Meeting notes on revised specifications for the 'Japan S.' engine, focusing on the integral block/crankcase and cylinder head.
| Identifier | ExFiles\Box 5a\1\ 01-page099 | |
| Date | 13th April 1931 | |
| HY. {Tom Haldenby - Plant Engineer} FROM E. {Mr Elliott - Chief Engineer} SECRET. XY77 EL/M13.4.31. C. to SG. {Arthur F. Sidgreaves - MD} MOR. HS. {Lord Ernest Hives - Chair} C. to BY. {R.W. Bailey - Chief Engineer} RHC. {R. H. Coverley - Production Engineer} DA. {Bernard Day - Chassis Design} JAPAN(Experimental Engine) S. - REVISED SPECIFICATION. Regarding our meeting on the 9th. and 10th, the following are some notes that I made in connection with the engine. WET BLOCK AND CRANKCASE INTEGRAL. We are proposing that if this part in C.I. is unacceptable on account of the extra weight involved it would be made in aluminium with inserted wet liners of nitro hardened austenitic steel or austenitic C.I. A further liner material suggested possessing a high co-efficient of expansion is C.I. and monel-metal alloy. These liners would have a double rubber ring gland wit atmospheric groove between. The inserted wet liner saves complicated water coring. The aluminium block would be lighter than our present practice. The integral construction also saves on the height of the engine permitting use of present length of con. rods. The use of high expansion cyl. liners should be of considerable help in avoiding piston knocks and in allowing more extensive bedding faces on piston to be used. Nitro hardened cyl. cores or centrifugally cast C.I. liners would increase durability and facilitate replacement. It is agreed that the machined bore in the crank-case of the present design of J. {Mr Johnson W.M.} S. for camshaft and bearings is impractical and we have therefore suggested for the integral cyl. and crankcase that there shall be a large external door which shall disclose a chamber housing the whole of the camshaft and tappet bearings. This chamber will hold up enough oil to form a bath for lubricating the tappet gear. Boring is limited to the housings for the camshaft bearings and the boring bar can be supported in between. CYLINDER HEAD. It is agreed that in addition to the improvements already incorporated in the design to facilitate production | ||
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).