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).
Power test curves comparing two SU carburettors with a semi-expanding carburettor on an 8.1 Litre Phantom engine.
| Identifier | ExFiles\Box 123\3\ scan0070 | |
| Date | 8th December 1933 | |
| HS{Lord Ernest Hives - Chair} 1228 8.1 LITRE PHANTOM POWER TESTS (OPEN EXHAUST) COMPARISON BETWEEN 2 SU CARBS AND SEMI EXPDG CARB (LEC 3432) CURVES WITH 6:1 RATIO CYL. HEAD - LARGE INLET VALVES (Ex 12011) 2.000 THROAT 14 m/m SPARK PLUGS KLG 765A - DOUBLE TAPER VALVE SPRINGS. A - 2 - 1 7/8 SU CARBS. 1 1/4 BALANCE HOLE B - 1 SEMI-EXPANDING CARBURETTER LEC 3432 BHP MEP (LBS □") R.P.M. TIMING .020 CLCE IO 6° BTDC EO 58° BBDC IC 48 PBDC EC TDC INDN MAN DEPRESSION INS HG. PAR 8-12-33 | ||