Stock Photo - B29 Carries XS-1 Rocket Plane Aloft -- The Army's XS-1 rocket-propelled plane, built by Bell Aircraft and designed for supersonic speed of 1700 miles per hour, is carried aloft by a B-29 to an altitude of 25,000 feet where it was cast loose for its first flight under its own power. Chalmers (Slick) Goodlin, 23-year-old test pilot who flew the little 31-foot craft at about 550 miles an hour, said today he expected it will reach the 1700 mph, which its designers predict for it. December 10, 1946. (Photo by AP Wirephoto).

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