.c. to DA. E.Y. c.c. to OY. Hdn. ORIGINAL 'SS' ROAD SPRINGS. 47410 We have run front spring to N.sch.2787 No.3. arrangement for 30… | ||
| Scan096 | Higher output dynamos, their charging rates, and the potential for premature battery deterioration. | ||
| View original record | R. from EFC. c. E. Da. c. SG. CWB. c. PN. Wor. ORIGIN EFC-2/T1.2.29. x8663 x8664 x6060 DYNAMO OUTPUT. The higher output dynamos (20 H.P. and 40/50) as at present arranged give a very considerable… | ||
| Scan097 | Battery overcharging, dynamo output curves, and the potential use of a green lamp charge indicator. | ||
| View original record | -2- Contd. Presumably owing to better batteries we have not latterly had so many complaints of overcharging with the undesirable effect that would result therefrom, and we can say that there appears… | ||
| Scan098 | Experiments with higher output dynamos and green lamp schemes on various car chassis. | ||
| View original record | -3- Contd. to be necessary for the case considered above. We have running on 12-G4 a higher output dynamo in conjunction with the green lamp scheme (separate unit). This has run 5150 miles up to the… | ||
| Scan099 | Anxiety from the Sales department regarding dynamo output and exploring potential improvements. | ||
| View original record | To R. from EFC. c. SG. CWB. c. Cx. PN. c. Wor. E. ORIGINAL EFC1/T5.2.29. x8664 x77660 DYNAMO OUTPUT. Further to our EFC2/T1.2.29, there appears to be some anxiety on the part of Sales in regard to the… | ||
| Scan100 | Machine output by adding weight, and the justification for including a green lamp indicator in the chassis electrical system. | ||
| View original record | Contd. -2- EFC1/T5.2.29. output with the same cutting in. For instance, it is estimated that in the extreme cases, with an additional 9 lbs. on the machine, making the weight 40 lbs., we could produce… | ||
| Scan101 | General performance report on the Solex double choke carburetter fitted to a 12-EX chassis. | ||
| View original record | Hs/AJL/LG7.2.29. SOLEX CARBURETTER ON 12-EX. General Performance. The Solex double choke carburetter as fitted to 12-EX is the best static carburetter we have tested out on either of our chassis. The… | ||
| Scan102 | Performance comparison report between a standard carburetter and a Solex carburetter, detailing acceleration and hill climb test results. | ||
| View original record | contd :- -2- Either our carburetter uses an excessive amount of petrol during accelerations, or the Solex carb. is excessively strong at medium throttle positions. Starting from cold is very good,… | ||
| Scan103 | Performance data from hill climb tests comparing R.R. and Solex carburettor configurations. | ||
| View original record | -2a- (b) Ticknall Hill. R.R. Solex. Cutout closed. Cutout open. Cutout closed. Cutout open. --------------------------------------------------------------------- Start - 10 m.p.h. 10 m.p.h. 10 m.p.h.… | ||
| Scan104 | Comparison of petrol consumption between a standard (R.R.) and a Solex carburettor at various speeds. | ||
| View original record | contd :- -3- Petrol consumption tests. A series of comparative petrol consumption tests were made at 10, 20, 30 and 40 m.p.h. with the following results : SPEED. M.P.H. R.R. M.P.G. Solex. M.P.G. 10 16… | ||
| Scan105 | Graph comparing the acceleration of a Phantom (12EX) with Solex and RR carburettors. | ||
| View original record | CAR SPEED (M.P.H.) TIME (SEC) PHANTOM ACCELERATION (12EX) SOLEX AND RR CARBURETTER SOLEX RR 5-2-29 | ||
| Scan106 | The reverse of a document showing a company date stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED 7 FEB 1929 | ||
| Scan107 | Graph comparing the B.M.E.P. of a Phantom engine using a Solex twin carburetter versus the standard carburetter. | ||
| View original record | SOLEX TWIN CARBURETTER ON PHANTOM ENGINE B.M.E.P. WITH 34 M.M. AND 32 M.M. CHOKES. COMPARED WITH STD. PHANTOM CARBURETTER. 34 M.M. CHOKE GIVES 1.055□" FREE AREA. 32 M.M. CHOKE GIVES .893□" FREE AREA.… | ||
| Scan108 | Blueprint diagram for a Solex Diffuser Tube with dimensions. | ||
| View original record | [ "SOLEX DIFFUSER TUBE", ".287 DIA", ".218 DIA", "4 HOLES .039 DIA", "4 HOLES .050 DIA", "2 HOLES .050 DIA", "2 HOLES .050 DIA", ".115 DIA.", "1.550", ".700", ".300", ".750" ], | ||
| Scan109 | Sectional diagram of a Solex twin choke carburetter tested on a Standard Phantom. | ||
| View original record | 50 M.M. DIA. AN IDLING MIXTURE DISCHARGE HOLE IS PROVIDED AT EACH SIDE OF THE THROTTLE. THEY ARE CONNECTED BY MEANS OF AN ANNULAR PASSAGE. IDLING FUEL JET ADJUSTING SCREW FOR IDLING AIR SUPPLY (AIR… | ||
| Scan110 | Graph comparing power curves of two Solex carburetter choke sizes against the standard Phantom carburetter. | ||
| View original record | POWER CURVES WITH SOLEX TWIN CARBURETTER ON PHANTOM. ONE CHOKE SUPPLIES THREE CYLINDERS 34 M/M CHOKE GIVES 1.055 口'' FREE AREA. 32 M/M '' '' .893 口'' '' B.H.P. ENG. R.P.M. SOLEX 34 M.M. CHOKES SOLEX… | ||
| Scan111 | Blank page with a date stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED 7 FEB. 1929 | ||
| Scan112 | Successful trial of a Solex carburetter for the Phantom model. | ||
| View original record | To R. from Hs. c. to SG. Wor. c. to E. RA. c. to BY. Hs2/LCT.2.29. ORIGINAL SOLEX CARBURETTER. X3603 Some time ago you suggested we might get in touch with the Solex carburetter people to supply a… | ||
| Scan113 | Tests conducted on a twin choke Solex carburetter fitted to a Phantom model, both on the test bed and on the road. | ||
| View original record | To R. from Hs/ACL. c. to SG. Wor. c. to E. DA. c. to BY. SOLEX CARBURETTER TESTS ON PHANTOM. We have carried out some tests with a twin choke Solex carburetter fitted to a standard Phantom both on the… | ||
| Scan114 | Test bed runs comparing the performance of Solex carburetors against the standard Phantom carburetor, focusing on B.M.E.P. gains. | ||
| View original record | contd :- -2- horizontal distributing pipe (see appended print). Runs were made on the test bed with various chokes and diffusers and the power and B.M.E.P. obtained are shewn on appended prints… | ||
| Scan115 | Carburettor choke sizes and their effect on low-speed performance and driveability. | ||
| View original record | contd :- -3- When the carburetter was fitted to a chassis it was found necessary to remove the 34 mm. choke, due to the poor pick up from slow speeds, and replace it with the 32 mm. choke. This… | ||
| Scan116 | Page discussing engine induction systems, carburettor configurations, and fuel distribution improvements across various engine models. | ||
| View original record | contd :- -4- but we have not had exeprience with this on our cars and cannot say we like such a scheme. Very good distribution resulted with the induction system used and we have noticed that good… | ||
| Scan117 | Carburettor development, comparing single versus double carburettors, and suggesting tests for improved low speed torque. | ||
| View original record | contd :- -5- working at a low induction depression and so obtaining such a marked gain in low speed torque. We certainly do not care for double carburetters from the point of view of extra… | ||
