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).
Graphs showing radiator, water, and air temperature test results for a 40/50 HP car on a dynamometer.
| Identifier | ExFiles\Box 38\2\ Scan216 | |
| Date | 4th January 1932 | |
| RADIATOR TESTS ON 40/50 HP CAR L49.GBJ 20° metric STD RADIATOR & FAN. THERMOSTAT REMOVED. TESTED ON DYNAMOMETER. CURVES SHOWING THE AMOUNT OF HEAT WHICH THE RADIATOR CAN DISSIPATE. FOR THESE TESTS THE RADIATOR DEPENDS ENTIRELY UPON THE FAN FOR AIR FLOW AS THE CAR IS STATIONARY. Graph 1 (Top): Y-Axis: B.T.U.'s PER MINUTE X-Axis: R.P.M. Lines: HEAT GIVEN TO WATER BY ENGINE AT FULL LOAD HEAT DISSIPATED BY RADIATOR, NO BONNET, STD FAN HEAT DISSIPATED BY RADIATOR WITH BONNET, STD FAN HT DISSIPATED BY RADIATOR WITH BONNET, 3 BLADE FAN Graph 2 (Middle): RADIATOR WATER TEMPERATURES Y-Axis: TEMP °C X-Axis: R.P.M. Lines: WATER TEMP TOP OF RADIATOR WATER TEMP BOTTOM OF RADIATOR Graph 3 (Bottom): AIR TEMPERATURES Y-Axis: TEMP °C X-Axis: R.P.M. ENGINE Lines: TEMP OF AIR UNDER BONNET IMMEDIATELY BEHIND FAN, DURING RUN WITH BONNET DO. WITHOUT BONNET TEMP OF AIR IN FRONT OF RADIATOR TEMP RISE OF AIR ACROSS RADIATOR TEMP RISE WITHOUT BONNET TEMP RISE WITH BONNET L.W.S / 4/1/32 | ||