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 for various silencer configurations on engine unit N.G.8.
| Identifier | WestWitteringFiles\W\May1931-August1931\ Scan052 | |
| Date | 26th June 1933 | |
| EXHAUST BACK PRESSURE CURVES ("JAPAN") ENGINE UNIT NO. G.8. (5.25:1 COMPRESSION RATIO) 112° LONG DURATION CAMSHAFT TWIN-CHOKE ZENITH CARB. SMALL BORE IND. PIPE ALL CURVES TAKEN WITH THREE DOWNTAKE PIPES & FRONT EXPANSION BOX TO V1125 CURVE LABELS: 1) 25 H.P SILENCER, WITH FRONT EXTENSION PIPE REMOVED (SEE V1130), & SWAN-NECK 2) STANDARD 25 H.P SILENCER SWAN-NECK REMOVED 3) 25 H.P SILENCER, WITH FRONT EXTENSION PIPE REMOVED & NO SWAN-NECK 4) SHORT TYPE PH.II SILENCER WITH SWAN-NECK 5) LONG TYPE PH.II SILENCER WITH SWAN-NECK AXIS LABELS: - Y-AXIS: EXHAUST BACK PRESSURE (INCHES MERCURY) - X-AXIS: R.P.M | ||