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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).
Continued discussion on tappet mechanism design, including the use of a taper pin and immersing the camshaft in oil.

Identifier  ExFiles\Box 19\3\  Scan024
Date  9th February 1929 guessed
  
contd :- -2-

There are a number of ways of doing this but we have shewn a taper pin sticking out on one side, to clear which a groove is provided in one side of the tappet guide.

The hole for this pin has to be reamed before hardening the tappet.

While on this question of tappet mechanism it might be mentioned that we looked into the question of running the camshaft and tappets completely immersed in a trough of oil as you requested and find it means raising the camshaft about .750".

E.{Mr Elliott - Chief Engineer}
  
  


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