The North American XB-70 Valkyrie, a Cold War-era bomber, was a technological marvel designed to fly at Mach 3 and at 70,000 ...

It was the XB-70 Valkyrie, an experimental plane developed ... and the remaining one ended its career after 83 flights — many of which with NASA as a supersonic testbed — and just over 160 ...

NASA employed the XB-70 to investigate supersonic ... s efforts to develop a commercial supersonic airliner. The XB-70 Valkyrie’s final flight took place on Feb. 4, 1969, when it was flown ...

The first to suffer was NASA chief test pilot Joe Walker in his F-104N, as it rolled inverted across the back of the XB-70. The F-104’s T-tail ripped at the Valkyrie’s drooped right wingtip ...

21, 1964, the XB-70 Valkyrie, the most advanced American bomber ... In November 1966, the XB-70’s became part of a NASA research program to study the intensity and signature of sonic booms ...