Built in the 1960s as a result of a USAF proposal for a supersonic bomber with high subsonic cruising speed and supersonic dash capabilities, the massive XB-70 was to have carried the same bombload as the B-52 Stratofortress at a higher supersonic speed than the Air Force's current strategic bomber, the B-58 Hustler. XB-70A-1 Valkyrie A technological tour de force of epic proportions, the legend of the XB-70 Valkyrie very nearly surpasses the performance of this extraordinary aircraft. Provides thousands of add-ons and expansions such as aircraft and scenery for FSX. The development of the Lockheed U-2 and the SR-71 Blackbird reconnaissance aircraft, as well as the XB-70. North American XB-70 Valkyrie XB-70 Valkyrie NASA XB-70.
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