I'll check the CG again. My instructor had me balance it so that it requires about 1/4 to 1/3 down elevator to fly inverted. At idle speed it doesn't really do anything funny other than not fly. It takes a lot of elevator to keep it in the air, and still descends rapidly. From what I recall, flying downwind leg (with no wind) at two clicks above idle (just to see what was happening) needed a bunch of elevator, and the plane was a bit nose up. Roll rate was very slow and mushy, and I had to be careful to keep the plane level. But this is exactly what I had expected.

Sorry if I'm not clear enough about stuff, I'm still learning this plane (20 flights?) What was happening was that I was coming in 3 or 4 clicks above idle. I didn't think there was any problem until the club president told me I need to learn how to land it slower. Anyway I'd come in at 3 or 4 clicks above idle, and hit idle when I wanted to set it down, and it would set right down, but definitely needed some room on the ground to slow down. Now that I think about it I guess I did have a hard time in that I had to take a few approaches so as not to overshoot the runway. So I was told to learn the descent rate, which is why I've been flying as slow as I can, to try to learn the planes behavior at low throttle. Felt like I was getting it until this whole stall/hit episode happened. I had a bunch of landings, with a decent descent rate, plopping the plane on the ground in the first 1/4 runway, and it stopping within 20 feet or so. But just when I got to the point of doing that comfortably my plane went wild on me.

This is what made me think I was hit. I flew a bunch of touch-and-go flights, with enough speed for take-off, then right back down to a couple of clicks above idle, and flew the pattern just fast enough to stay airborne. I felt very comfortable controlling the plane, as it was predictable - it did exactly what I expected it to do at such low power settings. I don't recall feeling any wind gust, especially something to cause a change in the plane's attitude, but maybe it doesn't take much, or maybe it was up high enough for me not to feel it. Regardless, the plane became unpredictable and completely out of control.

My idle is just fast enough to keep the engine from stalling, which I assume is correct. There is quite a noticeable jump in RPM between each click. I'm flying with an 11x5 mas prop.

On the receiver issue, I understand I should have it checked. Is there a need to check the servos, too, or is that something I or someone at the club can do?