Despite its technical triumphs and support from aviators, the XB-70’s operational future unraveled almost as quickly as it ...
The XB-70 Valkyrie could cruise at Mach 3, riding its own shock wave to do so, and could hit altitudes of 70,000 feet. But the XB-70 Valkyrie never went into full-scale production ...
The North American XB-70 Valkyrie emerged from a United States Air Force requirement in the mid-1950s for a bomber capable of delivering nuclear payloads at speeds and altitudes beyond the reach ...