The Lethal non-lethal ball machine

Make had an interesting post yesterday covering a ping-pong cannon built by some fellows up in Colorado.  Of course here’s the vid:

Their description is telling, as the water surely added the “pow” to the gun.

It runs off of a compressed air line and a standard wall outlet. After firing a few “dry” rounds, he proceeded to shoot off a few (ok a LOT) of ping pong balls filled with water. These things might not weight a lot, but they are moving FAST. A sheet of drywall was no match for them, and even particle board failed spectacularly when faced by a 1″ sphere of water.

For comparison, here’s the type of hole we produced when we fired a 12 gauge shotgun slug through the same particle board (OSB) walls.