| Scan118 | Recommending the standardisation of Morganite Grade EG2 brushes for Phantom and S.S. Dynamos following a 10,000-mile test. | ||
| View original record | To R. from EFC. c. SG. E. c. Da. Wor. c. By. ORIGINAL MORGANITE GRADE EG2 BRUSHES FOR PHANTOM AND S.S. DYNAMOS We have run these brushes experimentally for some considerable time with general… | ||
| Scan119 | Test report on the 10,000-mile performance of Morganite EG2 brushes on a dynamo. | ||
| View original record | PB.37 EFC. COPY. Contd. 10,000 MILES TEST OF MORGANITE EG2 BRUSHES. On 13.4.28, a set of the above brushes was fitted to dynamo I set to half way between the upper limit of standard output and the… | ||
| Scan120 | Trials on a pinion for a sequence starter, observing jamming faults and comparing it to a Bosch design. | ||
| View original record | To R. from EFC. c. SG. E. c. Wor. By. ORIGINAL EFC2/T7.2.29. SS. SEQUENCE STARTER. X7625 X4562 We will arrange to make a trial of a pinion with all corners rounded. We have, however, considerable hope… | ||
| Scan121 | Development of slackness in the R.R. pinion and its splines, comparing it with a Bosch design. | ||
| View original record | EFC2/T7.2.29. -2- Contd. A point which is now causing us some concern is the development of slackness between the R.R. pinion and its splines. We find that unless these are an exceptionally good fit… | ||
| Scan122 | Blueprint of an induction system for a Phantom, used for Solex carburetter experiments. | ||
| View original record | [ "INDUCTION SYSTEM ON PHANTOM USED FOR", ""SOLEX" CARBURETTER EXPTS.", "HOT SPOT", "1.575 DIA.", ".787 DIA", "CARBURETTER FLANGE.", "7 FEB 1928" ], | ||
| Scan123 | Comparison blueprint of different types of trunnion bearings. | ||
| View original record | INDIA. SS. AMERICAN TYPE STANDARD TYPE_G53671 STIFFENED TYPE_G53671 STANDARD TYPE_G76832 STIFFENED TYPE_Ex3788 COMPARISON of TRUNNION BEARINGS RB 8-2-28 | ||
| Scan124 | Investigation into radiator movement issues on the 'SS' model. | ||
| View original record | To R. from Hs/Rm. c.c. to Sg. Wor. c.c. to E. DA. c.c. to BY. ORIGINAL Hs/RmL/LG8.2.29. X7250 x 7005 RADIATOR MOVEMENT 'SS'. We have refrained from report piecemeal on our tests on this complaint… | ||
| Scan125 | Tests on radiator movement and engine roughness under various body, subframe, and engine mounting conditions. | ||
| View original record | contd :- -2- exactly over the line of the front subframe brackets and to each end hung a mass of lead equivalent to 200 lbs., or more than the front weight of the body. On the rear we had a test kit… | ||
| Scan126 | Page 3 of a report detailing modifications and test results for body mounting and frame damping. | ||
| View original record | contd :- -3- (7) Our next modification was to single point mount the body in front, prevent it swaying by having light rubber control under the front subframe feet, and connecting the scuttle to the… | ||
| Scan127 | Test report in table format detailing the results of 'SS' radiator movement under different engine and body mounting conditions. | ||
| View original record | 'SS' RADIATOR MOVEMENT. | Engine Mounting. | Type of body or ballast. | Body mounting or ballast distribution. | Condition of cross. | % Radiator movement 18-EX 10,000 miles - condition taken as 100%… | ||
| Scan128 | Secret test report on Hypoid gears and propeller shaft joints for the 'SS' chassis. | ||
| View original record | To R. from Hs. c. to Sg. Wor. c. to E. DA. c. to BY. Hs3/LGS.2.29. ORIGINAL X2066 X7771 'SS' - S E C R E T. We have carried out several tests on two 'SS' chassis on the road wheel dynamometer. The… | ||
| Scan129 | The investigation of faults with joints and the testing of the gearbox and vacuum pump. | ||
| View original record | contd :- -2- of oil in it. We also had a similar case with the chassis on the road. On investigation of these joints we found one definite fault, i.e., the eyelet of the joint distorts when the nuts… | ||
| Scan130 | Power curves comparing the SS and Phantom models, and an update on a new rear wheel carrier. | ||
| View original record | contd :- -3- We attach a chart giving power curves of the SS. compared with the average Phantom. These are the usual dynamometer figures which are taken. With the cutout open we obtain 104 HP. at 2230… | ||
| Scan131 | Graph plotting Horse Power at the Road Wheels against Engine RPM for the Standard Phantom and S.S. Chassis models. | ||
| View original record | B.H.P. AT ROAD WHEELS 3RD GEAR CUT OUT OPEN 2000 R.P.M AV: PHANTOM 90.7 B.H.P. MIN: PHANTOM 86.1 B.H.P. S.S. CHASSIS 98 B.H.P. HORSE POWER AT ROAD WHEELS STANDARD PHANTOM AND S.S. CUT OUT CLOSED… | ||
| Scan132 | Blank document page with a purple date stamp. | ||
| View original record | ROLLS-ROYCE LIMITED 8 FEB 1929 | ||
| Scan133 | Test results for the 'SS' model's cold start performance compared to the Phantom, resulting in a modification to the engine heating system. | ||
| View original record | To R. from Hs. c. to Sg. Wor. c. to E. DA. c. to BY. ORIGINAL. Hs5/LGS. 2. 29. 'SS' - S E C R E T. X7770 X7250 We have carried out tests by leaving the SS. cars out all night in 10° to 15° of frost… | ||
| Scan134 | Laboratory trials for an S.S. Sequence Starter, detailing tests on pinion engagement and jamming issues. | ||
| View original record | To R. from EFC. c. SG. E. c. Da. Hy. c. Wor. CRITICAL EFC2/T15.3.29. S.S. SEQUENCE STARTER X7655 Further to our EFC2/T26.1.29 referring to the trials of S.S. starter engagement in our laboratory,… | ||
| Scan135 | Experiments to fix motor engagement issues by testing additional torque, current, and different spring arrangements. | ||
| View original record | -2- Contd. to determine whether it was a question of additional armature torque we made the experiment of feeding in additional current at the main motor terminal at times when corner jams occurred,… | ||
| Scan136 | Improvements and proposed modifications to a pinion mechanism, including test results and suggestions for new motors. | ||
| View original record | EFC2/T15.2.29. -3- Contd. With this pinion we made a still further improvement in the frequency of operation without failure, by packing back the pinion approx. .080" against its spring by means of a… | ||
| Scan137 | Brief internal memorandum requesting remarks before escalating a matter to the D.O. | ||
| View original record | Contd. -4- EFC2/T15.2.29. Before putting this matter up to the D.O. we should be pleased to have your remarks. EFC. | ||
| Scan138 | Cover letter for the final report on the 18-EX car after a 10,000-mile test in France. | ||
| View original record | To R. from Hs. c. to Sg. Wor. c. to E. DA. c. to BY. EP. ORIGINAL Hs2/LG19. 2. 29. REPORT ON 18-EX CAR AFTER 10,000 miles /7941 TEST IN FRANCE. We attach herewith final report on the above car after… | ||
| Scan139 | 18-EX car after a 10,000 miles test in France, detailing engine performance and component conditions. | ||
