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 to The Ethyl Export Corporation regarding the testing of chromium and silchrome exhaust valves.
| Identifier | ExFiles\Box 150\1\ scan0229 | |
| Date | 15th October 1936 | |
| x1282 Exptl. Dept. Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} 19/KW. 15th October, 1936. F.R. Banks, Esq., The Ethyl Export Corporation, Thames House, Millbank, London, S.W.1. Dear Banks, We are sending you under separate cover one of the 10% chromium exhaust valves which failed on test, together with a chart showing how these valves have stretched. Run under the same conditions, the silchrome valves, stellited, are perfectly O.K. Actually at the moment we are proposing to standardise silchrome valves stellited, and have just completed 15,000 miles running in France on them. We cannot at the moment see why we should go to any other steel. Yours sincerely, | ||