This means the game theoretically produces a more accurate flight experience, but also that you can include planes for which no aerodynamic data yet exists.
That is, it calculates the forces of lift and drag against the actual polygonal shape of the plane you're attempting to fly. Where other flight simulators model plane physics using available aerodynamic data for each featured plane, X-Plane simulates flight from first principles. The new game is due before the end of the year and now there's a demo out that you can download now and a trailer showing some of the features below.
The flight simulator series is the only real competitor to Microsoft Flight Simulator, with its own approach to physics modelling, and X-Plane 10 was my pick when I wanted to take a skyward jaunt. I didn't even realise X-Plane 11 was in-development, though of course it is.
