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).
Blueprint graph comparing power curves and camshaft performance for a 500cc Rudge unit.
| Identifier | ExFiles\Box 133\1\ scan0014 | |
| Date | 21th July 1926 | |
| C.H. 500 cc RUDGE UNIT FIG VII POWER CURVES - COMPARISON OF CAMSHAFTS BORE 3.346 STROKE 3.464 C.R. 7.3 VALVE TIMINGS (.020 TAPPET CLCE) CAMSHAFT | I.O. | I.C. | E.O. | E.C. OVERLAP RUDGE | 28° E | 48° L | 50° E | 25° L | 53° MOD I | 19° L | 58° L | 42° E | 8° L | 11° BENT | 4° E | 50° L | 50° E | 7° L | 11° STANDARD RUDGE STANDARD BENTLEY MODIFICATION I Y-AXIS LEFT: B.M.E.P. (LBS/IN²) Y-AXIS RIGHT: B.H.P. Y-AXIS FAR RIGHT: SPEC. CONS. (PT/B.H.P./HR.) X-AXIS BOTTOM: R.P.M. X-AXIS MIDDLE: PISTON SPEED. (FT/MIN) J.H.E. / 21.7.26 | ||