Wing47, with respect, your research thus far has just barely scratched the surface. Wing loading, for example, is very hard to accurately pin down. Respectable, original sources often differ by quite a bit, and that's just about wing loading. Center of balance is relevent to the discussion, but similarly hard to quantify, and only one from a rather long list of germaine measurements. You would need to have multiple, original, verified sources providing a LOT more numbers than what you have listed here. Finally, in order to truly critique the AH flight models, you would need to have all the data that HTC plugged into the formula, and the formula itself. HTC is not about to share either, since that would be giving away the farm (see also "hackers").