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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).
Recommending a modification for aluminium pistons on the 40/50 chassis due to bearing issues around the gudgeon pin hole.

Identifier  ExFiles\Box 35\2\  scan 081
Date  21th June 1919
  
To BY.{R.W. Bailey - Chief Engineer} from EH.
c. to Bm.

EH1/LG21.6.19.

X.3400 - FOR ALUMINIUM PISTONS FOR 40/50 CHASSIS

The pistons which have been run on the first production chassis, shew that they have been bearing hard locally round the gudgeon pin hole. We think this is most probably due to a slight burr being made when driving in the gudgeon pins. We recommend that the pistons should be cleared away for 1/8" all round the gudgeon pin.hole.

EH.

R.H. 235 (200 P) (T) (S.F.) 103. 23-10-18 (G) 2244
  
  


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