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 discussing the potential causes for a valve sticking open, suggesting dirt or high revs as possibilities.
| Identifier | ExFiles\Box 46\2\ Scan245 | |
| Date | 15th May 1922 | |
| COPY X.4086. Hotel de'l'Ouest, Laval, May 15th. 1922. Hs.{Lord Ernest Hives - Chair} from Hy.{Tom Haldenby - Plant Engineer} Your Hs{Lord Ernest Hives - Chair}3/LG12.5.22. I have enquired of those on the car as to the cause of the valve sticking open and there appears to be no definite cause for the trouble. When they examined it when the stoppage occurred, all that was found was that the valve was fixed in its guide and open. They simply moved the valve and it sprang back on to its seat and was O.K. All I can think of that could have caused the trouble is that a bit of dirt may have become jammed in the guide. Everything was well lubricated and there appeared to be no wear on the valve stem. It is worth while examining a valve complete with springs and washers to see if there is any thing which could become jammed supposing the valve were flung further from its seat than normal due to the tappey lever striking the valve when the latter was bouncing on its seat at very high revs. Hy.{Tom Haldenby - Plant Engineer} | ||