Rolls-Royce Archives
| Identifier | Entry | ||
| img001 | Comparison of HP figures for a 40/50 HP engine based on different exhaust pipe and down-pipe schemes. | ||
| View original record | To R from Hs. c. to CJ. RG. c. to E. DA. c. to Dr. Wor. X3056 40/50 H.P. X3056 / X3236 Hs5/L.G1.4.24. We attach sheet giving H.P. figures taken on a 40/50 HP. engine with the present standard scheme… | ||
| img002 | From 'R' to Mr Bowley regarding issues with an old muff shaft coupling's workmanship, grip, and torque limits. | ||
| View original record | Shaft Couplings Dear Mr Bowley from R I cannot believe the old muff Coupling is right unless it has good workmanship, both machining & fitting of keys You report that your work demands greater grip… | ||
| img003 | With suggestions for improving drivetrain components, focusing on shaft diameter, coupling bolts, and material choices to handle torque. | ||
| View original record | alternate(2) With alternate currents the max Torque is limited. I understand to about twice full load torque & does not need slipper drive to prevent excessive strain on skidding wheels The [crossed… | ||
| img004 | Agreeing to a standard design for gear wheels and steel castings. | ||
| View original record | AV. Bailey (2) I agree that our standard [crossed out] gear wheels shall be steel castings we ought to have a standard design & a number of good advances by adding say 10/20% on all proportions such… | ||
| img005 | With a sketch reviewing coupling designs, suggesting modifications to the 'Sellers pattern' and critiquing other work. | ||
| View original record | (3) I have examined one or two other designs of coupling but their seems nothing better than this Sellers pattern. I have thought that we need not go to any expense in making it convenient to remove,… | ||
| img006 | Draft note to Mr. Bentley discussing an alternative design for a coupling. | ||
| View original record | Mr Bentley Coupling: You will perhaps... unscrewable without close fitting key. There is another type which might be tried & would enable you better to make rough as sketch Tight enough by bolts for… | ||
| img007 | Standard hardened shafts and a new design for a 2-ton crab model with enclosed gears. | ||
| View original record | Dear Mr Bentley, I am still pressing for hardened shafts as standard for longitudinal messings wheel dummy on stationary axles because of the low starting effort & wear. I understand we are to make a… | ||
| img008 | Letter discussing staff wages, pay rates, efficiency, and the need for cost justification. | ||
| 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.… | ||
| img009 | Letter from F.H. Royce regarding the design of bolts and pins to prevent failure from eccentric loading, including a sketch. | ||
| 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 to Messrs Royce Ltd detailing conclusions from Mr. Bentley's visit regarding the design of electro-motors. | ||
| 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 | Varnish for impregnating field magnets/coils and the design of the armature shaft and core. | ||
| View original record | -2- Messrs Royce Ld., (contd) field magnets, I think it is absolutely necessary that sufficient capacity of vacuum drying apparatus should be installed, and I think that varnish with a linseed oil… | ||
| img012 | Continued discussion on schemes for repairing shafts, including recommendations on sleeves, armatures, and bearings. | ||
| 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 | Rough pencil sketches of potential vehicle components, including wheels and a radiator/grille. | ||
| View original record | Illegible ghost text from the reverse side of the page. | ||
| img014 | Recommendations on bearing types, shaft materials, and commutator insulation. | ||
| 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 | Typed memorandum discussing specifications for brush holders, 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 | The requirements for a hoist motor and braking system, including automatic stopping and constant speed. | ||
