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).
Performance and petrol consumption test data for an S.U. carburetter with strong and weak mixtures.
| Identifier | ExFiles\Box 102\1\ scan0029 | |
| Date | 13th August 1931 guessed | |
| -2- S.U. Carburetter with plain bonnet. Strong mixture. Air Temp. Water Temp. Lap Time Lap Speed MPH. 1/2 Lap mile time 1/2 Lap mile speed. 20º 84.5º 2-26.8 67.85 20º 84.5º 2-26.6 67.94 S.U. carburetter with plain bonnet. Weak mixture. Air Temp. Water Temp. Lap Time Lap speed MPH. 1/2 Lap mile time 1/2 Lap mile speed. 20º 84.5º 2-29.2 66.76 20º 84.5º 2-30 66.39 26.8 67.16 Petrol consumption tests (Derby to Brooklands). Carried out on standard carburetter 25 HP. 148 miles 7 galls. petrol used = 21.1 M.P.G. (Brooklands to Derby) Petrol consumption test. Carried out on S.U. carburetter, set full weak on control lever. 152 miles. 9 galls. petrol used = 17 M.P.G. Engine Unit C.7. 110º camshaft Std. C/R.{Sir Henry Royce} Std. 25 HP. exhaust system E.55794 arrgt. Std. R.{Sir Henry Royce} series radiator with undented tubes. F.Dodd. | ||