Engine: Six General Electric YJ93's of 30,000 lbs. thrust each w/afferburner. Top Speed: 2,000 mph Range: Over 4,000 miles Ceiling: Above 70,000 ft. Span: 105 ft. 8 in. Length: 192 ft. 2 in. w/boom Height: 30 ft. 9 in XB-70 world's most exotic aircraft was designed in the 1950's as high altitude bomber flying three times the speed of sound Due to limited funds only two built as research aircraft to study aerodynamics, propuision, and other aspects of large supersonic aircraft Surviving XB-70 was retired to USAF Museum. W-PAFB, Ohio, in 1969.