| 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 | Page 7 of a letter concerning the excellent stopping satisfaction of a hoist, signed by F.H. Royce. | ||
| 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 suggesting an alternative method for drying impregnated coils using forced hot air. | ||
| View original record | K. 533. (200 H) D.F. 459. 29.9.11 G. 1999. (ALL COMMUNICATIONS TO BE ADDRESSED TO THE COMPANY.) TELEGRAMS: "SWITCH, MANCHESTER" "ROISDINAMO, LONDON" "ROYCES, ACOCKS GREEN" "ROYCES, GLASGOW" "ROYCES,… | ||
| img019 | Page 4 of a letter to Mr. Bentley from F. H. Royce regarding corrosion issues and an order. | ||
| View original record | E. 97. 150 H (D.F. 299. 15.9.11) G. 1935. -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… | ||
| img020 | Letter proposing a method for drying coils using forced hot air instead of a vacuum. | ||
| View original record | K. 533. (200 11) D.F. 459. 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… | ||
| img021 | Methods for drying and treating coils, referencing wax baths, vacuum processes, and issues with varnish. | ||
| View original record | -2- Mr Bentley (contd) quickly dried without using a very high temperature. The air can be heated before entering 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 run. | ||
| View original record | X.3532. To DA. from EH. c.c. to RHC. EH3/LG19.11.19. 2 EX. RE CAR TO RUN 10,000 MILES. Below is a list of the parts we desire fitting to the chassis which is to run 10,000 miles. 1. Rear Shock… | ||
| img023 | To Mr. Bentley criticizing the current process for manufacturing field coils and suggesting improvements. | ||
| View original record | K. 97. 150 H (D.F. 299. 15.9.11) G. 1935. -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… | ||
| img024 | Condition report on an EX Chassis, detailing component wear, mileage, and fuel consumption. | ||
| View original record | X 3532 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 | Condition of a 2E.X. chassis during a 10,000-mile test. | ||
| View original record | R R. 235 A (100 T) (S.F 846 6-8-19) G. 2460 X. 3056 28.1.20 X3740 - 2E.X. chassis 10,000 miles test. Contd. -2- and back. Car still running very well. X.3751. Wednesday 28th. This morning on starting… | ||
| img026 | Extract from a report detailing issues with Michelin wheels, brake drums, mileage, and petrol consumption. | ||
| View original record | X.3056. 2 EX 11.2.20 EXTRACT FROM REPORT ON 2.EX. X.3482. Have had no further trouble with the nuts working loose on Michelin wheels. It is very difficult to get at the valve on rear wheels owing to… | ||
| img027 | Extract from a report on vehicle 2.EX, detailing mileage, fuel consumption, and engine performance. | ||
| View original record | X.3056 2.EX 4/3/20 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 | 2.EX car's return after a 10,000-mile run in France and proposing a meeting to discuss standardizing parts. | ||
| View original record | To R. from Hs. c. to CJ. c. to BN. c. to Da. ORIGINAL X36 Hs1/LG7.4.20. X.3743 ✓ 2.EX CAR - RUN IN FRANCE. X.3644. This car is now back at the Works after completing 10,000 miles running. The car is… | ||
| img029 | The standardisation of parts, specifically the oil retaining ring and magneto drive, after 10,000 miles of testing on the 2.EX car. | ||
| View original record | 3 To BY. From Hs. C. to BN. C. to DA. C. to EP. C. to Sft. C. to Mr. Willis. C. to Wor. C. to EFC. EFC ORIGINAL APR 16 1920 RECEIVED. Hs1/LG9.4.20. X3743 RE. STANDARDISATION OF PARTS WHICH HAVE RUN… | ||
| img030 | Component troubles with fabric couplings, an air pump, coil, and battery, with proposals for standardisation. | ||
| View original record | R.R. 235 A 100M-S&C 6-8-19) G. 2460. Contd. -2- Hsl/LG9.4.201 serrated one the internal and external serrations shall be cut on the Fellows Gear Cutter. The trouble we have found with the fabric… | ||
