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).
Performance graph comparing Brake Horse Power and B.M.E.P. for different camshaft and high compression configurations.
| Identifier | ExFiles\Box 102\5\ scan0035 | |
| Date | 24th April 1930 | |
| 112° CAMSHAFT & HIGH COMPRESSION "CHINA". ENGINE N° GOS-C1. STANDARD INDUCTION MANIFOLD. STANDARD CARBURETTOR (1 7/8%). COMPRESSION RATIO = 5.75 OPEN EXHAUST. 112° CAMSHAFT, E55640. INLET OPENS 6° AFTER TDC. INLET CLOSES 42° AFTER BDC. EXHAUST OPENS 41° BEFORE BDC. EXHAUST CLOSES 6° AFTER TDC. STANDARD ENGINE, 5.25 C.R. 110° CAMSHAFT. I.O. 10° AFTER T.D.C. I.C. 32° AFTER B.D.C. E.O. 36° BEFORE B.D.C. E.C. 2° BEFORE T.D.C. 116° CAMSHAFT, E55362. I.O. 12° AFTER T.D.C. I.C. 50° AFTER B.D.C. E.O. 43° BEFORE B.D.C. E.C. 5° AFTER T.D.C. Graph Labels: 112° CAMSHAFT 116° Axes: Left Y-Axis: BRAKE HORSE POWER. Right Y-Axis: B.M.E.P. (LBS PER SQ. IN.) X-Axis: R.P.M. OF ENGINE. Signature in bottom right: APB 24-4-30 | ||