The first YF-23, with Pratt & Whitney engines, supercruised at Mach 1.43 on Sep. 18, 1990, while the second, with General Electric engines, reached Mach 1.6 on Nov. 29, 1990. By comparison ...

If pushed, could the YF-23 have kept up with the YF-22? It’s very possibly. But we’ll never get an answer. About the Author: Harrison Kass Harrison Kass is a prolific defense writer with over ...