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).
Returning to parallel teeth in place of 5 degree helical for the motor.

Identifier  ExFiles\Box 64\4\  scan0109
Date  16th November 1928
  
Contd. -2- EFC4/T16.11.28.
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and did not seem to be increased by making of main contact.
We are also returning to parallel teeth in place of 5°
helical, with the idea that perhaps it is not necessary to
get the motor out of gear quickly.

EFC.
  
  


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