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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).
Failure analysis of a sequence starter motor after a 25,000-mile test.

Identifier  ExFiles\Box 61b\3\  scan0232
Date  24th March 1931
  
RR 238 (150 BKS.) (DB{Donald Bastow - Suspensions} 461-8-12-24) MP 306975
X6079.
ROLLS-ROYCE LTD.
INSTRUCTIONS.
To: (E) ISP
Order No.: AD.92.
Customer's No.: X6079
Date: 24 March 1931

Sequence Starter Motor W from 19EX

This machine ran 25,000 miles without attention and then developed a tendency to fail to engage. On removal it was found to comply with the Production Test fairly well up to the teaser torque test on which it failed. On the proposed new engaging test, it failed on several occasions.

It was then dismantled and cleaned the only defects found were accumulation of oily deposit making all brushes sluggish and the commutator very sticky. The driving end bearing bush was tight in its housing the switch terminal was rather loose.

On re-assembly the leather wiper with which this machine was fitted was omitted.
(contd)

Signed
This Sheet must be filed on completion of the work.
  
  


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