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 of HP (Horsepower) versus Fan Speed (RPM) for two different fan configurations.
| Identifier | Morton\M8\ img009 | |
| Date | 20th November 1924 guessed | |
| U1 H.P.-FAN SPEED CURVES OF VARIOUS FANS. 1. STD. 4% 6 BLADE FAN. 2. STD. 4% FAN WITH 3 BLADES REMOVED. H.P. 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 R.P.M. 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 | ||