Performance graph comparing two engine configurations, showing power output and mean effective pressure versus RPM.
| Identifier | ExFiles\Box 5a\5\ 05-page189 | |
| Date | 8th December 1931 | |
| R.M. 57 POWER OUTPUT C/D UNIT FOR R.G. IV ① CAMSHAFT E.57177, "O.S" PISTONS E.57122 COMPRESSION RATIO 6.7 - 1 RII SHAFT TYPE 1 1/8 INSIDE DIA. 1 1/4 DIA. Valve Timing Diagram: IN EX 10° 50° .020 CLOSE 35° 45 S ② CH D {John DeLooze - Company Secretary} /A UNIT 5.1 C/R 1.7" LARGER R.R. CARB 1 1/8" SHAFT. STD. 25 H.P Ex. SYSTEM To E.58734 Vertical Axis (Left): B.H.P. Vertical Axis (Right): B.M.E.P. Horizontal Axis: R.P.M. 8.12.31 | ||
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).