Query regarding the functional temperature of Merlin valve springs in flight.
| Identifier | ExFiles\Box 143\3\ scan0175 | |
| Date | 12th April 1940 | |
| 1204 Lr. {Mr Ellor} from Rm. {William Robotham - Chief Engineer} Rm. {William Robotham - Chief Engineer} 18./ML.12.4.40. Have you any figures as to the temperature at which Merlin(Aero Engine) valve springs function in flight? Rm. {William Robotham - Chief Engineer} | ||
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).