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 plotting Power & Boost against Altitude for a Kestrel IV Blower on a standard engine.
| Identifier | ExFiles\Box 179b\2\ img077 | |
| Date | 8th August 1923 guessed | |
| KESTREL IV BLOWER ON STD ENGINE POWER & BOOST AT ALTITUDE GEAR RATIO 8.823/1 334 F ALTITUDE FEET 10,000 11,000 12,000 13,000 14,000 15,000 16,000 17,000 18,000 B.H.P. 400 500 600 700 800 C/L B.H.P. 3000 R.P.M. 2500 2200 BOOST 3000 2500 2200 BOOST PRESS ABS INS HG. (CORRECTED) 25 30 35 | ||