Graph comparing power tests for an 8.1 Litre Phantom engine, contrasting early and late valve timing with an open exhaust.
| Identifier | ExFiles\Box 92\2\ scan0188 | |
| Date | 8th December 1935 | |
| Hs. {Lord Ernest Hives - Chair} 1226 8.1 LITRE PHANTOM POWER TESTS (OPEN EXHAUST) COMPARISON BETWEEN EARLY AND LATE VALVE TIMING CURVES WITH 6:1 RATIO HEAD - LARGE INLET VALVES (Ex 12011) 2.000 DIA THROAT 14 M {Mr Moon / Mr Moore} /M SPARK PLUGS KLG 765A - DOUBLE TAPER VALVE SPRINGS 2 - 1 7/8 BORE SU CARBS - 1 1/4 BALANCE HOLE A IO 6° BTDC EO 58° BBDC IC 48° PBDC EC TDC EARLY TIMING B IO 1.5° PTDC EO 51° BBDC IC 52° PBDC EC 7.5° PTDC LATE TIMING BHP RPM MEP (LBS □") PLR 8-12-35 | ||
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).