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).
Graph of engine performance curves showing various pressures, volumetric efficiency, and mean effective pressure against engine RPM.
| Identifier | ExFiles\Box 180\M4\M4.2\ img035 | |
| Date | 10th March 1924 | |
| ENGINE Timing Diagram: T.D.C (Top Dead Center) I.O. (Inlet Opens) E.C. (Exhaust Closes) 225° 45° 40° 220° E.O. (Exhaust Opens) B.D.C (Bottom Dead Center) I.C. (Inlet Closes) Graph Curves: I.M.E.P (Indicated Mean Effective Pressure) B.M.E.P (Brake Mean Effective Pressure) AVERAGE PEAK EXPLOSION PRESSURE COMPRESSION PRESSURE INDICATED VOLUMETRIC EFFICIENCY Y-Axis Labels: I.M.E.P AND B.M.E.P LBS/SQ' EXPLOSION PRESSURE LBS/SQ' COMPR. PRESSURE LBS/SQ' VOL EFF % X-Axis Label: ENGINE R.P.M. Footer: WITH ORIGINAL R.A.E INDICATOR | ||