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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).
Querying the necessity of adding grooves to intermediate bearings for the 25/30-HP engine.

Identifier  ExFiles\Box 115\1\  scan0017
Date  18th February 1936
  
To Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} from HPS.{Horace Percy Smith - Experimental Factory Mgr}

RE WHITEMETAL MAIN BEARINGS FOR 25/30-HP.

Will you please confirm the question of adding grooves to the Intermediate Bearings, which we have found very necessary on engines run during Endurance Tests when using Hall's Metal Connecting Rod Bearings.

HPS.{Horace Percy Smith - Experimental Factory Mgr}
  
  


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