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 engine compression pressures versus RPM, comparing different camshaft configurations.
| Identifier | ExFiles\Box 102\5\ scan0031 | |
| Date | 25th April 1930 | |
| 25-4-30 V841. 112° CAMSHAFT - COMPRESSION PRESSURES ENGINE N° Gos-C1. STANDARD INDUCTION SYSTEM. COMPRESSION RATIO = 5.75. CURVES ARE CORRECTED TO N.T.P. & GIVE AVERAGE VALUES OF SIX CYLINDERS COMPRESSION PRESSURES (Lbs/□") R.P.M. OF ENGINE. 116° CAMSHAFT STANDARD ENGINE, 110° CAMSHAFT & 5.25 C.R. FOR VALVE TIMINGS SEE V840. | ||