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).
Table comparing the fuel consumptions of various series of 'Falcon' engines.
| Identifier | ExFiles\Box 36\2\ scan 041 | |
| Date | 26th April 1917 guessed | |
| -2- COMPARATIVE CONSUMPTIONS OF "FALCON" ENGINES OF VARIOUS SERIES. SPEED | CONSUMPTION (lbs. per B.H.P.H.) R.P.M. | Series 1. | Series 2. | Series 3. | Series 4. | Series 5. 1500 | .555 | .511 1600 | .547 | .502 1700 | .545 | .500 1800 | .548 | .501 1900 | .554 | .505 2000 | .563 | .509 2100 | .574 | .514 2200 | - | .520 2300 | - | .527 Carburetter set for a consumption of | .545 at 1700 R.P.M. | .50 at 1700 R.P.M. | ||