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 comparing Brake Mean Effective Pressure (B.M.E.P.) against engine speed (R.P.M.) for two different tappet clearance settings.
| Identifier | ExFiles\Box 102\5\ scan0145 | |
| Date | 10th October 1932 guessed | |
| J III R M J 7 VARIATION IN TAPPET CLEARANCE ON THE 112.0° CAMSHAFT 2 EXHAUST CAMS 5.5 C/R 1.050 CHOKES OPEN EXHAUST NO AIR INTAKES. CARBS TO LEC 2924 ① TAPPET CLCE .006 ② TAPPET CLCE .013 B.M.E.P. R.P.M. Y-Axis Values: 80, 90, 100, 110, 120 X-Axis Values: 500, 1000, 1500, 2000, 2500, 3000, 3500 Circular Diagram Values: 85.8, IN, 42.5, .020 CLCE, 48, EX | ||