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).
Diesel engines, fuel types, and Delco Remy starter motor performance.
| Identifier | ExFiles\Box 173\2\ img186 | |
| Date | 22th February 1934 guessed | |
| III I discussed Diesel engines with Capt Lyon, who is now acting Chief engineer. He cannot work up any enthusiasm for them nor for sleeve valves. They talk about lead not ethyl fluid here. 3c.c's lead is equivalent to 4c.c's fluid I understand approximately. Their 87 octane is a 4c.c's of fluid fuel apparently. DELCO REMY. (1) Starting. I gave them particulars of our starter motor output which they considered good, better than their own but this because they say you can do slightly better with 12 volts than 6. That being so I tried to find out how they managed to start their cars while we could not i.e. was all the difference in the oil. Without the thin oil they admit they are absolutely out of the picture. Their standard is for the motor to turn the engine at 30 R.P.M. at zero temperature with S.A.E 20 W. oil in it. The carburetter man is then called upon to produce a choke & manifold that will supply a starting mixture at zero at 30 R.P.M. | ||