Graph comparing Brake Horse Power and Brake Mean Effective Pressure for large vs small valves under different carburetor configurations.
| Identifier | Morton\M19\ img236 | |
| Date | 20th August 1931 | |
| COMPARISON OF LARGE & SMALL VALVES RM. {William Robotham - Chief Engineer} P.15 4.78 CR {Mr Cra’ster / Mr Chichester} W.W. 114° SHAFT L.E.C. 2818 OPEN EXHAUST INS. DEPN. 3000 RPM LARGE VALVES C DENOTES CLAUDEL 1.90 T TWIN CARB 1.4 DIA CHOKE 2.55 B.H.P. B.M.E.P. LBS/SQ" Valve Timing Diagram: Ex Inl 10 52 76 8 T.O.13. C.E. Key: ① INLET VALVE THROAT 2.00 TREPANNED ROUND PORTS ② INLET VALVE THROAT 1.680 30° SEAT Hs. {Lord Ernest Hives - Chair} 372 Curve Labels: ①C ②C ①T ②T R.P.M Axes Values: BHP: 90, 100, 110, 120, 130, 140, 150, 160, 170 BMEP: 70, 80, 90, 100, 110, 120 RPM: 500, 1000, 1500, 2000, 2500, 3000, 3500 Date: 20/8/31 | ||
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).