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).
Photographic comparison of gear scoring after testing with low EP lubricant versus a deteriorated lead soap lubricant.

Identifier  ExFiles\Box 114\1\  scan0099
Date  11th January 1937 guessed
  
Fig. 15 SHOWING LIGHT SCORE AFTER TESTING WITH LOW EP{G. Eric Platford - Chief Quality Engineer} LUBRICANT
Fig. 16 SHOWING HEAVY SCORE AFTER TEST WITH LEAD SOAP LUBRICANT THAT HAD DETERIORATED AFTER STANDING
  
  


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