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 comparison graph for two different camshaft configurations, plotting BHP and BMEP against RPM.
| Identifier | ExFiles\Box 1\10\ B001_X106 TO X 110-page055 | |
| Date | 21th September 1932 guessed | |
| COMPARISON OF TWO INLET VALVE CAM FORM CAMSHAFT AND INLET AND EXHAUST CAM-FORM CAMSHAFT. BOTH SHAFTS REDUCED TOE. 5.85 C/R OPEN EXHAUST LONG REACH PLUGS SINGLE 1 7/8 THROTTLE S.U. Timing Diagram A: TWO INLETS EX. IN 3, 8, 38, 34 Timing Diagram B: INLET AND EX. EX. IN 3, 8, 40, 39 TOE REDUCED TO .007 TIMINGS TAKEN WITH .013 CLCE. INLET .004 EXHAUST .006 TAPPET CLCE. B.H.P. B.M.E.P R.P.M. 15 M.P.H 25 | ||