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).
Graph showing the effect of increased valve lift on a standard camshaft and cylinder head.
| Identifier | ExFiles\Box 102\5\ scan0137 | |
| Date | 24th June 1932 guessed | |
| RM.{William Robotham - Chief Engineer} P.25 EFFECT OF INCREASED VALVE LIFT ON STANDARD CAMSHAFT AND CYL HEAD TWIN CHOKE CARB. 1 1/4" CHOKES OPEN EXH: 4.78 C/R.{Sir Henry Royce} STD ALUM HEAD 1.9 VALVE THROAT VALVE LIFT .430 VALVE LIFT .480 Valve Timing Diagram: .013 CLCE IN 54 EX 51 58 Left Y-Axis: B.H.P. Values: 80, 90, 100, 110, 120, 130, 140, 150, 160 Right Y-Axis (Outer): B.M.E.P. LBS / □" Values: 60, 70, 80, 90, 100, 110 Right Y-Axis (Inner): INDUCTION DEPN INS Hg Values: 1, 2, 3, 4 X-Axis: R.P.M. Values: 500, 1000, 1500, 2000, 2500, 3000, 3500 | ||