Rolls-Royce Archives
| Identifier | Entry | ||
| scan0001 | Comparison of road performance and power curves between the Continental Phantom and the standard production Phantom. | ||
| View original record | X7771 Continental Phantom Attached are road performance and power curves for the Continental Phantom as compared with the present standard production Phantom. The acceleration curves given for the… | ||
| scan0002 | Graph comparing the power at road wheels of the Standard and Continental Phantom (17EX) against an average Standard Phantom. | ||
| View original record | STANDARD AND CONTINENTAL PHANTOM (17EX). POWER AT ROAD WHEELS (B.H.P.) ROAD SPEED (M.P.H) 3RD GEAR POWER AT ROAD WHEELS. AVERAGE STD PHANTOM ------- 17EX. : ------ TOP GEAR RATIO 17EX = 3.25 STD =… | ||
| scan0003 | Graph showing Power at Road Wheels (B.HP) versus Engine R.P.M. for Standard and Continental Phantom models. | ||
| View original record | POWER AT ROAD WHEELS. STD AND CONTINENTAL PHANTOM WITH 5:1 COMPRN RATIO & 4.75 AXLE RATIO 15x52 Y-Axis: ROAD WHEEL B.H.P. X-Axis: ENGINE R.P.M Graph Data Labels: x 5:1 o 5:1 4.75:1 4:1 3RD GEAR… | ||
| scan0004 | Two graphs showing acceleration performance data for Standard and Continental Phantom models. | ||
| View original record | Top Graph: CAR SPEED (M.P.H) TIME (SECS) 3RD GEAR TOP GEAR ACCELERATIONS. STANDARD AND CONTINENTAL PHANTOM. STD TOURING CAR '98NK' : --------- CONTINENTAL CHASSIS 17EX (16x52 Rear Axle) ---- WITH TEST… | ||
| scan0005 | Power output and compression ratios for the F.2.B. series engine. | ||
| View original record | BJ. from Hs. c. to Wor. PN. c. to CWB. EP. c. to C. Mx. X7771 Hs3/LG7.6.28. POWER - F.2.B. SERIES. X.790 X.7771 X.7770 We do not anticipate that there will be any appreciable increase in power on the… | ||
| scan0006 | Request for HP to weight ratio comparisons for the New Phantom, Silver Ghost, Goshawk, and 20 HP Indian models. | ||
| View original record | X777P Pt.5/FM-20/6/28. Hs. Derby. C. to Whr. London. I should be very glad if you could inform me by return how the present New Phantom with 4 wheel brakes compares with the old Silver Ghost without… | ||
| scan0007 | Short memo confirming that requested curves have been sent in response to a prior communication. | ||
| View original record | X7771 To NA. from Hs/Rm. Hs/Rml/LG20.8.28. With reference to NA2/B8.4.28. Herewith the curves you require. Hs/Rm. | ||
| scan0008 | The full load power curve tests of the 'SS' engine and comparison with the Phantom engine. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to E. DA. c. to BY. x7771 Hs/ACL1/LG28.8.28. RR 'SS' ENGINE. x7770 We have had the 'SS' engine running for several hours under light loads and have now obtained a… | ||
| scan0009 | Page 2 of a report detailing engine tests, focusing on carburetter performance, induction systems, and resolving issues with dynamo drive and valve bounce. | ||
| View original record | contd :- -2- different valve timing or different angular relationship of cams. The induction pipe depressions are low - 2.4 ins. at 2750 r.p.m. - and we hope to be able to work somewhere near these… | ||
| scan0010 | Engine seizing issue, a proposed fix, and a weight comparison with the production Phantom. | ||
| View original record | contd :- -3- seizing and found that no oil was discharged down the push rod side on one or two push rods. We think it will be necessary to drill an oil hole in the rocker shaft opposite the push rod… | ||
| scan0011 | Power curve graph comparing the performance of the 'Super Sports' Phantom engine against the 'Continental' Phantom and an average production unit. | ||
| View original record | [ "V403", ""SUPER SPORTS" PHANTOM POWER CURVE.", "ENGINE No. S.S. 3.", "COMP. RATIO = 4.5.", "CLAUDEL-HOBSON CARB.", "AREA PAST CHOKE = 1.532 ☐"", "OPEN EXHAUST.", "VALVE TIMING (.020 CLS).", "INLET… | ||
| scan0012 | The running conditions and subsequent modifications for Super Sports Engine No. 55-3. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to E. DA. c. to BY. X7771 hs/ACL1/LG5.9.28. SUPER SPORTS ENGINE. X7100 X7770 Engine No.55-3., total running time to date = 12 hrs. Running conditions. Claudel… | ||
| scan0013 | Engine testing, covering vibration, fuel supply, valve timings, and oil system performance. | ||
| View original record | Contd :- -2- Two arrangements have been tried (V.406 and 411), both being equally good. The method adopting the flats is recommended more as this does not necessitate the use of small holes. A… | ||
| scan0014 | Blueprint showing the oil grooves in a dynamo drive bush for a Super Sports engine. | ||
| View original record | V404 FOR ALL OTHER DIMENSIONS SEE E77346. ROLLS-ROYCE, LIMITED PRINT ROOM, 5 SEP 1928 DERBY .312 +5 .125 +.20 1.130 +.5 DIA. .075 +.20 1.050 CTR +.10 SPIRAL GROOVE (R.H.), .040 WIDE x .015 DEEP, ONE… | ||
| scan0015 | Blueprint detailing oil drain grooves in a governor housing for a Super Sports Engine. | ||
| View original record | V405 TWELVE SLOTS EQUALLY SPACED, THUS:- .250 ±10 2.000 DIA +10 INVERTED PLAN (E77684) OIL DRAIN GROOVES IN GOVERNOR HOUSING (SUPER SPORTS ENGINE) PRINT ROOM, 5 SEP 1928 DERBY. | ||
| scan0016 | Sketch showing the arrangement of an oil scoop for a super-sports engine. | ||
| View original record | V409 OIL TROUGH (TO PLAIN BEARING) SCOOP RIVETED TO WHEEL-CASE. DYNAMO DRIVE PINION SKETCH SHEWING ARRANGEMENT OF OIL SCOOP. (SUPER - SPORTS ENGINE) ROLLS-ROYCE, LIMITED PRINT ROOM, 5 SEP 1928 DERBY. | ||
| scan0017 | Technical drawing of a Modified Rocker Shaft for a Super-Sports Engine. | ||
| View original record | FOR ALL OTHER DIMENSIONS SEE E77885. V411. 16.775 ±15 .475 ±5 5.687 ±5 11.187 ±5 .500 +20 .100 +20 SIX FLATS THUS. 16.300 ±3 .812 ±5 .800 ±5 1.200 ±5 1.100 ±5 SECTION AA SECTION BB SECTION CC .093… | ||
| scan0018 | Performance graph for engine no. 553, detailing the power curve, oil pressures, and induction depression. | ||
| View original record | SUPER SPORTS ENGINE POWER CURVE. ENGINE No 553. COMP. RATIO = 4.5. CLAUDEL HOBSON CARBURETTOR. HOT SPOT (WATER) IN ACTION OPEN EXHAUST. BRAKE HORSE POWER R.P.M. OF ENGINE. DEPRESSION (INCHES OF… | ||
| scan0019 | Technical report on the running conditions and performance testing of the 'SS' Engine No. SS-3. | ||
| View original record | To R. from HS/ACL. c. to BJ. Wor. c. to E. DA. c. to BY. X7771 HS/ACL1/LG20.9.28. 'SS' ENGINE. X.7090 X.7070 X.1452 X.7771 Engine No.SS-3. Running conditions. Claudel Hobson Carburetter (Eagle 1X).… | ||
| scan0020 | Comparison of power curves for 110° and 116° camshafts, with notes on vacuum pump lubrication and tappet adjustment. | ||
| View original record | contd :- -2- at the lower speeds. see V.423 for full comparison. It should be noted that the power curve of the 110° camshaft was taken with the nozzle E.77799 fitted in the induction pipe, whereas… | ||
| scan0021 | Power curve graph for the Super Sports Engine N°SS-3 with a 116° camshaft, comparing performance with a 110° camshaft. | ||
| View original record | V423 POWER CURVE WITH 116° CAMSHAFT. SUPER SPORTS ENGINE N°SS-3. COMP. RATIO = 4.5 CLAUDEL HOBSON CARBURETTOR HOT SPOT IN ACTION (WATER AT 75°C) OPEN EXHAUST. 116° CAMSHAFT TO E77322. (N.B. NOZZLE… | ||
| scan0022 | The running conditions and compression pressure tests for 'SS' Engine No. SS-3. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to E. DA. c. to BY. (7771) Hs/ACL1/LG28.9.28. 'SS' ENGINE. X790 X7770 Engine No. SS-3 - Total running time to date = 38¼ hrs. Running conditions. Claudel Hobson… | ||
| scan0023 | Various engine noises, including piston knock, rocker mechanism noise, and timing gear issues. | ||
| View original record | contd :- -2- small elbow fitted on to the induction pipe. This change has been made in order that the mechanical & noise of the engine could be studied more carefully: The Claudel carb. making so much… | ||
| scan0024 | Graph of compression pressures for a Super Sports Engine. | ||
| View original record | V431. COMPRESSION PRESSURES (SUPER SPORTS ENGINE). ENGINE No SS-3. (COMPRESSION RATIO=4.5). CLAUDEL-HOBSON CARBURETTOR. HOT-SPOT IN ACTION (WATER @ 75°C). 116° CAMSHAFT. FULL BED EXHAUST SYSTEM. FULL… | ||
