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...

The Bell X-2 (nicknamed "Starbuster") was an X-plane research aircraft built to investigate flight characteristics in the Mach 2–3 range. The X-2 was...

for the Bell X-1, the first supersonic aircraft, and for the development and production of many important civilian and military helicopters. Bell also developed...

was placed in 1945, and the first operational flight of an X-plane took place when the Bell X-1 made its first powered flight nearly three years later at...

The Bell X-5 was the first aircraft capable of changing the sweep of its wings in flight. It was inspired by the untested wartime P.1101 design of the...

The Bell AH-1 Cobra is a single-engined attack helicopter developed and manufactured by the American rotorcraft manufacturer Bell Helicopter. A member...

X-1 may refer to: Bell X-1, the first aircraft to exceed the speed of sound in controlled level flight Lada X-1, a 1981 Soviet concept MPV McLaren X-1...

The Bell X-1 was the first crewed airplane to exceed the speed of sound in level flight and was the first of the X-planes. Bell X-1 Chuck Yeager Yeager:An...

P-63 Kingcobra, the successor to the P-39, and the Bell X-1 were also Bell products. In 1941, Bell hired Arthur M. Young, a talented inventor, to provide...

The Bell X-22 is an American V/STOL X-plane with four tilting ducted fans. Takeoff was to selectively occur either with the propellers tilted vertically...