Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Improvements and comparative testing for 'SS' cars, focusing on reducing resonance and noise. | ||
| View original record | To R. [struck through] From Hs. c. to SG. Wor. [struck through] c. to E. BA. [struck through] c. to SY. [struck through] [Handwritten]: X7380 [struck through] X7770 [struck through] X1698 'SS' CARS.… | ||
| Scan002 | Typed memo arranging a meeting at Bignalls Corner concerning 'SS' Cars. | ||
| View original record | To Sg. from Hs. c. to R. Wor. c. to DA. BY. c. to E. ORIGINAL Hs3/LG3. 7. 29. 'SS' CARS. X7770 It will be convenient for us to meet at Bignalls Corner where the Wellyn bypass road crosses the Barnet… | ||
| Scan003 | Test results on different schemes for fabric couplings to improve their lifespan. | ||
| View original record | To R. from Ms/Ru C. to Sg. Wof. C. to E. DA. C. to Hy. CY. ORIGINAL. Fabric Couplings. X7305 In view of the fact that the fabric coupling on the J.S. will not be as accessible or visible as that on… | ||
| Scan004 | 50% greater life of a coupling using spigoted bolts compared to unspigoted bolts. | ||
| View original record | contd :- -2- of the fabric. We find that with these bolts spigoted as in sketch A. the life of a coupling is 50% greater than with unspigoted bolts. The reason for the existing scheme would appear to… | ||
| Scan005 | Cross-section drawing of a mechanical fastener assembly. | ||
| View original record | G76906 | ||
| Scan006 | Archival stamp from the Print Room in Derby. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 5 JUL 1929 DERBY. | ||
| Scan007 | Blueprint showing different test configurations for a fabric coupling. | ||
| View original record | FABRIC COUPLING TESTS. SHOULD BE SPIGOTED (AS A) A. G.73570 EXPERIMENTAL SHOULDER RIVETS. SCREWS TO G.77763 | ||
| Scan008 | Stamped document from the Print Room in Derby. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 10 JUL 1929 DERBY. | ||
| Scan009 | Issues with the S.S. exhaust system's cut-out valve and proposing a strengthened replacement. | ||
| View original record | To R. From HS/AJL. C. to SS. WOR. C. to EY. R. C. to DA. HS. HS/AJL2/MJ.6.7.29 X N230. > Prints X N490? altc S.S. EXHAUST SYSTEM: Cut Out Valve. Trouble has been continually experienced with the… | ||
| Scan010 | Blueprint cross-section of a Standard Drip Plug. | ||
| View original record | STANDARD DRIP PLUG. A. B. C. D. F. H. L. O. R. | ||
| Scan011 | The adoption of K.T.A. type Duralumin Drip-plugs for the Bijur lubrication system, outlining the advantages. | ||
| View original record | To R. from Hs/Gy. C. to Sg. Wor. C. to E. DA. C. to By. ORIGINAL x3806. RESTRICTION UNITS ON BIJUR LUBRICATION We have received samples of the K.T.A. type Duralumin Drip-plugs, which are the latest… | ||
| Scan012 | Potential design alterations to connections and sending samples for investigation. | ||
| View original record | -2- (4) A slight saving in weight. We believe we may desire to alter slightly the design of the connections, especially the square portion, to make it neater, and of course we should not make use of… | ||
| Scan013 | Trial of a lower compression ratio on S.S. cars to improve engine smoothness. | ||
| View original record | SECRET. ORIGINAL To R. from C. to Sg. Wor. C. to E. Da. C. to By. S.S. CARS. ----------- x7770 x490. We have tried one of the Expl. cars with the compression ratio reduced to the same as the standard… | ||
| Scan014 | Modification to a cylinder head for S.S. Engines, changing the compression ratio to 4.25. | ||
| View original record | [ "V688.", "MODIFICATION TO CYLINDER HEAD.", "Comp. Ratio = 4.25", "(For S.S. Engines)", "FOR ALL OTHER DIMENSIONS SEE E78854 (2 SHEETS)", "THE SHAPE OF THE STANDARD HEAD IS SHEWN IN DOTTED LINE.",… | ||
| Scan015 | Blank, folded paper with a Print Room stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 17 JUL 1929 DERBY. | ||
| Scan016 | Investigation into radiator choking issues and the proposed solution of increasing the tube gap. | ||
| View original record | To R. from Hs/Rm. c. to Sg. Wor. c. to L. Da. c. to BY. ORIGINAL Hs/Rml/MJ. 26. 7. 29. X7250. X766 RADIATORS. ************ We have received several complaints of Radiators becoming choked in service.… | ||
| Scan017 | The hydraulic restriction and cooling efficiency of a gap radiator matrix. | ||
| View original record | -2- gap radiator. The hydraulic restriction of the matrix is much reduced. From our experience we are sure that increasing this gap will not reduce the cooling efficiency of the matrix. HS. | ||
| Scan018 | Starter motor torque, power, and efficiency performance with particular reference to the S.S. starter motor. | ||
| View original record | R. from EFC. c. Sg. c. Ry. c. E. Da. Wor. ORIGINAL EFC4/AD27. 7.29. STARTER MOTOR TORQUE X7625 POWER AND EFFICIENCY PERFORMANCE WITH PARTICULAR REFERENCE TO THE S.S. STARTER MOTOR. In comparing the… | ||
| Scan019 | Page detailing the relationship between motor torque, current, and speed with relevant formulas. | ||
| View original record | -2- contd. relation of torque (Ts) (pound-inches) (on conductors) to current (C) (amperes) subsists very nearly correctly when the motor is running. There is the relation :- ∅s = β (Ts / C) where ∅s… | ||
| Scan020 | Analysis of motor efficiency by comparing electrical and mechanical properties through plotted curves. | ||
| View original record | -3- contd. current in the field windings only, but is less in general and approximates/[very] closely to the actually existing back E.M.F. upon which the conversion of electrical to mechanical power… | ||
| Scan021 | Page detailing brake test arrangements and torque correction for motors with epicyclic reduction gears. | ||
| View original record | -4- contd. In the cases of motors normally utilising an incorporated epicyclic reduction gear, it was more expedient to arrange for the brake test arrangement to include this reduction gear. In these… | ||
| Scan022 | Performance and efficiency analysis for the Standard 6' Phantom motor and the Original No.1 Scheme 5' Sequence motor. | ||
| View original record | -5- contd. 1. R.R. STANDARD 6" DIAMETER PHANTOM MOTOR WITH 6 : 1 REDUCTION GEAR AND 45 ARMATURE SECTIONS. At the time the results for this motor were observed we did not use the definite volt-ampere… | ||
| Scan023 | Comparative analysis of the efficiency and performance of various electric motor designs. | ||
| View original record | -6- contd. torque at heavy current due to saturation as shown by Øs curve. Poor mechanical efficiency. 3. FIRST NO.2 SCHEME 5" DIAMETER SLIDING ARMATURE SEQUENCE MOTOR (K) WITH RAPIDLY TAPERING… | ||
| Scan024 | Performance analysis of a 5-inch diameter lengthened 37 section slow taper sliding armature sequence motor. | ||
| View original record | -7- contd. 6. UP TO DATE R.R. S.S. 5" DIAMETER LENGTHENED 37 SECTION SLOW TAPER SLIDING ARMATURE SEQUENCE MOTOR. Maximum overall efficiency is .485 and occurs at 125 amperes, the corresponding… | ||
| Scan025 | Comparison table of design figures versus actual performance data for an R.R. sequence motor. | ||
| View original record | -8- contd. better proportioned teeth and slots than in previous cases. On the other hand the mechanical efficiency is a good deal poorer than assumed in the design. The actual comparison is :-… | ||
| Scan026 | Page from a report detailing motor resistance, torque, and performance comparisons. | ||
| View original record | -9- contd. To this end the total motor resistance should be in the neighbourhood of 6/300 = .020 ohm when cold. Actually the running value of each motor resistance is exhibited on the curves given on… | ||
| Scan027 | Reference sheet defining the symbols and formulas for starter motor quantities. | ||
| View original record | REFERENCE SHEET OF SYMBOLS OF STARTER MOTOR QUANTITIES. C (amperes) Motor current (basic variable). N (R.P.M.) Motor speed. E (volts) Terminal impressed P.D. (follows rule E = 12.00 - .02 C ) ee… | ||
| Scan028 | Table comparing starter motor power and efficiency data for various motor types. | ||
| View original record | STARTER MOTOR POWER AND EFFICIENCY DATA. COLUMN HEADERS: - Curve Ref. No. - Motor - Carcase dia(") - Armature Dia(") - Armature Length(") - No. of conduc Lore. - No. of field turns per pole. - Amperes… | ||
| Scan029 | Performance graph showing the characteristics of a starter motor versus torque. | ||
| View original record | STARTER MOTOR BRAKE EFFICIENCY X.3082 R.R. EXPL MOTOR X. 3009 APPROX. WORKING POINT ON 40/50 CHASSIS AXIS LABELS: ELECTRICAL H.P. EFFICIENCY VOLTAGE AMPERES B.H.P. R.P.M. TORQUE (POUND INCHES) CURVE… | ||
| Scan030 | Blank document back page with a date stamp. | ||
| View original record | 25 JUL 1929 BY. | ||
| Scan031 | Performance graph showing the brake efficiency of a Sequence Starter G.2. | ||
| View original record | STARTER MOTOR BRAKE EFFICIENCY. SEQUENCE STARTER G.2. Y-AXIS LABELS (from left to right): ELECTRICAL H.P. EFFICIENCY VOLTAGE AMPERES B.H.P R.P.M. X-AXIS LABEL: TORQUE (POUND INCHES) CURVE LABELS:… | ||
