OK, this is just a seriously looking subject to a probably trivial question. I am trying to learn to fly an RC model (Bixler 2, training/beginner level which I assume means "stable, easy to fly"). What is happening is that when I use ailerons to list the model and turn, it turns but then starts to climb. I have both ailerons and elevator under the right thumb, so there is a slight chance I do move the elevator involuntarily, but I don't think so - there is an easy to feel resistance on the stick which makes moving it in one axis quite easy. I am doing my best to trim the model and to keep the COG where it should be according to the manual, so I don't think it is something that trivial. Or perhaps such a behavior is perfectly normal and I should just counter it? There is also a chance the model is already unstable, as it got several serious hits (including one that broke 6 mm carbon tube wing spar).