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 stretch, proposing a heavier valve design and scrapping steel with high silicon.
| Identifier | WestWitteringFiles\S\2April1928-June1928\ Scan072 | |
| Date | 7th May 1928 | |
| HS.{Lord Ernest Hives - Chair} ) FROM R.{Sir Henry Royce} BI. ) RG.{Mr Rowledge} ) G to BI. HL. PHANTOM VALVE STRETCH. X7060 X8060 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, and valves (2) scrap all valve steel/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} | ||