The XB-70 Valkyrie was designed to rewrite the rules of flight—cruising at Mach 3 and soaring above 70,000 feet. But its path ...

Born from Cold War ambition and built to outrun enemy missiles at three times the speed of sound, the XB-70 Valkyrie was ...

The XB-70 shed a part of its leading edge when the aircraft returned to flight, and the first prototype was then limited to just Mach 2.5. The second aircraft was cleared to fly at Mach 3.

The XB-70 Valkyrie is born North American returned with a proposal for a bomber that was designed from the ground up to fly the majority of its missions at Mach 3 and at 70,000 feet (though some ...

A Total Failure: The XB-70 Valkyrie was an experimental U.S. nuclear bomber developed in the 1950s and 1960s as a potential replacement for the B-52. Designed to fly at Mach 3 speeds and altitudes ...