Being new to r/c a/craft I'm reading up on as many problems as I can, I'm not new to flying or the weather conditions that effect small(ultra-lights, micro-lights) a/craft, very little is said about the weather conditions that will cause grief to these r/c a/craft, things like rotors, wind shear, inversion layers, boundry layers, up drafts, down drafts & many more conditions that will literally put them into the ground, these conditions will happen anywhere, anytime, all it needs is for a down draft to be stronger than propeller thrust & down it goes, all the full throttle it has available won't help, reading books on Micro Meteorolgy that hang-glider, ultra-light pilots have to know might help to understand a few problems that the Phantoms get.