| img031 | Numbered list of parts and modifications for an experimental car, intended for standardization. | ||
| View original record | R R. 235 A (100 T) (S.F. 846 6-8-19) G. 2460. Contd. -3- Hs1/LG9.4.20 2. X.34614 New type rear shock absorber. 3. X.3532 Oil Retaining baffles in rear axle. 4. X.3534 New Operating lever for clutch. *… | ||
| img032 | The 10,000-mile test of the 2.EX chassis, detailing battery issues and a list of parts for standardization. | ||
| View original record | R.R. 235 A (100 T) (S.F 846 6-8-19) G. 2460 X.3532 X.3YH3. - 2EX Chassis - 10,000 Mile Test. Contd. -3- Hs1/LG9.4.20. X.607. 5. Smaller size battery. The standard battery we are now using is 55 ampere… | ||
| img033 | Telegram confirmation discussing engine piston rattles and carbon deposit issues. | ||
| View original record | CJ to 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… | ||
| img034 | The performance and wear characteristics of Castrol lubricating oil in experimental vehicles. | ||
| View original record | R.R. 199 (250T) (SD676 19-7-17) MP180865 [Handwritten] CASTROL OIL MAINLY IN 2EX, (ALSO 4EX & 49GB) J OIL CONS. CYL WEAR [Typed] To R. from Hs. c. to CJ. c. to Bn. c. to E. c. to Da. c. to OY. c. to… | ||
| img035 | Properties and performance of lubricating oils, specifically Castrol oil, in gearboxes and cylinders. | ||
| 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 4 EX 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,… | ||
| img037 | Fitting a 1-inch higher radiator and bonnet to a chassis to improve the appearance. | ||
| View original record | To R. from Hs. c. to Cr. c. to EN. c. to E. c. to Da. c. to EY. c. to C. c. to Sp. 4 EX CAR WITH 1" HIGHER RAD & BONNET ORIGINAL SPRINGFIELD CK. Hsl/LG1 7.3.20. x 3426. 1" HIGHER RADIATOR & BONNET.… | ||
| img038 | Review of the Compression Ignition programme, weighing the costs and results of external and internal projects before further investment. | ||
| View original record | ORIGINAL HS. To R. From Hs. c. to Sg. Wor. c. to Rg. E. c. to By. Fl. Hs.2/MJ.30.11.31. COMPRESSION IGNITION ENGINE. It is useful to review the whole of our Compression Ignition Programme. At the… | ||
| img039 | The status and modifications of experimental chassis 7CA and 490B. | ||
| View original record | X452 Wor/Mcr3/L22615. J. June 22nd.1915. In reply to your memo CJ3/1W21615, we wish to report as follows. - Chassis 7CA At the present time we have only two experimental cars at the Works - 7CA and… | ||
| img040 | Internal update on the status of various cars, including a Mercedes, a Delaunay-Belleville, and a Daimler. | ||
| View original record | Wor/McrA/1.22615. 2. chassis, and those that were originally prepared for this car were fitted to 58NA to his instructions and there may be some delay in the Order Office in obtaining a further set.… | ||
| img041 | Page 3 of a letter discussing the sale of an item and notifying the sales department. | ||
| View original record | Wor/Mer3/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 | Policy of sending communications to ex-Derby officials at the Springfield, USA works. | ||
| View original record | To - from Wor. Ag. Ws. Sf. Hs. Hm. Srt. Hy. EC. ST. EW. EP. M. Wor/M30/11/22. I give below copy of memo I have received from Mr. Claude Johnson. Will you please see to it that this instruction is… | ||
| img043 | Difference in piston pinning practices between the American (Springfield) and Derby factories. | ||
| View original record | TO- BJ. FROM R. c. to CJ. HS. BA. c. to BY. EP. OY. ORIGINAL RRLA. HO/SO R3/M28.11.22. DERBY RR/A Inc RE. AMERICAN PRACTICE. X2748 X3666 X.741 Co EX. file We learn from EP. that Springfield have… | ||
| img044 | Routing communications to Springfield through official channels to avoid friction caused by letters sent to private addresses. | ||
