The Northrop X-4 Bantam is a prototype small twinjet aircraft manufactured by Northrop Corporation in 1948.

Bell X-1-2. The X-planes are a series of experimental United States aircraft and rockets, used to test and evaluate new technologies and aerodynamic concepts. They have an X designator within the US system of aircraft designations, which denotes the experimental research mission.

Instability of the X-4 at high speed led to the conclusion that semi-tailless aircraft were not suitable for transonic flight (with the technology then available). The X-4 on display was transferred to the museum shortly after the program ended in 1953.

2024年1月22日 · Meet the X-4 Bantam: In the publishing world, Bantam Books is a wildly successful imprint. Of significance for Bantam in the 1980s was the autobiography of the legendary Brig. Gen. Chuck...

The X-4 Bantam, a single-place, low swept-wing, semi-tailless aircraft, was designed and built by Northrop Aircraft, Inc. 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 Bell X-1 (Bell Model 44) is a rocket engine–powered aircraft, designated originally as the XS-1, and was a joint National Advisory Committee for Aeronautics – U.S. Army Air Forces – U.S. Air Force supersonic research project built by Bell Aircraft.

2014年2月28日 · The X-4 was designed to test a semi-tailless wing configuration at transonic speeds. Many engineers believed in the 1940s that the such a design, without horizontal stabilizers, would avoid the interaction of shock waves between the wing and stabilizers.

The two X-4 aircraft were 23 feet long, 14 feet high, and had wingspans of 26 feet. They weighed al-most 8,000 pounds at takeoff. The X-4 was initially powered by two Westinghouse XJ30 turbojet engines and then by J30 turbojet engines with 1,600 pounds of thrust each.

2006年9月13日 · The X-4 was a small twinjet-engine airplane that had no horizontal tail surfaces, depending instead on combined elevator and aileron control surfaces (called elevons) for control in pitch and roll attitudes.

2002年2月6日 · The NACA High-Speed Flight Research Station X-4 research aircraft is seen in this 1950s in-flight photograph flying near an approaching cloud bank. The two large "X"s seen connected by a line painted on the aircraft were used as an aid in optical tracking.