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 E.R.A. Ltd. concerning the examination of failed valves and the reasons for their failure.
| Identifier | ExFiles\Box 158\4\ scan0175 | |
| Date | 21th September 1937 | |
| September 21st.1937 Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}18/AP. 1860 Mr.P.Berthon, E.R.A.Ltd., BOURNE, LINCS. Dear Sir, We have examined the failed valves which you have sent for our inspection and are of the opinion that the trouble can be attributed to the following reasons - (1) That the section of the valve to which you apply the Stellite renders the valve weak at this point as illustrated in the sketch - <-- Stellite. Weak valve section. You will see from the drawing of our Bentley valve which we enclosed in our letter of the 20th. the type of section before Stelliting which has proved satisfactory and approximately as follows - <-- Stellite. The above description applies mainly to the valve in which a chunk of metal is missing. This we have had etched in order to show up the stelliting etc. continued | ||