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).
Engine testing, comparing the performance of the Marmon and Goshawk -11 engines and considering different valve timings and port arrangements.
| Identifier | ExFiles\Box 32\5\ Scan212 | |
| Date | 15th March 1923 guessed | |
| contd:- -2- We shall be able to get the engine running again without much difficulty and shall continue the tests. The B.M.E.P. of the Marmon is rather dis- appointing - the peak of the curve is approximately the same as Goshawk -11 - it falls away rapidly both at the higher and lower speeds. The object of trying the different valve timings was to see whether we could maintain the torque at the lower speeds. We may be better off as regards distribution with the arrangement of ports on the E.A.C. compared with the Marmon because of having single inlet ports at the end of the pipe - we may be able to correct for a single inlet at the end but it would be more difficult with a pair. Hs.{Lord Ernest Hives - Chair} | ||