| scan0025 | Graph plotting the mechanical efficiency and friction horsepower of Engine No SS-3 against its RPM. | ||
| View original record | MECHANICAL EFFICIENCY (SUPER SPORTS ENGINE). ENGINE No SS-3. PERCENTAGE MECHANICAL EFFICIENCY. HORSE POWER. R.P.M. OF ENGINE. MECH. EFFICy. FRICTION H.P. 100%. 90%. 80%. 70%. 1000. 1500. 2000. 2500.… | ||
| scan0026 | Technical memo discussing sticking 20 HP valve inlets and Phantom power curves. | ||
| View original record | To E. from Hs/Rm. 7771 Hs/Rm8/LG17.10.28. With reference to our telephone conversation of yesterday. Reports on most of the points will be coming through, but briefly the information you asked for is… | ||
| scan0027 | Engine performance issues, including camshaft effects, piston rings, and torque reaction experiments. | ||
| View original record | contd :- -2- not too well with the Claudel. The compression ratio could probably be further increased without torque reaction troubles because the 116º camshaft drops the MEP. slightly at the lower… | ||
| scan0028 | Ratings for two couplings and details of a Chrysler spring drive. | ||
| View original record | contd :- -3- Attached are ratings of the two couplings we are trying and details of the Chrysler spring drive which you will see are almost a year old. We cannot help feeling there is something in it,… | ||
| scan0029 | Graph comparing Torque vs. Angular Deflection for a Standard Hardy Coupling and an ALPE Coupling. | ||
| View original record | TORQUE LBS/FT 700 600 500 400 300 200 100 STANDARD HARDY COUPLING APPROX. MAX ENGINE TORQUE ALPE COUPLING ANGULAR DEFLECTION DEGREES 1° 2° 3° 4° 5° 6° 7° 8° 9° 10° | ||
| scan0030 | Expressing concern that the 'SS' engine development has been neglected due to the focus on aero engine work. | ||
| View original record | Hs. from R. c. to BJ. Wor. BY. +7771 R3/M17.10.28. 'SS' ENGINE. 7080 7070 X.7771 Regarding 'SS' engine, apparently owing to the importance of the aero engine work, we fear that the development of the… | ||
| scan0031 | Engine compression experiments, torque re-action, and potential carburetion improvements. | ||
| View original record | 7771 (handwritten) E. Hs. from R. BY. c. to BJ. Wor. RL/M17.10.28. EAC.10. (SS) RE. COMPRESSION. X.790 X.7080 X.7005 X.7771 In our experiments we should use the highest compression that the engine… | ||
| scan0032 | The running conditions, power curve, and recent modifications of the Super Sports Engine S.S.3. | ||
| View original record | To R. from Hs. c. BJ. E. c. Da. Rg. c. By. Wor.X X7771 Hsl/T18.10.28. SUPER SPORTS ENGINE. X459 Engine No. S.S.3. Total running time to date 46 1/2 hrs. Running conditions:- Standard Phantom… | ||
| scan0033 | Continued report on engine testing, detailing issues with manifold distortion, gear noise, piston lapping, and oil pressure. | ||
| View original record | -2- Contd. noise apparently penetrates the comparatively thin material from which the manifold is made. The brazing of the large flange on the manifold failed due to the heat after a few minutes full… | ||
| scan0034 | Engine modifications concerning oil supply, crankcase pressure, and valve mechanism noise. | ||
| View original record | Contd. -3- native to reducing the pump capacity, the relief valve should be increased in size. A modification of the rocker shaft is being prepared, which will restrict slightly the oil flow to the… | ||
| scan0035 | Graph of petrol consumption curves for a Super Sports engine. | ||
| View original record | PETROL CONSUMPTION CURVES (SUPER SPORTS ENGINE) ENGINE No 55-3. STD. PHANTOM CARBURETTOR (WITH HOT SPOT). COMPLETE BED EXHAUST SYSTEM. FOR POWER CURVE SEE V445. CONSUMPTION (PTS / HR). SP. CONS. (PTS… | ||
| scan0036 | Power curve graph for the Super Sports Engine No. SS-3. | ||
| View original record | V445. SUPER SPORTS ENGINE POWER CURVE. ENGINE No SS-3. COMP. RATIO = 4.5. HOT SPOT IN ACTION. COMPLETE BED EXHAUST SYSTEM. 116° CAMSHAFT. (E77322). STANDARD "PHANTOM" CARBURETTOR. BRAKE HORSE POWER.… | ||
| scan0037 | 'SS' engine development work, comparing its performance to the F.2.B. series engine. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to E. DA. c. to BY. X7771 Hs/ACLL/LG26.10.28. 'SS' ENGINE DEVELOPMENT WORK. X7770 We have carried out various tests on the 'SS' engine and made comparisons with… | ||
| scan0038 | Technical discussion on increasing engine power through carburettor and compression ratio modifications. | ||
| View original record | contd :- -2- carburetters, coupled with the refined low speed and metering attributes of our present chassis carburetter. Previous attempts to increase the power have been somewhat masked by the high… | ||
| scan0039 | Analysis of engine power gains and comparative airflow tests between SS and F.2.B. cylinder heads. | ||
| View original record | contd :- -3- becoming troubled with detonations. We will test ratios up to 5 to 1. Analysing the results of the tests and referring to the curves shewing the power output of the SS. with low… | ||
| scan0040 | Increasing valve lift to improve air flow and volumetric efficiency, with proposals for further testing on an SS engine. | ||
| View original record | contd :- -4- and secondly the appreciable increase in flow when the valve is lifted above the standard amount. The std. lift is .429 and these diagrams shew that by increasing the valve lift to .600… | ||
| scan0041 | Engine component testing, including induction systems, carburetors, manifolds, and pistons. | ||
| View original record | contd :- -5- With regard to the other tests we have carried out we consider the six port induction system gives better distribution than our previous four-port engines. The vertical Claudel… | ||
| scan0042 | Engine noise issues from springs and valves, with recommendations for modifications. | ||
| View original record | contd :- -6- siderable spring noise with the double springs being manifest by a loud 'swishing' noise at various engine speeds. This we trace to spring periods, the noise being due to the coils… | ||
| scan0043 | Graph of Mechanical Efficiency and Friction Horse Power for the Super Sports Engine No. SS-3. | ||
| View original record | MECHANICAL EFFICIENCY (SUPER SPORTS ENGINE) ENGINE No SS-3 PERCENTAGE MECHANICAL EFFICIENCY. 100% 90% 80% 70% MECH. EFFICy FRICTION H.P. R.P.M. OF ENGINE. 1000 1500 2000 2500 HORSE POWER. 30 20 10 0… | ||
| scan0044 | Graph comparing airflow through Super Sports and F-2-B series inlet valves. | ||
| View original record | V469. COMPARISON OF AIR FLOW THRO' INLET VALVES (SUPER SPORTS & F-2-B SERIES). PRESSURE DROP ACROSS VALVE = 2.8 LBS/□" AIR FLOW (POUNDS PER MINUTE) VALVE LIFT (INCHES) SUPER SPORTS INLET VALVE (1.900… | ||
| scan0045 | Blueprint graph comparing the power output of a Super Sports engine against a standard F-2-B series engine. | ||
| View original record | V468. SUPER SPORTS ENGINE POWER COMPARISON. COMPLETE TEST BED EXHAUST SYSTEM. S.S. ENGINE (COMP. RATIO = 4.5) CLAUDEL CARB. STD. PHANTOM CARB. STD. F-2-B SERIES ENGINE. DITTO; CALCULATED BHP WITH A… | ||
| scan0046 | Blueprint of an apparatus for measuring airflow past valves for different pressure heads and various lifts. | ||
| View original record | S.S. VALVE TESTS. THIS APPARATUS IS USED FOR MEASURING THE AIR FLOW PAST THE VALVES FOR DIFFERENT PRESSURE HEADS & VARIOUS LIFT. VALVE LIFT ADJ. SCREW DELIVERY PIPE. TUBE CONNECTED TO CYL. HEAD 4.25"… | ||
| scan0047 | The power loss and noise from the super sports exhaust system manifold. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to BY. X7771 Hsl/LG27.10.28. SUPER SPORTS EXHAUST SYSTEM. X7230 We attach curves which shew the loss due to the exhaust manifold. As this comparison was… | ||
| scan0048 | Graph plotting brake horsepower and percentage power loss against engine RPM for a Super Sports Engine with and without an exhaust manifold. | ||
| View original record | POWER LOSS TO EXHAUST MANIFOLD. SUPER SPORTS ENGINE. ENGINE N.o SS.3. STD. "PHANTOM" CARBURETTOR. OPEN EXHAUST PORTS. EXHAUST MANIFOLD TO L.E.C. 2518. PERCENTAGE LOSS TO MANIFOLD. BRAKE HORSE POWER.… | ||
