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).
Performance graph showing Brake Horse Power and Brake Mean Effective Pressure against RPM for specific engine timings and configurations.
| Identifier | ExFiles\Box 13\2\ 02-page113 | |
| Date | 6th July 1931 guessed | |
| B.H.P 30, 50, 70, 90, 110, 130, 150, 170, 190 R.P.M. 500, 1000, 1500, 2000, 2500, 3000, 3500 B.M.E.P 50, 70, 80, 90, 100, 110, 120 BEST TIMING. 114° R.CAM. CAMSHAFT C.I. HEAD 2 1/4" DIA. VALVES SINGLE CLAUDEL CARB. 4.9 CR.{Mr Cra???ster / Mr Chichester} HS{Lord Ernest Hives - Chair} 403 TAPPET CLCE .020" Timing Diagram A: 65.6, 12, 14 Timing Diagram B: 60, 53, 19, 7.5, 67° | ||