denverpilot
Tied Down
Yeah, the last thing I want to do is stop an engine with a balky battery. I learned the interesting way that jump starting my Navion with the APU plug won't result in the battery being charged. The contactor coil is powered from the battery side, so the battery is not ever put back in the circuit after such starts (though the contactor is accessible so a short piece of wire will fix that problem if you are aware of it).
Quite a few GA airplanes are like that. Cessna’s external power connector only powers the starter also.
In addition if one diode fails shorted (not the common failure mode) there’s a path to ground through the starter contractor and the starter will start to spin immediately upon plugging in ground power if the ground power isn’t switched off.
By modern standards a very dangerous circuit config. Also not helpful they put the connector forward of the wing strut close to the prop.
Pretty good way to see how well your flying Slap Chop works on a line guy.