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).
Test results comparing different cooling fans based on maintained water and bonnet air temperatures.
| Identifier | ExFiles\Box 155\1\ scan0140 | |
| Date | 3rd July 1934 | |
| -3- HS{Lord Ernest Hives - Chair}/Std.14/KW.3.7.34. FANS. (1) 30 M.P.H. Full Throttle - Bonnet Shutters closed. Maintained Water Temp. oC. Bonnet Air Temp. (Actual) Top Bottom Mean No Fan 61 49 55 22 59 Std. Fan 50 39 44.5 23 51.5 Lec.3766 Fan 49.5 38.5 44.0 22 46.0 American V.P. Fan 46.5 34.5 41.0 24.5 46.0 (2) 60 M.P.H. Cruising. Top Bottom Mean No Fan 43 36 39.5 21 44 Std. Fan 38.5 31.5 35.0 21 42 American V.P. Fan 39. 33 36 21.5 42 NOTE :- The thermostat shutter control was disconnected throughout all tests and the shutters fixed in full open position. | ||