Rolls-Royce Archives
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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).
Note on determining the permissible duration of inlet valve opening for car work by referencing aero cams.

Identifier  ExFiles\Box 13\2\  02-page087
Date  5th June 1931 guessed
  
(2)

We do not know what duration of inlet valve opening is permissible for car work, but hope to find out from these aero cams.

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


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