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).
List of fans tested, detailing their type and fan tip diameter.
| Identifier | ExFiles\Box 75\3\ scan0155 | |
| Date | 16th December 1924 | |
| X 3438 E7C / T 17 12 24 16.12.24. FAN TESTS. Nos. & Descriptions of fans tested. Fan tip dia. 1. Standard 40/50 six-bladed fan. 22" 2. Standard 40/50 six-bladed fan, with three blades removed. 22" 3. EAC. four-bladed fan. 23" 4. Hispano fan. 17½" 5. High speed 40/50 fan - six blades. 22" 6. Ditto, with three blades removed. 22" (curves not given) 7. Goshawk fan. 18" 8. Fan made to recommendations of Prof. Watts. 22" 9. 2nd. Fan made to recommendations of Prof. Watts, but with swept back blades. 22" 10. Expt. EAC. fan - first modification. 23" 11. Ditto, second modification. 23" 12. Ditto, third modification. 23" } curves to follow EFC. | ||