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).
Power comparison graph of three different cylinder head designs, plotting B.M.E.P. and Main Engine B.HP against R.P.M.
Identifier | ExFiles\Box 134\2\ scan0143 | |
Date | 20th August 1937 | |
HIGH POWER HEAD. FIG. VII. POWER COMPARISON OF CYLINDER HEADS. B.M.E.P. MAIN ENGINE B.H.P. R.P.M. ① No. 2 CYLINDER HEAD THROAT AREA = .96 □" EXHAUST VALVE = 1.500" DIA. C.R. = 6.3 ② No. 1 CYLINDER HEAD THROAT AREA = 1.02 □" EXHAUST VALVE = 1.500" DIA. C.R. = 6.2 ③ No. 4 CYLINDER HEAD THROAT AREA = 1.57 □" EXHAUST VALVE = 1.600" DIA. C.R. = 6.3 VALVE TIMING I.O. 2°E; I.C. 28°L; E.O. 51°E; E.C. 7°L. E.D. 20.8.37 | ||