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 camshafts on a GOS-C1 engine.
| Identifier | ExFiles\Box 102\5\ scan0036 | |
| Date | 19th December 1929 | |
| 112° LONG DURATION CAMSHAFT (CHINA) V761 ENGINE N° GOS-C1. STANDARD INDUCTION PIPE. ENLARGED INDN PASSAGE THRO' BLOCK. 17% LARGER 20HP 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. EXHT OPENS 44° BEFORE B.D.C. EXHT CLOSES 4° AFTER T.D.C. STD. (110°) CAMSHAFT, (E54115) 116° CAMSHAFT (E55362) BRAKE HORSE POWER B.M.E.P (LBS PER SQ. IN.) RPM OF ENGINE VALVE TIMING. (.020 CLCE) 116° CAMSHAFT. INLET OPENS 14° AFTER T.D.C. INLET CLOSES 50° AFTER B.D.C. EXHAUST OPENS 44° BEFORE B.D.C. EXHAUST CLOSES 4° AFTER T.D.C. 110° CAMSHAFT. INLET OPENS 10° AFTER T.D.C. INLET CLOSES 32° AFTER B.D.C. EXHAUST OPENS 36° BEFORE B.D.C. EXHAUST CLOSES 2° BEFORE T.D.C. 19-12-29 | ||