| View original record | REPORT ON 18-EX CAR AFTER 10,000 MILES TEST IN FRANCE. Engine 'SS' No.7. The performance of the engine remained good throughout the test. It improved with the running in regard to periods. At the… | ||
| Scan140 | Condition and issues of various engine components following a 5000-mile test. | ||
| View original record | contd :- -2- Engine gears. These remained as reported at 5000 miles. Vacuum pump to LOP.E77660. This continued to function as reported at 5000 miles. No other troubles developed. Inlet pipe to LOP.… | ||
| Scan141 | Continued test report page detailing the condition of a radiator, shutters, bonnet, oil pump, fan, axle, brakes, and springs. | ||
| View original record | contd :- -3- Radiator to LOP. E.77675 N.S. 2727/2683/2696 E.CH.1048. The dia. of the suspension studs increased from .25 to .3125. No further trouble was experienced with the radiator as previously… | ||
| Scan142 | Test report page detailing the performance and condition of various vehicle components including axles, steering, clutch, and brakes. | ||
| View original record | contd :- -4- Front Axle Control Dampers to IOP. E.79507. N.S.2635. Anchorage for front axle control dampers to IOP.F.79517.N.S.2663. The second set of dampers fitted gave no trouble. Loading remained… | ||
| Scan143 | The post-test condition of various vehicle components, including brakes, dampers, petrol tank, and subframe. | ||
| View original record | contd :- -5- but weather conditions were against it. The scheme however gave promise of getting over the trouble. The brake drums were in good condition when examined. A separate report dealt fully… | ||
| Scan144 | Test report summary on the performance of the bodywork, windows, and semi-isolation scheme. | ||
| View original record | contd :- -6- The bodywork stood up remarkably well throughout the test. The windows got very hard to wind owing to damp swelling the felt packing of the glass window guides. Very few rattles… | ||
| Scan145 | Investigating bearing failures on 'F' engines, attributing the cause to faulty oil supply installation. | ||
| View original record | To R. from Hs. c. to SG. Wor. c. to RG. R. c. to BY. FL ORIGINAL FAILURE OF BEARINGS ON 'F' ENGINES. X3865 X3843 We have received at the Works the rest of the engines from the 'Fox' machines. These… | ||
| Scan146 | F. engine installation issues, comparing service machines to an experimental machine. | ||
| View original record | -2- contd :- 'Fox' machines which has been flying with an F. engine for 18 months. On the experimental machine the oil filter is submerged in the tank and there are only two connections on the suction… | ||
| Scan147 | Experiments with 'SS' engine feet fitted to a 20-EX experimental car. | ||
| View original record | To R. from Hs. c. to SE. Wor. c. to E. DA. c. to BY. ORIGINAL HS3/LG19.2.29. 'SS' ENGINE FEET. 47005 We have fitted to 20-EX car - (this car has mostly been used for experiments on engine feet) the… | ||
| Scan148 | Trials on the 'SS' Sequence Starter, concerning the effect of voltage on corner jamming failures. | ||
| View original record | To R. from EFC. c. to Sg! E. c. to DA. BY.✓ c. to Wor.✓ ORIGINAL EFC6/LG19.2.29. 'SS' SEQUENCE STARTER. x7625/55 We have further confirmed by careful trial that the frequency of failure through corner… | ||
| Scan149 | Standardisation of wheel rim sizes for 'SS' cars, comparing 20' and 21' options. | ||
| View original record | To H. from Hs. c. to Sg. Wot. c. to E. DA. c. to BY. ORIGINAL Hs1/LG20.2.29. X78-10 X.527 WHEELS FOR 'SS' CARS. 18-EX car is running in France fitted with wheels with 20" rims, 19-EX car is running… | ||
| Scan150 | Proposed improvements and ongoing tests for the 21-EX car, focusing on engine feet, frame twisting, and exhaust noise. | ||
| View original record | To R. from Hs. c. to Sg. Wor. c. to E. DA. c. to BY. ORIGINAL Hs1/LG27.2.29. 21-EX CAR. *7941a / *7770 *7005 The above car is the next car we are proposing to send to France. It is running on the… | ||
| Scan151 | Engine and exhaust noise issues and arrangements for the 21-EX car. | ||
| View original record | contd :- -2- when running at all speeds including small throttle openings which does not exist on the present Phantoms. Previously all this noise has been attributed to exhaust noise, and we are still… | ||
| Scan152 | Listing parts to be fitted to the 21-EX Car chassis before testing. | ||
| View original record | COPY. To HPS. from RHC. c. to FW. JHC. c. to TJ. WY. RHC2/BE20.2.29. 21-EX CAR. We give below the parts which we expect will be fitted to the chassis before it is placed on test. We also shew a list… | ||
| Scan153 | Numbered list of vehicle modifications and features, continued from a previous page. | ||
| View original record | contd :- -2- 19. Air vessel on front axle pivots. 20. Increased capacity of vacuum pump LeC.2631. 21. Improved Dynamo Drive. LeC.2631. 22. Steering column and controls. 23. Improved Bijur oil pump.… | ||
| Scan154 | The results of comparative life tests on switchbox and cut-out contacts. | ||
| View original record | To R. from EFC. c. to Sg. E. BY. WOR. PN. ORIGINAL EFC1/B28.2.29. SWITCHBOX AND CUT-OUT CONTACT LIFE TESTS. X8730 / X8740 We have now completed a satisfactory series of four comparative tests of… | ||
| Scan155 | Life tests conducted on a 20 HP switchbox. | ||
| View original record | February 23rd, 1929. X5730. A.D.28. SWITCHBOX LIFE TESTS. A 20 h.p. switchbox has now been tested out for contact life under each of the four arrangements described in report A.D.8. The switchbox was… | ||
| Scan156 | Test report detailing the failure analysis of electrical cut-out points under different breaking conditions. | ||
| View original record | Contd. -2- (2) Armature break first. Failed after 16843 operations. No spark at cut-out on opening. Points not badly burnt. Small groove burnt in under-side of blade. Also slight groove in top side.… | ||
| Scan157 | Continuation page of a report detailing tests on switch contacts. | ||
| View original record | Contd. -3- good deal for small variations in setting up the switch afresh for each test. Contacts tested herewith. F.J.A. | ||
| Scan158 | Laboratory test report on a sequence starter motor and its associated switches and components. | ||
| View original record | To R. from EFC. c.c. to Sg. Wor. c.c. to BY. E. ORIGINAL EFC1/LG2. 3.29. 2. SEQUENCE STARTER MOTOR AND SWITCHES. X76252 / X7655 We received for laboratory test a sequence starter motor incorporating -… | ||
| Scan159 | Electrical and operational tests on a starter motor, its armature, and teazer circuit. | ||
| View original record | contd :- -2- the only appreciable noise in each [illegible] direction being the slight click when in each case the armature takes up a solid connection to the piston. (3) An electrical operation test.… | ||
| Scan160 | Grinding down a parallel armature for a trial with a LeC. damper. | ||
| View original record | contd :- -3- this first parallel armature has been ground down to 3.100/3.000. The copper has only just been touched, and the insulation is still O.K. We have some taper bore pole pieces and therefore… | ||
