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Summary: In the 1980s, the U.S. Air Force sought to replace the F-15 with a new fighter jet, spurring a competition between the YF-23 and YF-22. Northrop Grumman's YF-23, known for its stealth and ...
Northrop Grumman’s YF-23 Prototype was by all accounts an impressive machine with speeds of Mach 2.25 and a high 1.36 ...