My flying wing had an in air fire.

I had a first for me. My flying wing caught fire in the air. Not sure there were flames but it sure put out the smoke. The first thing I noticed was that the motor stopped. I started to fly it back to the runway. Than it started smoking. Next I lost all control. It did land safely next to the runway. I ran over and it was the 35 amp speed control that was smoldering and melting my wing.