Fling-A-Keg
dave weekly writes: "Ever play Age of Empires and wonder at the trebuchets and catapults and what it would be like to launch them? Well, a bunch of medieval history and mechanical engineering geeks at Siege Engine decided to piece together several launching apparatuses and, for the benefit of the History Channel, flung kegs, pumpkins, and watermelons hundreds of feet all day long. The page also has pictures of a bunch of other sweet launchers, including air cannons."
The best thing I got from that show was that the catapults on wheels worked the best. The reason was their counter wight was able to fall in a straighter line towards the center of the Eather, rather than the arc created on a fixed leg catapult. If you watch one on wheels fire, it will shimmy back and forth, but watch the weight in reference to another object (like a tree on the horizon) and you'll notice it very closely falls in a straight line... At the time I didn't think a free rolling catapult would work better, but now that I understand why it just seems so obvious. In any event, that PBS show was great!!!
Wheeeee