| Scan032 | Performance graph charting the brake efficiency and other characteristics of Sequence Motor K against torque. | ||
| View original record | STARTER MOTOR BRAKE EFFICIENCY SEQUENCE MOTOR K. ELECTRICAL H.P. EFFICIENCY VOLTAGE AMPERES B.H.P. R.P.M. TORQUE (POUND INCHES.) AMPERES E.H.P. VOLTS B.H.P. EFFICIENCY SPEED 3 | ||
| Scan033 | Graph showing the brake efficiency and performance characteristics of a pre-war R. Bosch starter motor. | ||
| View original record | STARTER MOTOR BRAKE EFFICIENCY R. Bosch S.45 (PRE WAR.) ELECTRICAL H.P. EFFICIENCY VOLTAGE AMPERES R.P.M TORQUE (POUND INCHES) AMPERES B.H.P. E.H.P. EFFICIENCY VOLTS SPEED | ||
| Scan034 | Performance graph showing the brake efficiency of a post-war R. Bosch sliding armature starter motor against torque. | ||
| View original record | STARTER MOTOR BRAKE EFFICIENCY R.BOSCH. SLIDING ARMATURE (POST WAR) Graph Lines: AMPERES E.H.P. B.H.P. VOLTS EFFICIENCY SPEED Vertical Axes Labels (from left to right): ELECTRICAL H.P. EFFICIENCY… | ||
| Scan035 | Performance graph for an S.S. Sequence starter motor, plotting efficiency, power, speed, voltage, and current against torque. | ||
| View original record | STARTER MOTOR BRAKE EFFICIENCY, MOTOR T S.S. SEQUENCE MOTOR X-AXIS: TORQUE (POUND INCHES) Values: 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150 Y-AXES (from left to right): 1.… | ||
| Scan036 | Blank document with a receiving stamp. | ||
| View original record | ROYCE, LIMITED DEVT ROOM, 25 JUL 1929 Y. | ||
| Scan037 | Comparative test of radiator tubes for 'S.S' model radiators. | ||
| View original record | Filing Copy ORIGINAL To R. from Hs/Rm. Hs/Rm3/BE7.8.29. Copy to Sg. Wor. E. EY. Ds. Oy. Hm. X4250. X766. "S.S" RADIATORS We have made a careful comparative test of the 6/7 m.m. tubes and the 5 1/2/7… | ||
| Scan038 | Recommending a locking device for bonnet catches to prevent the loss of knobs during testing. | ||
| View original record | To R. from Hs/GWL. c. to SE. MOR. c. to K. Ds. c. to HY. ORIGINAL filing Hs/GWL.1/WJ.13. 3. 29. X7260. X1140. "S.B." Bonnets to LOP E78559 with Push type catches to N32464. We had during the tests in… | ||
| Scan039 | Test results detailing various methods and times for climbing Ticknall Hill. | ||
| View original record | To E. From Hs/AJL. C. to Da. Hs/AJL.1/MJ.22.8.29. x488 x8774 x7310. ORIGINAL A series of tests were carried out to find out the method of driving to be followed in order to climb Ticknall Hill in the… | ||
| Scan040 | Comparing the torsional stiffness, weight, and specifications of a new S.S. crankshaft with large pins against standard models. | ||
| View original record | To R. from Hs/Tsn. c.c. to Ss. Wor. c.c. to E. Da. c.c. to Ey. ORIGINAL. Hs/Tsn.1/MJ.29.8.29. X 7010 X 8010 X1418. S.S. CRANKSHAFT WITH LARGE PINS. ----------------------- We have twisted this shaft… | ||
| Scan041 | Hydraulic resistance and choking issues in various engine radiator series. | ||
| View original record | To Ba. from Hs/Rm. c. to By. E. ORIGINAL COOLING SYSTEMS. ------------- With reference to Da2/M24.8.29. RADIATORS CHOKING UP. We do not think that there is any mystery in the fact that the hydraulic… | ||
| Scan042 | Page discussing radiator obstruction in the top row of tubes, comparing F2B series and V series vehicles. | ||
| View original record | -2- normal conditions, our main worry at the moment is the increase in this restriction due to obstruction. Opening up radiators has proved that almost invariably this obstruction is confined to the… | ||
| Scan043 | Blueprint showing dimensions for 'V' Series, 'F2B' Series, and 'S.S. Chassis' components. | ||
| View original record | Top Diagram: 22.600 'V' SERIES E.72740 3.800 Middle Diagram: 23.800 F2B SERIES E.76044 1.750 3.600 Bottom Diagram: 23.300 S.S. CHASSIS E.77675 1.750 2.80 Stamp (bottom right, faint): ROLLS-ROYCE… | ||
| Scan044 | Difficulties with a lubrication scheme and a proposal for a temporary solution using the starter carburetter. | ||
| View original record | To E. from Hs/Rm. c. to Sg. Hs. c. to EP. ORIGINAL Hs/Rm.1/MJ.3.9.29. X7050 S.S. EXTRA CYLINDER LUBRICATION. ----------------------- With reference to El/M8.7.29, there are one or two difficulties in… | ||
| Scan045 | Page 2 of a letter stating that a sketch of the bits being used is attached. | ||
| View original record | -2- We attach a sketch of the bits we are using. Hs/Rn. | ||
| Scan046 | Blueprint for five brass oil jets. | ||
| View original record | [ "HS.228.", ".525", ".375", ".100", "SCREW 5/8 DIA 20 TPI", ".700 DIA", ".187 DIA", ".050", ".350", "1.200", "1.300", "±5", ".062 DIA", "±1", ".312 DIA", "±3", ".560 DIA", "±5", "TAP 7/16 DIA 22… | ||
| Scan047 | The back of a document showing a purple ink date stamp. | ||
| View original record | LIMITED ROOM, 3 SEP 1929 DERBY. | ||
| Scan048 | Blueprint for an Oil Jet made of brass. | ||
| View original record | Hs 228, 15-8-29, SCREW 3/8 DIA 20 TPI, .062 DIA, +1 -4, 1.250, 25, .325, .250, 1.125, 410, .400, SCREW 1/4 GAS, 60°, .601 ACROSS FLATS, .187 DIA, +3 -2, .450 DIA, 2.300, -10, OIL JET - 1 OFF - BRASS - | ||
| Scan049 | The back of a document with a purple ink stamp from the Print Room in Derby. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 3 SEP 1929 DERBY. | ||
| Scan050 | Blueprint detailing the specifications for an oil jet for the No. 1 cylinder. | ||
| View original record | OIL JET FOR No 1 CYLINDER DRILL .328 DIA TAP - .375 DIA 20 TPI 14° 55° 90° L.S / 7 O . 9 | ||
| Scan051 | Blueprint drawing of oil jets for cylinders. | ||
| View original record | Hs. 228 OIL JETS FOR CYLINDERS - S.S. THIS JET FOR ALL CYLS EXCEPT NO. 1; BANJO UNION AS SAMPLE SUPPLIED. .900" 1.175 SAWCUT SIDE OF PISTON Tch. 31/1/29 | ||
| Scan052 | Blueprint of a starter carburettor shaft assembly with operating levers and an oil supply dashpot. | ||
| View original record | OPERATING LEVERS DRAWN 90° TO CORRECT PLANE FOR CONVENIENCE Hs 22 STARTER CARB SHAFT TO PISTONS PACKING ANY THICKNESS REQUIRED ANY STANDARD BANJO FITTING .250 L.P. OIL SUPPLY USE MAXIMUM NUMBER OF… | ||
| Scan053 | Blank document cover page with two purple ink date stamps from the Print Room. | ||
| View original record | ROYCE, LIMITED PRINT ROOM 3 SEP 1929 PRINT ROOM, 3 SEP 1929 DERBY. | ||
| Scan054 | Oil pressure characteristics and issues with the S.S. relief valve compared to the Phantom model. | ||
| View original record | To E. from Hs/Rm. X7205. X4160. S.S. RELIEF VALVE. Attached is a curve shewing the characteristics of the S.S. oil pressure. The S.S. oil pump is 7% larger than the Phantom. The relief valve passages… | ||
| Scan055 | Graph of engine S.S. Oil Pressures versus RPM for different valve and spring configurations. | ||
| View original record | S.S. OIL PRESSURES. ENGINE No S.S.15. STANDARD OIL PUMP. OIL TEMPERATURE = 60°C. ______ STD. RELIEF VALVE. _ _ _ _ WEAK SPRINGS (V694). -- -- -- DURALUMIN BALL VALVES & WEAK SPRINGS (V694). _._._._… | ||
| Scan056 | Blank page with a purple date stamp in the lower right corner. | ||
| View original record | LIMITED M. 12 SEP 1929 | ||
| Scan057 | Alternative positions and modifications for the 'S.S.' model front numberplate. | ||
| View original record | To DA. from Hs/AJL. c. to BY. ORIGINAL Hs/AJL.1/WJ.20.9.29. X7770 "S.S." FRONT NUMBERPLATE. --------------------- In reply to DAL/M.13.9.29., we have carried out the suggestion that the numberplate be… | ||
| Scan058 | Testing of various servo lining materials, like Halo and cotton duck, to improve braking efficiency. | ||
| View original record | ORIGINAL To R. from Hs/En. c. to Da. c. to By. c. to Sg. Hs/Bm.1/HW.21.9.29. x7370. In connection with the S.S. we have done a considerable amount of work on servos. It will be remembered that we were… | ||
| Scan059 | Servo efficiency tests, comparing different cams, polished pins, and ball bearings, with a final recommendation on lubrication. | ||
| View original record | -2- with its efficiency restored by using 30º cams. Curves V.680 were the average of a good many tests and indicate that the servo operation is much more consistent when the friction linings are… | ||
| Scan060 | Graph comparing the performance consistency of dry versus oil-soaked 'Cotton A' servo fabric under varying input loads. | ||
| View original record | [ "V680.", "24-6-29.", "COMPARISON OF CONSISTENCY OF PERFORMANCE", "OF DRY & OILED SERVO FABRIC.", "ENGINE No SS.5.", "45° CAMS.", "MAXIMUM PERCENTAGE VARIATION OF OUTPUT LOAD "B" OVER SEVERAL… | ||
| Scan061 | Graph of servo efficiency curves comparing load input against load output for various mechanical configurations. | ||
| View original record | SERVO EFFICIENCY CURVES (S.S.) SPRING BALANCES FOR ASCERTAINING LOADS "A" & "B" RIGGED UP AS SHOWN ON V536. LOAD OUTPUT "B" (LBS.) 100, 200, 300, 400, 500, 600, 700 LOAD INPUT "A" (LBS.) 200, 300,… | ||
| Scan062 | Lack of wear on S.S. car clutch control trunnion shafts and approving the design for the new 20 HP car. | ||
