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 comparing car overheating temperatures under various bonnet and undershield ventilation configurations.
Identifier | ExFiles\Box 14\7\ Scan020 | |
Date | 2nd July 1930 guessed | |
GRAPH II STANDARD P.II CABRIOLET 19 E.X. AXLE RATIO 14 x 52 WT. 48 CWT EMPTY. TEMP AT WHICH CAR WILL OVER-HEAT EVENTUALLY (100°C - TOP WATER TEMP) TEMP SCALE: 10°C, 20°C, 30°C, 40°C, 50°C TEST CONDITIONS & RESULTS: STANDARD No VENTILATION: 35°C. REAR BONNET SHUTTERS OPEN ONLY: 37°C. FRONT UNDERSHIELD OFF: 38°C. FRONT BONNET SHUTTERS OPEN ONLY: 38.5°C. FRONT AND REAR BONNET SHUTTERS OPEN: 41°C. LOUVRED BONNET: 41.5°C. LOUVRED BONNET VENTILATED FRONT UNDERSHIELD: 43.5°C. NOTES: FOR THIS TEST CAR DRIVEN AT A STEADY 60 M.P.H. ROUND BROOKLANDS TRACK. C.O. CLOSED. DURING TESTS ATS TEMP AVERAGED ABOUT 21°C. VARYING FROM 17°C TO 24°C (COMPENSATED FOR ON EACH TEST). COMPARISON OF VARIOUS ALTERATIONS TO CAR. STANDARD RAD. 6 m/m 7 1/2 m/m TUBES 4.00" DEEP FRONTAL AREA. | ||