Pictures and Plans for a 27' trebuchet and plans on how to build small trebuchets

Free downloadable simulators of the detailed mechanics of trebuchets (a form of medieval catapult), available for the Mac and PC. Also available are two detailed essays on trebuchet and onager physics.

Read specifications for the design and construction of a medieval torsion catapult. View images and plans.

Information on medieval trebuchets and modern reconstructions.

Focused on medieval castles, siege engines, knights and other aspects of medieval warfare.

Team Carbo's onager web site. Details on building onagers, and competing in Pumpkin throwing contests

Images and information on reconstructed projectile-throwing siege engines, including the trébuchet and traction lever engines.

Nomenclature, how they work, parts, theory, plans, and photos.

Several types of siege engines with lots of pictures.

This site is devoted to medivel seige, mainly trebuchets.

All about catapults, trebuchets, mangonels and onagers. Professionally engineered and authentic models and kits, videos, books, the hurler's message board, who's who registry, events, links, adventures and other fun stuff.