Paul wrote:

I like to keep it simple with a double throw switch on the instrument panel. Up for
more pitch and down for less.

BTW if the system fails the pitch stays were it was.

Really?  Like if your contacts on the double-throw switch weld closed?  :-)
Be careful about such rash claims, Paul.

Russell

Well you have a point there. On the other hand in 50 years of messing with 
toggle switches I have never had the contacts weld close. Plenty have failed
to make contact however. Perhaps if both hot and ground wires were shorted
the switch might weld but then the motor would get no current so it 
would not rotate and the pitch would stay where it was. If that failure
mode was possible the motor current would have to be enough to weld
the switch contacts. If that was or is the case you have chosen the
size of your toggle switch poorly :-)

Paul Lamar
 
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