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 Brake Horse Power vs RPM for two different induction pipe and carburettor configurations on an Engine No IV G-8.
| Identifier | ExFiles\Box 121\2\ scan0141 | |
| Date | 24th December 1929 | |
| INDUCTION PIPE COMPARISON (JAPAN). ENGINE Nᵒ IV G-8 COMPRESSION RATIO = 5.25. 116° CAMSHAFT. OPEN EXHAUST. CURVES CORRECTED TO N.T.P. BRAKE HORSE POWER R.P.M. OF ENGINE INDUCTION PIPES & TWO CLAUDEL-HOBSON CARBS. (AREA PAST CHOKE = .700 □" EACH), THUS:- INDUCTION PIPE & STROMBERG CARB. (AREA PAST CHOKE = .741 □"), THUS:- | ||