Rolls-Royce Archives
| Identifier | Entry | ||
| img001 | Horse Power figures for a 40/50 HP engine, comparing different exhaust schemes. | ||
| View original record | To R from Hs. c.c. to CJ. AG. c.c. to E. DA. c.c. to DI. Wor. X3056 40/50 H.P. V3056 V32436 Hs5/LG1.4.24. We attach sheet giving H.P. figures taken on a 40/50 HP. engine with the present standard… | ||
| img002 | Memo from 'R' to a Mr Bentley discussing the design and performance of shaft couplings. | ||
| View original record | Shaft Couplings For Mr Bentley Fm R I cannot believe the old one-coupling is right unless it has good workmanship, both machining & fitting of keys Your report that your work demands greater grip than… | ||
| img003 | Torque limits, shaft speed, coupling improvements, and material fatigue. | ||
| View original record | alternate (2) With alternate currents the max Torque is limited I understand to about twice full load Torque & does not need stiffer drive to prevent excessive strain or skidding wheels The cross… | ||
| img004 | The standardization of gear wheels made from steel castings. | ||
| View original record | HV Balty (2) I agree that our standard [crossed out text] gear wheels shall be steel castings we ought to have a standard design & a number of good advantages by adding say. 10/20% on all proportions… | ||
| img005 | With a sketch discussing a coupling design and potential improvements. | ||
| View original record | (3) I have examined one or two other designs of coupling but they seem nothing better than this Selvers pattern. I have thought that we need not go to any expense in making it convenient to remove,… | ||
| img006 | Draft note discussing different key types, sketches, and various mechanical components. | ||
| View original record | A W Bently Coupling You state in your letter unsuitable without the close fitting key. There is another type which might be tried if it would suit you better to send rough as sketch Tight enough to… | ||
| img007 | The design of hardened shafts, wheel housings, and a new 'Crab' model with enclosed gears. | ||
| View original record | Dear Mr Buthly, I am still pressing for hardened shafts as standard for longitudinal wheel housings on dahomey axles because of the ten starting effort & wear. I understand we are to make a new design… | ||
| img008 | Letter concerning employee wages, pay rates, and the need for reductions. | ||
| View original record | Reg. TELEGRAPHIC ADDRESS: "ROYCE, WEST WITTERING." {TWO WORDS ONLY.} TELEPHONE: CHICHESTER 210. STATION—PASSENGER & GOODS: CHICHESTER—7 MILES. SOUTHERN RLY. "ELMSTEAD," WEST WITTERING, NR. CHICHESTER.… | ||
| img009 | Letter with a sketch explaining the necessity of spherical seatings for bolts and pins to avoid stress failure. | ||
| View original record | REG. TELEGRAPHIC ADDRESS: "ROYCE, WEST WITTERING." } TWO WORDS ONLY. TELEPHONE: CHICHESTER 210. STATION - PASSENGER & GOODS: CHICHESTER - 7 MILES. SOUTHERN RLY. "ELMSTEAD," WEST WITTERING, NR.… | ||
| img010 | Letter detailing conclusions on electro-motor design following a visit by Mr Bentley. | ||
| View original record | Copy for Mr Bentley Westwood, Beacon Road West, Crowborough, Sussex, 12th August 1912. Messrs Royce Ld., Trafford Park, Manchester. Dear Sirs, With reference to Mr Bentley's stay here, the following… | ||
| img011 | The merits of different varnishes for field coils and design options for armature shafts. | ||
| View original record | -2- Messrs Royce Ld., (contd) field magnets, I think it is absolutely necessary that sufficie- nt capacity of vacuum drying apparatus should be installed, and I think that varnish with a linseed oil… | ||
| img012 | Shaft repair methods, including continuous sleeves and ball bearing arrangements on motor shafts. | ||
| View original record | -3- Messrs Royce Ld., (contd) of it in spite of the occasional trouble of the extra difficulty of repairing a defective shaft. The second scheme is the use of a continuous sleeve possibly made out of… | ||
