Graph plotting constant speed petrol consumption (MPG vs MPH) for various vehicle and carburettor configurations.
| Identifier | ExFiles\Box 123\1\ scan0053 | |
| Date | 5th April 1940 | |
| CONSTANT SPEED PETROL CONSUMPTION M.P.G. M.P.H 4 B 50 A. {Mr Adams} CARS SPEC 1 AAX MAIN JETS & 1.35 PROGRAMME JETS, AAY 14 MAIN BODY. TWIN 26mm THROTTLES, PARTLY NO THROTTLE CONNECTION TO MILEAGE DEVICE. B. CARBURETTOR AS ABOVE BUT WITH AN IDENTICAL THROTTLE BODY HAVING 30mm THROTTLES. IN ADDITION IDLE SYSTEMS USED FOR CURVES A AND B. C. A AND B WERE TAKEN IN DIRECT GEAR. C IS AN OVERDRIVE VERSION OF B. D. {John DeLooze - Company Secretary} 1938 BENTLEY "BUICK" ENGINE CAPACITY 4257cc 2240 LBS FT/MILE IN DIRECT. E. {Mr Elliott - Chief Engineer} PHANTOM III 1830 LBS FT/MILE IN DIRECT GEAR. | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).