| View original record | To Rg. Ws. Sr. Hs. Hm. Sft. Hy. HFC. HWT. EP. HP. WL. - from Wor. Wor3/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… | ||
| img045 | Engine improvements for cold weather and poor fuel, focusing on the exhaust heated throttle and induction system modifications. | ||
| 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 | American modifications to a chassis, including feedback on drawings and a specific point on clutch spigot oiling. | ||
| View original record | TO CJ. FROM R. Copy to R.I. Copy to - HS. re. AMERICAN MODIFICATIONS. +4616 We (RG. E. DA. and R.) spent several hours on these last evening and have passed most things without comment as we really… | ||
| img047 | Continuation page of a document concerning tests on a 20 HP car 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 | Attaching updated horse power charts for 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. Y3056 Hs3/LGM.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 | Comparison of power losses in HP for different exhaust systems on the standard 40/50 model. | ||
| View original record | 1.4.24. 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… | ||
| img050 | Performance chart comparing road wheel brake horsepower against engine RPM for various car configurations, with a table of lap speeds from Brooklands. | ||
| View original record | BROOKLANDS NOV. 1925 TABLE: CONDITION OF CAR | LAP SPEED MILE | HALF MILE High Compn. Sports Car 17 Tooth Axle | 79.2 | 80.4 Standard Condition C.O. Closed | Standard Condition C.O. Open | 80.5 | 82.6… | ||
| img051 | Performance increase from a 110° camshaft on various engines, referencing a 40/50 indicator diagram. | ||
| View original record | To R. from Hs. c. to CJ. c. to RG. c. to E. c. to Da. c. to OY. Handwritten: X3056 Hsl/LG21.12.23. 40/50 INDICATOR DIAGRAM. Handwritten: X3423 (struck through) Handwritten: X3056 X4580 The tests given… | ||
| img052 | Blueprint detailing dimensions for 'Nearest Hook Approach' on an overhead system. | ||
| View original record | 9", Nearest Hook Approach, 2'-3", 2'-0" | ||
| img053 | Blueprint cover for a project for Messrs Pilkington Bros. | ||
| View original record | Floor for - Messrs + Pilkington Bros: | ||
| img054 | Blueprint detailing an overhead crane or hoist system with various components. | ||
| View original record | Platform, Long Drive Motor, C.T. Motor, Hoisting Motor, Electric Brake, CAGE, Opening to face down shop, 5'-0", Highest Position of Hook, Hand..., for, Con..., Lor..., Foo..., 30'-9" centres of Rails | ||
| img055 | General arrangement plan showing an Air Receiver, Air Compressor Cage, and Hose Reel. | ||
| View original record | Cross Wires Air Receiver Plan Air Compressor Cage Hose Reel Scales General Arrangement | ||
| img056 | Blueprint for a gantry crane showing dimensions, driver's cabin, and ladder. | ||
| View original record | 2'-6", 5'-6", 1 1/2, Gantry Rail Level, Ladder, Driver, Resistances, 12", 5'-9", 10", Nearest Hook Approach, 3'-9", 1S/1.31 | ||
| img057 | Blueprint detailing components of a track system including wheels, runners, and bearings. | ||
| View original record | Cast Steel Track Wheels. Cast Steel Runners. 2 fatHs Special flexible, Steel Wire Rope. Ball Swivel Bearing. 3" 4'-3" | ||
| img058 | Blue cover for a document concerning an external warehouse. | ||
| View original record | EXT. WAREHOUSE. 288-65 12 26-1-12 PAN. BY CHT DATE 25 JUL 1977 105 151 1902 | ||
| img059 | Drawing for a 'Royce' 1 Ton Converted Crane. | ||
| View original record | Line. Nº 2 C CRANE. ORIG. REQᴺ Nº 680 24 ORIG. ORDER Nº 293/188 CONVERSION TO 30'-9” REQᴺ 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 a 40/50 HP engine, detailing performance data and valve timing. | ||
| View original record | 40/50 INDICATOR DIAGRAM Data Table: 40/50 110° CAMSHAFT COMPRESSION RATIO 3.9-1 2,000 R.P.M. 77.1 H.P. 13° C AIR TEMP 763 m/m BAR. COOLING WATER 80°C I.M.E.P. 81 LBS/SQ" B.M.E.P. 67.4 LBS/SQ"… | ||