| Scan161 | The development and faults of a sequence starter motor and its switches. | ||
| View original record | To R. From EPC. c. to Sg. Wor. c. to BY. E. ORIGINAL EPC4/LG6.3.29. SEQUENCE STARTER MOTOR AND SWITCHES. Y7625/3v Further to our EPC1/LG2.3.29. The taper armature (the 3.100 parallel armature ground… | ||
| Scan162 | Analysis of noise issues related to gear engagement, disengagement, and damper performance. | ||
| View original record | contd :- -2- rarely noted on a second push. A little noise results from a corner jam but can be minimised by reducing [unclear] set of pinion spring. (2) Some small noise results when entering into… | ||
| Scan163 | Modifications to a motor arrangement to address gear noise and pinion engagement. | ||
| View original record | contd :- -3- We have found a clearance equal to the damper travel viz: .175" to be suitable which leaves a travel of the armature relative to the damper of .525" in the present motor. The pinion width… | ||
| Scan164 | Modifications and tests on electrical motor components and switches. | ||
| View original record | contd :- -4- 8. Main armature spring D.71569 with .125" packing to give a spring + packing set up length of 3.700" and force of 5.05 lbw. 9. Pinion clearance from wheels in disengaged position to be… | ||
| Scan165 | Failures and modifications for the '33' rear axle. | ||
| View original record | To R. from Hs. c. to SS. Wor. c. to E. DA. c. to BY. ORIGINAL. HS4/LG4.3.29. '33' REAR AXLE. X7350 We have had failures with the aluminium portion of the '33' rear axle. In some cases the failure has… | ||
| Scan166 | Recommendations for a sequence starter motor with damper, based on experiments on the 10,000 miles chassis 21-EX. | ||
| View original record | To BY. from EPC. c. to BY/RD. c. to RHC. ORIGINAL EFC3/LG6.3.29. SEQUENCE STARTER MOTOR WITH DAMPER. V7625/EF The combination of items which we recommend as a result of our experiments, for… | ||
| Scan167 | Page 2 of a technical note detailing specifications for an armature spring and pinion clearance, with proposals for future bench tests. | ||
| View original record | contd :- -2- (9) Main armature spring D.71569 with .125" packing to give set up length of 3.700" and force of 5.05 lbw. (10) Pinion clearance from wheel in disengaged position to be .175" i.e., equal… | ||
| Scan168 | Two cars being prepared for travel to Le Canadel, France, to discuss new features. | ||
| View original record | To R. from Hs. c. to Sg. Wor. c. to E. DA. c. to BY. ----------------------- Hsl/LCS.5.29. ----------------------- ORIGINAL *SS* CHASSIS. 47005 We expect to have both cars referred to in the attached… | ||
| Scan169 | Modifications and test results for a sequence starter motor. | ||
| View original record | To R. from EFC. c.c. to Sg. Wor. c.c. to BY. E. ORIGINAL EFC1/LGB.3.29. X 7625 X 7655 SEQUENCE STARTER MOTOR. Further again to our EFC4/LG6.3.29. fault (2) has been somewhat reduced without loss of… | ||
| Scan170 | The dubious prospects of a new two-way press button switch, contrasting it with the satisfactory performance of the old switches. | ||
| View original record | contd :- -2- We are dubious about the prospects of satisfactory operation of the new two-way press button switch. We hope to have another one of these (with improvements) for trial shortly. The old… | ||
| Scan171 | Experimental 'SS' engine mountings, detailing tests with different rubber feet and packing to reduce movement. | ||
| View original record | To R. from Hs/Sp. c. to Sg. Wor. c. to M. DA. c. to BY. Hs/Rm2/LG8;3.29. 'SS' ENGINE MOUNTING. We have had E. and DA: at the Works for the past week and have been concentrating on engine mountings. It… | ||
| Scan172 | Test report on methods to reduce radiator movement and improve ride quality on poor road surfaces. | ||
| View original record | contd :- -2- We therefore replaced these original feet. Over our test road they were certainly better than the last stage of the LeC. foot but we did not feel that the car would be acceptable with the… | ||
| Scan173 | Tests removing a frame cross member and comparing 20' and 21' wheels. | ||
| View original record | contd :- -3- We carried out further tests removing the cross from the frame and found that with any engine mounting this at once greatly reduced the radiator movement. Without the cross it would… | ||
| Scan174 | Recommendations for the 'S.S.' motor with damper, including adjustments to armature travel and gear specifications. | ||
| View original record | To BY. from EFC. c. to BY/RD. c. to RHC. ORIGINAL EFC1/LG9.3.29. 'S.S.' MOTOR WITH DAMPER. X7625 Further to our EFC3/LG6.3.29., for further motors we recommend the total armature travel be increased… | ||
| Scan175 | Continued list of specifications for various component parts and settings. | ||
| View original record | -2- Contd. with .012 final air gap and .175 distance short of full armature pole piece register when in fully engaged position. (4) 18 S.W.G. teazer winding of 36 turns. (5) Damper to LeC. design… | ||
| Scan176 | The development and supply of a two-way press button starter switch. | ||
| View original record | F. from FFC. c. SG. HY. FFC./T14.3.29. S.S. TWO WAY PRESS BUTTON STARTER SWITCH. X7655 F3/M13.3.29. We have put in hand a switch which we hope will be ready to be sent to R. by the car going to… | ||
| Scan177 | Approved particulars and experimental results for a sequence starter motor, including armature stroke and forces. | ||
| View original record | R. from EFC. c. SG. Wor. c. BY. E. ORIGINAL EFC1/T20.3.29. SEQUENCE STARTER MOTOR. X7621 A schedule of all latest approved particulars of sequence starter motor as fitted to chassis 21-EX and 22-EX… | ||
| Scan178 | The operation of main and auxiliary switches to minimize sparking at the copper contacts. | ||
| View original record | -2- Contd. Referring to the main and auxiliary switch, it has been found advantageous to arrange that the main switch arm picks up the relay switch arm earlier in its travel than called for by… | ||
| Scan179 | Phantom road spring lubrication to address suspension complaints. | ||
| View original record | ORIGINAL To R. from Hs/Rn. c. to Sg. Wor. c. to E. DA. c. to Hn. BY. c. to OY. Hs/Rm7/LG26.3.29. PHANTOM ROAD SPRING LUBRICATION. X7410 X7980 In the Repair Dept. list of complaints, those concerning… | ||
| Scan180 | Investigation into a modification of rear dampers on 'S.S.' cars sent to France. | ||
| View original record | To R. from Hs. c. to Sg. Wo r. c. to E. DA. c. to BY. 'SS' REAR DAMPERS. X7520 We have investigated the reason why the S.S. cars left for France with the holes drilled in the high pressure valves.… | ||
| Scan181 | Proposal for an experimental comparison between parallel and slightly spiral teeth, following the development of a longitudinal damper. | ||
| View original record | R. from EFC. SG. Wor. E. By. ORIGINAL FC2/T22.3.29. SEQUENCE STARTER. X625 Further to our EFCL/T20.3.29, it was our intention therein to refer to the question of parallel teeth versus slightly spiral… | ||
