What is the principle of the old nine-door double ring?

Double rings are also called double guns.

Shuangxiang gun is two independent drug storage spaces in the same paper tube cavity, and both spaces are filled with the same mixture of black powder and charcoal powder. There is a paper partition between the two drug storage spaces, and they are connected by a powder fuse (powder twist). The difference is that the front section is tightly closed, and the back section is also closed.

But its tail is only stuffed with paper, which can't stand the impact of the gas ejected backwards when the gunpowder burns. According to the principle of recoil, the double-cannon flies forward, while the gunpowder fuse in the tube cavity continues to burn, eventually causing the gunpowder in front to burn. The generated high-pressure gas will make the pipe burst and explode, producing a second sound.

Extended data:

The cradle is the guide rail for gun recoil and reentry, and it is also the main body of the lifting part (including gun body, recoil device and cradle). The upper frame is the main body of the rotating part, which is installed on the lower frame with a base shaft and rotated horizontally by the steering gear. The bracket is installed on the shelf through its trunnion and rotates vertically through the elevator. The height machine and the direction machine make the gun body rotate in height and direction.

The elevator is installed between the cradle and the upper shelf, and the orienter is installed between the upper shelf and the lower shelf. The balancing machine keeps the lifting part of the gun balanced on the trunnion of the cradle, which makes the high-low machine easy to operate.

The aiming device consists of a aiming mirror and a aiming mirror, and is used for aiming the gun according to the shooting data of the gun. Off-frame, big frame and moving body, support artillery when shooting, and act as cannon car when marching. Cannon is also often used as a nickname. In fact, people called cannons are fat and savage in class, so they are called cannons.

Firepowder is used as energy to launch projectiles with a caliber of more than 20 mm ... There are many kinds of artillery equipped with various ammunition, which can shoot at ground, water and air targets, annihilate and suppress effective forces and technical weapons, destroy various fortifications and other engineering facilities, destroy various armored targets and complete other special shooting tasks.

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