| scan0049 | Options for improving acceleration through ample engine power or improved gearing, such as a freewheel mechanism. | ||
| View original record | Hs. DA. E. BY. from R. c. to BJ. Wor. c. to PN. LHS. c. to SG. CWB. C. c. to Mr. Claremont. X7771 R1/M7.11.28. ACCELERATIONS. X.1725 X.7771 X.7310 X.8310 X.4550 We think for traffic work a… | ||
| scan0050 | Proposed gearbox design combining an epicyclic unit with a conventional 2-speed gearbox. | ||
| View original record | contd :- -2- ...sliding these, or continual mesh, with jaw clutch and freewheel side shaft, and also of a still higher 3rd. ratio to be more useful and easier to get into. (There are no double top… | ||
| scan0051 | The performance of the 'SS' Chassis Engine and improvements on the 19-EX engine. | ||
| View original record | Hs. E. R2/M16.1.29. DA. RG. FROM R. BY. c. to BJ. Wor. Sg. c. to PN. CWB. C. 'SS' CHASSIS ENGINE. X.7771 X.7770 X.7070 This is undoubtedly distinctly more powerful, and our acceleration, hill… | ||
| scan0052 | Test report on Hypoid gears under full torque conditions on an 'SS' chassis. | ||
| View original record | To R. from Hs. c.c. to Sg. Wor. c.c. to E. DA. c.c. to BY. 77771 Hs3/LGS.2.29. 'SS' - S E C R E T. +2066 We have carried out several tests on two 'SS' chassis on the road wheel dynamometer. The chief… | ||
| scan0053 | Investigations into joint faults, gearbox tests, and petrol consumption. | ||
| 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… | ||
| scan0054 | Power curves of the SS model versus the Phantom and the functionality of 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… | ||
| scan0055 | Performance graph showing Horse Power at Road Wheels vs. Engine R.P.M. for Standard Phantom and S.S. chassis. | ||
| View original record | B.H.P. AT ROAD WHEELS ENGINE R.P.M. 3RD GEAR HORSE POWER AT ROAD WHEELS STANDARD PHANTOM AND S.S. CUT OUT CLOSED STANDARD PHANTOM AVERAGE STANDARD PHANTOM MINIMUM S.S. CHASSIS (21EX & 23EX) CUT OUT… | ||
| scan0056 | Blueprint comparing various types of trunnion bearings. | ||
| View original record | INDIA. AMERICAN TYPE STANDARD TYPE. G53671 STIFFENED TYPE. G53671 SS. STANDARD TYPE. G76832 STIFFENED TYPE. EX.3788 COMPARISON of TRUNNION BEARINGS a.k. 8-2-29 | ||
| scan0057 | Technical memorandum detailing dynamometer performance and weight data for the S.S. and Standard Phantom models. | ||
| View original record | To EP from Hs/Gy. Hs/Gyl/MJ. 9.7.29 X/MMI RE. S.S. X/MMI X4840. The information you require as taken from our files is as follows :- (1) Dynamometer performance. Cut-Out Closed. Std. Phantom. Av. S.S.… | ||
| scan0058 | S.S. chassis tests, discussing axle performance, steering, and investigations into noise issues on various experimental cars. | ||
| View original record | To Rh. from Hs. C. to G.W.H. X7771 Hs.2/MJ.16.7.29. TESTS ON S.S. CHASSIS. ---------- X7771 X7230 We have received your reports of Thursday last and the one of the 13.7.29. I have read your comments… | ||
| scan0059 | Manifold and exhaust note tests, comparing Phantom models and S.S. cars. | ||
| View original record | -2- Manifold makes no difference to the exhaust note either with the cut-out open or shut. We have welded a partition dividing the top manifold into two portions. This does not alter the exhaust note.… | ||
| scan0060 | Performance analysis comparing the standard silencer system with a new cast aluminum expansion box system for the Phantom II. | ||
| View original record | To R. From Hs/ACL. c.c. to SG. Wor. c.c. to Da. E. c.c. to Ry. X7771 Hs/ACL.2/MJ.13.1.30. X7230 X7771 PHANTOM 11 SILENCERS - COMPARISON OF STD. SYSTEM WITH CAST ALUM. EXPN: BOX SYSTEM. We have made an… | ||
| scan0061 | The overheating and melting of an aluminium exhaust component during bench testing, with plans for further road tests. | ||
| View original record | -2- HS/ACL. 2/AL.13.1.30.Contd. pipe from the manifold to the front expansion box instead of the 3" dia. down pipe. In this case there was a power loss with 'cut out closed' as well as cut-out open.… | ||
| scan0062 | Graph showing Brake Horse Power against RPM for an engine with various exhaust system configurations. | ||
| View original record | 9-1-30 V765. POWER LOSS TO EXHAUST SYSTEM (S.S.) EXHAUST SYSTEM TO N.SCH. 2931/2/47, HAVING CAST ALUMINIUM EXPANSION BOX & SILENCER ENDS. ENGINE N°SS-15 (STANDARD) (3.0" MANIFOLD PIPE.) CURVES… | ||
| scan0063 | Graph showing power loss curves for engine No SS-15 with various standard exhaust system configurations. | ||
| View original record | V766. 9-1-30 POWER LOSS TO STANDARD EXHAUST SYSTEM (S.S.) ENGINE No SS-15 (STANDARD) CURVES CORRECTED TO N.T.P. BRAKE HORSE POWER RPM. OF ENGINE. OPEN EXHAUST SWAN NECK & MAIN SILENCER REMOVED.… | ||
| scan0064 | Performance graph comparing Brake Horse Power vs RPM for different exhaust manifold pipe systems on engine SS-15. | ||
| View original record | 10-1-30 V767. COMPARISON OF MANIFOLD PIPES - EXHAUST SYSTEM TO N.SCH. 2931/2/47 (S.S.) THESE CURVES SHEW THE POWER OBTAINED WITH THE ABOVE EXHAUST SYSTEM, WHEN USING ① A 3.0" MANIFOLD PIPE (REDUCED TO… | ||
| scan0065 | Blueprint diagram illustrating the failure points of a cut-out ring. | ||
| View original record | Cut-Out Ring Failure (E79544). V 768 Melted Here Cracks & Nearly Melted. JWB 11-1-30 | ||
| scan0066 | The performance of a Solex twin choke carburettor on a Phantom II car. | ||
| View original record | To R. (Held up) From Hs. c. to Sg. Wor. /AJL. c. to L. Da. c. to Ey. PN. x7771. Hs.3/MJ. 22.1.30. *************************************************** SOLEX TWIN CHOKE CARBURETTOR ON PHANTOM II. POWER… | ||
| scan0067 | Carburetter performance, detailing throttle response and potential refinements. | ||
| View original record | -2- carburetter as regards metering at medium throttle openings etc. but in spite of this it functions remarkably well. It is possible to bang open the throttle from 5 m.p.h. on top gear and the car… | ||
| scan0068 | The petrol consumption of an S.S. car, comparing different driving styles and speeds. | ||
| View original record | Hm. From Hs/Rm. x7771 Hs/Rm.5/MJ.14.2.30. PETROL CONSUMPTIONS OF S.S. CAR. K459 x7771 We find on looking up our records that the petrol consumption of our last 10,000 miles car averages about 10.5… | ||
| scan0069 | Cooling system tests for the 19-EX and Phantom II models conducted at Brooklands. | ||
| View original record | To R. from Hs/Am. c. Se. Wor. c. Ds. E. c. By. Rg. c. Lr. X7771. Hs/RmL/MJ25.6.30. X.788 X.766 X.7250 X.7260 X.7220 X.7771 X.7772. BROOKLANDS TESTS JUNE 17th to 20th 1930. We took 19-EX car to… | ||
| scan0070 | Tests conducted to improve vehicle engine cooling by adjusting ventilation, shutters, and underpanels. | ||
| View original record | -2- Hs/AML/T.26.6.30. contd. it. Therefore, in order to establish a basis of comparison for all conditions, the car was driven at a constant speed of 62 M.P.H. round the track until the heat… | ||
| scan0071 | Engine cooling improvements, including ventilated bonnets, radiator design, and oil temperature analysis for hot climates. | ||
| View original record | -3- Rs/Epl/All25.6.30 contd. We think that it is essential to fit ventilated bonnets to cars going to hot climates because the critical atmospheric temperatures at which the car will boil is certainly… | ||
| scan0072 | Vehicle performance, detailing issues with overheating, petrol supply, and recorded lap speeds. | ||
| View original record | -4- reaches is rather excessive (Graph (4). We have recorded temperatures as high as 110°C. after a prolonged burst of speed on the track with atmospheric temperatures of only 20°C. As the ignition… | ||
| scan0073 | Test report continuation comparing vehicle performance, detailing issues with an American car and model 19-EX during speed and engine tests. | ||
| View original record | -5- Hs/aal/21 25.6.30 contd. might be worth certification by the track authorities for sales propaganda. We traced the inferior performance of 18-EX to a tighter engine by allowing the cars to come to… | ||
