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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).
Dynamo failure, suggesting faulty brush adjustment or bad external connections as the probable cause.

Identifier  ExFiles\Box 47\4\  Scan157
Date  17th January 1934
  
X.4383.

EFC.

BY4-P17.1.34.

20HP. G.A. 39.
RE DYNAMO FAILURE.

With reference to EP{G. Eric Platford - Chief Quality Engineer}/Hs{Lord Ernest Hives - Chair}19/015124, of which you have a copy, will you kindly send to my office for the dynamo in question, upon receipt of this memo. There is nothing that I can see which clearly indicates the cause of the trouble - I therefore consider that you should put the armature right and then check whether you consider the faulty brush adjustment was the probable cause, or will the evidence indicate bad connections externally to the dynamo, between the latter and the battery.

By
BY.{R.W. Bailey - Chief Engineer}
  
  


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