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).
Graph showing power absorbed versus thrust for a standard 6-bladed fan compared to the same fan with 3 blades removed.
| Identifier | ExFiles\Box 75\3\ scan0023 | |
| Date | 20th November 1924 | |
| POWER ABSORBED BY VARIOUS FANS AT VARIOUS THRUSTS. 1. STD 40/50 6 BLADED FAN. 2. - DITTO - WITH 3 BLADES REMOVED. Y-Axis Label: H.P. X-Axis Label: THRUST IN LBS. Handwritten in bottom right: H.E.W. 20-11-24 E D.{John DeLooze - Company Secretary} C 20/11/24 Stamped in bottom right: 2011124 Handwritten in top right: D.{John DeLooze - Company Secretary} | ||