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 of exhaust back pressure curves versus RPM for Engine Unit N.R.G8 with various silencer configurations, noted for 'Japan'.
| Identifier | ExFiles\Box 6\7\ 07-page129 | |
| Date | 30th June 1931 guessed | |
| V1160 EXHAUST BACK PRESSURE CURVES (JAPAN) ENGINE UNIT N_R G8. (5.25:1 COMPRESSION RATIO) 112° LONG DURATION CAMSHAFT TWIN-CHOKE ZENITH CARB. SMALL BORE INS. PIPE ALL CURVES TAKEN WITH THREE DOWNTAKE PIPES & FRONT EXPANSION BOX TO V.1125 EXHAUST B~P (INCHES MERCURY) R.P.M. CURVE LABELS: 25 H.P. SILENCER, WITH FRONT EXTENSION PIPE REMOVED (SEE V.1130) & SWAN-NECK STANDARD 25 H.P. SILENCER SWAN-NECK REMOVED 25 H.P. SILENCER, WITH FRONT EXTENSION PIPE REMOVED & NO SWAN-NECK SHORT TYPE R.L.T.I SILENCER WITH SWAN-NECK LONG TYPE R.L.T.I SILENCER WITH SWAN-NECK | ||