Graph showing the effect of increased valve lift on engine performance at a 4.78 compression ratio.
| Identifier | ExFiles\Box 102\5\ scan0135 | |
| Date | 24th June 1932 guessed | |
| RM {William Robotham - Chief Engineer} P22 EFFECT OF INCREASED VALVE LIFT ON 4.78 C/R STD. CYLINDER HEAD 1.9" DIA. VALVE THROAT 114° CAMSHAFT TO E.82448 OPEN EXHAUST VALVE LIFT .525 VALVE LIFT .470 CLAUDEL TWIN CARBS 1.4" CHOKES EX IN 58 54 3 12 .013 CLOSE NO APPRECIABLE DIFFERENCE IN LOW SPEED MEP WITH ALTERATION IN LIFT B.H.P. B.M.E.P. LBS/□" INDUCTION DEPN INS Hg R.P.M. | ||
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).