FSX P51 Army Air Corp X. This is Roger Dial's North American P-51 Mustang modified for Flight Simulator X. This aircraft is an accurate repaint of a United States Army Air Corp P-51 Mustang, tested over Inglewood, California, for the R. A. F. Included is a history doc. and pictures of the original aircraft. This is a complete aircraft, modified by Mark Rooks of RSDG.