Two YF-23 prototypes were built. Each has its name – Gray Ghost and Black Widow II. These two mean this is the second Black Widow. The first was built by the company in 1943 – it was a P-61 Black Widow night fighter, which proved effective against German and Japanese fighters and bo.mbers.
The YF-22 won the contest against the Northrop YF-23, and entered production as the Lockheed Martin F-22 Raptor. The YF-22 has a similar aerodynamic layout and configuration as the F-22, but with differences in the position and design of the cockpit, tail fins and wings, and in internal structural layout.