North American XB-70 Valkyrie

Defense Systems Full Specifications

North American XB-70 Valkyrie Aircraft Specifications

The North American XB-70 Valkyrie was an experimental American strategic bomber designed to fly at more than three times the speed of sound. Developed during the Cold War, it was intended to penetrate Soviet air defenses at high altitude and deliver nuclear weapons over intercontinental distances. Its enormous delta wing, distinctive folding wingtips, and six-engine configuration made it one of the most ambitious aircraft programs in U.S. aviation history.

The XB-70 program began under the U.S. Air Force’s WS-110A strategic bomber requirement. Advances in Soviet surface-to-air missiles and interceptor aircraft eventually weakened the case for a high-altitude, high-speed bomber. The aircraft never entered operational service, but its flight-test program generated valuable research on supersonic aerodynamics, propulsion, and structural heating.

Manufacturer

The Valkyrie was developed by North American Aviation, the American aerospace company later incorporated into Rockwell International. The program produced two XB-70A prototypes, which conducted research flights during the 1960s. The aircraft used a large delta wing and movable outer wingtips to improve aerodynamic efficiency at high speeds. Its design also exploited compression lift, using shock waves beneath the airframe to contribute to lift during sustained supersonic flight.

Speed and Range

The XB-70 was designed for a maximum speed of approximately Mach 3. Its flight-test program demonstrated speeds exceeding Mach 3, with a commonly cited peak near Mach 3.1. Published range figures vary depending on whether they refer to design objectives, ferry performance, or projected operational missions. It was intended for long-range strategic missions, but no operational combat radius was established because the aircraft never became a service bomber.

Six General Electric YJ93 turbojet engines powered the Valkyrie. The prototypes were designed around a nuclear-strike mission, with a planned internal weapons bay, but they never carried operational weapons in combat.

Cost/Price

The XB-70 was a research and development aircraft rather than a production bomber. Therefore, it had no standard operational unit price. Development and testing required substantial government funding, and the planned production program was canceled before an operational fleet could be built. Today, the remaining aircraft are preserved as historic aerospace exhibits.