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).
Performance graph comparing the thrust and power of a standard 40/50 fan against an experimental E.A.C. fan at various engine speeds.
| Identifier | ExFiles\Box 66a\3\ scan0119 | |
| Date | 27th March 1925 | |
| 1. STD. 40/50 6 BLADED FAN (DRIVEN WITH 1.20 RATIO) 15 E.A.C. FAN INSTRD. FOR INITIAL PRODUCTION (DRIVEN WITH 1.4 RATIO) POWER TO DRIVE FAN (H.P.) THRUST (lbs. wt.) ENGINE SPEED (r.p.m.) THRUST POWER COMPARISON OF STANDARD 40/50 AND EXPERIMENTAL E.A.C. FAN E.7.C. 27/3/25 | ||