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 comparison graph of the 'Japan' and 'China' engines, plotting Brake Horse Power and B.M.E.P. against R.P.M.
| Identifier | ExFiles\Box 5a\5\ 05-page227 | |
| Date | 6th November 1929 | |
| "JAPAN" ENGINE COMPARED WITH HIGHER OUTPUT "CHINA" ENGINE. CONDITIONS COMMON TO BOTH ENGINES:- COMPRESSION RATIO = 5.25. 46% LUBREX, 80cc P.R. CHOKE. 110° CAMSHAFT (STANDARD TIMING). OPEN ENGINES. CHINA ENGINE: 1.400" DIA. VALVES 1.200" DIA. INLET PORTS THIRD CYLINDER BLOCK FOUR PORT INLET PIPE. JAPAN ENGINE: STANDARD VALVES SIX PORT TURBULENT HEAD TOP FEED SLOTTED INLET PIPE. BRAKE HORSE POWER B.M.E.P (LBS PER SQ. IN.) R.P.M. OF ENGINE. | ||