I had the identical thing happen to me a couple months back on my Hobbistar 60...it started doing loops and rolls at full throttle...had no control to get it back to the runway. Mine was doing loops so hard and fast that the wings sheared right off. Now I had a missle heading to the ground. Plane was in splinters but was able to salvage the engine. I took what was left to a guy who does forensics on planes and he came up with nothing. He thought it was either someone on the same channel or possibly "harmonizing" of other frequencies. It's rare but does happen. In my case, there was a club member who just bought a new radio on my channel. Personally, I don't think he turned of the tx when it put it in the impound...oh well...now I check his radio before I get mine from the impound rack.

Does your club keep track of who uses what frequencies? It's too late now, but if you know who else is on your channel, and if something does happen, you have a starting point as to whose transmitter to start looking for. Just a thought. Plus if someone is looking to buy a new radio, they can see what channels are being used the least.