RE: Spektrum radio
Because of the frequency the "spectrum" system operates on, antenna orientation problems, and the FCC imposed power limitations on those frequencies, their range is extremely limited....very much like the household cordless telephones...some of which operate on the same frequency. It sure wouldn't take long for a conventional r/c plane to get out of range on this system. I think the manufacturers assumption is that park flyers do not get very far away from their pilots, and if they did, their low power and light weight dont carry as much damage potential.
jim