What is the principle of a cannon?

The principle of a cannon is:

The firing pin mounted in the breech strikes the primer of the projectile, igniting the firing charge. The combustion of the firing charge produces a large amount of gas (at a pressure of typically about 3×10^5 kPa), which propels the projectile forward along the bore with great acceleration.

The projectile leaves the muzzle of the gun to obtain maximum speed, and then along a certain ballistic trajectory to the target, the gas pushes the projectile forward at the same time to push the recoil of the gun.

The gun body consists of a body tube, a tail, a breech and a muzzle release. The body tube is used to give the projectile initial velocity and direction of flight, and to make the projectile rotate (smoothbore projectiles generally do not rotate). The tail is used to hold the breech, which is used to lock the breech, fire the projectile, and withdraw the fired cartridge.

Brief History:

As early as the Spring and Autumn Period, China had already used a projectile weapon, the ??????????????????????????????????????????????????????. In the late Warring States period, the Qin army first attacked the Korean city of Zhengcheng using stone artillery shot from a distance to the citadel, hitting the brick and stone roll, and then use the pine for the shell of the artillery, the flames in the sky. As late as the 10th century gunpowder for military use, 礮 will be used to throw gunpowder packets, gunpowder bombs.

In the 12th century 30 s, the Song dynasty appeared in the giant bamboo tube for the tube-shaped jet firearms -- musket; 13 century 50 s, and the emergence of bamboo tube-shaped shooting firearms -- sudden fire gun. The emergence of this body tube shooting firearms, the emergence of modern artillery is of great significance.