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 data sheet comparing test results for Fan No. 1 and Fan No. 15.
| Identifier | ExFiles\Box 75\3\ scan0076 | |
| Date | 23th March 1925 guessed | |
| X.1017. FAN TESTS. FAN No.1. Fan speed (r.p.m.) | Thrust (lbs) | Power (HP.) | Engine speed (r.p.m.) 200 | 0 | .0158 | 167 400 | .405 | .0617 | 334 600 | 1.000 | .139 | 500 800 | 1.906 | .267 | 667 1000 | 3.094 | .488 | 837 1200 | 4.375 | .810 | 1009. 1400 | 5.688 | 1.200 | 1168 1600 | 7.000 | 1.683 | 1341. 1800 | 9.200 | 2.51 | 1552 2000 | 11.000 | 3.43 | 1805 2100 | 12.000 | 3.97 | 1980 FAN No.15. Fan Speed (r.p.m.) | Thrust (lbs) | Power (HP) | Engine speed (r.p.m.) 1208 | 4.81 | .65 | 1052 2000 | 13.25 | 2.22 | 1774 Handwritten text: X.1017. | ||