| View original record | To DA. from Hs/AJL. Hs/AJL.3/MJ.27.9.29. S.S. CLUTCH CONTROL. x7480. In reply to DAL/M23.9.29. we have examined the trunnion shafts on all our S.S. cars at present in Derby (viz. 19, 20, 21, and… | ||
| Scan063 | The bench and chassis testing of experimental Watford EW6A magnetos. | ||
| View original record | To R. from EFC. c. Sg. c. Ry. E. c. DA. Wor. Mx. ORIGINAL EFCL/AD30.9.29. X.7792. WATFORD EW6A MAGNETOS. X7792 Reference of previous report EFCL/AD20.7.29. Precis of previous report. Six experimental… | ||
| Scan064 | The performance and modification of EW6A magnetos, comparing them to the KW6 type. | ||
| View original record | -2- three thousand miles which the machines have so far run in their hands. Quoting from their report we have the following :- "The increase in efficiency at low speed on these EW6A magnetos is… | ||
| Scan065 | The condition of a magneto after a 500-hour bench test. | ||
| View original record | -3- "This magneto has run 500 hours on the bench rig at an average speed of 2950 r.p.m. working normally and lubricated regularly every 18 hours running. It was found necessary to clean the… | ||
| Scan066 | Test report on the burning of platinum points, deposits, and ventilated contact breaker covers for magnetos. | ||
| View original record | -4- excellent". The result of this test is largely to uphold what we consider approved, that the burning away of the platinum points is not necessarily due to hydro carbon vapours. The deposit of fine… | ||
| Scan067 | The new sleeveless type R.O.2 magneto for the 20 HP engine, detailing initial endurance testing and comparisons. | ||
| View original record | To R. from EFC. c. Sg. c. Hy. E. c. Da. Wor. Roy. ORIGINAL EFC2/AM.10.29. X5792 X.5792. NEW SLEEVELESS TYPE R.O.2. MAGNETO FOR 20 HP. For some time, as you know, we have requested Messrs. North to… | ||
| Scan068 | The preliminary testing and performance of two new magnetos compared to existing models. | ||
| View original record | -2- The two good magnetos were preliminarily tested on the bench with very good results, the low speed sparking of these magnetos, as in the case of the New Phantom type EW6A magneto, was very good,… | ||
| Scan069 | The cost, performance, and production readiness of different magneto types for a 20 HP chassis. | ||
| View original record | -3- though not quite as good as the experimental Watford type EW6A magneto reported upon in our EFC1/AD30.9.29. Further, the silence of operation of this machine is considered to be satisfactory.… | ||
| Scan070 | Complaints and attempted solutions for a clanking noise in the brake mechanism. | ||
| View original record | R. from Hs/Rm. C. SR. C. NOT. E. C. Da. Sy. Oy. ORIGINAL. HS/Rm/ADS.10.29. x7420 x7370 x5420 x5370 CLANKING OF BRAKE MECHANISM. We regularly get complaints about the clank which occurs in the brake… | ||
| Scan071 | Silencing brake system noises by fitting cushioned stops and a dash pot. | ||
| View original record | -2- that if we fit a stop to the front equalizer shaft, the trouble which at present occurs when the swinging arm friction increases temporarily, is overcome. The stop itself requires cushioning with… | ||
| Scan072 | Test report on a buffer stop applied to a servo balance lever to prevent clanking noises. | ||
| View original record | 2.10.29. TESTS CARRIED OUT WITH BUFFER STOP APPLIED TO SERVO BALANCE LEVER TO SKETCH R.1966. This stop was designed to prevent the clanking of the servo levers when released. The first test proved… | ||
| Scan073 | Description of a damper for the brake leverages and servo mechanism. | ||
| View original record | -2- This acts as a damper to all the leverages except the rear brake levers, and is not upset by any wear taking place in the brake mechanism. It not only quietens the clanking of the servo, but damps… | ||
| Scan074 | Blueprint of a 20 HP Front Brake Equalizing Stop and a Ferodo Buffer. | ||
| View original record | [ "1-312 crs", "0.300 RAD.", ".201 DIA HOLES", "21°", "2.100"", ".250", ".175", ".625", ".750 Dia", ".925 crs", "FERODO BUFFER", ".312", ".625"", "WELDED", "PLAN", "14 S.W.G.", ".080"", "20 H.P. FRONT… | ||
| Scan075 | Blank page with a purple ink date stamp in the bottom right corner. | ||
| View original record | ...CE, LIMITED ...ROOM, 8 OCT 1929 ...Y. | ||
| Scan076 | Blueprint of a front brake equalizer stop for a 20 HP vehicle. | ||
| View original record | FRONT BRAKE EQUALIZER STOP 20 HP ROYCE LIMITED PRINT ROOM 8 OCT 1929 | ||
| Scan077 | Blueprint of a rubber buffer applied to a servo balance lever for a 20 HP model. | ||
| View original record | [ "R.1966", "STOP TO BE SET SO THAT SERVO OPERATING LEVERS JUST REST ON THEIR STOPS WITH RUBBER COMPRESSED.", "CLIP TO BE PINNED AFTER SETTING.", "RUBBER BUFFER APPLIED TO SERVO BALANCE LEVER.… | ||
| Scan078 | Blueprint showing a proposed dashpot and stop for the servo mechanism on the Phantom II. | ||
| View original record | PROPOSED DASHPOT & STOP FOR SERVO MECHANISM. PHANTOM II 9 OCT 1929 DERBY | ||
| Scan079 | The Low Inertia Spring Drive for the Phantom II, highlighting a potential issue with ignition timing. | ||
| View original record | To R. from Hs/Tsn. Hs/Tsn5/AD12.10.29. c. Sg. Wor. E. Ds. Hy. X634 LOW INERTIA SPRING DRIVE - PHANTOM II. x7270 In connection with the above spring drive, which may be standardised shortly, there is… | ||
| Scan080 | Starter motor power tests, detailing production test specifications and results due to delays with the standard test rig. | ||
| View original record | To. R. from EFC. c. SG. c. EV. E. c. De. Wor. ORIGINAL. EFC1/ADL2.10.29. X7625 X7655' S.S. STARTER SYSTEM. STARTER MOTOR POWER. The results reported in our EFC4/AD27.7.29 were those of ordinary brake… | ||
| Scan081 | Report page detailing motor performance metrics and efficiency improvements with a table of results. | ||
| View original record | -2- Amperes 150 Volts 9.0 E.H.P. 1.81 Motor torque 60 lb-inches Motor speed 870 r.p.m. B.H.P. (on brake wheel on spindle) .83 Efficiency .46 the B.H.P. and efficiency in this case not including the… | ||
| Scan082 | Starter motor operation, detailing issues with armature sticking, tooth chipping, and improvements to the system. | ||
| View original record | -3- reduction gearing as good B.H.P. and efficiency as obtained on one of the first similar motors on the spindle. The motors on chassis are giving good power and starting torque and running nicely as… | ||
| Scan083 | Spring fault causing slow armature return, and the cautious introduction and testing of new 'Y' springs. | ||
| View original record | -4- slight thump in on engagement, but the chief fault of this spring is that it does not get the armature to return quickly enough when the engine starts and there is a whirr whilst the motor is spun… | ||
| Scan084 | Report comparing 'Y' and 'Z' springs for a starter system, detailing test rig observations and criticisms of the system. | ||
| View original record | -5- | | Initial force in position of rest. | Force at position of entry | Final force in full engagement. | |---|---|---|---| | Z. spring | 5.94 | 6.41 | 8.03 | | Y. spring | 6.07 | 7.34 | 11.61 | The… | ||
| Scan085 | Potential vulnerabilities of a push-button starter system, specifically regarding the Phantom II model. | ||
| View original record | -6- our EFC1/AD27.7.29. We know of no evidence as yet from Phantom II to suggest that this is necessary, but at the same time feel somewhat apprehensive as to the consequences of the absence of such a… | ||
| Scan086 | Recommendations for a limiting torque device, a teazer circuit breaker, and an air friction damper. | ||
| View original record | -7- we are of the opinion that a suitable limiting torque device should be considered in anticipation of the possibility of this becoming necessary. Also we strongly recommend the incorporation of… | ||
| Scan087 | On Phantom II suspension tests regarding radiator 'jellying' and the effects of different front spring stiffness. | ||
| View original record | To R. From Hs/Rn. (Held up). c. to Wor. Da. c. to R. NS. c. to Hn. Sy. ORIGINAL Hs/Rn.2/MJ.12. X7410 PHANTOM II SUSPENSION. During our recent tests on radiator 'jellying' we had occasion to fit 25%… | ||
| Scan088 | Attached print concerning the clanking of a brake mechanism. | ||
| View original record | To R. from Hs/Rn. C. Sg. C. Da. C. Ey. OY. ORIGINAL X7420 X7370 X5420. X5370 Hs/Rn4/AM5.10.29. CLANKING OF BRAKE MECHANISM. Please find attached print mentioned in paragraph two line two of… | ||
| Scan089 | Blueprint showing experiments and a proposal to cure 'servo clank' in a braking system. | ||
| View original record | S.K. 346. I STANDARD NORMAL MOVEMENT TO APPLY REAR BRAKES IS SLIGHTLY LESS THAN MOVEMENT TO APPLY FRONT. i.e. CENTRE OF ROTATION OF T LEVER IS AT POINT A. CLANK OCCURS. BY SETTING UP FRONT BRAKES… | ||
| Scan090 | List of recommended improved parts to be incorporated into the Phantom II production. | ||
