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 showing Ignition Advance versus Brake Mean Effective Pressure (B.M.E.P.) curves at 1000 RPM.
| Identifier | ExFiles\Box 42\4\ Scan057 | |
| Date | 11th December 1920 guessed | |
| SHEET.1. IGNITION ADVANCE / B.M.E.P. CURVES FOR 1000 R.P.M. (Corrected to N.T.P.) BMEP (LBS per Sq. In.) IGNITION ADVANCE ON FLYWHEEL (Degrees). (Both Ignitions Synchronised). ALUM PHANTOM WITH HEAD TO LEC 2230 (COMP RATIO. = 4.95 : 1). ALUM PHANTOM (4.69 : 1) ALUM PHANTOM WITH 1.600 DIA. VALVES. (COMP RATIO 4.69 : 1) | ||