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).
Report on the performance of 2-stroke and 4-valve engines.
| Identifier | ExFiles\Box 133\3\ scan0233 | |
| Date | 14th July 1940 | |
| 1128 Jnr.{Charles L. Jenner} from Rm.{William Robotham - Chief Engineer} Rm.{William Robotham - Chief Engineer}18/ML.14.7.40. Herewith a report from Sammons on the work he has been doing on the 2-stroke engines. The small 4-valve engines does not seem to have had much of a performance above 2,000 r.p.m. Please return report after perusal. Rm.{William Robotham - Chief Engineer} | ||