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Requesting modifications to an ignition coil for use with increased plug gaps.


Identifier  ExFiles\Box 164\5\  img251
Date  12th August 1936
  
By {R.W. Bailey - Chief Engineer} /RD. From Hs {Lord Ernest Hives - Chair} /Wst.

86017

Hs {Lord Ernest Hives - Chair} /Wst.12/MA.12.8.36.

IGNITION COIL FOR USE WITH INCREASED PLUG GAPS.

We are anxious to persevere with the outside primary coil on chassis particularly in connection with increased plug gaps.

We would like a further winding instructing consisting of 20,000 turns of 44 S.W.G. on the secondary and 285 turns of 20 S.W.G. E.S.P. wire on the primary. Also it might be advantageous to use the stalloy iron wire core instead of the plates.

Could you please arrange for these modifications to be instructed?

Hs {Lord Ernest Hives - Chair} /Wst.
  
  
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).


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