| img013 | Pencil sketches of vehicle components, possibly chassis and engine elements. | ||
| View original record | Illegible background text with pencil sketches drawn over it. | ||
| img014 | The selection of bearings, shaft materials, and mica for commutators. | ||
| View original record | -4- Messrs Royce Ld., (contd) very practical, and I do not like to recommend anything of a more complicated nature. Should ball thrust bearings be required and only for small end pressure I recommend… | ||
| img015 | Continued technical memorandum discussing specifications for brush holder spindles, end bearings, and hoist mechanisms. | ||
| View original record | -5- Messrs Royce Ltd(contd) be worth the extra money spent upon it. With reference to the brush holder spindles, these should in all cases be very substantial & rigid so as to keep the carbon brushes… | ||
| img016 | Requirements for a hoist motor and braking system, including Mr. Bentley's ideas. | ||
| View original record | -6- Messrs Royce Ld (contd) a motor. This will require a machine amply large enough for the work which is the sine qua non of a getting a constant speed machine. I, therefore, urge upon you the… | ||
| img017 | The concluding page of a letter signed by F. H. Royce discussing a hoist. | ||
| View original record | -7- Messrs Royce Ld(contd) a hoist which will give excellent satisfaction with regard to stopping, and I do not think that anybody will be able to beat us on this point, if we really set our minds to… | ||
| img018 | Letter proposing a method of drying impregnated coils using forced hot air instead of a vacuum. | ||
| View original record | K. 533. (200 II) D.F. 458. 29.9.11 G. 1999. (ALL COMMUNICATIONS TO BE ADDRESSED TO THE COMPANY.) OFFICES: MANCHESTER TRAFFORD PARK (Registered Office) LONDON 13 WALBROOK, LONDON, E.C. BIRMINGHAM 42… | ||
| img019 | Letter from J.H. Royce to Mr. Bentley discussing corrosion issues and urging vigorous action with the help of chemists. | ||
| View original record | -4- Mr Bentley (contd) draining out you know where you are, but you never know where you are with the troubles of corrosion. Pray be vigorous. spare neither time nor money. Get Mr Claremont or the… | ||
| img020 | Letter proposing a method for drying and impregnating coils using forced hot air instead of a vacuum. | ||
| View original record | K. 533. (200 It) D.F. 458. 29.9.11 G. 1999. (ALL COMMUNICATIONS TO BE ADDRESSED TO THE COMPANY.) OFFICES: MANCHESTER TRAFFORD PARK (Registered Office) LONDON . . . . . 13 WALBROOK, LONDON, E.C.… | ||
| img021 | Typed letter to Mr. Bentley discussing methods for drying and impregnating coils, including wax baths and issues with varnish. | ||
| View original record | -2- Mr Bentley (contd) quickly dried without using a very high temperature. The air can be heated beforeentering the trunk pipe or within the trunk pipe and if you want to make the drying very rapid… | ||
| img022 | List of desired parts to be fitted to a chassis for a 10,000-mile endurance run. | ||
| View original record | X.3532. EH3/LG19.11.19. To DA. from EH. c. to RHC. RE CAR TO RUN 10,000 MILES. 2 Ex. Below is a list of the parts we desire fitting to the chassis which is to run 10,000 miles. 1. Rear Shock Absorbers… | ||
| img023 | Letter to Mr Bentley discussing issues and suggestions for the manufacturing process of field coils. | ||
| View original record | -3- Mr Bentley (contd) justify you having a plant for these, even if you found it was not very practical for the field coils. Surely, the practica-bility could be soon tested, and I should have… | ||
| img024 | Condition report on the 2.EX Experimental Chassis, detailing component performance, wear, mileage, and fuel consumption. | ||
| View original record | X.3532 4 28.1.20. X.3743. 2.EX CHASSIS. X.3441. The ball joints of cross steering tube are just beginning X.3461. to shew signs of wear, also those of the shock absorbers. X.3323. Both foot and hand… | ||
