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 of inlet valve discharge coefficients versus valve lift for car size cylinders on an air blowing rig.
| Identifier | ExFiles\Box 134\2\ scan0060 | |
| Date | 2nd September 1935 | |
| FIG IV AIR BLOWING RIG Nº4 BED INLET VALVE DISCHARGE COEFFICIENTS CAR SIZE CYLINDERS DISCHARGE COEFFICIENT K 50 40 30 20 10 0 NORMAL VALVE LIFT RAMP II 1.6" HIGH POWER I RAMP I RUDGE (2 VALVES) VALVE LIFT - INCHES 0.1 0.2 0.3 0.4 0.5 VALVE DIAMETER 1.75" 1.5" 1.18" VALVES REMOVED R.W.C 2.9.35 | ||