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).
Querying calculations for Merlin inlet valve acceleration, valve bounce, and the necessity of chromium plating for rockers on Merlin and Kestrel engines.
| Identifier | ExFiles\Box 158\5\ scan0109 | |
| Date | 25th May 1941 | |
| To Lov.{Mr Lovesey} from Rm.{William Robotham - Chief Engineer} 1360 FILE Rm.{William Robotham - Chief Engineer}5/SW.25.5.41. Our calculations indicate that the minimum acceleration of the Merlin inlet valve at 1,000 RPM. is 104 ft/sec2 and the maximum acceleration of the same valve is 3,870 ft/sec2 at the same speed. We shall be glad to know if you agree with these figures, and also at what speed the Merlin valves bounce by visual observation. Have any tests been carried out to determine whether the chromium plating of the rockers is necessary if the valve spring load is reduced? Do we know why plating was not necessary on the Kestrel? Rm.{William Robotham - Chief Engineer} | ||