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 the effect of dual ignition on detonation for a Bentley single cylinder engine with a No. 2 Ramp Head.
| Identifier | ExFiles\Box 133\2\ scan0095 | |
| Date | 13th November 1934 guessed | |
| BENTLEY SINGLE CYLINDER TESTS SHEET 12 EFFECT OF DUAL IGNITION ON DETONATION, - N°2 RAMP HEAD. (SEE ALSO SHEET 11) EXHAUST SILENCED TO DETECT DETONATION N°2 RAMP HEAD (T.C. 3871) COMPRESSION RATIO = 6.5 INLET VALVE = 1.500" DIA EXHAUST VALVE = 1.400" DIA NATURALLY ASPIRATED AEROLITE PISTON FUEL = N°1 SHELL AUDIBLE RANGE OF DETONATION (FEET) B.M.E.P. (LBS/SQ. IN.) R.P.M. VALVES TIMED FOR MAX. POWER AT 3000RPM ONE PLUG. TWO PLUGS. VALVES TIMED FOR MAX. POWER AT 4000RPM ONE PLUG. TWO PLUGS. | ||