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 Ignition Advance versus B.M.E.P. curves for different Aluminium Phantom engine configurations at 1000 RPM.
| Identifier | ExFiles\Box 17\6\ Scan012 | |
| Date | 11th December 1928 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.) ALUM PHANTOM WITH HEAD TO L.E.C. 2230. (COMP. RATIO = 4.85 : 1). ALUM PHANTOM (4.69 : 1) ALUM PHANTOM WITH 1.600 DIA. VALVES. (COMP RATIO 4.69 : 1) IGNITION ADVANCE ON FLYWHEEL (DEGREES) (BOTH IGNITIONS SYNCHRONISED.) | ||