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 power losses for a Peregrine engine, comparing Brake Horsepower and Mean Effective Pressure against RPM with various exhaust system components removed.
| Identifier | ExFiles\Box 2\10\ 10-page21 | |
| Date | 29th March 1932 guessed | |
| R.M. P.R. 22 PEREGRINE EXHAUST SYSTEM (STANDARD) POWER LOSSES 5.85:1 COMPRESSION RATIO 14 MM SPARK PLUG HEAD (LODGE A15) SMALL VALVE HEAD (2 EXHAUST VALVES) 108° CAMSHAFT TIMING .020 CLCE IO-2°PTDC EO 39°BBDC. IC-42°PBDC EC 11°PTDC. 2 - 1 1/4 BORE SU CARBS (BALANCED) BY .750 DIAM. HOLE. ① COMPLETE EXHAUST SILENCING SYSTEM ② SWAN NECK & FISHTAIL REMOVED ③ MAIN SILENCER REMOVED ④ SHORT BEND (INTERMEDIATE PIPE) REMOVED ⑤ FRONT EXPANSION BOX REMOVED ⑥ DOWNTAKE PIPE REMOVED NO POWER LOSS TO MANIFOLD (OPEN PORTS AS ⑥) B.H.P R.P.M M.E.P. Lbs/sq" | ||