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 ...

When the Air Force commissioned the ATF, they wanted to bring the most radical aerodynamic designs forward and combine it with high-speed and total stealth. The YF-23 was stealthier and faster ...

What’s more, the YF-23 was believed to be both stealthier and faster than the YF-22 it was competing with in the ATF program. The one area where the YF-22 was deemed more suitable for the Air ...