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).
The development of various aero engine types, including private venture and compression ignition engines.
| Identifier | ExFiles\Box 19\5\ Scan076 | |
| Date | 14th May 1930 guessed | |
| -4- covered with snow. The railway track was not much longer than the car and only the side of the truck would let down so that we had to shunt backwards and forwards in order to get it on the train. Except for the bumpers the car would certainly have been damaged. AERO ENGINES. PRIVATE VENTURE ENGINES. R.{Sir Henry Royce} was of the opinion that twelve cylinder inverted two speed gear either on the blower or for the propeller, was getting a rather complicated unit for private flying. It was for this reason he was recommending the eight-in-line. Be-fore we left we did discuss the possibility that if one was out to make the simplest type of engine, one might consider simple straight in line six cylinder. That is, half an "F" engine without a reduction gear. The six cylinder engine is an engine we know all about, and one would assume that if this engine is to be developed at our own expense it would be better to keep off any novel type. The inverted twelve with the two speed gear is a proposition which should interest the Ministry and we ought to get them to pay for it and then apply the information to a similar unit after it has been proved. Although the eight-cylinder-in-line was discussed as the ultimate engine we think that the advantages put forward for it apply more for its use as a car engine than for aero engine. COMPRESSION IGNITION. R.{Sir Henry Royce} did not make any attempt to stick to the present | ||