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).
Blueprint chart of ignition governor curves for a Bentley standard turbulent head engine.
| Identifier | ExFiles\Box 82\4\ scan0328 | |
| Date | 5th June 1936 | |
| BENTLEY IGNITION GOVERNOR CURVES. STANDARD TURBULENT HEAD. TEST CARRIED OUT WITH SHELL NO.1 AND STANDARD CHASSIS EXHAUST SILENCER. E.B. 2560 STD: PRO: CYL: HEAD. (TURBULENT TYPE) 6.5:1 COMP: RATIO. STD: VALVES 1.6 DIA: INLET. 1.4 DIA: EXHAUST VALVE. ① IDEAL LINE (MINIMUM ADVANCE FOR MAX: POWER.) ② △-△ LINE TO CUT OUT DETONATIONS. ③ x--x 2% POWER DROP BY RETARDING. ④ o---o PROPOSED LINE FOR DELCO REMY AUTO. SPARK POSITION FLYWHEEL °B.T.D.C. ENGINE R.P.M. | ||