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 comparing power losses for different Phantom fan configurations against engine RPM.
| Identifier | ExFiles\Box 14\7\ Scan071 | |
| Date | 16th March 1934 | |
| POWER LOSSES WITH PHANTOM FANS LEGEND: (1) - SYM FAN - LFC (2) - ASYM FAN - LFC (STAGGERED BLADES) (3) - PRESENT STANDARD PHANTOM FAN Y-AXIS: POWER LOSS IN DRIVING FAN (B.H.P.) X-AXIS: R.P.M. (ENGINE) DATA POINTS: The graph plots three curves labelled (1), (2), and (3) corresponding to the legend. The Y-axis (B.H.P.) ranges from 6 to 12. The X-axis (R.P.M.) ranges from 2750 to 3250. | ||