B- 1 is a supersonic bomber developed by North American Aircraft Corporation, nicknamed "Lancer". 1974 12.23 and B- 1A made their first flight, but they were cancelled by President Carter because of the high cost.

198 1 year, after President Reagan took office, the US military resumed ordering. The new B- 1B bomber/KLOC-0 made its first flight in March, 1983, and/KLOC-0 was officially mass-produced in March, 1985. By the beginning of 20 19, there were still more than 60 B- 1B bombers serving in the US Air Force.

The biggest feature of B- 1 airframe is that it adopts variable swept wing layout and wing-body fusion technology.

Movable front wings are installed on both sides of the fuselage, with slight sweep angle and no aileron. The lateral control is completely realized by the spoiler on the machine and the differential with full moving flat tail.

There is no obvious intersection between the fuselage and the wing, which greatly reduces the resistance and increases the lift. When the plane takes off, the position of the minimum sweep angle outside the swept wing is changed to obtain the maximum lift.

When flying at high speed, we should shrink back to the state of large sweep angle to reduce the resistance and improve the flight speed. The B- 1 bomber has six external points, which can carry 270,007 grams of bombs, and three internal bomb bays, which can carry 34,000 kilograms of bombs.