| img061 | Set of three graphs plotting pressure (LBS/D') relative to atmosphere against crankshaft degrees. | ||
| View original record | LBS/D" RELATIVE TO ATMOSPHERE. CRANKSHAFT DEGREES ATS E.C I.O Graph 1 X-axis: 0, 25, 50, 75, 100 Graph 2 X-axis: -10, 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130 Graph 3 X-axis: 0, 10,… | ||
| img062 | Graph of piston displacement and relative pressure against crankshaft degrees. | ||
| View original record | LBS/D" RELATIVE I.O. E.C. E.O. I.C. CRANKSHAFT DEGREES FOR PISTON DISPLACEMENT ATS I.O. E.C. I.C. R.R. DRAWING ROLLS-ROYCE, LIMITED DRAWING ROOM. 20 DEC. 23 DERBY | ||
| img063 | Graph plotting engine revolutions per minute against vehicle speed in miles per hour. | ||
| View original record | SION. REVS: PER MIN. 2000 2250 MILES PER HOUR. 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 ROLLS-ROYCE LIMITED -5 MAY 1921 | ||
| img064 | Blueprint showing a diagram plotted on a grid. | ||
| View original record | 84 69 | ||
| img065 | Performance graph with a dual-scaled Y-axis for M.E.P. (Lbs. Per Sq. Inch) and Ft Lbs. | ||
| View original record | & M.E.P. (LBS. PER SQ. INCH.) FT LBS: 100. 90. 80. 70. 60. 300 270 240 210 180 | ||
| img066 | Graph plotting engine performance curves for Horse Power, Torque, and M.E.P. against revolutions per minute. | ||
| View original record | HORSE POWER & M.E.P. TORQUE REVS: PER MIN: FT LBS: (LBS. PER SQ:) 60. 180 50. 150 40. 120 30. 90 20. 60 500 750 BENCH TEST. - CUT OUT OPEN. - HP BENCH TEST. - CUT OUT CLOSED DYNAMOMETER TEST. CUT OUT… | ||
| img067 | Performance graph showing horsepower curves from bench and dynamometer tests for the 40/50 Chassis E. | ||
| View original record | BENCH TEST - CUT OUT OPEN. - HP CURVE BENCH TEST - CUT OUT CLOSED. - HP CURVE DYNAMOMETER TEST. CUT OUT OPEN. HP CURVE DYNAMOMETER TEST. CUT OUT CLOSED. HP CURVE ROAD SPEED WITH BA ROAD SPEED WITH B… | ||
| img068 | Graph comparing M.E.P. and Torque Curves from Bench and Dynamometer tests with cut-out open and closed. | ||
| 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 ratios. | ||
| View original record | BACK AXLE 16x52. BACK AXLE 15x52. BACK AXLE 14x52. (7.00 TYRES). 1500 1750 2000 ENGINE. - HIGH COMPRESSION. | ||
| img070 | Performance graph plotting M.E.P (Mean Effective Pressure) in LBS Per SQ Inch against Ft Lbs. | ||
| View original record | & M.E.P Ft LBS: 180 60 (LBS. PER SQ. INCH.) 70. 210 80. 240 90. 270 100. 300 | ||
| img071 | Graph comparing Mean Effective Pressure power curves for Goshawk II and 40/50 engines under bench and dynamometer conditions. | ||
| View original record | POWER CURVES GOSHAWK II & 40/50 (26 CU. INS. DISPLACEMENT.) SYSTEMS ON THE BENCH & DYNAMOMETER. CUT OUT OPEN DYNAMOMETER & BENCH TESTS TAKEN FROM THE SAME ENGINES AVERAGE OF 6 CARS OF THE SAME… | ||
| img072 | Performance graph comparing dynamometer and bench horsepower against RPM. | ||
| View original record | ...OMETER HP GII BENCH HP GII DYNAMOMETER 50 1500 R.P.M. 1750 2000 | ||
| img073 | Graph charting test results for six cars for a month ending in February 1923, possibly related to the Goshawk. | ||
| View original record | OF 6 CARS FOR MONTH ENDING FEB. 14.TH 1923. L TESTS & WORKS UNIT TEST. S, THE CURVES BEING AN PERIOD AS THE GOSHAWK. | ||
| img074 | Blueprint graph with data plotted on a grid. | ||
| View original record | 2250 2500 2750 3000 12 LIMITED D. ROOM. 1 MAY. 28 | ||
| img075 | Blueprint graph of Horse Power and Mean Effective Pressure curves for a 4-0/50 engine. | ||
| View original record | M.E.P. & F GII ALL CURVES TAKEN WITH STANDARD EXHAUST SY 4-0/50. 26 CU. INS. DISPLACEMENT. ALL CURVES TAKEN WITH HORSE POWER M.E.P. (LBS PER []') H.P. 40/50 BENCH H.P. 40/50 DYNo 90 88 86 84 82 80 78… | ||
| img076 | Performance graph comparing Bench and Dynamometer Horse Power for a 40/50 HP engine. | ||
| View original record | HORSE POWER M.E.P. (LBS. PER SQ.') Y-AXIS SCALE: 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64 X-AXIS SCALE: 500, 750,… | ||