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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).
A scheme to adjust dynamo output by rotating the brushes.

Identifier  ExFiles\Box 36\4\  scan 095
Date  26th July 1920
  
R.R. 199 (250T) (SD676 10-7-17) MP18/866
E7C from Dy{F R Danby}
X. 30146
26/7/20

Mr Ireland had arranged before coming over a scheme which took away the Electrical main. He rotated the brushes a certain amount.

Brach had previously tried this but as when he tried it the B output fell to 12 amps he did not go further.

The dynamo as above cuts in earlier & gives 12 Amp max & fall within new dynamo schedule.

We are sorry on these lines.
By
  
  


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