The Mustang appears hanging from the ceiling in both the Museum of Technology and in the Capitol Preservation Society in Rivet City. There are no actions associated with the airplanes, and are simply there for decoration.
The P-51 Mustang appears only in Fallout 3.
Behind the scenesEdit
Based on the appearance of the cockpit canopy, the comparative size of the air scoop intakes, the lack of inner wing 'kinks' and the tall height of the vertical stabilizer, the P-51 Mustang shown in game is the P-51D model or later.