V-22 Osprey
The V-22 tilt-rotor program has certainly been beset by controversy throughout its 20-year development period, but it seems to have come out the other side, after spending almost $60 billion, and is flown by the Marines and U.S. special forces. The two versions of the plane, dubbed the CV and the MV, cost around $70 million each, with most of that going toward the airframe itself, with a price tag north of $60 million.