| Scan182 | Identifying the cause of excessive engine cooling water loss on S.S. Chassis and recommending a solution. | ||
| View original record | To R. from Hs/AJL. ORIGINAL His/ AJL1/LG17.4.29. c. to SG. Wor. c. to E. DA. c. to BY. S.S. CHASSIS. X7250 LOSS OF ENGINE COOLING WATER. Reports have been received from France of excessive loss of… | ||
| Scan183 | Page 2 of a memo regarding the 20 HP radiator pipe design, correct water levels, and overflow pipe modifications. | ||
| View original record | contd :- -2- to the 20 HP. radiator. viz: in two parts. One part soldered into the top tank, the second bolted to a boss on the rear outside of the top tank and clipped to the radiator side plates.… | ||
| Scan184 | Diagram illustrating the present and correct positions for S.S. Radiator Overflow Pipes, showing water levels at different temperatures. | ||
| View original record | S.S. RADIATOR OVERFLOW PIPES. CORRECT POSITION PRESENT POSITION. 3" 1/4" A B C D A.B:- WATER LEVEL AT 80°C. C.D:- EQUIVALENT LEVEL AT 15°C AHF 14.4.20 | ||
| Scan185 | Page with a purple ink stamp from the print room. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM 17 APR 1929 DERBY | ||
| Scan186 | Tabular analysis of brake linkage efficiency for direct pedal and servo-assisted systems. | ||
| View original record | EFFICIENCY OF BRAKE LINKAGE SS ① DIRECT PEDAL LINKAGE FROM PEDAL TO REAR BRAKE COUNTERSHAFT LBS/FT TORQUE AT ONE CAMSHAFT FOR PEDAL LOAD P = 1/2 [ (16.65 x 1.375 x 2.00 x 1.875 x 2.85 x 3.750 x 4) /… | ||
| Scan187 | Choice of oil for the Bijur lubrication system based on tests of various brands. | ||
| View original record | To R. From Hs/Gy. c. to SG. Wor. c. to E. DA. c. to BY. ORIGINAL Hs/Gy1/LG19.4.29. X3806 X7980 CHOICE OF OIL FOR THE BIJUR LUBRICATION SYSTEM. We have carried out a number of tests on various oils to… | ||
| Scan188 | Internal document detailing the testing and recommendation of various lubricating oils, including castor-based and mineral oils. | ||
| View original record | contd :- -2- To accomplish this it is essential that the oil be as thick as possible, consistent with other qualities, as otherwise the heat of the engine and warm weather will be responsible for high… | ||
| Scan189 | List of five required properties for an oil to be used in a central lubrication system. | ||
| View original record | contd :- -3- pipe lines, by a straight mineral oil, such as Mobiloil, to prevent corrosion. This mineral oil can then be used until the pump requires filling again, when the car is next used. Summing… | ||
| Scan190 | Comparison table of the viscosity and performance of various oils at different low temperatures. | ||
| View original record | -4- COMPARISON OF VISCOSITY OF VARIOUS OILS AT LOW TEMPERATURES. TEMPERATURES. REMARKS. At 13°F (Castrol R. ) Still quite mobile. ) A good oil for this ) purpose. (Motorine C. 35 ) Too thin for… | ||
| Scan191 | Report outlining the history and testing of the braking system on S.S. cars. | ||
| View original record | To R. From Hs/Rm c. to Sg. Wor. c. to E. DA. c. to BY. ORIGINAL 'SS' BRAKES. X7420 47370 We have been making continuous tests with the braking system on S.S. cars and consider it is desirable to… | ||
| Scan192 | Report investigating brake performance issues, specifically focusing on servo efficiency and temperature effects. | ||
| View original record | contd :- -2- a persisting feeling of sponginess. (3) The front brakes appeared to be doing far too much work as they started to squeak on all cars. (a) Investigation of (1) shewed it to be due to the… | ||
| Scan193 | Analysis of brake linkage efficiency, discussing issues and proposed improvements using woven cotton discs. | ||
| View original record | contd :- -3- (c) We carried out tests to establish the efficiency of the linkage. We attach a chart showing the results obtained. The torque at the camshaft was measured by a lever fitting over the… | ||
| Scan194 | Improvements and changes to the braking system, including the rear brake equalising shaft and servo lining selection. | ||
| View original record | contd :- -4- Improving the rear brake equalising shaft has also improved (2). (3) To overcome (3) we are reverting to the original direct rear braking and may find it necessary to reduce the leverage… | ||
| Scan195 | The performance of a new type of Bijur pump. | ||
| View original record | To R. from Hs/Gy. c.c. to Sz. Wor. c.c. to E. DA. c.c. to BY. Hs/Gy3/LG19.4.29. ORIGINAL REPORT ON BIJUR PUMP. N.SCH.2830 X3806 X.7950 The new type Bijur pump according to fig.1. N.sch.2830 and using… | ||
| Scan196 | Diagnosing issues with an oil and vacuum system, including pedal operation and air expulsion. | ||
| View original record | contd :- -2- back very much more quickly and with noise. In any case after one charge there is no reason to suppose the valve will open again as the vacuum beneath it is destroyed. That one charge of… | ||
| Scan197 | Concluding remarks on a pump design, deeming it satisfactory for the central lubrication on the S.S. and 20 HP models. | ||
| View original record | contd :- -3- We should say that this pump is altogether neater than Bijur's own, and satisfactory for the present design of the central lubrication on the S.S. and 20 HP. Hs/P.Gaye. | ||
| Scan198 | Optimal wiring arrangement for accessory apparatus, particularly concerning the ammeter and fuse board. | ||
| View original record | To R. from EFC. c. E. SG. c. PN. Da. c. Wor. By. c. Da/Ev. ORIGINAL WIRING OF ACCESSORY APPARATUS. There has been some amount of discussion, and possibly slight difference of opinion, concerning the… | ||
| Scan199 | The wiring arrangement for the ammeter, distribution board, and accessory circuits. | ||
| View original record | Contd. -2- that they should be supplied not through such a fuse. We already have it that the starter relay current does not pass through the ammeter (it only passes through the main battery fuse) and… | ||
| Scan200 | Continued discussion on vehicle electrical distribution, fuses, and conductor sizes. | ||
| View original record | EFC2/T22.4.29. -3- Contd. -------------------------------------------------------------------------------- supplied through any other fuse on the main distribution board except the main battery fuse,… | ||
| Scan201 | Proposals on conductor-to-fuse ratios and wiring configurations for the accessory distribution board. | ||
| View original record | -4- Contd. we have the 20 to 1 rule for the proportion of the cross section of the conductor to the fuse, that calls for a conductor of 53/36's, so long as a lighter fuse is not put anywhere in the… | ||
| Scan202 | Problems with a new two-way press button switch and recommending the adoption of an earlier model. | ||
| View original record | R. from EFC. c. SG. E. c. Hy. Wor. S.S. PUSH BUTTON SWITCH. The new two-way press button switch has given trouble in one or two instances and cannot be considered satisfactory without modification. We… | ||
| Scan203 | Method from 'Electrical Review' for reducing sparking and wear of regulator contacts. | ||