| View original record | To R. From Hs. c. Sg. c. Wor. E. c. Da. By. ORIGINAL HSG/AD15.10.29. x7770 x7600 x7830 x7940@ x7250 x7520 x7950. x3806. PHANTOM II There are a number of improved parts which we recommend should be… | ||
| Scan091 | Proposed modifications for spare wheel carriers, radiator filters, central lubrication, and radiator shape. | ||
| View original record | -2- (10) Spare wheel carrier and luggage grid. It would appear that the majority of cars will have one wheel at the back and luggage grid, and one wheel at the side. We consider the present scheme of… | ||
| Scan092 | Customer complaints about noisy shock absorbers and potential remedies. | ||
| View original record | -3- (14) Shock absorbers. We are still receiving a number of complaints from customers as regards noisy shock absorbers. It has been proved that a small amount of slack in the joints of the shock… | ||
| Scan093 | The development and testing of an expanding carburetter on a Standard Phantom I engine. | ||
| View original record | To R. from Hs/ACL. c. Sg. c. Wor. E. c. Da. By. HS/ACL1/AD21.10.29. X7080 R.R. EXPANDING CARBURETTER. Further work has been carried out on the R.R. expanding carburetter, and together with the later… | ||
| Scan094 | Page 2 of a report detailing experiments and comparisons between different carburetter and choke configurations. | ||
| View original record | -2- This we considered, was evidence that the larger restrictor employed with the larger choke was restricting the air flow to the choke. We then removed the two inner walls of the float chamber so as… | ||
| Scan095 | Analysis of carburetter experiments comparing power output and pressure restoration with different jet and choke configurations. | ||
| View original record | -3- standpipe for an ordinary jet made from the diffuser tube of an "F" engine carburetter. No emulsion air was admitted and the fuel was sprayed from holes in the top of the tube. The free choke… | ||
| Scan096 | Carburetter modifications involving the choke, restrictor, and float chamber to improve engine power. | ||
| View original record | -4- old four port Phantom with full silencer system and are consequently lower than we are at present accustomed to on the S.S. engines. With the enlarged choke and restrictor, we found that removal… | ||
| Scan097 | Carburetor parts testing, discussing the jet needle taper, metering, and issues with mixture spraying from the choke walls. | ||
| View original record | -5- output is good - not being too ambitious at the start - we intend to proportion the taper of the jet needle to give the required metering. We hope to have this done very soon and report on its… | ||
| Scan098 | Graph of power curves comparing carburetor experiments on a Standard Phantom engine. | ||
| View original record | EXPANDING CHOKE CARB. EXPTS. POWER CURVES ON STD PHANTOM ENGINE. R.R. EXPANDING CHOKE CARB CHOKE DIA = AND FLOAT CHAMBER WALLS REMOVED. COMPARISON WITH RRCH HAVING 1.53 DIA CHOKE AND STD PHANTOM CARS.… | ||
| Scan099 | Blank document page with a purple ink stamp from the Print Room. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM 21 OCT 1929 DERBY. | ||
| Scan100 | Performance graph comparing two configurations of an expanding choke carburettor based on RPM. | ||
| View original record | EXPANDING CHOKE CARB. EXPTS. SOLID LINE: EXPANDING CARB WITH RESTRICTOR REMOVED AND CENTRAL JET PUT IN ITS PLACE GIVING FREE CHOKE AREA OF 1.400 □" DASHED LINE: EXPANDING CARB WITH RESTRICTOR GIVING A… | ||
| Scan101 | Mostly blank document with a date stamp. | ||
| View original record | 21 OCT 1929 | ||
| Scan102 | Experiments with an exhaust-heated hot spot on a Phantom II engine. | ||
| View original record | To R. from Hs/ACL. c. Sg. c. Wor. E. c. Da. By. Hs/ACL4/AD23.10.29. x7080 x7230. PHANTOM II EXHAUST HEATED HOT SPOT. We have carried out a number of experiments with exhaust heating to the hot spot… | ||
| Scan103 | Engine temperature testing, comparing road test results and suggesting improvements to the hot spot system. | ||
| View original record | -2- The temperature recorded during this test are considerably higher than encountered on a road test, the max. road test temperature being approx. 300°C. The arrangement was slightly different for… | ||
| Scan104 | Power curve graph for Engine No. SS 15, showing brake horse power vs RPM for an exhaust heated hot-spot system. | ||
| View original record | POWER CURVE (EXHAUST HEATED HOT-SPOT) ENGINE No. SS 15 STANDARD INDUCTION SYSTEM EXCEPT FOR HOT-SPOT CAR TYPE SILENCER HOT-SPOT EXHAUSTS INTO ATMOSPHERE BRAKE HORSE POWER STD. WATER HEATED HOT-SPOT… | ||
| Scan105 | Blank document with a 'ROYCE, LIMITED' date stamp. | ||
| View original record | ROYCE, LIMITED ROOM, 23 OCT 1929 | ||
| Scan106 | Blueprint for an Exhaust Hot Spot Silencer. | ||
| View original record | V.721. BLANK WELDED ON. DRILL 30 HOLES .250 DIA. IN ROWS OF 3, STAGGERED AS SHOWN. EXHAUST HOT SPOT SILENCER. WELD WHERE MARKED "A". MATERIAL: SHEET STEEL 16 S.W.G. SILENCER TO BE LAGGED IN NORMAL… | ||
| Scan107 | Reverse side of a document with a date stamp. | ||
| View original record | LIMITED ROOM, 23 OCT 1929 RBY. L | ||
| Scan108 | Adjustment of ignition contact breakers. | ||
| View original record | To R. from EFC. c. Sg. c. Hy. ORIGINAL EFC7/AD31.10.29. X 4041. IGNITION CONTACT BREAKER ADJUSTMENT The majority of other makes of battery ignition contact breakers now employ an eccentric adjustment… | ||
| Scan109 | Comparison of power output and detonation for 116° and 110° camshafts on the 'China' engine. | ||
| View original record | To R. from HS/ACL. c. SS. c. Sor. E. c. Da. BY. HS/ACL2/AD5.11.29. x5771. x5090. "CHINA" ENGINE - CAMSHAFT COMPARISONS ON THE HIGHER OUTPUT ENGINE. We have completed a test on the China engine… | ||
| Scan110 | Camshaft performance comparison, compression ratios, engine detonation, and testing of a large bore turbulent head 'China' engine. | ||
| View original record | Hs/ACL/AD5.11.29 contd. -2- found that the 115° was the better camshaft if each were compared in conjunction with a compression ratio having a similar margin from detonations at low speeds. It might… | ||
| Scan111 | Graph comparing the open exhaust power curves of a 116° camshaft versus a standard 110° camshaft for a 'China' engine. | ||
| View original record | V.739 CHINA ENGINE - CAMSHAFT COMPARISONS ON THE HIGHER OUTPUT ENGINE. OPEN EXHAUST POWER CURVES. ENGINE DETAILS:- COMPN. RATIO 5.25/1. LARGER EX & IN VALVES & PORTS. 4G LARGER POMPR CARB. CYL BLOCK… | ||
| Scan112 | Stamped document from the Print Room in Derby. | ||
| View original record | ROLLS-ROYCE, PRINT ROOM, 5 NOV 1929, DERBY | ||
| Scan113 | Analysis of pedal travel and brake performance issues for the Phantom II S.S. brakes. | ||
| View original record | To R. from Hs/an. c. SS. c. HJr. E. c. Da. Ey. Hs/Rn2/AD6.11.29. PHANTOM II. BRAKES. X7420 One or two points have been raised from time to time with regard to the S.S. brakes which we think merit… | ||
| Scan114 | Brake pedal travel issues and recommending a modification to the direct braking linkage. | ||
| View original record | HS/RH2/AD6.11.29 contd. -2- It is therefore apparent that for touring work in hilly country an owner would be justified in considering that his brakes required adjustment when he had worn only .010… | ||
| Scan115 | Brake adjustments, wear on brake shoes and linings, and changes to lining materials. | ||
| View original record | -3- actually 22-EX ran a 10,000 miles test with this reduced direct braking and the cam angle altered to restore the total units. (2) The adjustment provided is too coarse and cannot be used until the… | ||
| Scan116 | Analysis of brake shoe wear, toggle adjustments, and a comparison of brake lining areas between the 20 HP, 40/50 HP, and Phantom models. | ||
| View original record | -4- Hs/Rm2/AD6.11.23 contd. thrown away on the side by side rear axle is .207. This corresponds roughly with the theoretical 5 notches wear at the shoe centre equalling .095". [Diagram showing… | ||
| Scan117 | Specifications for future car brake systems, focusing on brake area and liner thickness. | ||
| View original record | He/am2/AD6.11.29 contd. -5- should be used as previously outlined. Future Cars. That the rear foot brake area should be twice that of the hand brake as on the 20 HP. That all liners should be made… | ||
| Scan118 | The power output of an expanding carburetter tested on a Phantom II engine. | ||
| View original record | To R. from HS/ACL. c. Sg. c. Wor. E. c. Da. Ey. Hs/ACLA/AD5.11.29. X7080 R.R. EXPANDING CARBURETTER - POWER OUTPUT ON PHANTOM II ENGINE. Most of the work on the Expanding Choke Carburetter has been… | ||
| Scan119 | Progress report on solving a metering problem by testing combinations of needle taper, diffuser, and air piston spring. | ||
| View original record | HS/ACL/AD5.11.29. contd. -2- needle taper. Now we have shewn that the power output is good we are working on the metering problem i.e. the right combination of needle taper, diffuser air piston… | ||
