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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).
Issue with the Phantom III Gudgeon Pin marking cylinder walls and requesting a design change.

Identifier  ExFiles\Box 94\5\  scan0109
Date  20th December 1935
  
Rm{William Robotham - Chief Engineer}
BY.{R.W. Bailey - Chief Engineer}
c. Hx.
c. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}

E/JNR.{Charles L. Jenner}1/HP.20.12.35.

re Phantom 3 - Gudgeon Pin.

The buttons at each end of the gudgeon pin have marked the cylinder walls on one of the above engines.

This trouble has never been noticed before and this design follows the same practice on the Bentley. The Bentley, however, has a piston pin which is smaller in diameter.

Will you please alter the detail drawing so that the small end of the button is radiused off to the same diameter as the cylinder.

1.625 RAD

E/JNR.{Charles L. Jenner}
  
  


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