Northrop YF-23
PROTOTYPE FIGHTER AIRCRAFT FOR THE US AIR FORCE ADVANCED TACTICAL FIGHTER PROGRAM
YF-23; YF23; F-23 Black Widow II; YF-23 Black Widow II; YF-23A; Northrop/McDonnell Douglas YF-23 Black Widow II; Northrop F-23 Black Widow II; Northrup YF-23 Lightning II; McDonnell Douglas YF-23
The Northrop/McDonnell Douglas YF-23 is an American single-seat, twin-engine stealth fighter aircraft technology demonstrator designed for the United States Air Force (USAF). The design was a finalist in the USAF's Advanced Tactical Fighter (ATF) competition, battling the Lockheed YF-22 for a production contract.