| Scan120 | Graph comparing the power output of an expanding choke carburettor versus a standard Phantom carburettor on a Phantom III engine with open exhaust. | ||
| View original record | V740 POWER OUTPUT WITH EXPANDING CHOKE CARB. COMPARED WITH STD PHANTOM CARB. ON A PHANTOM III ENGINE. OPEN EXHAUST. B.H.P. EXP. CHOKE CARB. STD PHANTOM CARB. R.P.M. CWH 4/11/29 | ||
| Scan121 | Blank document page with a 'Print Room' stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 5 NOV 1929 | ||
| Scan122 | Difficulties with the starter protection arrangement for the Phantom II production model. | ||
| View original record | To R. from AFC. c.c. SG. Ry. c.c. E. By. c.c. Hs. C. c.c. Da. Da/EV. APO6/ADS.11.29. X7655 STARTER PROTECTION. YOUR R2/M31.10.29. The suggested arrangement appears to be as in Figure 1. There is,… | ||
| Scan123 | Continued discussion on an alternative arrangement for an ignition switch and green lamp earthing. | ||
| View original record | -2- finer to a one gauge/primary winding, and so reducing the actuating current. This may be more worth while should we adopt the suggested scheme. An alternative arrangement which we venture to… | ||
| Scan124 | Wiring diagram comparing two different ignition and starter actuation circuits. | ||
| View original record | FIGURE 1. Battery positive Emergency fuse. Ammeter Ignition switch in switchbox Ignition fuse. Ballast resistance Ignition coil. Contact breaker. Oil operated contacts P.B. switch Green lamp. Starter… | ||
| Scan125 | Analysis of decreasing petrol flow rates to the carburettor caused by various system obstructions. | ||
| View original record | To R. from Hs/an. c. Sg. c. Wor. E. c. Da. By. ORIGINAL Return to Rm Seen by Nov 13 29 Hs/an2/ADT.11.23. PATROL SUPPLY TO CARBURETTER. We have only just sufficient petrol supply in the float chamber… | ||
| Scan126 | Analysis of fuel delivery rates and flow obstructions related to banjo unions and needle valves. | ||
| View original record | -2- Hs/3m2/AD7.11.29 contd. State of Supply Delivery Pts/Hr. (5) Banjo coupled up. Delivery taken through bottom of valve seat unit (G in sketch) 59 pts/hr. (6) As (5) but delivery taken through… | ||
| Scan127 | Data table comparing delivery values through a needle valve under different configurations. | ||
| View original record | | | Standard Conditions | With largest banjo reasonable cross holes drilled out to suit. | With straight through type nut & nipple. | |---|---|---|---| | Delivery through needle valve. | 75.0 | 76.7 |… | ||
| Scan128 | Needle valve and fuel flow tests with recommendations for improvement. | ||
| View original record | -3- of the needle valve seat because we get no improvement when we open up dia x. from .218 to .312. We also tried under-cutting the seat to reduce the length of the narrow bore (Hs.221) but this… | ||
| Scan129 | Table comparing flow rates in pints per hour for standard and modified filters under two different conditions. | ||
| View original record | Hs/Rn2/AD7.11.29 contd. -4- | | Standard filter | Modified filter | |---|---|---| | Flow from banjo condition (2) | 97.5 pts/hr. | 110 pts/hr. | | Flow through needle valve condition (7) | 75 pts/hr.… | ||
| Scan130 | Blueprint detailing a nipple used for petrol flow tests. | ||
| View original record | Hs 243 6-11-29 .750 .187 .125 .375 DIA .325 DIA 8° .250 DIA .400 DIA .200 NIPPLE USED FOR PETROL FLOW TESTS - S.S. MADE FROM F.479. NUT E51307 OPENED OUT .375DIA TO ADMIT NIPPLE. THESE WERE MADE TO… | ||
| Scan131 | Blueprint with dimensions of a 'larger' banjo used on petrol flow tests, supplied with Zenith petrol filters. | ||
| View original record | HS 244 6-11-29 .675 DIA .400 DIA .312 DIA .280 .480 .120 .480 DIA .775 DIA OF UNDERCUT .500 .440 DIA .950 DIA DIMENSIONS OF 'LARGER' BANJO USED ON PETROL FLOW TESTS - S.S. SUPPLIED WITH ZENITH PETROL… | ||
| Scan132 | Blueprint drawing of a modification to part E76531 for petrol flow tests. | ||
| View original record | HS 241 O/N 54785 21-10-29 .300 ±10 1.387 -10 .2187 DIA X MODIFICATION TO E76531 PETROL FLOW TESTS ROLLS-ROYCE, LIMITED 7 NOV 1929 | ||
| Scan133 | Blueprint diagram showing various points for measuring S.S. petrol flow tests on a valve and banjo union. | ||
| View original record | 23-10-29 NEEDLE VALVE REMOVED. DELIVERY E. NEEDLE VALVE IN POSITION DELIVERY. A E 76531 ES1202 E50237 DELIVERY THROUGH BANJO C DELIVERY H DELIVERY THROUGH BOTTOM OF BANJO UNION OR VALVE SEATING… | ||
| Scan134 | Different lubrication schemes for the Phantom I cantilever spring and trials with American shock absorbers. | ||
| View original record | To R. From Hs/Rn. c. Sg. c. Wor. E. c. Da. Ry. Hs/3m4/ADL1.11.29. x8410. PHANTOM I SPRINGING We have tried out two schemes of lubricating the cantilever spring in conjunction with the Repair Dept. one… | ||
| Scan135 | Spring lubrication, American type dampers, and specifications for shock absorber loading. | ||
| View original record | -2- it is absolutely necessary for the spring to be lubricated to get good results. The complaints which the lubricated spring and the American type dampers sure demand the minimum of friction in the… | ||
| Scan136 | Diagram illustrating modifications to a cantilever spring for the purpose of lubricating the ends of its leaves. | ||
| View original record | DRILL .234 DIA. SECTION THRO' SPRING EYE SCALE 1/1 30° 1.250 DIA. CUTTER 2.600 .125 2.625 2.875 17.300 20.300 23.175 VIEW OF OIL GROOVES. SCALE 1/1. .500 1.0 .025 .050 45° 2 HOLES .156 DIA. 1.875 .156… | ||
| Scan137 | Detailed diagram of a centrally lubricated cantilever spring assembly. | ||
| View original record | No, OPERATION, MACHINE, TOOL, TOOL No, R2103 RR.7711(SH)(D.G.134 15-5-29) N & C. LTD COUNTERSINK 3RD PLATE .750 DIA BANJO TO BE SWUNG ROUND TO THE MOST CONVENIENT POSITION. .750, .625, 3.000, 1.750… | ||
| Scan138 | Comparison of a 116° camshaft against a standard 110° camshaft on a standard China engine, detailing performance differences. | ||
| View original record | To R. from Hs/ACL. c.c. Sg. c. Wor. E. c. Da. By. ORIGINAL Hs/ACL9/AD12.11.29. X5771- X5090. 116° CAMSHAFT ON STANDARD CHINA ENGINE. We have compared the 116° camshaft (E.55362) with the Std. 110°… | ||
| Scan139 | The preference for a standard camshaft over a 116° camshaft under certain conditions. | ||
| View original record | HS/ACL9/ADL2.11.29 contd. -2- the benefit. Therefore where conditions are such that the 116° camshaft does not give its best at max. speed - due to valves, ports or induction system - it would seem… | ||
| Scan140 | Performance comparison graph and valve timing data for two different camshafts on a 'China' engine. | ||
| View original record | CAMSHAFT COMPARISON (STD. "CHINA" ENGINE) ENGINE No GOS-C5 (3.250" BORE). COMPRESSION RATIO = 4.75. STANDARD INDUCTION SYSTEM. STANDARD 20H.P. CARBURETTOR. OPEN EXHAUST. Graph Axes: Left… | ||
| Scan141 | Stamped document cover page with two punch holes on the right. | ||
| View original record | LIMITED 12 NOV 1929 DERBY | ||
| Scan142 | The road test of a cast aluminium silencer and front expansion chamber on car 20-EX. | ||
| View original record | To R. from Hs/AJL. c. to Sg. c. to Wor. c. to E. c. to Da. c. to BY. ORIGINAL X7230. X442 Hs/AJL1/BB12.11.29. CAST ALUMINIUM SILENCER - 'N' SCH: 2931-35 2947. The exhaust system with a cast aluminium… | ||
| Scan143 | Modifying an exhaust system to reduce spitting and booming noises. | ||
| View original record | (2) Hs/AJL1/BE12.11.29. Spitting noises are not improved by using this front expansion chamber. To improve it we suggest trying a cast aluminium rear end piece in place of the sheetmetal one… | ||
| Scan144 | Brake leverage recommendations, testing, and the effects of wear. | ||
| View original record | To R. from Hs/An. c. Sg. c. Wor. E. c. Da. By. ORIGINAL Hs/AnS/ADL2.11.29. BRAKE LEVERAGES. X7260 The brake leverage that we recommend is [Diagram of a brake leverage system with values '35° Cams' and… | ||
| Scan145 | Production of a reduced direct braking system and the testing of brake shoe clearance. | ||
| View original record | Hs/RmS/AD12.11.29 contd. -2- We should like to bring the reduced direct braking on production as soon as possible, though the Test Dept. are happier now that they are working to the minimum initial… | ||
| Scan146 | The lubrication issues of the Phantom II S.S. clutch, detailing modifications and test results. | ||
| View original record | To R. from Hs/Tsn. c. Sg. c. Wor. E. c. Da. Ay. ORIGINAL Hs/TsnL/AD13.11.29. LUBRICATION OF S.S. CLUTCH. X872 We have found experimentally that if the Phantom II clutch be assembled dry and then oiled… | ||
| Scan147 | Clutch and ball bearing tests concerning oiling issues and proposed modifications. | ||
| View original record | Hs/Tsnl/AHS.13.11.29 contd. -2- the front ball bearing, and that a lot more had to be put in to make it come out at the rear bearing. We also did a test with and without the collector ring for the oil… | ||