| View original record | To R. from EFC. c. SG. PN. EFC3/T25.4.29. X1402 Attached is a page from the 'Electrical Review' of April 12th, giving a method of reducing sparking and wear of regulator contacts, which contacts, as… | ||
| Scan204 | Steering and suspension tests, including damper settings and ride quality observations. | ||
| View original record | Hs. from GWH. Rn. COPY. Hotel de France, Chateauroux, Indre. 25.4.29. STEERING. Tests with 2 1/4° and 3 1/4° lean of pivots - we do not find any appreciable difference between 3 1/4° and 2 1/4° lean… | ||
| Scan205 | Steering and tyre performance tests conducted in France. | ||
| View original record | To Hs. and Rn. from G.W.H. C O P Y. Hotel de France, Chateauroux, Indre, France. STEERING TEST UNDER THE FOLLOWING CONDITIONS Rear dampers 100 lbs. L. and 100 lbs. H.F. Front dampers 80 lbs. L. and 80… | ||
| Scan206 | Adjustments to shock dampers and steering to improve car riding quality. | ||
| View original record | contd :- -2- and no dampers is that the car is riding at times hard and produces small shocks throughout the car, certainly felt more in the front seats than in the rear. With tyres that are worn… | ||
| Scan207 | Tests conducted to resolve oil leakage issues in propeller shaft universal joints. | ||
| View original record | To R. from Hs/Rm. c. to SG. Wor. [text struck through] c. to M. Der. [text struck through] c. to BY. [text struck through] ORIGINAL Hs/Rm3/LG24. 4. 29. X7340 X4549 PROPELLER SHAFT UNIVERSAL JOINTS. We… | ||
| Scan208 | On lubrication procedures for joints with an attached blueprint diagram. | ||
| View original record | contd :- -2- oil at any speed. If the joint is rotated until the lubricator is vertically beneath it, and the small plug taken out to provide an air release at the upper extremity of the joint, the… | ||
| Scan209 | Central lubrication scheme for the chassis and axles. | ||
| View original record | To R. from Hs/Gy c. to Sg. Wor. c. to E. DA. c. to BY. ORIGINAL Hs/Gy1/LG27.4.29. CENTRAL LUBRICATION, 3806 Although we believe we now have a scheme for chassis lubrication which is serviceable and… | ||
| Scan210 | Proposal outlining modifications to the central oiling and lubrication system for the front axle, rear axle, and steering components. | ||
| View original record | contd :- -2- In the case of the front axle, we suggest it might consist of : (1) A flexible pipe from a junction on the main system on the frame to a connection in the end of the shock damper rocking… | ||
| Scan211 | Improvements to a one-shot lubrication system, focusing on oil pump capacity and rear axle access. | ||
| View original record | contd :- -3- drip plugs (S.S.) would be dependent on it. We base our correct lubrication on the No.0. size drip plugs receiving 5 drops of oil per shot of the pump. Since with the increased demand… | ||
| Scan212 | Technical position and potential re-examination of alkaline batteries. | ||
| View original record | To R. from EFC. c. SG. E. c. EY. Wor. ORIGINAL EFC5/T29.4.29. ALKALINE BATTERIES. x3717 We have done nothing with alkaline batteries since June 1924 at which time the Alklum and Ni-Fe batteries which… | ||
| Scan213 | Options for 6-volt batteries, including their dimensions and a recommendation for a practical type. | ||
| View original record | -2- Contd. (1) To accept 6-volt units of their present standard dimensions (quoted dimensions of 6-volt five cell units 12 3/4" x 7" x 10 1/4" high, weight 53 lbs), and somehow make room for the… | ||
| Scan214 | Testing and development of S.S. Hydraulic Dampers. | ||
| View original record | To R. from Hs. c. to Sg. Wor. c. to E. DA. c. to BY. ORIGINAL Hs2/LG29.4.29. S.S. HYDRAULIC DAMPERS. X235/27941 Since your recommendation with reference to the S.S. shock absorbers, we have been… | ||
| Scan215 | Comparison of the K.S. petrol gauge with the Nivex and Hobson models, detailing operational issues and improvements. | ||
| View original record | To R. from Hs/Rm. c. to SG. Wor. c. to E. DA. c. to BY. Hs/Rm3/LG29.4.29. ORIGINAL K.S. PETROL GAUGE. X 4038 For the past two years we have been experimenting with the K.S. petrol gauge. We consider… | ||
| Scan216 | Marked print of a cylinder, comparing the thinner machined sections on the 12-G4 car to the standard 17-G3 car. | ||
| View original record | ORIGINAL To E. from Hs. Hs1/T30.4.29. X5080 We attach herewith marked print of the cylinder as fitted to 17-G3 car. The cylinder on 12-G4 is a standard cylinder machined out so that the sections are… | ||
| Scan217 | The design and operation of Chrysler's automatic radiator shutters. | ||
| View original record | To R: from Hs/Tsn. c. to Sg. Wor. c. to E. DA. c. to BY. Hs/Tsn1/LGL.5.29. CHRYSLER AUTOMATIC RADIATOR SHUTTERS. X4012 X3499 The attached sketch shews one of the elements for the Chrysler Thermostat… | ||
| Scan218 | Blueprint drawing of a Chrysler thermostat element. | ||
| View original record | CHRYSLER THERMOSTAT ELEMENT. BOTH SIDES ARE CONCAVE WHEN COLD THERE ARE FIVE OF THESE BRASS ELEMENTS, WITH FOUR CORRUGATED BRASS SEPARATORS. WE DO NOT KNOW THE ACTIVE MEDIUM. ROYCE, LIMITED TEST ROOM… | ||
| Scan219 | On the necessity of automatic water temperature control for the S.S. model to improve performance and acceleration. | ||
| View original record | To R. from Hs. c. to Sg. Wor. c. to E. DA. c. to BY. Hs2/LG1.5.29. ORIGINAL X7250 --- X3499 S.S. WATER TEMPERATURE CONTROL. Although we are against fitting any unnecessary complications on the S.S.,… | ||
| Scan220 | Internal memorandum discussing the reduction and division of the S.S. & Phantom tool kit to save weight and space. | ||
| View original record | To R. from Hs/Gy. c. to Sg. Wor. c. to E. DA. E. to BY. ORIGINAL RE. REDUCTION OF S.S. & PHANTOM TOOL KIT. X7380 / X8580 We have now examined the possibility of reducing and dividing the tool kit as… | ||
| Scan221 | Breakdown of the weights of the tool kit for the S.S. and Phantom models, detailing total weight, essential road tools, and individual item weights. | ||
| View original record | contd :- -2- PARTICULARS RELATING TO TOOL KIT ON S.S. AND PHANTOM. Total weight of tool kit lbs. 57 (a) Weight of tools rarely used on road (excluding box spanners) 15 1/2 (b) Weight of tools… | ||
| Scan222 | List of tools and spares rarely required on the road for the S.S./ Phantom model. | ||
| View original record | S.S./ PHANTOM. TOOLS AND SPARES RARELY REQUIRED ON ROAD. U.1479 C. Spanner (pump coupling nut). G.6422 Spanner (Nut for Steering column). Valve grinding mechanism. E.79087 Spanner (rocker screw).… | ||
| Scan223 | Recommended winter and summer oils for the Bijur lubrication system. | ||
| View original record | To R. from Hs/Gy c. to Sg. Wo r. c. to E. c. to BY. ORIGINAL Hs/Gy3/LG1.5.29. X3806 N563 CHOICE OF OILS FOR BIJUR SYSTEM. In view of R1/M23.4.29., now we can use two oils, one for winter and one for… | ||
| Scan224 | Force required to operate a press button starter switch. | ||
| View original record | ORIGINAL To E. from EFC. EFC2/T4.5.29. S.S. PRESS BUTTON STARTER SWITCH. We have received your E1/M2.5.29. The matter is being looked into and BY. will be writing on the subject. It was our… | ||