| img025 | Continued report on a 10,000-mile chassis test, detailing performance, component wear, and fuel consumption. | ||
| View original record | K R. 235 a (100 T) (S.F. 846 6-8-19 G 2460) X. 3056 28.1.20 X3740 - 25.E.X. Chassis. 10,000 miles test. Contd. -2- and back. Car still running very well. X, 3751. Wednesday 28th. This morning on… | ||
| img026 | Extract from a report on 2.EE, noting issues with Michelin wheels and brake drums, plus weekly mileage and fuel data. | ||
| View original record | X.3056. 2EX 11.2.20 EXTRACT FROM REPORT ON 2.EE. ------------------------------ X.3482. Have had no further trouble with the nuts working loose on Michelin wheels. It is very difficult to get at the… | ||
| img027 | Extract from a report on vehicle 2.EX detailing mileage, fuel consumption, and a note on piston knock. | ||
| View original record | X.3056 2.EX 4/2/20 Extract from REPORT ON 2.EX. X.3056. Mileage for the eight days 1348 making total 6578 miles. Petrol consumption for eight days 475 litres. Petrol consumption has considerably… | ||
| img028 | The '2.EX CAR' after a 10,000-mile run in France, proposing a discussion on standardizing parts. | ||
| View original record | To R. from Hs. c. to CJ. c. to BN. c. to DN. Handwritten: ORIGINAL & draft X36 hs1/LG 7.4.20 Typed: X.3743 ✓ 2.EX CAR - RUN IN FRANCE. X.3647 This car is now back at the Works after completing 10,000… | ||
| img029 | Standardisation of parts after a 10,000-mile test on the 2.EX car, focusing on the clutch and magneto drive. | ||
| View original record | To B.J. from Hs. C. to Hs. C. to DR. C. to Dft. C. to Mr. Willis. C. to Wor. C. to EFC. EFC ORIGINAL RECEIVED. X3743 RE. STANDARDISATION OF PARTS WHICH HAVE RUN 10,000 MILES ON 2.EX CAR. X.3644 There… | ||
| img030 | Typed memorandum detailing issues and proposed changes for an air pump, coil, battery, and pistons. | ||
| View original record | R.R. 735 A Contd. (IC 1819) C. 2160. -2- Hsl/LC9.4.201 [Handwritten note on right margin: Reply at once] serrated one the internal and external serrations shall be cut on the Fellows Gear Cutter. The… | ||
| img031 | List of proposed part changes and modifications for an experimental car to be standardized. | ||
| View original record | R.R. 525 A 1190 T 18 F. RR 6 S. 18 G. 2460. Contd. -3- x36 Hs1/LG9.4.20. Yd 1. x.34614 2. New type rear shock absorber. x.3532 3. Oil Retaining baffles in rear axle. x.3552 4. New Operating lever for… | ||
| img032 | The 10,000-mile test of the 2EX chassis, detailing battery issues and a list of parts intended for standardization. | ||
| View original record | X.3582 X.3Y43. - 2EX. Chassis - 10,000 mile Test. -3- Contd. Hs1/LG9.4.20. X.607. 5. Smaller size battery. The standard battery we are now using is 55 ampere hour - the one which has been running on… | ||
| img033 | Telegram confirmation regarding engine piston rattles and the suggested repairs. | ||
| View original record | CJ & HS. 2 EX' CONFIRMATION OF TELEGRAM. REPLY PAID. ROYCAR DERBY. HIVES RE BJ AND MADDOCKS REPORT OF RATTLES. HAS THIS PARTICULAR ENGINE PISTONS WHICH HAVE BEEN TURNED DOWN TO AVOID TIGHTNESS THROUGH… | ||
| img034 | The performance of experimental cars using Wakefield's Castrol oil, focusing on engine wear, oil consumption, and its advantages. | ||
| View original record | [Handwritten text at top] CASTROL OIL MAINLY IN 2EX, (ALSO 4EX & 49GB) OIL CONS. CYL WEAR [Printed text] R.R. 199 (250T) (SD676 19-7-17) MP180865 To R. from Hs. c. to CJ. c. to Bn. c. to E. c. to Da.… | ||
| img035 | On Castrol oil performance in gearboxes and engines, noting its low setting point and carbon formation. | ||
| View original record | Contd. -2- Hs2/LG8.6.20. the oils we are at present using. 2. Castrol oil has a very low setting point. When it is used in the gearbox; this is a very great advantage because even if the car, is left… | ||
