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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).
Extract from a daily report from France regarding a spare starter motor failure and button switch issues.

Identifier  ExFiles\Box 64\4\  scan0232
Date  3rd April 1929
  
X7655

Extract from Daily report from France of
229X. 3.4.29.

The spare starter motor failed after three or four attempts at starting. It was again found that the larger diameter bearing (pinion end) had roughed up and worn. We came to the conclusion that one cause, apart from the unsuitability of the metals, was the pinion being to far too deep in mesh causing too heavy a load on the bearing. This is verified by the pinion not fully engaging when the starter button is pressed.

We also examined the button switch and found that the phosphor bronze contacts were not making good contact, also the button had to be pressed hard to obtain this contact. The switch is too stiff to be reliable.

GWH.{George W. Hancock - Head Chateauroux}
  
  


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