Launcher Information.

The links below are only as reliable as anything else on the web. Be carefull.

This might be the most important site. Submitted by Mr. Wenkel.
http://www.youtube.com/watch?v=67fFDiPRsrk

A trebuchet site.
A pdf w/ physics stuff on trebuchets.
A site on building trebuchets.
NOVA's Lost Empire:
http://www.pbs.org/wgbh/nova/lostempires/trebuchet/
Trebuchet Physics:
http://www.tasigh.org/ingenium/physics.html
The Trebuchet:
http://web.grinnell.edu/techstudies/vick/index.html
The history of the trebuchet:
http://www.redstoneprojects.com/trebuchetstore/trebuchet_history.html
Floating arm trebuchet:
http://www.trebuchet.com/story.php/fat.html
NOVA's Lost Empire:
http://www.pbs.org/wgbh/nova/lostempires/trebuchet/
Trebuchet Physics:
http://www.tasigh.org/ingenium/physics.html
The Trebuchet:
http://web.grinnell.edu/techstudies/vick/index.html
The history of the trebuchet:
http://www.redstoneprojects.com/trebuchetstore/trebuchet_history.html
Floating arm trebuchet:
http://www.trebuchet.com/story.php/fat.html