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 Brooklands Tests comparing the performance of different cooling fans on a Wraith 80 chassis.
| Identifier | ExFiles\Box 125\3\ scan0130 | |
| Date | 28th June 1939 | |
| BROOKLANDS TESTS FIG. I COMPARISON OF FANS ON CHASSIS 30·G·VII (WRAITH 80) Nº 2 MATRIX - 24·250" X 19·050" X 84 M/M; SHUTTERS FULL OPEN ALLOWANCE 2ºC. MADE FOR DECREASED PUMP FLOW AT HIGH TEMPERATURES STANDARD WRAITH FAN SHORT-BLADED WRAITH FAN WITH INCREASED BLADE SET BUICK FAN NO FAN - M.P.H - RISE °C ABOVE AIR TEMPERATURE | ||