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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).
Failures on Spectre and proposing to increase the diameter of exhaust valve stems.

Identifier  ExFiles\Box 96\2\  scan0059
Date  17th September 1935
  
To E.{Mr Elliott - Chief Engineer}

x354

Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}15/KW.17.9.35.

In discussing the failures on SpectreCodename for Phantom III with Hs.{Lord Ernest Hives - Chair}, we are both of the opinion that the exhaust valve stems ought to be increased in diameter. We feel that now we have had the failure we should not run any risk!

Will you please look into the matter from the design point of view.

Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}
  
  


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