Vacuum bazooka

The concept was originally proposed by Neil A Downie in 2001[1] but many variations have been built since.

[2][3] The vacuum bazooka uses a straight tube which is sealed with a type of bursting disk composed of 2 - 4 layers of aluminum foil at the muzzle and by the projectile at the breech.

When the projectile reaches the vacuum port its momentum causes it to continue past and break through the bursting disk towards the target.

[1] A lightweight bursting disk such as a piece of paper can be secured simply by the vacuum action when it is held against the barrel.

[citation needed] The velocity of a projectile in a vacuum cannon can be modeled.