Two proposed modifications to the Japan S. engine concerning the combustion chamber and crankpin diameter.
| Identifier | ExFiles\Box 5a\1\ 01-page082 | |
| Date | 1st February 1931 | |
| R. {Sir Henry Royce} FROM E. {Mr Elliott - Chief Engineer} SECRET X5970 Kl/Mis.2.31. C. to SQ. NOR. C. to HS. {Lord Ernest Hives - Chair} BY. {R.W. Bailey - Chief Engineer} HV. JAPAN(Experimental Engine) S. ENGINE Please find herewith print of Lec. 2875. shewing two modifications. The first is in connection with the combustion chamber We propose to fill in the undercut we have at present to simplify the machining of the interior of the combustion chamber, and at the same time we want the space smaller. The origin of the undercut was to leave sufficient room round the valve seat without encroaching on the gasket dimensions too much. We think the valves will be satisfactory however as shewn on Lec. 2875. The other alteration is a reduction in the crankpin dia. to enable the con- rod big end to pass comfortably through the cyl. bore. K. {Mr Kilner} | ||
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).