I recently purchased one of the F9-F Panthers in the receiver ready configuration and I am unfortunately having an issue with it.
I took the plane out for my second flight on it. My first flight I flew it very gently barely going over half throttle and I had no issues other than the fact that there was no noticeable throttle increase after just over 3/4 stick.
Today I took it out and was being a little more daring with it and I also noticed that there was now a noticeable change in motor whine between 3/4 and full throttle. I only got about 3 minutes of flight time on it before the engine cut out completely. I had done about 10 seconds of full throttle flight and was just passing me when the engine just died. I still had control of the plane so the BEC was still working. I tried the old reset by dropping the throttle to nothing and bringing it back up but the motor did not respond. I did that a few times but I was unable to get the engine started again. I Had to ditch it in the grass as I didn't have enough speed to come around for a landing. Tore one of the landing gears out and bent the nose gear back a bit. Nothing I can't fix easily.
By the time I got to the plane the motor was working again although it wouldn't always start as I increased throttle. If I didn't get it past 1/4 stick quickly the motor would make a noise then not start up. If I quickly went to half throttle the motor would work.
Not sure if it's the ESC overheating or the motor that's my problem. What should I do about this?