FSX/P3D. And she is no doubt one hell of a Mad Dog! The 717 if still in production today would be stomping all over the likes of Embraer but sadly all we have are the ones still gracing our skies. Soon, you will be able to mount her and soar among the virtual clouds. I have spent quite a bit of time with the TFDi 717 and the only thing more interesting than the airplane is what TFDi actually stands for which i'm not tellin! One of the very best aircraft you will ever own is approaching so stand by folks!