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 showing the power output of a 20-HP engine with different exhaust system configurations.
| Identifier | ExFiles\Box 6\7\ 07-page012 | |
| Date | 1st May 1926 | |
| 20-H.P. ENGINE - POWER OUTPUT WITH VARIOUS PARTS OF THE EXHAUST SYSTEM STD ENGINE 4.75/1 COMPn RATIO BAR 758 M/M.{Mr Moon / Mr Moore} TEMP. 19°C (AIR) B.H.P. R.P.M. SHORT OPEN EXH. PIPES MANIFOLD WITH OPEN EXHAUST PIPE EXH. MANIFOLD WITH TAIL-LESS EXH. PIPE STANDARD SYSTEM (MINUS SILENCER) COMPLETE SILENCER MANIFOLD LOSS RELATIVE TO FREE EXHAUST. STANDARD EXPERIMENTAL ARL 1/5/26 | ||