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 induction pipe depression against RPM for three different induction system configurations.
| Identifier | ExFiles\Box 85\4\ scan0118 | |
| Date | 30th January 1935 | |
| COMPARISON OF INDUCTION SYSTEMS. B.V.77 B.2 UNIT SPECIFICATION :- R.H.C/CP 7/EP{G. Eric Platford - Chief Quality Engineer} 30-1-35 AEROLITE PISTONS H1 (17.0 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. CARBURETTERS ② 1.625 DIA. PIPE WITH 1.625 DIA. CARBURETTERS & .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 | ||