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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).
Silent tappet scheme, rockers for the 20/25 and Bentley models, and a 10,000-mile test.

Identifier  ExFiles\Box 106\5\  scan0124
Date  19th April 1934
  
X 5060
20/25

To RHC.{R. H. Coverley - Production Engineer}

Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}7/KW.19.4.34.

The Rolls-Royce type of silent tappet has really given very good results.

As we are still in a mess with the Cadillac scheme because we departed from their original recommendations, we want to push through a set of rockers for the 20/25, to Hs.{Lord Ernest Hives - Chair}1364, and send them to France on 21-G-IV for a 10,000 mile test.

I should think it would be worth sinking a die for the rocker, as it could be used for both the 20/25 and Bentley. Will you please put a set through for the Bentley at the same time as the one for the 20/25.

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


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