X-4 Bantom

Northrop X-4 Bantom airplane model. The X-4, a single-place, low swept-wing, semi-tailless aircraft was designed and built by Northrop Aircraft, Inc., for NACA. It had no horizontal tail surfaces, and its mission was to obtain in-flight data on the stability and control of semi-tailless aircraft at high subsonic speeds. The two X-4 aircraft were 23 ft long, 14 ft high, and had wingspans of 26 ft. They weighed almost 8,000 lb. at takeoff.