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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 results of tests concerning the gumming tendency of rings with varying groove clearances and stiffness.

Identifier  Morton\M18\  img077
Date  3rd March 1927 guessed
  
contd :- -2-

hard carbon found in the previous test. Therefore we may say that from these tests :-

(1) The gumming tendency is less with rings
having large groove clearance than those
having small clearance.

(2) The gumming tendency is more marked with
weak than with stiff rings.

We are further pursuing these experiments with the object of determining the influence on the problem of oil passage past the rings and the stiffness.


Hm{Capt. W. Hallam - Head Repairs}/A.{Mr Adams} C. Lovesey.
  
  


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