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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 noise experiments, returning the noisy dynamo No.604 for comparison testing on a car.

Identifier  ExFiles\Box 51\1\  Scan313
Date  30th November 1923
  
To FHC. from EFC. {E. Fowler Clarke - Electrical Engineer}
Copy Hs {Lord Ernest Hives - Chair} /TMW.
X4383
EFC {E. Fowler Clarke - Electrical Engineer} 4/T30.11.23.

X.4383 - DYNAMO NOISE EXPERIMENTS.

We now return to you dynamo No.604, to which you fitted the straight slotted armature. This dynamo is now the noisiest we have ever had on the bench, but we think it is worth while comparing the effect on a car.

Will you therefore kindly have it fitted to 3-GII in place of No.625, the noise of which other dynamo has been improved by changing the armature.

EFC. {E. Fowler Clarke - Electrical Engineer}
  
  


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