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).
Status of 6-cylinder and 8-cylinder engine patterns for post-war production.
| Identifier | ExFiles\Box 146\4\ scan0022 | |
| Date | 25th September 1939 | |
| 1260 To RHC{R. H. Coverley - Production Engineer}/Vs.{J. Vickers} from Rm.{William Robotham - Chief Engineer} c. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} c. Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} PATTERNS. We are anxious to be sure that we have got the pattern situation straight on our new range of engines so that if we want to get into production quickly after the War, we shall at least be able to make a few hundred engines with the equipment available. We shall be glad if you would check the following:- 6-CYLINDER PATTERNS. We have at present one 6-cylinder pattern which is up to date. This 6-cylinder pattern is capable of being converted to an 8-cylinder pattern and was, in fact, used to make some 8-cylinder castings. In its present form it is suitable for starting production on the 6-cylinder engine. 8-CYLINDER PATTERNS. A complete 8-cylinder pattern exists for making the up to date High Power engine in Cast Iron. The following pieces are available to enable this basic pattern to make other engines. These are:- (1) A cylinder block which fits on the crankcase to make a Conventional engine. (2) A cylinder block which fits on the crankcase to make an aluminium engine with 3 1/4 bore dry liners. It would be noted that in the case of the aluminium engine, thecrankcase will have been designed for cast iron while the block is designed for aluminium. This was accepted to avoid making a new crankcase pattern for the aluminium engine. We attach a list of pattern numbers which we received when we stored the patterns, and should be glad if you could say which patterns will make which engine. | ||