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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).
Testing a 20HP dynamo, suggesting a slight advance of the control brush to reduce high output.

Identifier  ExFiles\Box 165\6\  img150
Date  30th May 1927
  
To Mr. Brock. from EFC.

X5660

20HP DYNAMO U8G. EX PRODUCTION.

We have duly examined and tested this machine. We find everything in order with the exception that the output is on the high side, though the brush angles are reasonably correct.

We suggest in this instance that a slight advance of the control brush should be given to reduce the peak output by nearly one ampere, in accordance with the last para. of our EFC11/T15.12.25.

We return the dynamo herewith.

EFC.
  
  


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