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 table for Falcon Series 2 engines showing powers, consumptions, and efficiencies at various speeds.
| Identifier | ExFiles\Box 36\2\ scan 030 | |
| Date | 6th July 1917 guessed | |
| X. 2934 - FALCON ENGINES SERIES 2. POWERS, CONSUMPTIONS & EFFICIENCIES. Speed. R.P.M. | B.H.P. | Torque (lbs-inches) | B.M.P. (lbs/sq.inch) | Petrol consumption (lbs per. B.H.P. hr.) | Brake Thermal Efficiency. ---|---|---|---|---|--- 1400 | | | | .528 | .259 1500 | 200 | 8410 | 122 | .511 | .268 1600 | 213 | 8400 | 121.5 | .502 | .273 1700 | 225.5 | 8370 | 121 | .500 | .274 1800 | 236.5 | 8280 | 120 | .501 | .273 1900 | 246 | 8170 | 118.5 | .505 | .271 2000 | 253 | 7980 | 115.5 | .509 | .269 2100 | 259 | 7780 | 112.5 | .514 | .266 3 X.2934. | ||