The Northrop YF-23 “Black Widow II,” a prototype developed for the US Air Force’s Advanced Tactical Fighter competition in ...

Two teams competed: Northrop Grumman with the YF-23 and Lockheed Martin with the YF-22, which would become the F-22 Raptor.

In 1991, the U.S. Air Force staged a competition with far-reaching consequences. It was ta fly-off between the Lockheed YF-22 and Northrop/McDonnell Douglas YF-23 demonstration fighters.

Back in 1997, the US Air Force had to choose between the F-22 Raptor and the YF-23 for its fifth-generation fighter. The YF-23 had a greater flight range, giving the fighter the potential to ...

Northrop's YF-23 was first to fly ... Low-rate initial production of the fighter, designated the F-22 Raptor, was approved in 2001 and was followed in 2004 by successful completion of initial ...

The Raptor (which was originally intended to be ... the slightly stealthier and faster, but less agile YF-23 from Northrop (the maker of the B-2 Spirit stealth bomber) and McDonnell Douglas.

But sources close to the studies, which were kicked off by the USAF's recently issued request for information, say Northrop Grumman now includes a YF-23-based "regional" bomber concept among its ...

Credit: Illustration by Colin Throm/AW&ST based on drawings by Darold B. Cummings/ForzAero. When the U.S. Air Force announced Boeing as the winner of the Next-Generation Air Dominance fighter ...