| Scan225 | Tests on different pinion gear teeth designs to resolve motor engagement jamming issues. | ||
| View original record | To R. from EFC. c. SG. E. c. BY. Wor. S.S. MOTOR ENGAGEMENT. It will be remembered that when we tried a pinion with sharp engaging corners, rounded disengaging corners and nonbacked-off teeth, we ran… | ||
| Scan226 | Manufacturing process of sharp-edged pinions for experimental cars. | ||
| View original record | EFC1/T4.5.29. -2- Contd. completely sharp edged pinions for other experimental cars because if such pinions turn out to give consistently equally good results, there would appear no reason for the… | ||
| Scan227 | Investigations into the operating qualities of the 'green lamp scheme' and variations in battery voltage due to temperature changes. | ||
| View original record | To R. from EFC. c. SG. R. c. HY. Nor. ORIGINAL EFC5/T8.5.29. GREEN LAMP SCHEME. X4040 X7780 Since writing our report EFC2/T1.2.29, in which reference was made to the operating qualities of the green… | ||
| Scan228 | Analysis of the green lamp indicator for the battery charging system and its operational characteristics. | ||
| View original record | Contd. -2- EFC5/T8.5.29. of the green lamp switch unit to what we considered to be a suitable value, it had been stated that if the indications of the green lamp unit were followed consistently, the… | ||
| Scan229 | Page from a document discussing the function of a green indicator lamp and its effect on battery charge. | ||
| View original record | -3- Contd. On the other hand, if the indications of the green lamp are taken as an injunction to the driver to switch off charge whenever it lights, then due to the fact that the charge does not… | ||
| Scan230 | Engine mounting modifications and their effect on chassis vibration ('jellying') on a 20 HP car. | ||
| View original record | To R. from Hs. c.c. to Sg. Wor. c.c. to E. DA. c.c. to BY. ORIGINAL Hs2/LG15.5.29. 20 HP. 12-G4. Handwritten notes: X5770, X5807(crossed out), X5380 We have carried out the modification to the engine… | ||
| Scan231 | Cover note for a report on the 10,000 miles test of S.S. Chassis 22-EX 'C' Type in France. | ||
| View original record | To. Mr. Hives. C. to Mr. HOT. C. to Mr. DB. C. to Mr. BY. C. to Mr. FHR. ORIGINAL Hs/LG17. 5. 29. S.S. CHASSIS 22-EX 'C' TYPE. 47941 10,000 MILES TEST IN FRANCE. We attach copy of a general report in… | ||
| Scan232 | The 10,000 miles test in France for chassis No 22 EX 'C' type. | ||
| View original record | To Hs. From G.W.H. Hotel de France Chateauroux Indre 2/5/29 S.S. CHASSIS NO 22 EX "C" TYPE FITTED WITH A HOOPER CLOSED LANDAULETTE BODY 10,000 MILES TEST IN FRANCE General remarks on the running of… | ||
| Scan233 | Engine component issues including crankshaft rattle, valve clearances, piston knock, and ignition plug failures. | ||
| View original record | -2- A crankshaft period at 40 M.P.H. developed after approximately 4,500 miles and became very noticeable. At the same time there was also a spring drive rattle at a speed of 25 M.P.H. We reduced the… | ||
| Scan234 | Test report on the performance of components including timing gears, vacuum pump, carburettor, and exhaust fittings. | ||
| View original record | -3- ENGINE GEARS COMPRISING IDLER GEAR TO LOP E 77658 SOLID TYPE CAM WHEEL, FLEXIBLE COUPLING TO DYNAMO DRIVE TO LEC 2631 The timing gears have had a period throughout the test where they have been… | ||
| Scan235 | The performance and issues with various components including the exhaust, radiator, bonnet, and oil pump. | ||
| View original record | -4- The joint requires strengthening. It has opened out and allows the exhaust to escape which has made the exhaust noisy. The exhaust pipe appeared at first as if it was going to give trouble. It… | ||
| Scan236 | Test report detailing performance and issues with various vehicle components including the fan, gearbox, clutch and propeller shaft. | ||
| View original record | -5- FAN TO LOP E 77672 The fan bearings have been slack and noisy throughout the test. The fan blades have fouled the radiator controls when the radiator was fully opened. The fan requires dropping to… | ||
| Scan237 | The inspection and modification of various chassis components, including axles, brakes, steering, springs, and dampers. | ||
| View original record | -6- We find that on maximum bump the propellor shaft just fouls the cross member. The clearance with the car standing is 3.750 with a rear buffer clearance of 4.750" FRONT AXLE AND BRAKES TO LOP G… | ||
| Scan238 | The performance of various rear chassis components, including brakes, shock dampers, springs, spare wheel carrier, and subframe. | ||
| View original record | -7- There has been a general transmission period from 40 M.P.H. upwards. The ankorages for the shock damper ball ends on the axle require strengthening. The ball end on the N/S came loose and the… | ||
| Scan239 | The performance and failures of wings, valances, and various electrical components. | ||
| View original record | -8- WINGS VALANCES LOP F 79335 There has been no failure of wing stays. The wings and valances are in good condition. ELECTRICAL UNITS STARTER MOTOR TO LEC 2647 The starter motor as reported very… | ||
| Scan240 | Actions taken on failures from a 10,000-mile test of the '3S' Chassis 22-EX. | ||
| View original record | To R. from Hs/GWH. c.c. to Sg. WoR. c.c. to E. DA. c.c. to BY. ORIGINAL Hs/GWH/LG24.5.29. '3S' CHASSIS - 22-EX. X7941 c The following failures reported in the 10,000 miles report 2.5.29. have been… | ||
| Scan241 | List of identified vehicle faults and proposed engineering solutions. | ||
| View original record | contd :- -2- A definite stop is being made to limit the upward movement of the fan and will not allow the blades to foul the controls. This is to be fitted to all cars on production. Gearbox and… | ||
| Scan242 | The chassis condition of model 18-EX after 18,000 miles, detailing issues with the rear shackle and soldered pipe joints. | ||
| View original record | To R. from Hs/Gy. c. to Sg. Wor. c. to RG. E. c. to DA. BY. ORIGINAL Hs/Gy1/LG24. 5. 29. REPORT ON CHASSIS CONDITION OF 18-EX X3806 AFTER 18,000 MILES. X 7420 The general condition of the wearing… | ||
| Scan243 | Inspection report detailing the lubrication and wear condition of various vehicle components. | ||
| View original record | UNIT SUPPLIED. Front road springs. N.S. rear. N.S. front. O.S. rear. O.S. front. Rear road springs. N.S. front. N.S. rear. O.S. front. O.S. rear. Foot and hand brake equaliser shaft. Starter motor -… | ||
| Scan244 | Condition report on the lubrication and wear of various vehicle component bearings. | ||
| View original record | UNIT SUPPLIED. | CONDITION OF BEARINGS. Hand brake shaft. | Ample lubrication - bearings good. Clutch and foot brake shaft. | Well lubricated. Front brake shaft. | Well lubricated - bearings good.… | ||
| Scan245 | Inspection report detailing the condition of bearings for various supplied units. | ||
