This helicopter used to be fun, but then his behavior became unpredictable and erratic. When I picked up the helicopter, I could feel that the red and black wires were very hot.
A closer inspection found that the black wire was actually loose in the connector.
After de-mating the connector, a black spot of burned plastic can bee seen exactly where the black wire had been connected loosely inside of the connector. The metal coating on the connector has turned black. There's the problem!
Even when the connector is mated together, we can see the black spot through the translucent plastic. This is what to look for on your electric powered helicopter.
The solution is to get rid of the connector and then carefully weld the black wires together.
Cover the black wire connection with electrical tape, then weld the red wires together. Tape the red wire as well. The resulting connection is probably lighter in weight, than the connector was. Removing unnecessary weight is key to successful helicopter performance. The helicopter works better than ever. These red and black wires don't get hot anymore, hence the electric motors have a little more power.
Fin.
