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 Standard Kestrel engine power at various altitudes, plotting corrected brake horse power against altitude in feet.
| Identifier | ExFiles\Box 179b\2\ img079 | |
| Date | 8th August 1923 guessed | |
| STD KESTREL POWER AT ALTITUDE, CORR'D BRAKE HORSE POWER, 300, 400, 500, 600, 700, ALTITUDE IN FEET, 8000, 9000, 10000, 11000, 12000, 13000, 14000, 15000, 16000, ABS. BOOST CORR'N, 25, 30, -1/2 LB, 35, BOOST, ZERO BOOST AS TYPE TESTED, 3000 RPM, 2700, 2500, 2200, 2000, c/ B.H.P, ZERO BOOST, 1 1/2 LB/SQ IN STD, 336 F.{Mr Friese} | ||