Also, if you are into analogies, lets at least get it right: this is alot like studying cars, developing a general theory of transportation, and then noting that when airplanes land they do so on the same kind of wheels as cars ( namely, round ones ), that cars can be propelled by airplane engines, that both airplanes and cars are controlled by steering, throttle, and brakes, that both have headlights so the operator can see in the dark, that both are made of metal and plastics, that both carry passengers, that both of them tend to crumple up or explode when they crash, and that when cars go *really* fast they experience identical forces to what airplanes experience, and really fast cars use wings ( upside-down ).
So I could be stupid, but it seems to me that you can learn a heck of a lot about airplanes by studying cars.