Whipper design

Last year we constructed a whipper trebuchet and never really got off a good shot. I did a lot of research into it but I just couldn’t get the thing to stay in the pouch all the way around. I’ve been looking for design specs but it seems most trebuchet teams don’t document quite like we do.

I hoping to do some more research into the dimensions and such, modify last years design, and hopefully get off a decent shot.

Let me know if you have a good photo or some actual numbers at I can use. Thanks.