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 plotting Brake Horse Power against engine RPM for various exhaust system configurations on an SS-15 engine.
| Identifier | ExFiles\Box 14\6\ Scan133 | |
| Date | 9th January 1930 | |
| POWER LOSS TO EXHAUST SYSTEM (S.S.) EXHAUST SYSTEM TO N.Sch. 2931/2/47, HAVING CAST ALUMINIUM EXPANSION BOX & SILENCER ENDS. ENGINE N°SS{S. Smith}-15 (STANDARD) (3.0" MANIFOLD PIPE.) CURVES CORRECTED TO N.T.P. BRAKE HORSE POWER. R.P.M. OF ENGINE. OPEN EXHAUST SWAN NECK & MAIN SILENCER REMOVED SWAN NECK REMOVED COMPLETE SYSTEM CUT-OUT CLOSED CUT-OUT OPEN | ||