| scan0074 | Engine cooling system tests, including water circulation, fan belt tension, and the American Phantom II. | ||
| View original record | -6- Hs/Rnl/W25.6.30 contd. the tests, and ascertained that it was subjected to the correct tension. We compared the radiator temperature in this condition with the fan belt tightened choc a bloc and… | ||
| scan0075 | Summary of improvements and findings related to the Phantom II's bonnet ventilation, fan, and radiator systems. | ||
| View original record | -7- Hs/ml/TW25.6.30 contd. advance or fan, but we are confident that it will be up to standard on the present 10,000 milestest. SUMMARY. Bonnet Ventilation. Phantom II requires as much ventilation as… | ||
| scan0076 | The necessity of fitting ventilated or louvred bonnets to cars to cope with high speeds. | ||
| View original record | HS/Rml/MJ25.6.30 contd. -8- special motor roads, all encourage high speeds. We know of no big car used on the Continent that does not fit ventilated bonnets. Therefore, while we are better off for… | ||
| scan0077 | Graph plotting water and oil temperatures against miles run during a vehicle test. | ||
| View original record | GRAPH I TEMP C° 90° 80° 70° 60° MILES RUN 5 10 15 20 TOP WATER OIL BOTTOM WATER 19 E.X. 14 x 52 AXLE. 62 M.P.H. 6 m/m 7 1/2 m/m RAD. NO BONNET VENTILATION. ATS TEMP. 24°C. | ||
| scan0078 | Graph showing the ambient temperatures at which a Standard Phantom II Cabriolet will overheat with different ventilation modifications. | ||
| View original record | GRAPH II STANDARD P.II CABRIOLET 19 E.X. AXLE RATIO 14x52 WT. 48 CWT. EMPTY TEMP. AT WHICH CAR WILL OVER-HEAT EVENTUALLY. (100°C - TOP WATER TEMP) TEMP SCALE: 10°C, 20°C, 30°C, 40°C, 50°C STANDARD NO… | ||
| scan0079 | Graph showing top and bottom water temperatures under various bonnet and shutter configurations. | ||
| View original record | GRAPH III. STANDARD. REAR BONNET SHUTTERS OPEN. FRONT UNDERSHIELD OFF. FRONT BONNET SHUTTERS OPEN. ALL SHUTTERS OPEN. LOUVRED BONNET. LOUVRED BONNET FRONT PAN OFF. TOP WATER TEMP. BOTTOM WATER TEMP.… | ||
| scan0080 | Graph plotting oil and water temperature against miles run under specific vehicle conditions. | ||
| View original record | GRAPH IV TEMP C° 100° 90° 80° 70° MILES RUN 25 30 35 62 M.P.H. C.O. CLOSED ATS TEMP 20°C CAR OPENED FULL OUT C.O. OPEN 83 M.P.H. OIL TEMP. TOP WATER VENTILATED UNDERSHIELD ALL BONNET SHUTTERS OPEN | ||
| scan0081 | Graph comparing critical air temperatures for spring-tensioned vs positively-tensioned fan belts at 62 MPH without bonnet ventilation. | ||
| View original record | GRAPH V. 19 E.X. 62 M.P.H. NO BONNET VENTILATION. COMPARISON OF SPRING TENSIONED FAN AND FAN BELT TENSIONED POSITIVELY CRITICAL ATS TEMP. 40°C 30°C 20°C 10°C 40.5 SPRING TENSIONED 44.5 BELT TIGHTENED.… | ||
| scan0082 | Graph comparing top water temperature against miles run for experimental models 18 E.X. and 19 E.X. | ||
| View original record | GRAPH VI. TOP WATER TEMP °C MILES RUN. 18 E.X. 19 E.X. OPENED UP TO FULL THROTTLE COMPARISON OF 19 E.X. AND 18 E.X. 6 m/m 7 1/2 m/m RAD. 62 M.P.H. TOP WATER TEMP. No BONNET VENTILATION. ATS TEMP 24°C. | ||
| scan0083 | Blueprint illustrating a modification to the front undershield to improve the cooling system. | ||
| View original record | MODIFICATION TO IMPROVE COOLING SYSTEM. CUT AWAY FRONT UNDERSHIELD STANDARD FRONT UNDER SHIELD | ||
| scan0084 | Second report on Brooklands radiator tests, detailing issues with the autovac fuel supply system. | ||
| View original record | X7771 To R. from Hs/Rm. c. Sg. Wor. c. Da. E. c. Ty. Rg. c. Lr. Hs/Rml/MJ9.7.30. X.788 X.766 X.7250 X.7260 X.7220 X.7771 X.7510 X.7772 BROOKLANDS RADIATOR TESTS. SECOND REPORT. We carried out a… | ||
| scan0085 | Engine fuel supply, vacuum pump efficiency, and overheating issues. | ||
| View original record | -2- HS/Rml/MJ9.7.30 contd. temperature of the air intake to the carburetter. With an atmospheric temperature of 24°C. the air intake reached 50°C. at 75 M.P.H. As soon as the car was stopped this… | ||
| scan0086 | Cooling system fan belt performance and mixture strength issues at high speeds. | ||
| View original record | -3- by such leaks in service has been brought to our notice. COOLING SYSTEM - FAN We confirmed our previous result that the standard spring loaded whittle belt is incapable of driving the fan… | ||
| scan0087 | Engine pre-ignition, fuel supply, and a comparison of different radiator matrixes and bottom outlets. | ||
| View original record | -4- Hs/Rml/MJ9.7.30 contd. pre-ignition and over-heating. The simplest way of overcoming this is to run on the reserve. This trebles the period of full throttle work before shortage takes place. The… | ||
| scan0088 | Engine cooling circulation tests, analyzing the effects of system restrictions and vehicle speed on water temperature. | ||
| View original record | Hs/Rml/MJ9.7.30 contd. -5- CIRCULATION. We conducted tests on the track restricting the circulation until the system lost efficiency to the extent of about 2°C. top water temperature. The flow under… | ||
| scan0089 | Analysis of a car's cooling system performance under various driving conditions and ambient temperatures. | ||
| View original record | HS/Pml/AJ9.7.30 contd. -6- efficient fan, a rich mixture and a ventilated bonnet the car should not over-heat at air temperatures below 35°C. when driven all out continuously in still air, and if… | ||
| scan0090 | Recommendations for improvements to fuel and cooling systems, and proposals for Phantom II hill climbing tests. | ||
| View original record | -7- He/Hml/MJ9.7.30 contd. Our recommendations for improvement are - (1) Improved fan belt. Standardisation sheet circulated. We are so dependent on this that we think the drive might receive design… | ||
| scan0091 | Graphs illustrating the results of a Brooklands test on an engine cooling system, detailing the effects of fan configuration, vehicle speed, and radiator shutters on water temperature. | ||
| View original record | GRAPH I TEMPERATURE C° A. NO FAN STANDARD SPRING TENSIONED WHITTLE BELT. WHITTLE BELT TIGHTENED CHOC À BLOC BELT CHOC À BLOC AND FAN 1" NEARER RAD TOP WATER TEMP BOTTOM WATER TEMP ATS TEMP. 20°C… | ||
| scan0092 | Series of graphs and diagrams illustrating the effect of water circulation on overheating in a car's cooling system. | ||
| View original record | GRAPH II EFFECT OF CIRCULATION ON OVERHEATING 19 E.X. CAR A BACK PRESS CAUSED BY RESTRICTION 15 LBS/D'' WATER OUTLET FROM THE CYL: BLOCK RESTRICTED TO 23-.125 HOLES. TOP WATER TEMP ATS TEMP. 20°C… | ||
| scan0093 | Graph from a Brooklands test showing top and bottom water temperatures under various fan and radiator conditions. | ||
| View original record | GRAPH III TEMPERATURE °C 90 85 80 75 70 65 60 ① FULL WEAK NO FAN. ② AS ① BUT MIXTURE NORMAL NO FAN. ③ AS ② BUT FAN SPRING LOADED ④ AS ③ BUT FAN BELT CHOC À BLOC. ⑤ AS ④ BUT FAN 1" NEARER RAD: ⑥ AS ⑤… | ||
| scan0094 | Graph showing the effect of temperature on complete car circulation. | ||
| View original record | GRAPH IV EFFECT OF TEMP. ON COMPLETE CAR CIRCULATION RADIATOR E. 79951 FLOW GAL/MIN DEPRESSION ON SUCTION SIDE OF THE PUMP INS HG. 2500 ENGINE R.P.M. BOTTOM WATER TEMP. C° CIRCULATION GAL/MIN… | ||
| scan0095 | Friction horsepower test on a Phantom II engine. | ||
| View original record | To Da. From Hs/ACL. c. to Rg. 8771 Hs/ACL.2/MJ.18.8.30 PHANTOM OVER-RUN TORQUE. We have made a test of the friction H.P. of the Phantom ll engine at 1000 R.P.M. by the method of cutting out cylinders… | ||
| scan0096 | The comparative cooling performance of five cars tested at Brooklands. | ||
| View original record | To R. From Hs/Ru. c. to SS. Wor. c. to Ds. E. c. to By. Rg. Hs/Ru.7/IMJ.25.8.30. X.788. X.4012. X.766. X.1692. X.7771. X.4588. X.5771. X.3531. FIFTH BROOKLANDS REPORT. We have now completed the… | ||
| scan0097 | Comparison of cooling system capacity and performance characteristics against competitor vehicles. | ||
| View original record | -2- Hs/Rq.7/MJ.25.8.30.Contd. were not the bonnet louvres the only means of escape for the air. The results indicate that we are well up in the dimensions of our cooling system compared with other… | ||
