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 plotting the results of Bentley single-cylinder detonation tests, showing the effect of a sodium-cooled exhaust valve.
| Identifier | ExFiles\Box 134\2\ scan0031 | |
| Date | 23th March 1938 | |
| BENTLEY SINGLE CYLINDER TESTS SHEET 9 V1752. DETONATION TESTS. EFFECT OF SODIUM COOLED EXHAUST VALVE. HIGH POWER CYLINDER HEAD TO L/E C 4075 FLAT HEADED INLET VALVE 1.750 DIA (FLUSH WITH CYL. HD.{Mr Hayward/Mr Huddy}) EXHAUST VALVE 1.500 DIA. ZENITH CARBURETTOR (36 m/m CHOKE). SILENCER FITTED FUEL - N°1 SHELL VALVE TIMING I.O. 2°E.{Mr Elliott - Chief Engineer} I.C. 28°L. E.O. 51°E.{Mr Elliott - Chief Engineer} E.C. 7°L COMPRESSION RATIO 6.23 RANGE OF AUDIBLE DETONATION (FEET). STD. BENTLEY DETONATIONS. SODIUM COOLED EXH. VALVE NORMAL EXHAUST VALVE IGNITION ADVANCE. RPM B.M.E.P. (LBS/SQ.IN.) NECESSARY IGNITION ADVANCE (FLYWHEEL). 23.3.38 | ||