| img036 | Extract regarding the failure of a brazed brake bracket and the decision to continue with the process. | ||
| View original record | X.3458 Extract from EP/Thn12/F28.6.21. X.3719 X.3458. Brazing brake brackets. They want to continue brazing. 4.EX failed as reported. If no definite failures known of at Derby with brazed type, and… | ||
| img037 | Scheme to fit a 1-inch higher radiator and bonnet to a car. | ||
| View original record | To R. from Hs. c. to C. c. to E. c. to C.K. c. to P.N. c. to Da. c. to EY. c. to C. c. to Sp. [Handwritten annotations at top right]: 4 EX CK CAR WITH 1" HIGHER RAD & BONNET ORIGINAL ER TOOK IT TO… | ||
| img038 | Review of the company's compression ignition engine development programme, its costs, and associated risks. | ||
| View original record | ORIGINAL HS To R. From Hs. c.c. to Sg. Wor. c.c. to Rg. c.c. to By. Fl. COMPRESSION IGNITION ENGINE. It is useful to review the whole of our Compression Ignition programme. At the present time we have… | ||
| img039 | The status of experimental chassis 7CA and delays to chassis 49GB due to required modifications. | ||
| View original record | X492 Wor/Wor3/J.22615. June 22nd.1915. J. In reply to your memo CJ3/IW21615, we wish to report as follows. - Chassis 7CA At the present time we have only two experimental cars at the Works - 7CA and… | ||
| img040 | Status update on various cars including a car for Holmes Bros, a Mercedes Chassis, a Delaunay-Belleville, and a Daimler car. | ||
| View original record | Wor/Hcr&/L.22615. 2. chassis, and those that were originally prepared for this car were fitted to C&NA to his instructions and there may be some delay in the Order Office in obtaining a further set.… | ||
| img041 | Sale of a 'Shop', noting that the Sales department has not yet found a customer. | ||
| View original record | Wor/MerS/L22615. 3. Shop, which we should be very pleased to sell. We notified Sales some time ago re this, giving them particulars of same, but we presume they have not had an opportunity of finding… | ||
| img042 | The policy for private communications between Derby and Springfield officials. | ||
| View original record | To { Messrs. Hs. St. Pl. C. T. EP. W. } - from Wor. Work/W30/11/22. I give below copy of memo I have received from Mr. Claude Johnson. Will you please see to it that this instruction is carried out.… | ||
| img043 | The divergence of American practice from the Derby standard on pinning pistons and piston rings. | ||
| View original record | TO-BJ. FROM R. c. to CJ. HS. DA. c. to HY. MP. OY. ORIGINAL RRLA HO/50 R3/M28.11.22. DERBY RR/A/Inc C to EX file RE. AMERICAN PRACTICE. Y2748 X3666 X.741 We learn from EP. that Springfield have ceased… | ||
| img044 | Forwarding an instruction regarding communication protocols to avoid friction between the Derby and Springfield locations. | ||
| View original record | To - from Wor. [List of initials M, R, C, Hs, Hm, Rt, H, C, L, EP, Ky with a wavy line through them] I give below copy of memo I have received from Mr. Claude Johnson. Will you please see to it that… | ||
| img045 | Engine improvements for cold weather, focusing on the exhaust heated throttle and a new safety feature. | ||
| View original record | (2) are applying to the 40/50, this and many other smaller improve- ments have been introduced. (3) The third point that comes to my mind is that I think we in England and they in America are not… | ||
| img046 | Proposed American modifications to a chassis, considering them a temporary expedient, and commenting on clutch spigot oiling. | ||
| View original record | R3/M3. 12. 12. 24. TO CG. FROM R. Copy to B.I. Copy to - HS. re. AMERICAN MODIFICATIONS. X4616 We (RG. E. DA. and R.) spent several hours on these last evening and have passed most things without… | ||
| img047 | Note on improving the steady riding of the 20 HP car fitted with balloon tyres. | ||
