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 an Aluminium Phantom engine at 1000 RPM.
| Identifier | ExFiles\Box 17\6\ Scan016 | |
| Date | 27th October 1916 guessed | |
| SHEET 4. IGNITION ADVANCE/B.M.E.P. CURVES FOR 1000 R.P.M. ALUM. PHANTOM WITH HEAD TO L.E.C. 2230 (Comp Ratio. = 4.95:1) CORRECTED TO N.T.P. B.M.E.P (LBS PER SQ. IN.) IGNITION ADVANCE ON FLYWHEEL (DEGREES) BOTH IGNITIONS SYNCHRONISED. BATTERY IGNITION ONLY. | ||