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 charting the results of detonation tests on an 'F' engine, plotting brake horse power against RPM.
| Identifier | ExFiles\Box 36\2\ scan 231 | |
| Date | 21th June 1929 guessed | |
| "F" ENGINE WITH CARBURETTERS IN "VEE" 7/1 COMPRESSION RATIO PISTONS DETONATION TESTS AT 2400 R.P.M. FUEL SHELL 80/20 AVIATION / BENZOLE PLUGS LODGE A 40 MAGNETOS FULLY ADVANCED 40° B.T.D.C. BAR 751 M/M WATER OUTLET 75°C AIR 17.5°C "X" CRITICAL SPEED. DETONATION HEARD CLOSE TO ENGINE "Y" DETONATION HEARD 4 Ft. FROM ENGINE. B.H.P ACTUAL BRAKE HORSE POWER ENGINE R.P.M. "X" POINT "Y" POINT "YY" POINT 1 SLIGHT DETONATION AT 467 B.H.P 2400 RPM 2 NO DETONATION AT 457 B.H.P 2400 RPM | ||