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 ...

Conceived as the crown jewel of America’s Cold War air strategy, the XB-70 Valkyrie was a technological masterpiece: a Mach 3 ...

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.

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 ...

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 ...