| scan0098 | Report page detailing vehicle performance comparisons, speedometer data, and maximum speed tests for various models. | ||
| View original record | -3- Hs/Rm.7/ML.25.8.30.Contd. reached on this gear in comfort. We think that the Graham Paige have cleverly exploited the obsolete R.A.C. rating formula and will get a good reputation when compared… | ||
| scan0099 | Continuation page mentioning gain due to a 112º camshaft and higher compression. | ||
| View original record | -4- Hs/Rm.7/LH.25.8.30. Contd. gain due to the 112º camshaft and higher compression. | ||
| scan0100 | Comparison of vehicle specifications across different car manufacturers, including data on face area, volume, and temperature. | ||
| View original record | TABLE 1: CAR. Face Area per 1000 litre disp. per mile. ROLLS-ROYCE 25 HP. | 83.0 sq.ins. CHRYSLER 75. | 82.7 sq.ins. HISPANO | 77.2 sq.ins. ROLLS-ROYCE 40/50. | 71.2 sq.ins. GRAHAM PAIGE | 65.2… | ||
| scan0101 | Blueprint with two graphs comparing vehicle acceleration figures and speedometer calibrations. | ||
| View original record | COMPARATIVE ACCELERATION FIGURES ACCELERATION FT/SEC 2 ROAD SPEED M.P.H. GRAHAM PAIGE SILENT THIRD GRAHAM PAIGE TOP G.W.H. FIGURES 24 E.X. 6000 MILES 14G IX AFTER 10,000 SPEEDOMETER CALIBRATIONS %… | ||
| scan0102 | Comparative analysis of vehicle cooling systems and performance data for various cars. | ||
| View original record | COLUMN HEADERS: TYPE OF CAR, DISPLACEMENT, TYPE OF BODY, WT OF COMPLETE CAR AS TESTED DIMENSION OF MATRIX, WATER CAPACITY OF SYSTEM. TYPE OF TOP MATRIX TANK DIMENSIONS FAN AND DRIVE DIRECT DRIVE RATIO… | ||
| scan0103 | Loss of horsepower in the Phantom II American Chassis & N. Series. | ||
| View original record | Hs. C. Wor. EP10/H23.1.31. re. PHANTOM II. AMERICAN CHASSIS & N. SERIES. LOSS OF H.P. With reference to the discussion with Rm. re above. As requested, I give particulars below. Four of the above cars… | ||
| scan0104 | Maximum speeds of Phantom II cars and the factors affecting performance, such as body type and windage. | ||
| View original record | To EP. From Hs/Rm. 87771. Hs/Rm.1/MJ.9.3.31. With reference to LE16/C/4.3.31. We presume the lower speeds that JLE. gives were stop-watch figures. We think that any Phantom 11 cars should do over 80… | ||
| scan0105 | Proposal outlining experiments to increase the power output on the Phantom II engine. | ||
| View original record | To L.H.S. from Hs/Lov. c. Hs. c. Hs/Rm. File. 87771. Hs/Lov2/ADL.7.4.31. INCREASING POWER OUTPUT ON PHANTOM II. We propose to carry out the following experiments with the object of increasing the high… | ||
| scan0106 | Engine development considerations for valve train, induction, and exhaust systems. | ||
| View original record | -2- (2) We wish to control the valves up to 3500 R.P.M. Several designs for multiple valve springs exist and we should look these out and see what is the maximum valve lift these will allow. Also… | ||
| scan0107 | Engine power enhancement experiments and modifications. | ||
| View original record | Hs/Lov2/ADL7.4.31 contd. -3- (a) Power with open exhausts or short stub pipes. (b) Power with standard silencer C/O open and shut - only at high speeds - above 2500 R.P.M. (c) Three down pipes into… | ||
| scan0108 | Comparison of engine performance against Bentley, with suggestions for improvements. | ||
| View original record | CONFIDENTIAL. Hs. } FROM R. X7771 RL/M21.4.31. E. (At Le Canadel) c. Sg. Wor. Ev. c. PN. Da. X.3805 X.3993 X.7771 RR. AND BENTLEY COMPARED We always expect the Bentley to beat us on maximum speed, but… | ||
| scan0109 | Engine performance, speed comparison, and future engine considerations. | ||
| View original record | R1/M21.4.31 contd. -2- I was very pleased to see that our engine was equally smooth at high speed. We seem to be down very much in maximum speed - 15 MPH. To be comparable we should not be more than 5… | ||
| scan0110 | Engine power output, comparing the Phantom engine with Ricardo sleeve designs, and considering future improvements. | ||
| View original record | X7771 Hs. E. } FROM R. By. } (At Le Canadel) RL/M24.4.31. X.7771 c. Sg. Wor. PN. POWER FROM OUR CAR ENGINE X.5771 AND RICARDO SLEEVE. X.4540. Mr. Elliott shows on 8.4.31 that Derby have long ago got… | ||
| scan0111 | Calculated horsepower required for a Phantom II to achieve 100 MPH, referencing a graph and comparing to Bentley performance. | ||
| View original record | HS/RM. FROM E. COPY. E4/M2. 5. 31. U. to SG. WOR. re. HP. REQUIRED ON P. 2. TO ACCOMPLISH 100 MPH. We send herewith Lec. 2913. shewing a graph of HP. required for various road speeds developed from a… | ||
| scan0112 | Engine and body modifications for a P.2 100 M.P.H. demonstration vehicle. | ||
| View original record | Hs. from R. and E. c. Sg. Wor. By. c. C. CX. PN. X7771 R1/M20.5.31. X.7770 X.7771 RE : P.2 100 M.P.H. DEMONSTRATION. It would appear that with the present sports body this will take say 175 BHP., and… | ||
| scan0113 | Experiments with different valve lifts, camshafts, and carburetters to improve engine power output on the 25 HP and 40/50 models. | ||
| View original record | To E. From Hs/Rm. Hs/Rm.1/KT. 22. 5. 31. X.5771. X.7771. POWER OUTPUT 25 HP. AND 40/50. We are sending you details of the various valve lifts we are trying. The cams we have are - (1) The old short… | ||
| scan0114 | Power output test on a Continental Phantom II engine with modified timing and camshaft. | ||
| View original record | To R. from Hs/Rm. c. Sg. c. WGT. Da. c. E. Ry. X7771. Hs/Rml/AB23.5.31. CONTINENTAL P.II. POWER OUTPUT. X.7120. X.7771. We have had a run on a standard P.II. low compression engine fitted with twin… | ||
| scan0115 | High speed engine experiments, focusing on carburettors, detonation, and vibration. | ||
| View original record | Hs. from R. c. Sg. c. Wor. c. Pv. X7771 R5/M28.5.31. HIGH SPEED EXPERIMENTS. X.7771 X.7080 X.7005. We are pleased to hear that you are getting on well with the power of P.2. at high speeds and maximum… | ||
| scan0116 | On experiments conducted to increase the horsepower of the F.2 engine. | ||
| View original record | To R. From Hs. c. to Fg. Wor. c. to R. Da. c. to Hy. 8776 HS.3/MJ.3.6.31. x7090 F.2 EXPERIMENTS FOR INCREASING HP. We attach herewith curves which show the increase in HP. we have been able to obtain… | ||
| scan0117 | Experiments to increase engine power by modifying carburetters, camshaft, and compression ratio. | ||
| View original record | To R. from Hs/Swdl. c. SG. Wor. c. E. Da. c. Py. Hs/Swdl.1/AD3.6.31. POWER INCREASING EXPERIMENTS. Commencing from standard engine throughout running with open exhaust, we first fitted twin… | ||
| scan0118 | Test results comparing power output and induction pipe depression using an Eagle IX carburetter versus twin carburetters. | ||
| View original record | -2- Hs/Swdl.1/AD3.8.31 contd. Maximum power was finally obtained by using an Eagle IX carburetter having a 1.8" dia. choke, bolted direct to the induction manifold in place of the twin carburetter.… | ||
| scan0119 | Graph showing power loss to a standard exhaust system for engine SS-15, plotting Brake Horse Power against engine RPM. | ||
| View original record | POWER LOSS TO STANDARD EXHAUST SYSTEM (S.S.) ENGINE No SS-15 (STANDARD) CURVES CORRECTED TO N.T.P. BRAKE HORSE POWER. R.P.M. OF ENGINE. OPEN EXHAUST. SWAN NECK & MAIN SILENCER REMOVED. COMPLETE… | ||
| scan0120 | Graph of Phantom II power curves with an open exhaust, comparing two different camshaft configurations. | ||
| View original record | CURVE I PH. II POWER CURVES OPEN EXHAUST 4:6 COMP. RATIO A. TWIN CARB. 1.30" CHOKES (STD COMP. RATIO)(R TYPE 110° CAMSHAFT) B. " " " " ( " " " )(STD CAMSHAFT) B H P R P M A B R.L.S. 3-6-31 | ||
| scan0121 | Graph comparing B.M.E.P. curves for a Phantom II engine with standard versus 'R Type' camshafts. | ||
| View original record | CURVE 1A PH.II B.M.E.P. CURVES OPEN EXHAUST 4.6:1 COMP. RATIO A. TWIN CARBS 1.3 DIA: CHOKES. (STD COMP. RATIO) (R TYPE 110° CAMSHAFT) B. " " " " " ( " " " ) (STD: " " ) R.W.S. 3-6-31 | ||
