Quote:
Originally Posted by XZIVR
I'm having issues understanding the physics of how a bad motor could just start firing all on its own. How is it getting power if the trigger is functioning correctly? Since it's always grounded to the battery, even if something happened to cause the gb housing to go live when the battery was plugged in, the result would be a dead short. I think I'm going to have to stand by my original comment..
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You can imagine it happening with a metal end bell like with the troublesome Systema motors that sometimes have this problem, because then there is a chance the circuit can be completed via some other route than the actual trigger, instead running the gearbox somehow. I've seen shorts where the current would have had to run through the gearbox shell itself in order to complete the circuit, with the gun firing even though the trigger contacts aren't even touching. It's pretty crazy.
Having said that, I agree with your original analysis. The trigger contacts could be sticky upon firing, and then getting rattled apart by the "bad" motor's vibration (or something of that nature).
Thus if this were one of my own guns, I wouldn't completely trust that the short is gone yet. A careful inspection should be done. Shorts are no joke ... an injury could result.