| View original record | contd :- -2- we have lately proved on the 20 HP. which asked for still more effective ones for the steady riding of the car with balloon tyres.) R. | ||
| img048 | Cover note for horse power charts for the Goshawk and 40/50 chassis. | ||
| View original record | To R. from Hs. c. to CJ. c. to E. c. to Da. c. to BY. c. to EP. V3056 Hs3/LG.1.5.23. HORSE POWER - GOSHAWK AND 40/50 CHASSIS. X.4134 X.3056 We attach hereto H.P. charts in connection with the above.… | ||
| img049 | Power losses in different exhaust systems for the standard 40/50 model. | ||
| View original record | POWER LOSSES TO EXHAUST SYSTEMS WITH THE W.W. AND DERBY SCHEMES ON THE STANDARD 40/50 The following figures give the loss in H.P. of the two schemes relative to the standard 40/50 system. The tests… | ||
| img050 | Graph of Road Wheel B.H.P vs Engine R.P.M. and a table of lap speeds at Brooklands. | ||
| View original record | BROOKLANDS NOV 1925 TABLE: CONDITION OF CAR | LAP SPEED | HALF MILE HIGH COMPRN 17 TOOTH AXLE STANDARD CONDITION C.O. CLOSED | 79.2 | 80.4 STANDARD CONDITION C.O. OPEN | 80.5 | 82.6 STANDARD TOURING… | ||
| img051 | Test results for a 110° Camshaft on 40/50 HP, EAC-1, and 20 HP engines. | ||
| View original record | To R. from hs. c. to CJ. c. to RG. c. to E. c. to Da. c. to OY. X3056 Hsl/LG21.12.23. 40/50 INDICATOR DIAGRAM. X3423 X3056 X4550 The tests given in the attached report were taken in connection with… | ||
| img052 | Blueprint detailing dimensions and the nearest hook approach for a gantry or crane. | ||
| View original record | 9", Nearest Hook Approach, 2'-3", 21'-0" | ||
| img053 | Blueprint cover for a document prepared for Messrs Pilkington Bros. | ||
| View original record | Floor for Messrs Pilkington Bros: | ||
| img054 | Blueprint diagram of an overhead hoist, platform, and rail system. | ||
| View original record | Long Drive Motor, Platform, C.T Motor, Hoisting Motor, Electric, Brake, CAGE, Overaly to face, top step, 5'-0", Highest Position of Hook, 30'-9" centres of Rails, Hand..., for..., Con..., Lev...,… | ||
| img055 | General arrangement plan view of an air receiver, air compressor cage, and hose reel assembly. | ||
| View original record | General Arrangement Scales Plan Cross Wires Air Receiver Air Compressor Cage Hose Reel | ||
| img056 | Blueprint showing the general arrangement and key dimensions of an overhead crane system. | ||
| View original record | 2'-6", 5'-6", 5'-9", 3'-9", 10", Gantry Rail Level, Driver, Resistances, Loader, Clearest Hook Approach. | ||
| img057 | Blueprint detailing a mechanical assembly with track wheels, runners, and a ball swivel bearing. | ||
| View original record | Cast Steel Track Wheels. Cast Steel Runners. 2 falls Special flexible Steel Wire Rope. Ball Swivel Bearing. 4'-3" | ||
| img058 | Cover relating to a warehouse extension. | ||
| View original record | EXT. WAREHOUSE. 12 26-1-12 PAN. 288-65 DATE 5 JUL 1977 105 151 1902 | ||
| img059 | Blueprint for a No. 2 C, 1 Ton Converted Crane. | ||
| View original record | Line. Nº2 C CRANE. ORIG. REQ N Nº 680 ORIG. ORDER Nº 293/188 CONVERSION TO 30'-9" REQ N Nº 1268 24-6-13 ORDER Nº 319/121 11-7- 1/2" to 1 Foot "Royce" 1 Ton Converted Crane. | ||
| img060 | Indicator diagram for the 40/50 engine model. | ||
| View original record | 40/50 INDICATOR DIAGRAM 40/50 110° CAMSHAFT COMPRESSION RATIO 3.3-1 2000 R.P.M. 77.1 H.P. 13° C AIR TEMP 763 MM BAR. COOLING WATER 80° C I.M.E.P. 91 LBS/□" B.M.E.P. 67.4 LBSb MECHANICAL EFFICIENCY 74%… | ||
| img061 | Series of three graphs plotting pressure in LBS/sq inch relative to atmosphere against crankshaft degrees. | ||
| View original record | LBS/□" RELATIVE TO ATMOSPHERE CRANKSHAFT DEGREES Graph 1 (Left): Y-Axis: 150, 125, 100, 75, 50, 25 X-Axis: ATS, BDC, TDC, EC, ATC, 25, 50, 75, 100 Graph 2 (Middle): Y-Axis: -10, 0, 10, 20, 30, 40, 50,… | ||
| img062 | Graph plotting crankshaft degrees against piston displacement and relative pressure. | ||
