Slingshot and improvised weapons guy, Joerg Sprave, put his Teutonic know-how to the test by crafting a building-sized launcher to hurl bowling balls at his opponents.
Propped at a 23-degree angle, with a 500-600 kg (1,100-1,320 lbs.) draw-force, the rubber band-powered launcher finds a spherical hunk of composite no problem.
“Achtung, fertig, los! Ho Ho Ho.”
Would you like to know more?
Construction and background of the 20-foot long launcher, cranked by a boat wench, is below– complete with tests against watermelon at close range. Ooof.
Source Article from http://www.guns.com/2016/10/10/bowling-ball-launching-the-bavarian-way-video/