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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, proposing to scrap valve steel with high silicon and switch to a heavier exhaust valve design.

Identifier  ExFiles\Box 17\6\  Scan035
Date  7th May 1928
  
Hs.{Lord Ernest Hives - Chair}
BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce}
RG.{Mr Rowledge}
c. to BJ. HL.

X7060

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}
  
  


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