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 comparing air temperature rise across a radiator with the bonnet on and off at various road speeds.
| Identifier | Morton\M19\ img290 | |
| Date | 23th September 1931 guessed | |
| 25 EX. COOLING TESTS :- AIR TEMPERATURE RISE ACROSS RADIATOR. AIR TEMPERATURE RISE FROM FRONT OF RADIATOR USING 3 1/2 " HEXAGONAL MATRIX TUBES. Left Graph: BONNET OFF. AVERAGE AIR TEMP: 12.5 °C CYLINDER WATER TEMP:- 57.5 °C CYLINDER WATER TEMP:- 85 °C Right Graph: BONNET ON. CYLINDER WATER TEMP CYLINDER WATER TEMP Y-Axis: AIR TEMPERATURE INCREASE (°C) X-Axis: ROAD SPEED (M.P.H.) Axis values: 10, 20, 30, 40, 50, 60 Bottom Legend: AIR TEMP. RISE ACROSS RADIATOR:- 1) LOW WATER TEMP. AIR TEMP. RISE FRONT OF RADIATOR TO FLOORBOARDS: 1) LOW WATER TEMP. Right Graph Note: SHADED AREA REPRESENTS DUE TO EXHAUST AND | ||