The aircraft packed a pair of Pratt & Whitney YF119-PW-100 engines that gave the YF-23 to supercruise at Mach 1.43 (or about 1,088 miles per hour), meaning that it could maintain that airspeed ...

renowned aircraft designer Darold Cummings offered to analyze the design for Aviation Week. Chief configuration designer for the YF-23, Northrop’s contender for the Air Force’s Advanced ...