trebuchets

so who knows what a
trebucket is?
well i had this wonderfull idea for building one this summer, they look fairly easy to build according to the web site WWW.trebuchet.com
Then problem is what if I run into problems who do i call for assistence. King Richard 1 build one that was 25 feet hight and could throu things a couple of miles. to destroy the city walls for what ever city you like. Called the attom bomb of the middle ages. but King Richard is not going to help me, they do look so interesting, there is a desk top one , for anoying the guys at work, for a day maybe. or they is the one that is 18 inches high to play with the neighbours , ( do i know them that well.) or to pick on other friends. when am i going to have the time , but dam they look kind a cool.
If I built one would it acutally throw??
The other thought was to buy a model of a ship HMS Victory or one , maybe the Endevour. but they were more expensive .
Any way just some thoughts for the day. it s kinda fun where I waitress there ae a couple of peoole whose actually have a few clues about english history, what a blast...