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 comparing power curves for different induction and exhaust systems on a Bentley III engine.
| Identifier | ExFiles\Box 108\2\ scan0202 | |
| Date | 16th January 1939 guessed | |
| INDUCTION SYSTEM COMPARISON. BENTLEY III POWER S. 68. COMP. RATIO 6.6:1 CAMSHAFT. EX.31550 (TIMING @ .030 CLCE.) I.O. 3.5° AT E.O. 41° BB. I.C. 46° AB. E.C. 5° AT. R.M. 522 PISTONS (.170) ① B.III. INDN. SYSTEM. ② WRAITH INDN. SYSTEM. ⓐ OPEN EXHAUST. ⓑ SILENCED. (B II COMPLETE SYSTEM.) B.H.P B.M.E.P RPM | ||