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).
Letter to The Rover Company Ltd. discussing an engine's power curve and performance ambitions.
| Identifier | ExFiles\Box 127\2\ scan0090 | |
| Date | 21th April 1939 | |
| 1091 Rm{William Robotham - Chief Engineer}4/R.{Sir Henry Royce} 21st April, 1939. M.{Mr Moon / Mr Moore} Wilks, Esq., The Rover Company Ltd., New Meteor Works, COVENTRY. Dear Wilks, Herewith a copy of the power curve which I showed you the other day. Our ambition for a long time has been to get an engine which would give a B.M.E.P. of 500 to 4,000 R.P.M., and, at the same time, be capable of running on 80 octane fuel without excessive detonation. This curve is probably 5% better than we shall get in production as it was taken off a particularly good engine. On the other hand, we shall be disappointed if we do not manage to run at 7:1 compression ratio which will, of course, lift up the top and middle of the curve by 5%. We very much enjoyed our visit the other day, and I am sending Martindale to look over your brake set up on Wednesday of next week. Yours sincerely, | ||