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).
Observations on machine noise related to bearing condition and dynamo performance.

Identifier  ExFiles\Box 36\4\  scan 147
Date  24th January 1919
  
RR.300 (120B) (SF 349 24-1-19) MP 200552
ROLLS-ROYCE LIMITED.
INSTRUCTIONS.
91420
To ___________
Order No. ___________
Customer's No. F.C.94.
Re ___________
IV
19__
The observations already described were made on a machine with good bearings.
A machine was afterwards put on which had loose bearings. This machine did not sing badly & we could not make it do so under any normal conditions. (It did of course sing with a fully advanced control brush but this will always happen with any of these dynamos).
Signed: PM
This Sheet must be filed on completion of the work.
  
  


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