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How To Build A Trebuchet


Let's cut all the wood for our Trebuchet first.

Using your long pieces of wood cut these lengths:

  • 1 - 16 inch piece; This is the swing arm
  • 2 12 inch pieces; These are the long base pieces
  • 2 10 inch pieces; These are the uprights
  • 3 5 inch pieces these are the cross pieces that complete the base


Now cut the triangle support pieces. This is easily done by cutting a piece of wood to a square about 5-6 inches on each side. Then draw a line from one corner to the other and cut across this line. It gives you two identical triangles. Shown in the picture at right is the square with the line drawn on it before cutting.
wood for the trebuchet base support
Build these two parts of the frame first. You should make these parts first because it will be much easier to assemble later on. Lay out one 12 inch piece of wood horizontally. Mark a line on it 3 inches from the left end. Place the ten inch piece of wood vertically at this mark.
Now carefully place the triangular piece on this structure and glue it in place. Put nails or screws in it to make it stronger.
Do this again for the other side of the trebuchet but.... You have to do the other side of the Trebuchet but it is a mirror image. Mark off 3 inches from the other side (the right end) of the 12 inch wood and this is where you put the upright ten inch piece and the triangle wood.
Lets continue on to the next part Trebuchet build page 2

Want to build a bigger, better, more powerful or fancier siege engine or siege machine? There are some great books available to you. These books, available at will help take your war machine building to new heights! Pun intended!


How to make a catapult book cover

The Art of the Catapult: Build Greek Ballistae, Roman Onagers, English Trebuchets, and More Ancient Artillery - Nice book that shows you how to build ten different catapult projects, moderate wood working and pvc piping kind of stuff. Good book with complete instructions and materials lists.



Backyard Ballistics

Backyard Ballistics: Build Potato Cannons, Paper Match Rockets, Cincinnati Fire Kites, Tennis Ball Mortars, and More Dynamite Devices Want to get a little more creative? This book is off the hook!




The Miniature Trebuchet by Timberkits

The trebuchet was the ultimate artillery weapon of the medieval period and early renaissance. A large and unwieldy weapon, it was typically built on-site during battle, and tuned to lob great weights - such as the carcasses of rotting horses and pots of burning pitch, over the castle walls and onto its inhabitants. Precision carved by computer controlled machinery for guaranteed fit and accurate joinery. The detailed instructions include loads of photos of each step of the construction process, tuning tips and safety notes. Included in the kit are four wooden projectiles, all the necessary components for the sling, trigger, and counterweight bucket as well as all the parts for the kit. The only thing you'll need to supply are 88 pennies for counterweight and a few simple tools - Scissors, a ruler, a utility knife, wood glue and a few rubber bands to hold the pieces together while the glue dries. Manufactured by RLT Industries