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).
Phantom valve stretching, attributing the issue to high silicon content and proposing solutions.
| Identifier | ExFiles\Box 66a\2\ scan0078 | |
| Date | 7th May 1928 | |
| Hs.{Lord Ernest Hives - Chair} BY.{R.W. Bailey - Chief Engineer} RG.{Mr Rowledge} from R.{Sir Henry Royce} c. to BJ. HL. X8060 R5/M7.5.28. PHANTOM VALVE STRETCH. X.7060 X.8060 We can scarcely believe that the stretching is entirely due to the slightly higher percentage of silicon. We believe it is necessary - (1) to change to the heavier design of exhaust valve, (2) scrap all valve steel and valves with dangerously high silicon. Let there be no half-way: we must cure these troubles as far as we know how. For a long time we have been looking for a comparative test of the Austintite valve steel. R.{Sir Henry Royce} | ||