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 detailing HP loss at the flywheel due to specific system components at varying R.P.M.
| Identifier | ExFiles\Box 66\2\ scan0022 | |
| Date | 10th February 1925 guessed | |
| (4) LOSS DUE TO PARTICULAR PARTS OF SYSTEM. | | LOSS IN H.P. AT FLYWHEEL. | | | |---|---|---|---|---| | R.P.M. | Loss to swan neck Fish tail (3 - 2) | Loss to silencer and baffles. (4 - 3) | Loss to holes in inlet pipe. (5 - 4) | Loss when C.O. is closed rel. to c.o.open (1 - 2) | | 2500 | 9.4 | 1 | 13.5 | 22.4 | | 2250 | 6.55 | 1.2 | 11 | 18.75 | | 2000 | 5.4 | 0 | 11.1 | 16.2 | | 1750 | 4.4 | 0 | 6.4 | 12.7 | | 1500 | 1.6 | .5 | 4.75 | 7.8 | | 1250 | .5 | .6 | 2.6 | 3.7 | | 1000 | .45 | 0 | 2.95 | 1.6 | | 750 | .2 | 0 | 2.0 | 1.4 | MADE AT CROXLEY | ||