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 ...

amassing 160 hours and 16 minutes of flight time, while the second prototype completed 46 flights, totaling 92 hours and 22 minutes. The XB-70 Valkyrie, with its daring design and groundbreaking ...

On this date in aviation history-April 26, 1942-we mark the 83rd anniversary of the first flight of the North American XB-28 Dragon. Conceived as a high-altitude medium bomber for the United ...

The company’s XB-1 demonstrator aircraft’s supersonic flight is the first time an independently developed jet has broken the sound barrier. The XB-1, which has now completed 12 successful test ...