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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).
Chassis 2301, detailing the special double piston rings with a new locking device.

Identifier  ExFiles\Box 16\1\  Scan125
Date  22th April 1913
  
AW/S/15/L22413
X741
April 22nd. 1913

Report on Chassis 2301

PISTONS. X.293

The pistons on this engine are fitted with the special double rings which have Mr Royce's new locking device, in the shape of a small pip left on the inside of the outer ring. The drawing Nos. are :-

Outer ring E.3189
Inner ring E.3190
  
  


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