| scan0122 | Power curves for a Phantom II Standard Engine, comparing performance with the silencer cut-out open versus shut. | ||
| View original record | CURVE 2 P.II. POWER CURVES. STANDARD ENGINE. A. TWIN CARBS. 1.300" CHOKES. COMPLETE SILENCER. CUT OUT OPEN. B. " " " " CUT OUT SHUT. B.H.P. R.P.M. LWS 3-6-31 | ||
| scan0123 | Graph of Brake Mean Effective Pressure (B.M.E.P.) vs engine speed (R.P.M) for a PII standard engine with two different exhaust configurations. | ||
| View original record | CURVE 2A. PII B.M.E.P CURVES STANDARD ENGINE A. TWIN CARBS. 1.300 CHOKES (COMPLETE SILENCER CUT OUT OPEN.) B. " " " " " ( " " CUT OUT SHUT) BMEP R.P.M. A B R.W.S. 3-6-31 | ||
| scan0124 | Graph of PII power curves for various carburettor and camshaft configurations, all taken with open exhaust. | ||
| View original record | CURVES(3) P II POWER CURVES, ALL TAKEN WITH OPEN EXHAUST (A) RR.CH. EAGLE IX CARB (4·9:1 COMP RATIO) (R TYPE 110° CAMSHAFT) (B) TWIN CARBS 1·4 CHOKES ( " " ) ( " " ) (C) " " 1·3 " (STD COMP RATIO)… | ||
| scan0125 | Graph of BMEP curves versus RPM for four different carburettor and camshaft configurations, all tested with open exhaust. | ||
| View original record | CURVE (3A) PII BMEP CURVES. ALL TAKEN OPEN EXHAUST. (A) R.R.C.H. EAGLE IX CARB. (4.9:1 COMP RATIO)(R.TYPE 110° CAMSHAFT) (B) TWIN CARBS 1.4 CHOKES ( " " )( " " ) (C) TWIN CARBS 1.3 CHOKES (4.6:1 STD.… | ||
| scan0126 | Camshaft design, compression ratios, and fuel mixtures to achieve high engine power. | ||
| View original record | HS. } FROM R. BY. } X7771 R2/M5. 6. 31. C. to SG. WOR. RHC. re. HIGH POWER FROM P. 2. X.7090. X.7771. E. will send the technical data upon which the design of the camshaft referred to in my memo. of… | ||
| scan0127 | The horsepower required for a Phantom II to achieve 100 M.P.H. and a comparison to Bentley's 8-litre engine. | ||
| View original record | To E. From Hs/Rm. c. to Sg. Wor. Hs/Rm.7/KT. 8.6.31. H.P. REQUIRED ON P.II. TO ACCOMPLISH 100 M.P.H. With reference to E4/M2.6.31. we think that undoubtedly the best method of getting the figures you… | ||
| scan0128 | Feasibility and limitations of increasing the Phantom II's compression ratio. | ||
| View original record | To R. from Hs. c. SG. c. WOF. E. c. Da. EV. 87771. Hs2/AD11.6.31. 8777° PHANTOM II. 6 : 1 COMPRESSION RATIO. In a recent memo you asked for P.2. to be fitted up with 6 : 1 compression ratio. We have… | ||
| scan0129 | Test report on the improved high-speed performance of a Phantom II car (27-EX) at Brooklands. | ||
| View original record | To R. From Hs/Ltd. c. to Sg. Wor. c. to E. Da. c. to By. PHANTOM II IMPROVED HIGH SPEED PERFORMANCE. We have taken 27-EX. car to Brooklands to ascertain the improvement in high speed performance due… | ||
| scan0130 | Various engine troubles and failures experienced with a vehicle during testing. | ||
| View original record | -2- to turn the flywheel round, quite easily, the front end of the crankshaft remaining stationary. The car was then put on the rail at Weybridge station. It has not yet arrived at Derby so the extent… | ||
| scan0131 | Performance test results for car 27Ex. at Brooklands, including an acceleration graph. | ||
| View original record | 27Ex. CAR: PERFORMANCE TESTS ON BROOKLANDS. 10TH JULY 1931. R.R. TWIN CHOKE CARBURETTER. R ENGINE CAMSHAFT (110°) COMPRESSION RATIO 4 . 8 : 1 REAR AXLE RATIO STANDARD. (3.727:1) CAR WEIGHT COMPLETE 46… | ||
| scan0132 | High power camshaft tests, comparing timing and performance of Phantom II and China 25HP engines. | ||
| View original record | To R. from Hs/Rm. c. SE. Nor. c. DS. H. c. Ev. OR/Y7771 Hs/Rm2/AED. 5. 31. Y7090 HIGH POWER CAMSHAFT P.II. We have now run a number of tests on the new 120° camshaft to LeC.2918. The best power we… | ||
| scan0133 | Engine valve and camshaft testing to improve power and efficiency. | ||
| View original record | -2- It will be seen from the above tabulated figures that the velve area and lift are relatively very much the same for both engines. We carried out some tests on the 25 HP. unit with a view to… | ||
| scan0134 | Tabulated list comparing valve openings, lift, and area for various engines. | ||
| View original record | TABULATED LIST OF VALVE OPENINGS. engine Dia. of inlet valve. Lift of inlet valve Ratio Lift Valve Dia. Valve area per litre disp. F. engine 1.625 .550 .337 2.20 R. engine 1.950 .570 .292 1.84 25 HP.… | ||
| scan0135 | Graph of Power Output (BHP) and Induction Pipe Depression vs R.P.M. for a China Unit 3.25 Bore engine. | ||
| View original record | CURVE I POWER OUTPUT LONG DURATION CAMSHAFT. CHINA UNIT 3.25 BORE. 116° CAMSHAFT 5-1 C/R ZENITH TRIPLE DIFFUSER CARB ON EXHAUST SIDE OF BLOCK. B.H.P. R.P.M. B.H.P./LITRE 23.6 INDUCTION PIPE DEPN… | ||
| scan0136 | Performance graph showing the effect of increasing valve lift on a 'China' engine. | ||
| View original record | CURVE II EFFECT OF INCREASING VALVE LIFT ON CHINA ENGINE. ENGINE UNIT C.9 CHINA ACCURATE C/R 5.35-1 SINGLE S.V. 1 5/8" CARB. OPEN EXHAUST 110° SHAFT. INDUCTION PIPE DEPRESSION. INS/HG B.H.P. B.M.E.P.… | ||
| scan0137 | Graph showing the effect of increased valve lift on the Japan engine's performance, comparing standard and increased lift. | ||
| View original record | CURVE III EFFECT OF INCREASED VALVE LIFT ON JAPAN ENGINE. 5.35 C/R TWIN ZENITH 26 M/M CHOKE. P II SHORT TYPE SILENCER 2" DOWNTAKE. 112° CAMSHAFT. ALL TESTS C.O. CLOSED. B.H.P. B.M.E.P. R.P.M. TIMING… | ||
| scan0138 | Analysis of tests on the Phantom II engine to optimize power output by studying the effects of the camshaft. | ||
| View original record | To R. from Hs/Rm. c. Sg. c. WGT. E. c. Dr. RV. Hs/Rm.1/AM18.9.31. POWER OUTPUT P.II. X7090 Attached are the results of a number of tests on the P.II to obtain the best power output with the W.W. 114°… | ||
| scan0139 | Engine performance, comparing various valve sizes, camshafts, and carburetter setups. | ||
| View original record | Ha/Rm.1/AM.8.9.31 contd. -2- Size of Valve. Rm. P20. gives the power obtainable with inlet valves having a throat dia. of 1.680" or approx. 30% smaller than standard. 114° camshaft to E.82448 used… | ||
| scan0140 | Performance graph comparing twin carburettor and standard induction systems by plotting BHP and BMEP against RPM. | ||
| View original record | TWIN R.R-CARBS AND INDUCTION SYSTEM COMPARISON WITH STANDARD RI CARBURETTOR AND INDUCTION SYSTEM TEST BED EXHAUST SYSTEM V1023 BHP RPM BMEP 120 110 100 90 80 70 60 50 40 1000 1500 2000 2500 3000 TWIN… | ||
| scan0141 | Performance graph comparing large and small engine valves based on BHP and BMEP against engine RPM. | ||
| View original record | RM. P.15. COMPARISON OF LARGE & SMALL VALVES 4.78 C.R. W.W. 114" SHAFT LEG 2918 OPEN EXHAUST INS. DEFN. 3000 R.P.M. LARGE VALVES C DENOTES CLAUDEL 1.90 T TWIN CARB 1.4 DIA. CHOKE 2.55 Valve Timing… | ||
| scan0142 | Graph comparing engine performance based on different valve lift specifications and timing. | ||
| View original record | COMPARISON OF VALVE LIFT 114° SHAFT R.M. P.19 LARGE VALVE HEAD. 4.78 C/R 2.0" VALVE THROAT 114° CAMSHAFT E.82448 OPEN EXHAUST TIMING .013 C.L.C.E. I.O. 3° B.T.C E.O. 54° B.B.C I.C. 58.1 P.B.C. E.C.… | ||
| scan0143 | Performance graph comparing different high lift rockers and carburettors. | ||
| View original record | COMPARISON OF HIGH LIFT ROCKERS RM P 20 SMALL VALVE HEAD 4.75 C/R INLET VALVE THROAT 1.680 114° CAMSHAFT E.82448 TIMING AS IN RM P 19 --- VALVE LIFT .525 — VALVE LIFT .470 CLAUDEL CARB. R R TWIN CHOKE… | ||
| scan0144 | Graph showing the effect of increased valve lift on a standard cylinder head at different RPMs. | ||
| View original record | RM P22 EFFECT OF INCREASED VALVE LIFT ON 4.78 C/R STD. CYLINDER HEAD 1.9" DIA. VALVE THROAT 114° CAMSHAFT TO E62448 OPEN EXHAUST VALVE LIFT .525 VALVE LIFT .470 CLAUDEL TWIN CARBS 1.4" CHOKES VALVE… | ||
| scan0145 | Graph comparing engine performance curves (BHP and BMEP) against RPM for three different inlet valve timing configurations. | ||
