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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).
Instructions detailing a fault investigation on a dynamo, noting incorrect brush angles and concluding the dynamo was at fault.

Identifier  ExFiles\Box 70\3\  scan0315
Date  17th September 1927 guessed
  
RR 238 (150 BKS.) (DB{Donald Bastow - Suspensions} 461-8-12-24) MP 306975
ROLLS-ROYCE LTD.
INSTRUCTIONS.
To______________ 19__
Order No. P D, 3.
(2)
Customer's No.______________

some sort had occurred.
It was found, <strike>further</strike>, that the machine had a control brush angle of about 124°,
which means that the <insert>normal</insert> output was probably lower than that of the late standard machine; the C angle of which was 122°.
The insulation of the machine was OK
Judging from these facts it appears most undoubtedly that this dynamo was originally at fault.

Signed C.A.P.

This Sheet must be filed on completion of the work.
  
  


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