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 performance characteristics for various camshaft timings.
| Identifier | ExFiles\Box 13\2\ 02-page130 | |
| Date | 21th August 1931 | |
| RM{William Robotham - Chief Engineer} P17. COMPARISONS VARIOUS TIMINGS W.W. 114. CAMSHAFT. 4.75 C.R. SINGLE CLAUDEL CARB. OPEN EXHAUST. 21/8/31 B.H.P. Timing Diagram 1: IN EX 10.4 5.2 51 62 .013 TAPPET CLCE CAMSHAFT LEC 2918 Timing Diagram 2: IN EX 3 12 54 58 EXHAUST MANIFOLD OPEN INDUCTION DEPN INS Hg B.M.E.P. Timing Diagram 3: IN EX 5 19.5 47 66.3 .013 TAPPET CLCE 20/8/31 INLET VALVE DIA 2.0" THROAT INLET VALVE LIFT .470 EX LIFT .460 R.P.M. | ||