| View original record | COMPARISON OF VARIOUS INLET VALVE DURATIONS RM. P.23 4.78 C/R. OPEN EXHAUST STD ALUM HEAD RR TWIN CARBS 1-4" CHOKES. 1.5 DIA VALVE THROAT .013 TAPPET CLEARANCE Diagram A: VALVE LIFT .490 IN/EX timing:… | ||
| scan0146 | Performance graph comparing various valve and carburetor configurations with a 1.1/4' camshaft. | ||
| View original record | RM P.24 COMPARISON OF VALVE SIZES W.W 1.1/4" CAMSHAFT 4.78 CR P II UNIT OPEN EXHAUST VALVES 2" THROAT HEADMACHINED TO GIVE A MINIMUM CLEARANCE OF .2" ROUND VALVE STD 1.90 THROATS HEAD STANDARD .013… | ||
| scan0147 | Graph showing the effect of increased valve lift on engine B.HP and B.M.E.P. | ||
| View original record | RM. P.25 EFFECT OF INCREASED VALVE LIFT ON STANDARD CAMSHAFT AND CYL HEAD TWIN CHOKE CARB. 1 1/4" CHOKES. OPEN EXH. 4.78 C/R. STD ALUM HEAD 1.9 VALVE THROAT VALVE LIFT .430 VALVE LIFT .480 .013 CLCE… | ||
| scan0148 | Blueprint for an Inlet Valve (PII) with a 30° seat and small diameter. | ||
| View original record | Hs 372 .150 +-5 .025 CHAMFER AT 45° +-10 +-2° 1.680 DIA +-2 1.500 DIA +-10 1.830 DIA +-2 OTHER DIMENSIONS To E75493 INLET VALVE [30° SEAT SMALL DIA] PII 30° +-1 1/2° | ||
| scan0149 | Test results for the Phantom II engine's power output, focusing on choke sizes, depression, and carburetter setups. | ||
| View original record | To E. from Hs/Rm. PHANTOM II POWER OUTPUT. We have nearly completed the tests you asked for regarding the choke size required to give the 3" depression on the P.2 engine at 1500 R.P.M. and at the same… | ||
| scan0150 | Carburetter types, dimensions, and performance characteristics for various engine models. | ||
| View original record | -2- All we are trying to indicate by sending you these curves is that there is a very real difference between 3" and 2" induction pipe depression and that there are expanding carburetters in existence… | ||
| scan0151 | Graph comparing power output (B.HP and B.M.E.P.) versus R.P.M. for different carburettor setups on a 120° camshaft engine. | ||
| View original record | COMPARISON OF POWER OUTPUT FOR VARIOUS DEPNS ON PT. 120° CAMSHAFT L.E.C. 2918. 4.92 C/R. OPEN EXHAUST. ① CLAUDEL R.R. C.H. EAGLE IX ② SINGLE 1 7/8 THROTTLE DIA. S.U. ③ R.R. TWIN CHOKE 1 1/4 DIA:… | ||
| scan0152 | Increased performance testing of the 27-EX car at Brooklands track with non-standard engine parts. | ||
| View original record | To R. from Hs/Lid. c. Sg. c. Sor. R. c. Da. FW. X.7120. X.7771. X.788. Hs/ Lid.1/AM5.10.31. P.II INCREASED PERFORMANCE. BROOKLANDS 5.10.31. 27-EX car was taken to Brooklands track with the idea of… | ||
| scan0153 | Graph comparing power output with a 5.25 compression ratio, testing different carburettor configurations. | ||
| View original record | COMPARISON OF POWER OUTPUT WITH S.25 COMP. RATIO 114° CAMSHAFT (E.82448) (LONG TYPE SILENCER - CUT OUT OPEN) (DOUBLE VALVE SPRINGS) (STANDARD ROCKERS) ① STANDARD P1 CARBURETTER AND INTAKE SILENCER ②… | ||
| scan0154 | Performance tests for a 27 Ex. Car at Brooklands, showing acceleration, speed, and valve timing. | ||
| View original record | 27 Ex. CAR. PERFORMANCE TESTS ON BROOKLANDS. 5TH OCT. 1931 L.E.C. 2905/6 R.R. TWIN CHOKE CARBURETTER. (MODIFIED TO CURE FLOODING ON CORNERS) WITH AIR SILENCER (EXPTL.) 114° W.W CAMSHAFT. (E.82448)… | ||
| scan0155 | The power curve data for engine 31-GX, showing horsepower at various RPMs. | ||
| View original record | To PN. From Hs. 8771 Hs.5/MJ.2.2.32. The power curve of 31-GX. taken at the engine flywheel with free exhaust, is as follows :- At 750 R.P.M. 46 HP. 1000 62 HP. 1250 79 HP. 1500 91 HP. 1750 104 HP.… | ||
| scan0156 | Power output curves for the Phantom II with various carburetters and the power loss from the silencer. | ||
| View original record | To E. from Hs/Rm. X7771. Hs/Rm.1/ADL2.5.32. POWER OUTPUT - PHANTOM II. X.7771. X.7080. We attach curves of the power output of the Phantom II with various carburetters, which may be of use to you in… | ||
| scan0157 | The advance curve characteristics for the large bore Phantom II engine. | ||
| View original record | x4441 To E. from Hs/Rm. Hs/Rm. 2/KT. 23.5.33. LARGE BORE P.II. ADVANCE CURVES CHARACTERISTICS. We have been taking some ideal advance curves with the large bore Phantom II engine. The attached curve… | ||
| scan0158 | Graph showing various spark advance curves against RPM for the Phantom II No. 25 large bore unit. | ||
| View original record | [ "PHANTOM II No 25 (LARGE BORE UNIT)", "RMP 58", "GR", "S.S.1", "SPARK POSITION", "° ADVANCE OF T.D.C", "STANDARD LONG TYPE", "SILENCER CUT OUT OPEN", "IDEAL MAGNETO CURVE", "AUTOMATIC ADVANCE… | ||
| scan0159 | Acceleration test results for car model 27-EX on Shardlow Road. | ||
| View original record | x7771 To Rm. from Hs/Wynn. 29.6.33. ACCELERATION TESTS ON 27-EX. Weight of car, petrol tank full. Tons. Cwts. Qrs. Lbs. Front. 1 1 1 14. Rear 1 7 0 14. Total 2 8 2 0. Rear Axle Ratio 11 x 41. SHARDLOW… | ||
| scan0160 | Modification to the Phantom II semi-expanding carburetter to prevent flooding on inclines. | ||
| View original record | To E.) from Hs/Wymm BY) & Hs/Swdl. c.c. Slt. c.c. EP. c.c. Mx. Hs/Wymm.2/KT.30.6.33. PHANTOM II SEMI-EXPANDING CARBURETTER. Trouble has been experienced on this type of carburetter with regard to… | ||
| scan0161 | Carburetter level settings, adjustments, and production quality issues. | ||
| View original record | -2- set to 1.375±.025 below the parting surface of the float chamber cover. The level can be accurately set by measurement of the level in the high speed jet adjustment well. (d) After the level has… | ||
| scan0162 | Comparative test results of acceleration times using a new light float versus a standard float in a carburetter. | ||
| View original record | -3- Hs/EWM.2/KT. 30.6.33. COMPARATIVE TESTS WITH NEW LIGHT FLOAT IN CARBURETTER. SHARLOW ROAD. STANDARD FLOAT 1.050" LEVEL. LIGHT FLOAT 1.375" LEVEL. 10-30 MPH. IN. OUT. 9.0 secs 8.6 secs 9.0 8.6 9.0… | ||
| scan0163 | Power curves data for a P. II. No. 7 large bore unit with a semi-expanding carburettor. | ||
| View original record | POWER CURVES ON P. II. NO. 7 LARGE BORE UNIT WITH SEMI-EXPANDING CARB. Standard Float 1.050" Level - Barom. 753. R.P.M. | LOAD. | C/LOAD. | B.H.P. | B.M.E.P. | Galls/Hr | PTS/BHP/Hr | Air Temp. | Ind.… | ||
| scan0164 | Comparison of Phantom II acceleration times for three different experimental car configurations. | ||
| View original record | x7771. 8.8.33. P.II. ACCELERATIONS (underlined) 25-EX. 5-1 c/r. old type camshaft, 11x41 axle. old type carburetter. Complete car wt. 48 3/4 cwt. 19-EX. 5 1/4-1 c/r. new type 114° camshaft. 12x41… | ||
| scan0165 | 8 Litre Phantom exhaust valve failure during power testing and subsequent modifications. | ||
| View original record | FILES. X7771 30.8.33. X.7060. X.7771. 8 LITRE PHANTOM EXHAUST VALVE. Whilst carrying out power tests on P.II. 27 unit and running at 3000 R.P.M. No.6 cylinder exhaust valve head broke away from the… | ||
| scan0166 | Comparative tests between the large inlet valve head and the standard head for the 8 Litre Phantom. | ||
| View original record | X7771 To E. from Hs/Swdl. c. Wor. By. Hs/Swdl.12/KT.28.9.33. 87560 8 LITRE PHANTOM. Comparative tests between the Large Inlet Valve Head (E.83906) and the Standard Head (E.83538). The respective… | ||
| scan0167 | Graph comparing power tests of an 8.1 Litre Phantom engine with various sized inlet valves. | ||
| View original record | H.S. 1147 8.1 LITRE PHANTOM POWER TESTS (P.II N° 27.) COMPARISON BETWEEN VARIOUS SIZED INLET VALVES (STANDARD EXHAUST) 2-1 1/8 S.U. CARBS - STD. CAMSHAFT (F.82448) - COMP RATIO 5.5:1 R.R. LEAD BRONZE… | ||
| scan0168 | Power test graph for the 8.1 litre Phantom engine comparing different carburetor and cylinder head configurations. | ||
| View original record | 8.1 LITRE PHANTOM POWER TESTS (PH NO 25) STANDARD CYLINDER HEAD (E.82758) - COMP RATIO 5.5:1 CAMSHAFT (E.82448) - R.R. LEAD BRONZE BEARINGS H.S. 1191 LARGE SEMI-EXPANDING CARB (LEC 3432) (NO INTAKE)… | ||
| scan0169 | Preliminary experiments on air cleaner dimensions and performance for the Phantom II Tank Engine. | ||
