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 tests for a 'Bensport' car, including temperature and acceleration data after engine modifications.
Identifier | ExFiles\Box 82\1\ scan0065 | |
Date | 25th March 1933 | |
To Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer} From GWH.{George W. Hancock - Head Chateauroux} E By Seen By hotel de France Chateauroux Indre 25.3.33. B E N S P O R T. The car is running very well with the N°5 piston fitted and the copper asbestos joint washer. The compression ratio being reduced there is now no sign of detonation. We have carried out the following tests: RUN OF 12 MILES EACH TEST. Front timing case lagged Radiator shutter held open. M.P.H. AIR OIL WATER 60 10°C 67°C 43°C 70 10°C *73°C 45°C 80 10°C 76°C 45°C Lagging removed from timing case Radiator shutter held open. M.P.H. AIR OIL WATER 60 12°C 62°C 41°C 70 12°C 71°C 46°C 80 13°C 77°C 50°C Acceleration Tests cutout closed MPH SEC MPH SEC 10-20 5 10-20 5 10-30 8 2/5 20-30 4 3/5 10-40 13 30-40 3 1/5 10-50 18 2/5 40-50 5 2/5 10-60 23 50-60 5 10-70 31 4/5 60-70 7 2/5 10-80 44 4/5 70-80 11 10-80 through gears 38 sec. Brooklands figures taken from log book. MPH SEC 10-40 12.6 10-60 23.2 10-80 43.4 10-60 through gears 15.6 sec. | ||