self taught with a coroplast contraption called QHOR. It was a 4 channel with 4 servos and powered by a magnum 28 with a 9x6 prop. Rated as 3D by the guys who first made it flew just fine. It was slow but fairly unstable and could do aerobatics as I found out later. Man I crashed that thing. Every time for the first 50 or so flights. But repaired it on site almost every time. It was cheap and fun. It was like a brick without engine. If it died inflight than it was a crash. No lift from the wing. Just the prop. I still have it but I'll never fly it.