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).
Petrol consumption tests for the 37-EX model with various carburettor settings.
| Identifier | ExFiles\Box 93\2\ scan0178 | |
| Date | 5th January 1937 | |
| 308 To Rm.{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer}/GR.{George Ratcliffe}2/JH.5.1.37. PETROL CONSUMPTION TESTS ON 37-EX. STANDARD CARBURETTOR. Main Jets. Byepass jet. AVERAGE SPEED 42 M.P.H. 50 M.P.H. .058 .060 10.5 M.P.G. 9.1 M.P.G. STANDARD. .058 .056 11.3 M.P.G. 9.5 M.P.G. .058 .054 11.9 M.P.G. 9.6 M.P.G. Float mechanism : Altered ratio from 4.6 : 1 to 2.3 : 1, fuel level corrected to .600 and standard petrol pumps mounted on dashboard. E.83210 spring fitted to thermostat in radiator. MAIN JETS BYEPASS JET. AVERAGE SPEED: 50 M.P.H. .056 .054 10.8 M.P.G. Rm{William Robotham - Chief Engineer}/G.Ratcliffe. | ||