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).
Specifications for the 40/50 model's radiator and fan, including water capacity and pulley diameters.
| Identifier | ExFiles\Box 38\2\ Scan199 | |
| Date | 29th September 1923 | |
| X3456 29.9.23. 40/50 - RADIATOR - AND FAN. Y3456 X.3438 Capacity of 40/50 HP. water system -- 7 galls. 3 1/4 pts. Dia. of bottom of crankshaft pulley - 4.837". Dia. of bottom of Fan pulley------- 3.878" DICKINSON BOND | ||