I was up on my fourth flight of the day with my FourStar 40. I did a low pass downwind and pulled up at the end of the runway and got about 300ft up to do an immelman. Just when I was at the top of the turn when the plane was inverted and in a full dive attitude I noticed I lost total link with the RX because I had no control of any surface and it went into failsafe (I noticed that the RX cut the throttle as I have programmed in my failsafe mode). This lasted about 2-3 seconds but I cannot really tell, I was very nervous. I gave it full aileron to level it and it finally recovered link and it leveled but it hit some trees with the wing and I finally managed to land it fairly well in a tall grass spot. The plane is already fixed and ready to fly again but I'm now very paranoid as to what caused this glitch and want to be certain before I fly again. I must say that I've already flown this plane with this exact same setup for about 2 months and this is the first time I get some glitch like this. The antennas are set up per manual instructions. The only thing that makes me wonder are the issues related to these receivers (the infamous Futaba heat issue). The RX is strapped on top of the battery pack so it might get a little hotter than usual but it was 15°C (59F) that day, nowhere near the failure point that has been made public by several users for this RX even if the battery got unusually hot during flight. I also tested the power switch by wiggling it and so but I couldn't find any abnormal behavior. Also worth saying, the battery showed little discharge when I load tested it after the crash. This glitch happened as I was just on top of some minor power lines that sit conveniently at the beginning of the runway which means that everyone who flies at my field goes over that spot at least 20 times each flight and no one has had any issues that have been related to those lines (although some have crashed into the lines themselves but that's another story). Just so anyone who might be able to help, here's the complete setup: O.S 46AX, Futaba 3004 on all surfaces, Futaba 10C transmitter, Futaba R6014FS receiver, 1200mAh NiCd battery pack.


Any ideas? I don't want to risk this plane again.