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 the ground level power of a 1932 standard Kestrel S engine at varying boost pressures and RPMs.
| Identifier | ExFiles\Box 179b\2\ img080 | |
| Date | 8th August 1923 guessed | |
| 337 F STD 1932 KESTREL S GROUND LEVEL POWER AT VARYING BOOST PRESSURES c/BHP 600 500 400 300 ZERO BOOST 3000 RPM 2700 2500 2200 2000 1850 -1/2 Lb ABS. BOOST INS. HG. 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | ||