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

The YF-23 competed in the Advanced Tactical Fighter (ATF) program during the Cold War but lost to Lockheed's YF-22, which became the F-22 Raptor. The YF-23 was admired for its stealth, speed ...

Here’s What You Need to Remember: Ultimately, the Air Force ended up with an excellent plane with the Raptor—but both the YF-22 and YF-23 were outstanding designs. Had Northrop won the ...

There's been some speculation that the wing design of the YF-23 also made it more stealthy than its competitor. Since the YF-23 design was so radical, many believe the choice of the more ...

The Pentagon funded the YF-22 over the cheaper YF-23 when they knew it was a far more problematic warplane—purely out of a desire to keep Lockheed Martin alive.