MACHINE Gun
The machine gun had three tiers that were on a rack. They are shown in the picture to the left. On each tier the machine had 11 barrels that a projectile, or missile, would be fired from. It had the ability to rapid fire because the first tier is being aimed and fired, while second tier is reloading, and at the same time the third tier is cooling down. After the first tier is fired then the second tier is aimed and fired and the third tier is reloading. The cycle is repeated. The machine gun is water or steam powered. Leonardo never produced it himself but the first tier was tested on the Discovery Channel and it worked. http://www.youtube.com/watch?v=FZeid2HoQJg