rv-9a-online(at)telus.net
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 Posted: Wed Feb 18, 2009 8:19 am Post subject: Sky-tec starters - elimination of Starter Contactor |
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Bob, Sky-tec's web site has information on wiring up their starters without
starter contactors. In addition, they seem to directly contradict the
recommendation of Van's aircraft on how to wire a starter contactor if one
is used.
See http://www.skytecair.com/Wiring_diag.htm for more information.
I plan on using an automotive relay instead of a 30A pushbutton switch to
activate the solenoid as they recommend, but the principle is the same. The
folklore that I'm used to is that you need an upside-down starter contactor
to be immune from large G-loads activating the starter. Seems if you
eliminate the contactor, this is not a problem. Of course, this all depends
on the design and reliability of the Sky-tec internal solenoid.
I've asked Sky-tec for clarification on the potential failure mechanisms of
their solenoids (G loading etc.), but have had no response.
Any opinions on elimination of the contactor? For bonus marks, how about
commenting on Van's recommendation of using the I contact in the starter
contactor to feed the starter motor solenoid (both pics on the link above)?
Thanks,
Vern Little
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