Hey there mate, I found your post about a Mini-trebuchet (
http://forums.bit-tech.net/showthread.php?t=136251) from google. I was wondering if you can tell me how you calculated the stresses on the swing arm, the pivot and the upright for your design. I'm thinking of making one for a project for my Statics and Dynamics course, but I want to have some idea of how much calculation I need to do as I only have a limited time to do it. Sorry If this is a bother, just wanted to know if you can help. Thanks for having the time to read this.
Pohl