sarg314(at)comcast.net
Guest
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 Posted: Sun Jun 11, 2006 7:25 am Post subject: one Main switch or 2 spst switches? Alt. field circuit b |
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Robert L. Nuckolls, III wrote:
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<nuckollsr(at)cox.net>
At 01:39 PM 6/10/2006 -0700, you wrote:
>
>
> Bob:
> I happen to have a number of high quality, sealed, mil spec.
> Cutler-Hammer SPST switches that I'm itching to use. Is there any
> reason not to use one for the battery and one for the alt. field coil
> instead of the 2-10?
The rationale
for two poles in the DC power master switch of alternator-fitted
aircraft
was to PREVENT alternator-only operations where the system's operating
characteristics under these conditions were not fully explored.
Special cases aside, the vast majority of aircraft have been produced
with variations on the infamous split-rocker switch. A device
designed to provide control of the battery-alternator combination
while specifically preventing alternator-only operations. Hence
the use of a 2-3 or 2-10 switch in my drawings.
Bob . . .
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Hmmm... Sounds safer to travel the well-worn path rather than use the
alternator in a configuration "not fully explored". I'll get a 2-10.
--
Tom. S.
RV-6A - electrical system.
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