yesterday we are having our first flight with our quaddcopter.
we follow all the necessary steps and after configuring and calibrating all, when the throtle is almost at the center one of the motor suddenly make a rusting sound and started to smoke. the quadcopter is not yet lifting , after an hour we try it again and the motor is just working fine then suddenly the other motor started to smoke to.
all wiring are connected fine, wondering whats the problem
motor : gartt 920 kv
esc : 20A gartt esc
battery: ypg 11.1V 5500maH
thanks in advance