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 from a Brooklands test showing top and bottom water temperatures under various fan and radiator conditions.
| Identifier | ExFiles\Box 92\2\ scan0093 | |
| Date | 2nd July 1930 | |
| GRAPH III TEMPERATURE °C 90 85 80 75 70 65 60 ① FULL WEAK NO FAN. ② AS ① BUT MIXTURE NORMAL NO FAN. ③ AS ② BUT FAN SPRING LOADED ④ AS ③ BUT FAN BELT CHOC À BLOC. ⑤ AS ④ BUT FAN 1" NEARER RAD: ⑥ AS ⑤ BUT DOUBLE RAD: OUTLET ⑦ AS ⑥ BUT ALL BONNET SHUTTERS OPEN. TOP WATER TEMP BOTTOM WATER TEMP CONDITIONS FOR TEST ① ALL BONNET SHUTTERS CLOSED STANDARD UNDERSHIELD 62.5 M.P.H. ATS TEMP: 20°C 19 EX. CAR 11 x 41 AXLE BROOKLANDS TEST 2/7/30 | ||