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).
Temperature test results comparing a six-bladed fan and a three-bladed fan with shutters open and closed.
| Identifier | ExFiles\Box 75\3\ scan0122 | |
| Date | 8th July 1924 | |
| 8.7.24. Tests made in 3rd. Gear. - speed 42 m.p.h. SIX BLADED FAN. Shutters open - av. highest temp. top 96.1°C. bottom 85.8°C. Shutters closed - " " top 96.9°C. bottom 86.7°C. THREE BLADED FAN. Shutters open - av. highest temp. top 94.5°C. bottom 85°C. Shutters closed - " " top 96.4°C. bottom 86.4°C. ------------------ Hs{Lord Ernest Hives - Chair}/RB.{R. Bowen} | ||