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Scotty -
Post this on the Aeroelectric list: aeroelectric-list@matronics.com. It sounds like the builder used one of Bob Nuckolls' power distribution schemes on the airplane.
Quoted below is a clip from a posting today that is similar to yours.
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I have a question on trouble shooting an aircraft electric system, I'm
looking for the experienced answer based on symptoms. The airplane is a
9 year old Lancair 360 currently owned by the original builder. The
system is 12 volt with a B&C alternator and voltage regulator (working
on model numbers) on a Lycoming IO-360. The system has been working
perfectly until last spring, at which time the system would trip the
field breaker every now and then. The problem has been more pronounced
during periods of cooler weather (Phoenix Arizona). The owner has had
the alternator tested locally with no problems found. Most of the time
the system works as designed. My latest advice to the owner was to
check the engine, alternator, main bus, and voltage regulator grounds
first. Wondering what you think?
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Cheers,
John
Ok - the problem... At Reno this year, I ran around the pylons at 3000 rpm for racing. During the flight on Saturday, a 5 amp CB popped. Since then, at higher rpm (2500 and up) it will pop in about 10 to 15 seconds. This, I take it, is the alternator field cb. The battery does not charge when this cb is popped.
Is this an alternator, voltage regulator, CB, or other issue? I didn't build the airplane, and there is no detailed wiring schematic.
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