Home ENGINEERING USAF XB-70 Valkyrie Experimental High-Speed Delta-Wing Aircraft

USAF XB-70 Valkyrie Experimental High-Speed Delta-Wing Aircraft


The XB-70A, built by the North American Aviation (NAA) Los Angeles Division for the U.S. Air Force, was an experimental high-speed, delta-wing aircraft designed to fly at three times the speed of sound and higher than 70,000 feet.

source/image: Why No Limit

Designed in the late 1950s by North American Aviation (NAA), the six-engined Valkyrie was capable of cruising for thousands of miles at Mach 3+ while flying at 70,000 feet (21,000 m).At these speeds, it was expected that the B-70 would be practically immune to interceptor aircraft, the only effective weapon against bomber aircraft at the time.

The XB-70 used compression lift, which resulted from a shock wave generated by the leading edge of the engine intake splitter below the apex of the wing. At Mach 3 cruising speed, the shock wave is bent back about 65 degrees and the wing is superimposed on the shock system which has a pressure 40 pounds per square foot higher under the aircraft than in front of the shock.


The compression lift provided five percent of the total lift.The XB-70 was equipped with six General Electric YJ93-GE-3 turbojet engines, which used JP-6 jet fuel, specially formulated for the mission requirements. The engine was stated to be in the “30,000-pound class”, but actually produced 28,000 lbf (120 kN) with afterburner and 19,900 lbf (89 kN) without afterburner.

VIAWhy No Limit
Previous articleCustom 1959 Chevrolet Corvette Roadster
Next articleSiemens Full Electric Bike Motorcycle Occ Orange County Choppers