| Scan148 | Continued document discussing lubrication scheme modifications and production changes for a coupling shaft. | ||
| View original record | Hs/Tsnl/AD13.11.29 contd. -3- However, we recommend the above lubrication scheme as safe and fool-proof. As a temporary expedient the following two modifications are being carried out on production :-… | ||
| Scan149 | Cross-section blueprint of a mechanical component with a handwritten production modification. | ||
| View original record | 4 HOLES LIKE THIS NOW ON PRODUCTION Ten. 8/11/29 | ||
| Scan150 | Blank page with a Print Room date stamp. | ||
| View original record | ROLLS-ROYCE, LTD. PRINT ROOM 13 NOV 1929 | ||
| Scan151 | Bench endurance test report on S.S. sequence starter units, comparing a new 'Y' type spring with the standard 'Z' spring. | ||
| View original record | To R. from EFC. c. Sg. c. Wor. E. c. Da. Ry. ORIGINAL EFC2/AM 3.11.29. X.7655. S.S. SEQUENCE STARTER UNITS. X7655 BENCH ENDURANCE TEST. We have completed an endurance test of S.S. starter apparatus on… | ||
| Scan152 | Endurance test report on electrical starter units, detailing a 40,000 cycle push-button test. | ||
| View original record | EFC2/AD13.11.29 contd. -2- Reverting to the endurance test of the electrical units, my assistant's report WD.87. on this contains the following :- "The test consisted of starting up by means of the… | ||
| Scan153 | Continuation page of a report on starter systems, with plans for further observation on experimental cars. | ||
| View original record | EFC2/AH3.11.29 contd. -3- circumstances of operation being considerably different from those experienced in actual working. We will report later in this direction on observation of starter systems on… | ||
| Scan154 | The condition of an S.S. starter motor after 8,600 miles of use on an experimental chassis. | ||
| View original record | To R. from EFC. c. Sg. c. Wor. E. d. Da. Ry. ORIGINAL EFC3/AD13.11.29. X.7625. S.S. STARTER MOTOR. X7625 Further to my EFC2/AD13.11.29, I have now to hand a report AD.42, relating to the condition of… | ||
| Scan155 | Test report on the performance of new Invar pistons for the Phantom II engine. | ||
| View original record | To R. C. Sc. C. Wor. C. E. C. Da. C. BY. ORIGINAL 1 copy HS/ACL/H.13.11.29. X7090 X1506 X7040 Re: INVAR PISTONS - PHANTOM II. We have run a set of Invar pistons L6C2729/30 for 10 hours on a Phantom II… | ||
| Scan156 | Comparing a standard Phantom II crankshaft with a new, stiffer version (E.79351) with large pins, analysing changes in torsional period, inertia, weight, and high-speed vibrations. | ||
| View original record | To R. c. Sg. c. Wor. c. Rg. c. E. c. BY. ORIGINAL file K7010 Hs/Ten/H.14.11.29. Re: PHANTOM II CRANKSHAFT WITH LARGE PINS E.79351. The torsional period of a standard Phantom II car is 3600 R.P.M., and… | ||
| Scan157 | The test results of a nitro alloy water pump spindle. | ||
| View original record | To R. from Hs/GWH. c. SG. c. Wor. E. c. Da. By. ORIGINAL HS/GWH2/AM5.11.29. x7150 x7180 REPORT ON NITRO ALLOY WATER PUMP SPINDLE A nitro alloy spindle was fitted in the water pump on 22-EX and has… | ||
| Scan158 | Noise issue with the exhaust heated hot spot on the Phantom II model. | ||
| View original record | To R. from Hs. C. [Struck through text] c. [Struck through text] e. [Struck through text] ORIGINAL Hs2/A016.11.29. x7080. x7230. x7772. EXHAUST HEATED HOT SPOT - PHANTOM II. Carb. & Exhaust. We are in… | ||
| Scan159 | Visit to the Dunlop Rubber Company regarding tyre design, focusing on the 'Silent Tread' tyre's safety and adhesion. | ||
| View original record | To R. from Hs/ c. Sg. c. Wor. E. c. Da. By. ORIGINAL Hs/AHL6.11.29. X4050. VISIT TO THE DUNLOP RUBBER CO. We paid a visit to the Dunlop Rubber Co. to discuss the question of tyres. We have been… | ||
| Scan160 | Tyre performance, tread patterns, and non-skidding qualities for various car models. | ||
| View original record | -2- In this respect the latest 20 HP. 6" tyre for the 19" rim is worse off than the 6.75" tyre for the 21" rim that we originally standardized on the 40/50 HP. as the original Silent tread pattern.… | ||
| Scan161 | Continuation page discussing Dunlop list availability for 20 HP standard sizes. | ||
| View original record | Hs/Rml/AD16.11.29 contd. -3- ailable in the current Dunlop list in both d 20 HP. standard sizes. Hs/Rm. | ||
| Scan162 | Customer suggestion to connect the red warning lamp to the starter carburettor for Phantom cars. | ||
| View original record | To R. from Hs. c. Sg. c. Wor. E. c. Da. By. Hs2/AD18.11.29. x7280. STARTER CARBURETTOR FOR PHANTOM CARS. We have received a suggestion from one of our customers which we consider is worthy of… | ||
| Scan163 | Design and experimentation of an oil pressure-operated switch for starter protection. | ||
| View original record | To R. from EFC. c. Sg. c. Hy. c. Hs. c. C. ORIGINAL EFCL/AD19.11.29. STARTER PROTECTION. X7655. We look upon this as important and are correspondingly anxious to experiment on the lines you have… | ||
| Scan164 | Modifications to a starter motor actuating circuit and ignition fuse tapping point. | ||
| View original record | EFC1/AM9.11.29 contd. -2- of the green lamp indicator is lost and we only get advantages (1) and (4) of your R2/M11.11.29 in the scheme which is otherwise like Fig.1. and only advantage (1) in Fig.2.… | ||
| Scan165 | Typed memo discussing a suggestion for a switch connected to a gear lever. | ||
| View original record | EFC1/AD19.11.29. contd. -3- a switch connected to the gear lever in such a manner as to be "on" when the lever was in neutral. I do not know whether that arrangement would be considered to be any… | ||
| Scan166 | Phantom II brakes, explaining why certain levers cannot be shortened or lengthened and questioning an objection to 35° cams. | ||
| View original record | ORIGINAL To Da. from Hs/Rm. c. By. Hs/Rm2/AD23.11.29. x7360 x7420 PHANTOM II BRAKES. With reference to Dal/M.8.11.29. As By. points out, we cannot shorten the lever you suggest, as if we do the rod… | ||
| Scan167 | The testing and performance of chassis ammeters from the Park Royal Co. | ||
| View original record | To R. from EFC. c. Sg. c. Wor. E. c. Ds. Ry. EFC1/AD27.11.29. X4670 X4622 X3498 CHASSIS AMMETERS. A sample 20-0-20 chassis ammeter made by the Park Royal Co. and received on 16.6.27, ran 20,045 miles… | ||
| Scan168 | Comparing the performance of Ferranti and Park Royal chassis ammeters. | ||
| View original record | EFC/AD27.11.39 contd. -2- for complaints of sticking. We have also on test on an experimental car, a sample Ferranti chassis ammeter, the second sample we have had. The first had to be returned for a… | ||
| Scan169 | Insufficiency of the standard dynamo and the development of a higher output version for the 20 HP and Phantom II models. | ||
| View original record | To R. from EFC. c. Sg. c. WOr. BV. c. Hs. PN. ORIGINAL EFC3/AD28.11.29. X5663 X7660 X8664 X5661. X.5664. X.8665. DYNAMO OUTPUT 20 HP. AND PHANTOM II. REF: R1/V16.11.29 and R1/M21.11.29. It is agreed… | ||
| Scan170 | The development and characteristics of intermediate, major, and minor output dynamos. | ||
| View original record | EFC3/AD28.11.29 contd. -2- reported. A number of these machines have been supplied to clients in special cases. They were initiated as a result of our report EFC3/T27.2.28 and your memo R5/M9.3.28. As… | ||
| Scan171 | 20 HP case tests for dynamo output and considerations for experimental cars. | ||
| View original record | EFC3/AD28.11.29 contd. -3- In the 20 HP. case tests so far indicate that whereas the cutting in and minor output can be suitable and as described for the Phantom case, the possible major output will… | ||
| Scan172 | Design evolution and issues of the Phantom II switchbox and distribution board. | ||
| View original record | To R. from EFC. c. Sg. E. c. By. Wor. ORIGINAL EPCL/AD30.11.29. X7730 PHANTOM II SWITCHBOX, DISTRIBUTION BOARD AND FUSES. The first switchboxes made for experimental S.S. chassis were of the type with… | ||
| Scan173 | Analysis of a switchbox's condition after 27,700 miles and considerations for its future use on an experimental car. | ||
| View original record | EEC1/AD30.11.29 contd. -2- "This switchbox has run 27,700 miles fitted with blade chamfered to give field break first. It has now been removed for disposal of the car. The field contact fingers are… | ||
| Scan174 | Recommendation concerning the fuse and switchbox configuration for the Phantom II standard. | ||
| View original record | EFC/AD20.11.29 contd. -3- the cut-out shunt coil, now supplied from the field fuse terminal, was originally supplied from the armature fuse terminal. On the long distribution board with incorporated… | ||
| Scan175 | The performance and testing of a Sleevless Type R.C.2 Magneto for 20 HP cars. | ||
| View original record | To R. from EFC. c. Sg. c. Wor. E. c. Da. Ey. Roy. ORIGINAL EFC2/AD4.12.29. X5792. X.5792. SLEEVLESS TYPE R.C.2. MAGNETO FOR 20 HP. Further to our EFC2/AD1.10.29, one of these magnetos No.120263 is… | ||
