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).
Blueprint graph of 25EX cooling tests comparing air temperature rise with the vehicle's bonnet on and off.
| Identifier | ExFiles\Box 182\M19\ img290 | |
| Date | 23th September 1931 guessed | |
| 25EX. COOLING TESTS:- AIR TEMPERATURE RISE ACROSS RADIATOR AIR TEMPERATURE RISE FROM FRONT OF RADIATOR USING .312" HEXAGONAL MATRIX TUBES. BONNET OFF AVERAGE AIR TEMP: 12.5°C CYLINDER WATER TEMP:- 57.5°C CYLINDER WATER TEMP:- 85°C BONNET ON AVERAGE AIR TEMP... CYLINDER WATER TEMP... AIR TEMPERATURE INCREASE (°C) ROAD SPEED (M.P.H.) SHADED AREA REPRESENTS DUE TO EXHAUST AND... AIR TEMP. RISE ACROSS RADIATOR:- AIR TEMP. RISE, FRONT OF RADIATOR TO FLOORBOARDS: I) LOW WATER TEMP: I) LOW WATER TEMP. | ||