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).
Hand-drawn graph showing petrol consumption at varying speeds with different mixture settings.
| Identifier | ExFiles\Box 78\1\ scan0138 | |
| Date | 1st November 1926 guessed | |
| PETROL CONSUMPTION AT VARYING SPEEDS WITH DIFFERENT MIXTURE SETTINGS. Ignition @ R in Early. Temperature 70°-72°C. On Brooklands. Low Compression. Cricklewood Carburettor Setting. Y-Axis: MILES PER GALLON. X-Axis: MIXTURE. X-Axis Labels: 5 4 3 2 1 STRONG, NORMAL, 1 2 3 4 5 WEAK. Data Series Labels: 15 M.P.H., 20 M.P.H., 30 M.P.H., 40 M.P.H. Footnote: * Probably an experimental error. | ||