A few years ago, I e-mailed another list to inquire if anyone knew why coils
were so often mounted upside-down. Someone with an electrical engineering
background replied that coils were oil-filled in order to provide cooling
and that the upside-down orientation was intended to ensure that there was
always oil around the contact end of the coil which, he said, was where most
of the internal heat was generated. Made sense to me (and I've only once
encountered a coil that leaked).
Lawrie
British Sportscar Center
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