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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).
Responding to an enquiry about American pistons, their testing in an engine with a new Epicyclic Gear, and required modifications.

Identifier  ExFiles\Box 38\6\  Scan054
Date  27th January 1919
  
R.R. 235 B (200 T; (S.F. 103, 25-10-18) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2244.

X.3381.
X.3372.

EH7/LG.27.1.19.

To Wor{Arthur Wormald - General Works Manager} from EH.
-----------------

With reference to your enquiry on American pistons, the engine that has just completed 100 hours test for the new Epicyclic Gear, had American pistons fitted. Altogether these pistons have now run 173 hours. I have made enquiries and find that these pistons were reamered for the gudgeon pins at the works here. They also told me/that other American pistons which have come in, require to have the final reamering or broaching done here.

EH.
  
  


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