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).
Comparison of different fan types tested on a Bentley car B.56.BN at Brooklands.
| Identifier | ExFiles\Box 104\3\ scan0233 | |
| Date | 4th May 1937 guessed | |
| SHEET.1. Comparison of Fans at Brooklands on Bentley car B.56.BN.{W.O. Bentley / Mr Barrington} (a) 30 M.P.H. Full Throttle. FAN Critical Air Temperature °C. Std. 25/30. Fan blades. 46.4 RHC.{R. H. Coverley - Production Engineer} pressed Fan blades. 44.2 EW.947 fan blades. 43.6 Std. Bentley fan blades. 43.9 (b), Full Speed (87 M.P.H.) Full Throttle. FAN Critical Air Temperature °C. Std. 25/30 Fan blades. 44.5 RHC.{R. H. Coverley - Production Engineer} pressed fan. blades. 43.5 EW.947 Fan blades. 44.5 Std. Bentley fan blades. 46.0 | ||