| Scan176 | Alternative ignition systems for the 20 HP and Phantom II models, proposing a standby ignition coil. | ||
| View original record | AFC2/AD4.12.29 contd. -2- standardisation as early as is reasonably possible. We have the impression that the provision on the 20 HP. of complete dual ignition as on the Phantom II has been given some… | ||
| Scan177 | Continued memorandum on ignition systems, discussing batteries, magnetos, and the benefits of in-house design. | ||
| View original record | EFC2/AM.12.29 contd. -3- permanently connected to the distributor and each coil when not on duty would be "floating" on the high tension lead. It has been confirmed by trial on the bench that this… | ||
| Scan178 | The performance of the dynamo battery system in relation to demand for the Phantom II and 20 HP models. | ||
| View original record | To R. from LFC. c. Sg. c. Wor. E. c. De. PN. Ry. ORIGINAL. EFC2/AD14.12.29. X294 X5664 X8665 X8780 PERFORMANCE OF DYNAMO BATTERY SYSTEM IN RELATION TO DEMAND. References R1/M21.11.29, FN1/WT2.12.29,… | ||
| Scan179 | Dynamo output limitations, heating issues, safety margins, and design improvements. | ||
| View original record | EC2/AD14.12.29 contd. -2- control, the great limitation of output as mainly determined by control brush setting, is that of armature heating with the dynamo running approximately continuously at such… | ||
| Scan180 | Quoting Mr. Peat's memo on dynamo requirements for driving conditions in Australia. | ||
| View original record | EFC2/AD14.12.28 contd. -3- Mr.Peat's memos concerning the higher output dynamo, dated 4.7.28. still exists :- "As a matter of fact I do not think the type of dynamo mentioned (in paragraph a) would be… | ||
| Scan181 | Dynamo cut-in speed and the instability of the dynamo-battery-load system. | ||
| View original record | LFC2/AD14.12.29 contd. -4- We consequently recommend that we should be cautious in too far increasing the road speed at which dynamo cut-in occurs. It will be gathered from the above that in our… | ||
| Scan182 | Battery charging issues, starter consumption, and potential solutions involving dynamo control. | ||
| View original record | EFC2/AM4.12.29 contd. -5- Further, lamp consumption and particularly starter consumption is not reduced proportionally and the rate of loss of charge of the battery is accelerated. Particularly is… | ||
| Scan183 | Description of four different output curves for a 20 HP dynamo, detailing the conditions under which the measurements were taken. | ||
| View original record | EFC2/AMA.12.29 contd. -6- The curves shown on the blue print for 20 HP. comprise :- Firstly, our original specified curve of output requirements of 20 HP. dynamo. Secondly, the representative output… | ||
| Scan184 | Report analysing the performance curves of a dynamo, particularly its intermediate output, for different vehicle models. | ||
| View original record | -7- It will be noted that the intermediate output curve is quite a good curve with the exception of its rate of fall at high speeds which is rather more than in the other two cases. This point is… | ||
| Scan185 | Comparison of representative output curves for different Phantom I and Phantom II armature machines. | ||
| View original record | -8- Secondly, representative output curve of Phantom I standard 57 coil 29 slot armature machine (Labelled 1). Thirdly, representative output curve of Phantom II 56 coil 28 slot thinner armature… | ||
| Scan186 | Modifying existing machine arrangements, specifically for 20 HP and Phantom II dynamos. | ||
| View original record | EFC2/A114.12.29 contd. -9- The question of modification of existing arrangements of machines to keep up the curve at high speeds rather higher than it is in some cases at present, is having… | ||
| Scan187 | Graph showing output curves for a 20 HP dynamo. | ||
| View original record | M. (High Output Armature) 7° 126° July '28 20 H.P. REPRESENTATIVE OUTPUT CURVE OF STANDARD 20HP DYNAMO AT 80°C SPECIFIED CURVE OF OUTPUT REQUIREMENTS - FOR 20 HP DYNAMO 20 H.P. DYNAMO OUTPUT CURVES… | ||
| Scan188 | Blank cover or separator page with a print room stamp. | ||
| View original record | ROLLS-ROYCE LIMITED PRINT ROOM, 19 DEC 1929 DERBY. | ||
| Scan189 | Graph showing dynamo output curves for a 40/50 HP model. | ||
| View original record | AMPERE OUTPUT OPERATING VOLTAGES 40/50 H.P. DYNAMO OUTPUT CURVES DYNAMO R.P.M. PHANTOM II CHASSIS M.P.H. WITH 11/41 AXLE & 33.0" TYRE DIA: 1. REPRESENTATIVE CURVE OF NB STANDARD (29 SLOT ARMATURE)… | ||
| Scan190 | Blank page with a purple 'Print Room' stamp from Derby. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 19 DEC 1929 DERBY. | ||
| Scan191 | Advising against the use of Sodium Phosphate in radiators due to it causing water loss. | ||
| View original record | To R. From Hs. c.c. to Ss. HOr. c.c. to E. Ds. c.c. to Hy. Hs.2/WJ.2.12.29. X4576. SODIUM PHOSPHATE IN RADIATORS. We find that if we get any excess Sodium Phosphate in the radiator water that it will… | ||
| Scan192 | Proposing a visit to R.L. with two cars, including 16-EX, for a demonstration and trial by sales officials. | ||
| View original record | To W. S. Paris JBG. Cc W.R. 19/3/32. Cc A.G.E. AHE. Cc W.A.R. WRA. HSR/MAI.6.12.32. X1698. VISIT TO R.L. If convenient to you, we propose to visit R.L. on Wednesday next. We shall bring two cars (one… | ||
| Scan193 | The comparative testing of various H.T. ignition cables for standardisation on the chassis. | ||
| View original record | To R. from EFC. c. Sg. c. WOT. E. c. De. Ey. ORIGINAL. EFC4/ADG.12.29. X4473 X8561 X.4473. CHASSIS H.T. IGNITION CABLES. Just previous to the standardisation of Maconite H.T. ignition wires for the… | ||
| Scan194 | Report page detailing the results of physical and chemical tests on different dielectric cable materials. | ||
| View original record | EFC4/AD6.12.25. contd. -2- (A) Physical and chemical tests of the dielectric. (B) Electrical tests (C) Chassis and subsequent tests. The details of the tests under section (A) are as follows :- (1)… | ||
| Scan195 | The flammability and voltage breakdown tests of various electrical cable samples. | ||
| View original record | -3- Effect on Super Clover - none appreciably " " Helsby - slight softening. " " Maconite - none appreciably. All four samples ignited with the same degree of moderate inflammability when exposed to a… | ||
| Scan196 | Test results on the cracking and breakdown of different electrical cable insulations under high voltage and heat. | ||
| View original record | -4- (6) The cracking effect on the insulation brought about by high voltage oscillatory brush discharges passing along the surface of the insulation to earthed clips thereon. The test carried out over… | ||
| Scan197 | The mileage and electrical breakdown test results for various cable insulation types. | ||
| View original record | -5- EFC4/AD6.12.29 contd. "Samples of Gloverite and Super Glover were run over 10,000 miles on experimental Phantom I chassis 12-EX, and samples of Maconite and Helsby were run a second 10,000 miles… | ||
| Scan198 | Report comparing the performance and durability of different electrical cable types including Cloverite, Maconit and Helsby. | ||
| View original record | EFC4/ADS.12.29 contd. -6- cables were tested and in the case of the former make, one sample broke down after 1/2 min. at 19,300 volts R.M.S. and the other after 2 mins. at the same voltage, whilst… | ||
| Scan199 | Report comparing the quality and performance of different H.T. cables (Maconite, Gloverite, Super Glover) on Phantom I and Phantom II chassis. | ||
| View original record | EFC4/ADS.12.29 contd. -7- and reasonably as good as the Maconit. The surfaces however, of both Gloverite and Super Glover are rough as compared with Maconit which makes them difficult to draw through… | ||
| Scan200 | Issues with H.T. wires overheating due to proximity to the exhaust and ignition tubes, and a request for experimental samples of alternative cables. | ||
| View original record | EFC4/ADS.12.29. contd. -8- We know with a fair degree of certainty that this would apply equally with H.T. wires of Super Glover type. The wires are particularly affected where they pass through the… | ||
| Scan201 | Manufacturing merits of a splined taper versus a Woodruff key and taper for shock absorber shafts. | ||
| View original record | ORIGINAL To Da. From Hs/Rm. Hs/Rm.3/MJ.7.12.29. SHOCK ABSORBERS. X 7520. In our last memo we recommended a Woodruff key and taper for the shaft of the shock absorbers. On going over the question we… | ||
| Scan202 | Ignition wire tubing options for the Phantom II, comparing metal and bakelite tubes. | ||
| View original record | ORIGINAL To R. from EFC. c. Sg. c. EVr EFC1/AD9.12.29. PHANTOM II IGNITION WIRE TUBING. X7015 In connection with the suggested use of H.T. wires with varnished cambric covering referred to in our… | ||
