Top, show me any publications that deal with advanced R/C flying. There aren't any. This is the thing you guys keep getting stuck on. A 15 knot winds influence on a full scale airplane is not the same as it would be on a model. Go fly your GA airplane in a 40 knot wind and then you may get something close. You are correct that physics don't change but because of size, wing loading, power ratio ect. the way our models react to these physics is different then what the reaction of a full scale airplane. I'm sorry you don't get that. The fact that our competition models fly truer ( Less control cross coupling ) makes a difference too. I'm betting that every R/C model you have ever flown ( and full scale too ) has had a roll couple with rudder application. This is where your arc is coming from, the roll couple. I'm betting you have never flown an airplane that exhibits pure yaw control with rudder input and no roll or pitch couple. Think about this for a few minuets before you reply. I will agree that for most airplanes out there you guys are correct, the only reason I jumped on this thread is that you guys seem to be wanting to brow beat this into an absolute and it just isn't so.