For anyone unfamiliar with a trebuchet, it is a medieval offence weapon that was designed to hurl objects at castle walls with great enough force to break them down. The original design back hundreds of years ago was very complex for the time. It takes quite a bit of fine tuning to get the weight ratio and sling release timing just right for maximum distance and force.
This one, of course, is on a much smaller scale. My trebuchet was actually built for my kids. This is what "santa claus" is bringing them this year. I love this for several reasons. I've wanted to build one for a long time and this is something I can use as an excuse to have fun with my kids. I think they will really get a kick out of it.
The trebuchet here stand almost three feet tall at the tallest point of the frame. The swing arm is close to four feet long. The counterweight on it consists of a bucket that holds four one liter coke bottles filled with wet sand. It is designed to launch tennis balls about two hundred feet. With some fine tuning though, I am possitive me and my boys can get more distance out of it though, especially since we will be more concerned with distance than knockdown force.