Rolls-Royce Archives
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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).
The trial and potential adoption of Perfect Circle piston rings.

Identifier  ExFiles\Box 16\1\  Scan198
Date  7th November 1927
  
Na{Mr Nadin}, Springfield.
from HsF

V741

Hs{Lord Ernest Hives - Chair}3/LG7.11.27.

PERFECT CIRCLE PISTON RINGS. X.741

At the moment we have not standardised these rings for standard production. We are trying them out on some new pistons. It is our intention to adopt these rings on any new pistons we may produce.

Hs.{Lord Ernest Hives - Chair}
  
  


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