| View original record | UNIT SUPPLIED. CONDITION OF BEARINGS. Side steering tube. | Slight rust, water in joint. Oil present. Contacts and ball good. Rear axle units. Rear/operating shafts. brake | All four near bearings… | ||
| Scan246 | Analysis of a 22-EX starter failure in France, detailing the distortion of ebonite components. | ||
| View original record | R. from EFC. c. SG. c. RV. Wor. EFC5/D27.5.29. ORIGINAL X.7655. 22-EX STARTER FAILURE IN FRANCE. X.7680 X.8692. The components of the starter system have now been received in the Electrical… | ||
| Scan247 | Analysis of a starter motor fault involving pinched brush flexibles and comparison of switch designs. | ||
| View original record | -2- EFC5/D27.5.29 contd. Apart from the fact that the base of this switch would now be a bakelite moulding, it will be remembered that this design of switch has been temporarily replaced by the older… | ||
| Scan248 | Comparing the cooling performance of the 'SS' car against Phantom models. | ||
| View original record | To R. from Hs/Sm. c.c. to SG. Wor. c.c. to DA. E. c.c. to PN. OY. c.c. to BY. Hm. ORIGINAL Hs/Sm/Ld27.6.29. COOLING ON 'SS' CARS. 4766 / x7250 x8250 In view of the fact that the cooling of the SS. has… | ||
| Scan249 | Test report comparing cooling performance between cars with louvered and plain bonnets to address overheating at high speeds. | ||
| View original record | contd :- -2- Our tests shew that the SS. is better cooled for hill climbing than any 40/50 HP. car we have previously had. We know that the specific complaint was that the car over-heated at high… | ||
| Scan250 | Engine cooling performance, overheating issues, and the effectiveness of louvred bonnets on different car models. | ||
| View original record | contd :- -2- With the wind : SS. car 19-EX........... 90°C (Would be Phantom car 73-OR....... 95°C (boiling at (ats. temp. of (30°C. It will be thus seen that in both cases the SS. car shews up… | ||
| Scan251 | Graph comparing the top water temperature of three different car models during a hill climb test, with radiator schematics. | ||
| View original record | TEST CAT AND FIDDLE HILL NO BONNET VENTILATION AIR TEMP 15°C EACH CAR CARRIES 3 PASS AND 5 CWT BALLAST ① S.S. CAR 22 EX WT. EMPTY 48.3 CWT ② PHANTOM CAR 14 EX WT. EMPTY 49.75 CWTS ③ OLD PHANTOM CAR 18… | ||
| Scan252 | Blank page with an ink stamp from the Print Room in Derby. | ||
| View original record | ROYCE, LIMITED PRINT ROOM, 28 1 MAY 1929 DERBY. | ||
| Scan253 | Issues with inconsistent servo action, proposing a new oil-soaked woven cotton servo lining as a solution. | ||
| View original record | To R. from Hs/Rm. c. to SG. Wor. c. to E. DA. c. to BY. Hs/an3/LG.29.5.29. S.S. BRAKES AND SERVO. X7420 X7370 With reference to OY/4.6.29. In our experience inconsistent servo action has been mainly… | ||
| Scan254 | Analysis of brake lining materials, wear characteristics, and alternative cam setups to improve brake performance. | ||
| View original record | contd :- -2- Tests we have been carrying out during the past year rather confirm OY's remarks that hard linings with tremendous wearing qualities give poor life in the long run due to scored drums and… | ||
| Scan255 | Analysis of squeaking brakes, comparing different brake lining materials and potential solutions. | ||
| View original record | contd :- -3- proportionally greater than that of the rear brakes for the work they do. Squeaking brakes are certainly a very considerable problem and are in evidence whenever we try and increase the… | ||
| Scan256 | The 10,000-mile test of lubricated cotton duck servo linings. | ||
| View original record | COPY. To Hs/Rn. from Hs/GWH. RE. LUBRICATED COTTON DUCK LININGS FOR 'SS' SERVO. We carried out tests during the 10,000 miles in France with the cotton duck servo linings lubricated. We found that upon… | ||
| Scan257 | Modifications and observations of the S.S. sequence starter system. | ||
| View original record | ORIGINAL R. from EFC. c. SG. c. Ev. c. E. DA. Wor. EFC2/AD4.6.29. X.7655. S.S. STARTER SYSTEM. X.7625 We have now, in adopting the latest approved modifications of the S.S. sequence starter motor… | ||
| Scan258 | The testing of a gear engagement system, noting issues and adjustments for production on chassis 18-EX. | ||
| View original record | -2- contd. engagement when the engine fired, appeared to be slightly prolonged, the result being a more prolonged gear scream on dis-engagement. As stated, we are of the opinion that we have slightly… | ||
| Scan259 | Modifications to a switch, discussing magnetic traction, contact pressure, corner jams, and gear noise. | ||
| View original record | -3- contd. uniformly perfect, this however, remains to be seen. On the whole so far, these contacts have not done badly. As a result of certain minor electrical and magnetic modifications which we… | ||
| Scan260 | Engine starting issues, specifically how a single explosion can activate the hold-off coil, and a proposed solution involving a centrifugally or oil relay operated switch in the teazer circuit. | ||
| View original record | -4- contd. thought to be stopped is running, and the button is pushed. Another point is, that it sometimes happens in starting, that the engine gives a few, and frequently only one explosion, without… | ||
| Scan261 | The unsatisfactory performance of platinum points on the Watford E.W.6. magneto. | ||
| View original record | R. from EFC/HEW c. Sg. c. BY. Wor. EFC is absent EFC/HEW1/ADL4.6.29. X.7791. WATFORD E.W.6. MAGNETO. We are not satisfied with the performance of the platinum points on the Watford E.W.6 magneto.… | ||
| Scan262 | Use of tungsten points in magnetos to reduce wear. | ||
| View original record | contd. -2- We should like to see them experiment more with tungsten points, which are much less susceptible to burning away. Some of the Lucas magnetos we tested some time ago, gave very satisfactory… | ||
| Scan263 | Specification sheet and performance graph for Chrysler valve springs. | ||
| View original record | CHRYSLER VALVE SPRINGS. FIG. 1. Stress lbs/sq in. W load. lbs. 105,000 173 78,800 84 48,350 54 27,450 .312" .580 V.C. .862 V.O. 1.762" Δ. Deflection" PARTICULARS ARE: FREE LENGTH 3.300" LENGTH. V.C.… | ||
| Scan264 | Blueprint of the Propellor-Shaft Universal Joint for a Chrysler '75'. | ||
| View original record | 'PROPELLOR-SHAFT UNIVERSAL JOINT — CHRYSLER "75"' FIG. 7. WELDED LEATHER COVER CONNECTS THESE TWO. 14 JUN 1929 J.S.A. 9/4/29. | ||
| Scan265 | Drawing of a Chrysler rubber engine mounting system, showing rear feet and front anchorage. | ||
| View original record | CHRYSLER RUBBER ENGINE MOUNTING. FIG. 2 REAR ENGINE FEET FRONT ENGINE ANCHORAGE - 1 EACH SIDE. SHEET METAL X MEMBER ROLFED IN BETWEEN GEAR BOX AND CRANK CASE SMALL CASTING. ? MALLEABLE IRON. SHEET… | ||
| Scan266 | Graph of Chrysler valve lift curves for the exhaust and inlet valves, plotted against crankshaft degrees. | ||
| View original record | VALVE LIFT CURVES - CHRYSLER. CLEARANCE (COLD) INLET: .005" EXHAUST: .008" OBSERVED VALVE TIMING: I.O. 11° B.T.D.C. I.C. 64° A.B.D.C. E.O. 42° B.B.D.C. E.C. 11 1/2° A.T.D.C. FIG. 3 LIFT. .300" .200"… | ||