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).
Series of graphs showing radiator performance tests on a 40/50 HP car, measuring heat dissipation and various temperatures under stationary conditions.
| Identifier | ExFiles\Box 24\4\ Scan202 | |
| Date | 26th May 1931 | |
| RADIATOR TESTS ON 40/50 HP CAR [L49.GB] 20" machine 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. B.T.U.s PER MINUTE R.P.M. HEAT UNITS GIVEN TO WATER BY ENGINE AT FULL LOAD HEAT DISSIPATED BY RADIATOR. NO BONNET. STD FAN. HT. DISSIPATED BY RADIATOR. WITH BONNET. STD FAN. HT. DISSIPATED BY RADIATOR WITH BONNET. 3 BLADE FAN. RADIATOR WATER TEMPERATURES TEMP °F R.P.M. WATER TEMP. TOP OF RADIATOR WATER TEMP. BOTTOM OF RADIATOR AIR TEMPERATURES TEMP °F R.P.M. ENGINE TEMP OF AIR UNDER BONNET IMMEDIATELY BEHIND FAN WITH BONNET DO. WITHOUT BONNET TEMP OF AIR IN FRONT OF RADIATOR TEMP RISE OF AIR ACROSS RADIATOR CORE WITH BONNET TEMP RISE WITHOUT BONNET COOLING FAN DRIVING L.B.W. 26/5/31 | ||