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 comparing the performance of three different induction systems based on induction pipe depression versus engine RPM.
| Identifier | ExFiles\Box 90a\3\ Scan055 | |
| Date | 30th January 1935 | |
| B.V.77 COMPARISON OF INDUCTION SYSTEMS B.2 UNIT | SPECIFICATION - R.H.C/CP 7/EP{G. Eric Platford - Chief Quality Engineer} 30-1-35 AEROLITE PISTONS H1 (170 ozs) E.B. 2050 CYLINDER HEAD | 7.0:1 COMPRESSION RATIO 1.500 DIA INLET VALVES | 1.300 DIA EXHAUST VALVES OPEN EXHAUST | NO AIR SILENCER ① STANDARD INDUCTION SYSTEM; 1.500 DIA. PIPE 1.375 DIA. CARBURRETTERS ② 1.625 DIA. PIPE WITH 1.625 DIA. CARBURRETTERS & .500 DIA. BALANCE HOLE ③ AS ② BUT WITH 1.062 DIA. BALANCE HOLE INDUCTION PIPE DEPRESSION (INS. MERCURY) R.P.M. DM{D. Munro} 2.2.36 | ||