I jave a 3d foamy katana, and I've only gotten to fly it a couple times due to some "issues". When I first bought it, I had a pretty small setup on it, but it flew. On the first flight, I was not up 20 seconds when all of a sudden..everything stopped. It somehow landed ok, but I could not figure out what was wrong! I concluded it was the battery, which I replaced with a new one. That seemed to do the trick. Then, yesterday I was gonna try it again. I hand launched it, and it got right up there. I did dome rolls, hovered it, knife edge, fine. Then i was flying straight, and everything stopped, again! This landing was not nearly as pretty as the other one, and I am now fixing it.
The motor seems to be acting up a bit, when it starts to ge goin, it it drops really quick, then comes back. The motor is an e-flite 370 1080 kv, parkzone typhoon receiver, parkzone 20 amp esc, hs-55's all around, and a thunder power 1320 lipo.
Any ideas??? Please help!!!