Chelonian
New member
I'm not sure about your motor wiring, because I can't see how it is, but let me throw something at you that happened to me with my first soldering job on my MiG-3.
When I soldered on the 3.5mm connectors from the motor to the ESC, I left gaps in the shrink tube. What I should have done was taken it all the way up to the top of the female port, and to the base of the male port. That way, there was no metal exposed when the connectors were plugged in.
When we first maidened the plane, I got about 2 feet off the runway and lost all power. The plane came down pretty quick; fortunately nothing broke. When we got over to it to see what happened, the plane was jerking and making beeping noises at the ESC. We took a look to see if something had gotten fried, and that's when we noticed that the connectors for the ESC and the motor were making contact. Disco'd the battery, brought it home, and re-covered the ends, leaving no further spots of metal exposed. No problems with that ESC and motor after that...Not sure if that's going on, but I'd definitely check your solder points and make sure there's nothing where there could be a possible connection for a short, either at the ESC/battery join, or the motor/ESC connectors. It may be completely fine, but I'd want to check just to eliminate it as a possibility...Also, wiggle the battery connector at the ESC. You may find one of the battery pins for the connector is "funky" and something's not working at certain connection points, exacerbated by wires shifting around.
I didn't solder them, so if it is that, the factory must have messed up. Even if it was shorting, how would that cause it to not turn off when I lowered the throttle?