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 showing air temperature rise across the radiator and to the floorboards at various road speeds.
| Identifier | ExFiles\Box 182\M19\ img291 | |
| Date | 23th September 1931 | |
| TEST:- AIR TEMPERATURE RISE ACROSS RADIATOR. AIR TEMPERATURE RISE FROM FRONT OF RADIATOR TO FLOORBOARDS. USING 3 1/2" HEXAGONAL MATRIX TUBES. AVERAGE AIR TEMP: 12.5°C. TEMP:- 57.5°C. TEMP:- 85°C. BONNET ON. AVERAGE AIR TEMP: 13.5°C. CYLINDER WATER TEMP:- 68°C. CYLINDER WATER TEMP:- 85°C. Y-AXIS: AIR TEMPERATURE INCREASE (°C). LEFT X-AXIS: SPEED (M.P.H.). RIGHT X-AXIS: ROAD SPEED (M.P.H.). SHADED AREA REPRESENTS AIR TEMP: INCREASE DUE TO EXHAUST AND ENGINE HEAT RADIATION. LEGEND: ACROSS RADIATOR-. FROM FRONT OF RADIATOR TO FLOORBOARDS:- 1) LOW WATER TEMP. 2) HIGH WATER TEMP:- | ||