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 concerning single-cylinder tests and development work on the Aspin engine.
| Identifier | ExFiles\Box 134\1\ scan0244 | |
| Date | 19th April 1940 | |
| 1129 Lr.{Mr Ellor} from Rm.{William Robotham - Chief Engineer} c. Lr{Mr Ellor}/Lov.{Mr Lovesey} c. Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} Rm.{William Robotham - Chief Engineer}14/ML.19.4.40. ASPIN ENGINE. We understand you are contemplating running some single cylinder tests on the Aspin engine. As you know, we contacted Aspin some time ago and have got to a position where we were proposing to put in hand a single cylinder unit. Obviously, it would not be efficient if we both ran single cylinder units with the Aspin type valve and we suggest that we have a combined talk round the job with the object of avoiding overlapping. At the moment our recommendation is that we run the Aspin valve on a 3 1/2" bore cylinder as a 2-stroke and that the Aviation Division do the 4-stroke work. The question arises as to how soon we can get a preliminary run, as, until we have done some continuous work with the valve running at 4,000 revs or over we cannot be very definite about it's reliability. Rm.{William Robotham - Chief Engineer} | ||