1991 Northrop-Lockheed Flyoff for new fighter - Lockheed wins
Subsequent to studies, an RFP was issued in July 1986, and two contractor teams, Northrop/McDonnell-Douglas and Lockheed/Boeing/General Dynamics were selected in October 1986 for the initial 50 month demonstration/validation phase flyoff. The rollout of the prototypes was initially scheduled for mid 1989, but ongoing slippages delayed this.
The F-22 passed milestone II in 1991. At that time, the Air Force planned to acquire 648 F-22 operational aircraft at a cost of $86.6 billion. After the Bottom Up Review, completed by DOD in September 1993, the planned quantity of F-22s was reduced to 442 at an estimated cost of $71.6 billion. ">
NOTEBOB - the flyoff was completed 13 years ago. The designs were completed nearly 20 years ago.