| View original record | Top Right Y-Axis Title: LBS/D" RELATIVE Right Y-Axis Scale: -10, 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180 Left Main Title: CRANKSHAFT DEGREES for PISTON… | ||
| img063 | Graph plotting Revolutions Per Minute against Miles Per Hour. | ||
| View original record | MILES PER HOUR REVS: PER MIN Y-Axis: 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75 X-Axis: 2000, 2250. SION. [Faint Stamp] ROLLS-ROYCE LTD 28 MAY 1928 | ||
| img064 | Blueprint chart showing multiple straight lines plotted on a grid. | ||
| View original record | 64 | ||
| img065 | Performance graph showing M.E.P. (Mean Effective Pressure) and Torque values. | ||
| View original record | 100. 300 90. 270 80. 240 70. 210 & M.E.P. (LBS. PER SQ. INCH.) 60. 180 FT LBS: | ||
| img066 | Graph plotting Horse Power, Torque, and Mean Effective Pressure against engine revolutions per minute under various test conditions. | ||
| View original record | HORSE POWER. & M.E.P. (LBS. PER SQ:) TORQUE FT LBS: REVS: PER MIN: BENCH TEST. - CUT OUT OPEN - HP BENCH TEST - CUT OUT CLOSED DYNAMOMETER TEST. CUT OUT DYNAMOMETER TEST. CUT Axis Values (Horse… | ||
| img067 | Performance graph showing horsepower curves for a 40/50 Chassis E under various test conditions. | ||
| View original record | BENCH TEST.- CUTOUT OPEN - H.P. CURVE. BENCH TEST - CUT OUT CLOSED. H.P. CURVE. DYNAMOMETER TEST. CUT OUT OPEN. H.P. CURVE. DYNAMOMETER TEST. CUT OUT CLOSED H.P. CURVE. ROAD SPEED WITH BA ROAD SPEED… | ||
| img068 | Performance graph showing M.E.P. and Torque curves from bench and dynamometer tests. | ||
| View original record | BENCH TEST - CUT OUT OPEN. M.E.P & TORQUE CURVE BENCH TEST - CUT OUT CLOSED. M.E.P & TORQUE CURVE DYNAMOMETER TEST - CUT OUT OPEN. M.E.P & TORQUE CURVE DYNAMOMETER TEST - CUT OUT CLOSED. M.E.P &… | ||
| img069 | Performance graph for a high-compression engine with different back axle configurations. | ||
| View original record | ENGINE. - HIGH COMPRESSION. BACK AXLE 16x52. BACK AXLE 15x52. BACK AXLE 14x52. (7.00 TYRES). 1500 1750 2000 | ||
| img070 | Performance graph with dual vertical axes for M.E.P. (Mean Effective Pressure) and Torque (Ft Lbs). | ||
| View original record | & M.E.P. Ft Lbs (LBS. PER. SQ: INCH) 60 180 70 210 80 240 90 270 100 300 | ||
| img071 | Graph comparing M.E.P. (Mean Effective Pressure) power curves for the Goshawk II and 40/50 engines from bench and dynamometer tests. | ||
| View original record | POWER CURVES GOSHAWK II & 40/50. (26 Cu. Ins. DISPLACEMENT.) STEMS ON THE BENCH & DYNAMOMETER. CUT OUT OPEN DYNAMOMETER & BENCH TESTS TAKEN FROM THE SAME ENGINES DYNAMOMETER READINGS AVERAGE BENCH… | ||
| img072 | Performance graph plotting horsepower for a GII engine against RPM, comparing bench and dynamometer results. | ||
| View original record | OMETER HP GII BENCH HP GII DYNAMOMETER R.P.M. 1250 1500 1750 2000 | ||
| img073 | Test report graph for 6 cars, including the Goshawk, for the month ending Feb 14th, 1923. | ||
| View original record | OF 6 CARS FOR MONTH ENDING FEB. 14TH 1923. TESTS & WORKS UNIT TEST. THE CURVES BEING AN PERIOD AS THE GOSHAWK. F Sy 'H | ||
| img074 | Blueprint graph with data plotted on a grid with a numbered horizontal axis. | ||
| View original record | 2250, 2500, 2750, 3000. Stamped text: ROLLS-[illegible] LIMITED, [illegible] ROOM., 1 MAY. 23 | ||
| img075 | Performance graph showing Horse Power and M.E.P. curves for a 40/50 engine model with a standard exhaust system. | ||
| View original record | M.E.P. & F, GII ALL CURVES TAKEN WITH STANDARD EXHAUST SY, 40/50. 26 CU. INS. DISPLACEMENT. ALL CURVES TAKEN WITH, HORSE POWER, P (LBS PER D'), H.P. 40/50 BENCH, H.P. 40/50 DYN | ||
| img076 | Performance graph for a 40/50 HP engine, plotting Horse Power and M.E.P. (Mean Effective Pressure). | ||
| View original record | HORSE POWER M.E.P. (LBS PER □") HP 40/50 BENCH... HP 40/50 DYN... 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 500 750 1000 | ||