| Scan203 | Tests and factors for addressing springing complaints on Phantom 1 cars, such as harsh low-speed riding and pitching. | ||
| View original record | To R. From Hs/en. c.c. to Ss. Mr. c.c. to Da. c.c. to Bv. L. ORIGINAL x x8770 x8005 x8840 x235 x8410 PHANTOM 1 SUSPENSION. In conjunction with the Repair Dept., we are carrying out tests continually… | ||
| Scan204 | Report discussing ride quality issues, such as pitching, and potential improvements using springs and shock absorbers. | ||
| View original record | -2- fabric body, however, is most difficult to deal with as it has a tendency to pitch over the whole running range. Such cars also ride harshly at low speeds. The higher the frequency of the pitching… | ||
| Scan205 | Suspension improvements including front springs, drilled valves, and issues with light fabric bodies on Phantom models. | ||
| View original record | -3- HS/AL.1/AL.10.12.29. Contd trying out some front springs having greater initial deflection and increased free camber. We anticipate that these may lower the frequency of the pitching speed which… | ||
| Scan206 | Use and history of drilled valves in hydraulic shock dampers. | ||
| View original record | To R. From Hs/Bn. c. to Ss. Dd. c. to E. BY. c. to Sor. Hs/Bn.6/MJ.10.12.29. x5520 x7520 x8520 HYDRAULIC SHOCK DAMPERS. With reference to R.3/M4.12.29. We note that you are at present working on shock… | ||
| Scan207 | Use of drilled valves and dampers on Phantom I and II models to improve ride quality and road holding. | ||
| View original record | -2- Hs/Rn.6/MJC.10.12.29. Contd. Though sufficient time has not yet elapsed to verify the point, we appear to have largely overcome the trouble by this means. On Phantom 1 the drilled valves have for… | ||
| Scan208 | Endurance testing of Watford EW6A magnetos with different contact points. | ||
| View original record | To R. from EFC. c. Sg. c. Ey. E. c. Da. Wor. Mx. ORIGINAL EFC1/AM6.12.29. X.7792. WATFORD EW6A MAGNETOS. X7792 Further to our EFC1/AD30.9.29. in which the detail results of an endurance test on a 66°… | ||
| Scan209 | Performance improvements and testing of magnetos with tungsten points. | ||
| View original record | -2- APC/ATR6.12.29 contd. It has been our firm conviction that Messrs. North could eventually produce an efficient magneto with tungsten points and we now have concrete proof in the shape of this… | ||
| Scan210 | Page 3 of a report detailing the results of a 200-hour endurance test on a magneto, including observations on performance and component wear. | ||
| View original record | -3- EFC1/AM6.12.29 contd. speed good but also the leak performance. The magneto is also now reasonably noiseless in operation, reliable and relatively inexpensive." We have now completed the endurance… | ||
| Scan211 | Magneto endurance tests, comparing contact point materials and discussing solutions for carbon dust accumulation. | ||
| View original record | EPCL/A16.12.29 contd. -4- points indicated negligible wear. This result is certainly remarkable and considerably better than those normally obtained with the standard iridio platinum points”. In… | ||
| Scan212 | The experimental use and cost analysis of tungsten points in chassis magnetos compared to standard platinum points. | ||
| View original record | EFC/AMS.16.12.29 contd. -5- in the general improvement of chassis magnetos, and we shall endeavour to get through the experimental stage as soon as possible of LW6A magnetos fitted with tungsten… | ||
| Scan213 | Standardisation of car dynamo armatures and charging arrangements. | ||
| View original record | FM. HS. FROM R. Copy to - SG. Copy to - WOR. Copy to - EFC. ORIGINAL CAR DYNAMO OUTPUT. Thank you for your memo. on car dynamo output. I hope you will be able to help EFC. to find which is the best of… | ||
| Scan214 | Tests of a 112° long duration camshaft for the 'China' engine. | ||
| View original record | To R. From He/ACL. c. to SG. OR. c. to L. Ja. c. to BY. x5090. x5770. 112° LONG DURATION CAMSHAFT (-CHINA-). Tests have now been carried out on the "China" engine with a long duration camshaft having… | ||
| Scan215 | Performance comparison graph of 110°, 112°, and 116° camshafts, plotting Brake Horse Power and BMEP against engine RPM. | ||
| View original record | 112° LONG DURATION CAMSHAFT (CHINA). V761. ENGINE N° Gos-C1. STANDARD INDUCTION PIPE. ENLARGED INDN PASSAGE THRO' BLOCK. 17% LARGER 20HP R.R. CARBURETTOR. COMPRESSION RATIO = 5.25. OPEN EXHAUST. 112°… | ||
| Scan216 | Blank document page with a Print Room date stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 20 DEC 1929 DERBY. | ||
| Scan217 | Tests conducted on an Air Silencer Carburetter S.S., detailing power loss and modifications. | ||
| View original record | To R. From Hs/ACL. C. to SG. WOT. C. to E. DA. C. HY. ORIGINAL x7080 x7770 AIR SILENCER CARBURETTER S.S. A number of tests have been carried out on the above carburetter (LEC.2734), and the… | ||
| Scan218 | Power loss caused by air-silencer and carburetter modifications. | ||
| View original record | -2- of the cowling around the air-valve ports. The curve V.758 shews the power loss caused by this cowling, which amounts to 3.0% at 2500 R.P.M. Since fitting the standard air-valve, diaphragm and… | ||
| Scan219 | Suggested modifications to a silencer and carburetter to improve performance and reduce noise. | ||
| View original record | -3- The aforementioned modifications are thought to be the most that can be done to the existing parts, as the air flow is restricted at the air valve ports and the annular spaces between the… | ||
| Scan220 | Graph comparing Brake Horse Power vs RPM for different Air Silencer Carburettor configurations on Engine No SS-7. | ||
| View original record | 6-12-29 V757. Air Silencer Carburettor (Le C. 2734). ENGINE No SS-7. STANDARD INDUCTION MANIFOLD. OPEN EXHAUST. BRAKE HORSE POWER STANDARD CARB. MODIFIED AIR SILENCER CARB. (STD AIR VALVE & H.S.… | ||
| Scan221 | Blank document page with a 'Print Room, Derby' date stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 20 DEC 1929 DERBY. | ||
| Scan222 | Graph plotting Brake Horse Power against RPM to show the development of an Air Silencer Carburettor. | ||
| View original record | AIR SILENCER CARB. DEVOLOPEMENT. ① ENGINE No SS-7. STANDARD INDn PIPE. OPEN EXHAUST. STANDARD CARB. BRAKE HORSE POWER R.P.M. OF ENGINE. CURVE Ⓑ: AIR SILENCER CARB (L.C. 2734), FITTED WITH A STD. AIR… | ||
| Scan223 | Blank page with a purple 'Print Room' stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 20 DEC 1929 DERBY. | ||
| Scan224 | Graph analyzing engine power losses from various air silencer carburettor configurations. | ||
| View original record | 9-12-29 AIR SILENCER CARB. DEVOLOPEMENT ② V759 ANALYSIS OF SILENCER LOSSES. ENGINE N° S.S.-7. STD. INDUCTION PIPE OPEN EXHAUST. STANDARD CARB. BRAKE HORSE POWER. R.P.M. OF ENGINE CURVE Ⓐ: AIR SILENCER… | ||
| Scan225 | Blank page marked with a 'Print Room' receiving stamp from Derby. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 20 DEC 1929 DERBY. | ||
| Scan226 | Feature requests following a 10,000-mile test, including tool storage, a reverse light, and bumpers. | ||
| View original record | To Da. From Hs/Rn. Hs/Rn.1/MJ.23.12.29. x7940@ x4522. x7270. 10,000 MILES TEST. There are two features we wish to get on this car if possible. One is a means of storing the jack handle, wheel spanner… | ||
| Scan227 | Test bed running of Phantom II Invar pistons, detailing issues with clearances, piston knock and recommendations for eccentric grinding. | ||
| View original record | To R. From Hs/ACL. C. to SG. WOT. C. to E. Da. C. to By. ORIGINAL HS/ACL.1/WAJ.27.12.29. X7040. INVAR PISTONS - PHANTOM II. We have done altogether about twelve hours test bed running with various… | ||
| Scan228 | Page 2 of a document specifying clearances and hot testing procedures for pads on a test bed. | ||
| View original record | -2- the centre of the pads and .0035 across the sides of the pads. These will be tested for knocks and freedom when hot, on the test bed. HS/ACL. | ||
| Scan229 | Blueprint diagram of a piston cross-section identifying an Invar strut and areas of tightening. | ||
| View original record | PISTON TIGHTENS IN BORE WHERE MARKED THUS. INVAR STRUT -ROYCE, LIMITED INT. ROOM. 24 DEC 1929 COPY. ael/24/12/29 | ||
| Scan230 | Required modifications to an Air Silencer Carburetter. | ||
| View original record | To E. From Hs/ACL. c. to BY. Wor. Hs/ACL.2/MJ.28.12.29. x7080. AIR SILENCER CARBURETTER LeC. 2734. We have found that certain modifications to the Air Silencer Carburetter are necessary in order to… | ||
| Scan231 | Test report detailing issues and observations on various vehicle components including filters, batteries, lubrication systems, and bodywork. | ||
| View original record | contd :- -9- ENOTS FILTER. The one feature which we take exception to with the Enots filter is the use of fibre washers behind the unions. These joints have on and off, leaked. BATTERY IN FRAME. LOP.… | ||