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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).
Method to test various valve steels on an engine test bed.

Identifier  ExFiles\Box 17\6\  Scan045
Date  11th June 1928
  
Hs.{Lord Ernest Hives - Chair}
BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce}
Hl.
c. to BJ. Wor.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer}
47060
R1/M11.6.28.

VALVE STEELS. X.1474 X.5060 X.3822
X.9060 X.4587

I think the nearest and quickest way to find out the best valve steel is to test valves in an engine on the xx test bed.

I understand the steels suggested are Firth's (Nickel-Chrome-Tungsten) K.E. ditto, and present S.L.V.

If they all stand I suggest that the sections of the head be made lighter until they overheat or stretch.

Will Hs.{Lord Ernest Hives - Chair} get this done without delay, and so dispose of a matter that is costing money in time and thought etc.

R.{Sir Henry Royce}
  
  


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