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 comparing the open exhaust power curves of a 116° camshaft versus a standard 110° camshaft for a 'China' engine.
| Identifier | WestWitteringFiles\T\2July1929-December1929\ Scan111 | |
| Date | 4th November 1929 | |
| V.739 CHINA ENGINE - CAMSHAFT COMPARISONS ON THE HIGHER OUTPUT ENGINE. OPEN EXHAUST POWER CURVES. ENGINE DETAILS:- COMPN. RATIO 5.25/1. LARGER EX & IN VALVES & PORTS. 4G LARGER POMPR CARB. CYL BLOCK MIXTURE PASSAGE 1.200 DIA. STD. INDN. MANIFOLD. TIMING - 116° CAMSHAFT. TAPPET CLCE = .020. I.O. 15° AFTER T.D.C. I.C. 48° AFTER B.D.C. E.O. 44° BEFORE B.D.C. E.C. 4° AFTER T.D.C. 116° CAMSHAFT E.55362 STD 110° CAMSHAFT. TIMING - 110° CAMSHAFT. TAPPET CLCE = .020 I.O. 14° AFTER T.D.C. I.C. 33° AFTER B.D.C. E.O. 33° BEFORE B.D.C. E.C. AT T.D.C. B.H.P. R.P.M. 4/11/29 | ||