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 for a reduced toe camshaft with large and small valves.
| Identifier | ExFiles\Box 1\10\ B001_X106 TO X 110-page054 | |
| Date | 21th July 1932 | |
| RM.{William Robotham - Chief Engineer} PR.{Percy H. Rose} 25 LARGE & SMALL VALVES. REDUCED TOE CAMSHAFT 5.85 C/R OPEN EXHAUST LONG REACH PLUGS TWO INLET CAMFORMS ------- .125 THROAT INLET _______ .200 " " Valve Timing Diagram: 106° EX IN 8 3 38 34 OLD CLCE. TOE REDUCED TO .007 BY 16/W 21.7.32 CLCE INLET .004 EXHAUST .006 B.H.P. B.M.E.P. 15 M.P.H 25 M.P.H 35 M.P.H 50 M.P.H | ||