The XB-70 Valkyrie was a groundbreaking aircraft in the history of aviation, designed by North American Aviation in the 1960s as a high-speed, long-range strategic bomber. Capable of cruising at ...

Key Points: The XB-70 Valkyrie, a Mach 3-capable bomber developed during the Cold War, was designed to outpace Soviet air defenses. Powered by six turbojet engines, it could reach 2,076 mph at ...

The XB-70’s Design. In 1957, North American Aviation won the contract to develop XB-70, a delta-winged behemoth designed to cruise at Mach 3 (over 2,300 miles per hour) and altitudes exceeding ...