Performance graph comparing different camshaft configurations for Engine No GOS-C1.
| Identifier | ExFiles\Box 102\5\ scan0027 | |
| Date | 14th December 1929 | |
| 112° LONG DURATION CAMSHAFT (CHINA(Experimental Engine)). ENGINE No GOS-C1. STANDARD INDUCTION PIPE. ENLARGED INDn PASSAGE THRO' BLOCK. 17% LARGER 20 HP R.R. CARBURETTOR. COMPRESSION RATIO = 5.25. OPEN EXHAUST. 112° CAMSHAFT, E55640. INLET OPENS 7° AFTER T.D.C. INLET CLOSES 41° AFTER B.D.C. EXH'T OPENS 44° BEFORE B.D.C. EXH'T CLOSES 4° AFTER T.D.C. Graph Data: STD. (110°) CAMSHAFT (E54115) 116° CAMSHAFT (E55362) Axes Labels: Left Y-Axis: BRAKE HORSE POWER Right Y-Axis: B.M.E.P (LBS PER SQ. IN.) X-Axis: RPM OF ENGINE Table: VALVE TIMING. (.020 CLce) | | 116° CAMSHAFT. | 110° CAMSHAFT. | |---|---|---| | INLET OPENS | 14° AFTER T.D.C. | 10° AFTER T.D.C. | | INLET CLOSES | 50° AFTER B.D.C. | 32° AFTER B.D.C. | | EXHAUST OPENS | 44° BEFORE B.D.C. | 36° BEFORE B.D.C. | | EXHAUST CLOSES| 4° AFTER T.D.C. | 2° BEFORE T.D.C. | | ||
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).