| View original record | X771 To WCR. from E. c.c. U. Hs. Ryg. P. Sft. Mar. E.1/HP.17.10.33. re Phantom 2 Tank Engine. We have made a preliminary experiment for checking the dimensions of the air cleaner required on the… | ||
| scan0170 | Graph showing the differences in horsepower with 'Tank' air filters fitted to a Phantom II carburetter air intake. | ||
| View original record | FILE . 17.10.33 CURVES TAKEN ON UNIT BED SHOWING DIFFERENCES IN HP WITH 'TANK' AIR FILTERS FITTED TO CARBURETTER AIR INTAKE. PHANTOM II. HORSE POWER 140 130 120 110 OPEN 2 FILTERS IN PARALLEL 1 FILTER… | ||
| scan0171 | Acceleration test results for the Continental 40/50 HP Phantom II carburetter. | ||
| View original record | S/W. Hs. from PN. Copy to Sg. C. Wor. EP. Cx. Enquiries are frequently made to our Salesmen in respect of the acceleration on top gear of our latest type Continental 40/50 H.P. Phantom II with… | ||
| scan0172 | Vehicle weight reduction, performance improvements, and comparisons between different chassis models. | ||
| View original record | -2- 26-EX 47 cwt. 3 qrs. 31-GX 43 " 1 qr. 20-MY 48 cwt. 31-GX was interesting as demonstrating how a reduction in overall weight obtained entirely by cutting coachwork weights accounted for a very… | ||
| scan0173 | Reprinted road test review from 'The Motor' magazine, featuring performance graphs for a Phantom II Saloon. | ||
| View original record | Reprinted from The Motor September 24, 1929. NEW ROLLS-ROYCE ON THE ROAD First Road Test by “The Motor.” Features are Excellent Acceleration, Silent Running, Riding Comfort and Unusually Light… | ||
| scan0174 | Article from 'MOTOR SPORT' reviewing a car's performance, featuring an acceleration curve and a photograph. | ||
| View original record | feel the “punch” of the individual cylinders when picking up from a low speed. Actually one feels nothing, so cleverly has the engine mounting and vibration damping been arranged, and the flow of… | ||
| scan0175 | Promotional document for the Phantom II 'Continental' model, including full specifications and a detailed road test review. | ||
| View original record | The "CONTINENTAL" ROLLS-ROYCE SPECIFICATION Engine: Six cylinders in line cast in two groups of three with one piece detachable aluminium head carrying overhead valves in bronze seatings. Valves… | ||
| scan0176 | Comparison of an old type carburetter with an old camshaft and a new type carburetter with a new camshaft. | ||
| View original record | FILES. -------- x7771 6.11.33. -------- x1006 Curve Hs.1196 represents a comparison of the old type carburetter with old camshaft and the new type carburetter with new camshaft brought to the same… | ||
| scan0177 | Power comparison graph for a 7.67 Litre Phantom II engine with an open exhaust, comparing different carburettor and camshaft configurations. | ||
| View original record | 7.67 LITRE PHANTOM (2) POWER COMPARISONS (OPEN EXHAUST) OLD TYPE INDN. SYSTEM I.E. HORIZONTAL CARB WEIR MANIFOLD STD. 116° CAMSHAFT I.O. 13° PTDC E.O. 48° BBDC I.C. 45° PBDC. E.C. 3° PTDC. R.R. SEMI… | ||
| scan0178 | The development and performance comparison of the Phantom I Expanding Carburetter (Lec.3432). | ||
| View original record | X7771 To Sg. From Hw/Bwdl. Cc. Cv. ROT. Cc. EV. HY. Cc. FK. BL. Hw/Bwdl.17/KT.6.11.33. K7090. PHANTOM I EXPANDING CARBURETTER (Lec.3432). Development of this carburetter has been carried out on the 6… | ||
| scan0179 | Carburettor testing, modifications, and performance with an air silencer. | ||
| View original record | -2- HM/Dudl.17/KT.6.11.33. Running with the complete air silencer fitted it was found that the depression at the jet base was .4" H2O higher than in the stand pipe, so that other than there being no… | ||
| scan0180 | Test results for engine silencer performance and power loss at 3000 R.P.M. | ||
| View original record | -3- Hs/BHS.1.17/KCR.6.11.33. LOSS. At 3000 R.P.M. Complete silencer with gauze. 3.5 BHP - 2.6"Hg. " " " with Vokes .050 3 BHP. - 2.6 " " " " .075 4 BHP. - 2.65" " " " End cover removed. 3 BHP. - 2.05"… | ||
| scan0181 | 40/50 model acceleration and maximum speed in relation to different carburettors, axle ratios, and wheels. | ||
| View original record | x7771 To FH. from Hs/Rm. C. Sg. C. C. WGT. EP. C. CX. Ne/Rm.7/KT. 6.11.33. X7120 40/50 ACCELERATION. Referring to FH. 2/WTR.11.33. We should like to separate two points mentioned in your memo - i.e.… | ||
| scan0182 | Recommending acceleration tests and discussing the impact of increased chassis and coachwork weight on performance. | ||
| View original record | -2- Hs/Rm.7/RT.6.11.33. We recommend that we should have 20-MY, fit the lower axle ratio and carry out a few acceleration and high speed tests here before returning it to you for your comments. We… | ||
| scan0183 | Blueprint detailing modifications for a main jet sleeve, including drilling four holes. | ||
| View original record | V1650 4 Holes Drill .1719 Dia. OTHER DIMENSIONS SEE (E83982) MOD'N TO MAIN JET SLEEVE (PH LEC 3432) ROLLS-ROYCE, LTD PRINT ROOM 7 NOV 1933 DERBY. WHP 3-11-33 | ||
| scan0184 | Blueprint showing a modification to a needle valve for a Phantom engine, including diameter and taper dimensions. | ||
| View original record | [ "V1651", "DIA AT LARGE END .168 -1/2", "TAPER 5°-12' INCLUDED", "DIA AT SMALL END .070 -1", "MOD'N TO NEEDLE VALVE (PHANTOM LEC 31,32)", "OTHER DIMENSIONS SEE (E83974)", "ROLLS-ROYCE, LTD.", "PRINT… | ||
| scan0185 | Blueprint of a modification to a carburetor body (Phantom Leg 3432). | ||
| View original record | V1652 MOD'N TO CARB BODY (PHANTOM LEG 3432) ALL OTHER DIMENSIONS SEE (E83947) (SECTION DD) .1378 DIA +2 1.300 ±10 ROLLS-ROYCE, LTD. PRINT ROOM 7 NOV 1933 DERBY. 2-11-33 | ||
| scan0186 | Power curves for an 8-litre engine with a high compression head intended for the Vulture. | ||
| View original record | X7771 To Sg. from Hs/Rm. C. Nor. E. C. Ry. Hn. C. EV. Hs/Rm.19/KT.11.12.33. XC704 We have now taken some power curves with the engine which we propose to fit the the Vulture. This is the 8 litre… | ||
| scan0187 | Power test results for an 8.1 Litre Phantom engine, comparing 5.5:1 and 6:1 compression ratios. | ||
| View original record | HS. 1227 8.1 LITRE PHANTOM POWER TESTS (OPEN EXHAUST) COMPARISON BETWEEN 5.5:1 AND 6:1 COMPRESSION RATIO (A) 6:1 RATIO CYL HEAD - LARGE INLET VALVES TO (Ex. 12011) - 2.000 DIA THROAT 14 M/M SPARK… | ||
| scan0188 | Graph comparing power tests for an 8.1 Litre Phantom engine, contrasting early and late valve timing with an open exhaust. | ||
| View original record | Hs. 1226 8.1 LITRE PHANTOM POWER TESTS (OPEN EXHAUST) COMPARISON BETWEEN EARLY AND LATE VALVE TIMING CURVES WITH 6:1 RATIO HEAD - LARGE INLET VALVES (Ex 12011) 2.000 DIA THROAT 14 M/M SPARK PLUGS KLG… | ||
| scan0189 | Performance graph comparing two different carburettor setups on an 8.1 Litre Phantom engine. | ||
| View original record | HS 1228 8.1 LITRE PHANTOM POWER TESTS (OPEN EXHAUST) COMPARISON BETWEEN 2 SU CARBS AND SEMI EXPDG CARB (LEC 3432) CURVES WITH 6:1 RATIO CYL HEAD - LARGE INLET VALVES (Ex 12011) 2.000 THROAT 14 M/M… | ||
| scan0190 | Comparing the performance of an 8-litre engine against a 7.6-litre unit, mentioning power output and acceleration. | ||
| View original record | To Sg. from Hs/Rm. C. Wcr. E. C. Ry. Rh. C. Ev. Hs/Rm.9/KT.13.12.33. 8 LITRE ENGINE. Referring to Sg7/E12.12.33. The 165 B.H.P. in our memo referred to the 7.6 litre unit. We attach a curve shewing a… | ||
| scan0191 | Performance comparison chart of various Phantom and Vulture engine configurations versus RPM. | ||
| View original record | COMPARISON OF 8 LITRE PHANTOM 6-1 C/R LARGE CARB. LE C 3432 AND 7.6 LITRE PHANTOM 5.25 C/R STANDARD SEMI-EXPANDING CARBURETTER I.E. MY. CHASSIS UNITS COMPARED WITH VULTURE UNIT ALL TESTS 114° CAMSHAFT… | ||
| scan0192 | Power curves of the 8-Litre engine and requesting comparative horsepower data. | ||
| View original record | X7771. To Hs. from Sg. Copy to Wor.E. [Struck through text] re 8-Litre Engine Power Curves. Sg7/E12.12.33 Thanks for Hs/Rm.19/KT.11.12.33. With the carburetter I assume we propose to use, i.e. the… | ||