Aerodynamics (or lack thereof)
Space crafts like the X-wing dosent exist, but a scientist called Dr. Les Johnson. He beleaves that if their is to be a galactic war like star wars, that the best strategy is to "Have the real physics working for me, and i could out maneuver all of them. I think that he is trying to say that if the real physics are even better than the false ones, that is should in Star Wars