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).
Graph of cooling tests showing air temperature rise across the radiator with the bonnet on and off.
| Identifier | Morton\M19\ img288 | |
| Date | 23th September 1931 guessed | |
| 25EX. COOLING TESTS :- AIR TEMPERATURE RISE ACROSS RADIATOR. AIR TEMPERATURE RISE FROM FRONT OF RADIATOR TO FLOORBOARDS. USING .268" HEXAGONAL MATRIX TUBES. BONNET OFF. (AVERAGE AIR TEMP: 11.5°C) CYLINDER WATER TEMP: 53.5°C. --- CYLINDER WATER TEMP:- 81.5°C. - - - AIR TEMPERATURE INCREASE (°C) ROAD SPEED (M.P.H) BONNET ON (A... CYLINDER WATER TEMP:- CYLINDER WATER TEMP:- AIR TEMPERATURE INCREASE (°C) *SHADED AREA REPRESENTS RISE DUE TO EXHAUST AND EN... ROAD SPEED AIR TEMP: RISE ACROSS RADIATOR :- 1) LOW WATER TEMP: AIR TEMP: RISE FRONT OF RADIATOR TO FLOORBOARDS :- 1) LOW WATER TEMP: | ||