Proximate Costs of Project: Most of the project material was either cannibalized from past projects or found laying around in my garage or in the workshop. Adhesives: wood glue, hot glue, super glue, epoxy - 200lb+ Kevlar cord - cut accordingly - Elastic band to go around projectile to be used as a sling - 2 Pulleys for 3/8th" rod - CW (counter weight) and weight holding device - weight plates, eyebolts, plate of metal used for backing, washers, nut, and PVC or metal spacer tube - Various bits and pieces of metal to be used as a trigger catch and for reinforcing the trebuchet - Somewhere to fire it, preferably a football field or larger area. Nuts & Bolts:* - 4x -1/4th" fully threaded bolts or rods at least 3.5" in length - 1x - 1/4th" bolt at least 1" in length - 17x - nuts to accommodate said bolts & rods - 3x - washers, ditto - 6x - 3/8th" fully threaded bolts at least 5" in length - 1x - 3/8th" fully threaded rod at least 1' 8.5" in length - 10x - nuts to accommodate said bolts & rods - 50x - washers, ditto - 1x - 5/8th" fully threaded rod at least 1' 8.5" in length - 1x - 5/8th" wide metal tubing to reduce grinding of wood on the threaded rod - 2x - nuts to accommodate said rod - 6x - washers, ditto Miscellaneous: - A PVC pipe cut in half (your choice in diameter, as long as it fits whatever you are firing)** - 1/2in sheet of plywood, 1x2' - Tools & heavy machinery (table saws, band saws) to drill, cut, or make holes in wood. 2x4" planks - Lots of 'em (pressure treated preferably to prevent warping of the wood) Frame: (2x4's) - 4x - 4.5" - 2x - 1' 5.5" - 4x - 7" - 4x - 3' 3" - 2x - 6.75" - 2x - 4' - 6x - 9"Īrm: ( 1x0.5" planks cut from 2x4s, 1 each for those unmarked) So first and foremost, grab a pair of safety glasses, maybe some gloves and get to the workshop. There will be heavy machinery and power tools used, which will require safety precautions. This is no simple wood gluing project, nor part of your average scrapbook routine. Smaller trebuchet, smaller proportions for everything. Some of the materials can be subject to change depending on how you want to build your trebuchet. To do this, you will need everything listed below. Plan requests should go to you'll want to gather all the necessary tools and materials. Here are the conditions: 1) You agree not to distribute the plans to anyone else without his permission 2) You let Mr. You will have to personally ask/email him for the throwing arm blueprints. Ours is 4 feet and flings golfballs, basically halving the design. The one we based off ours of was the 8 foot MURLIN Trebuchet to fling baseballs. Vance did not wish for the plans to be publicly published because the plans were part of his intellectual property. Sources: (for the special instructions and help) (for basic information) Note: Most if not all of the dimensions for the throwing arm will be expunged due to privacy and copyright concerns, for Mr. So here is how we built our version of the MURLIN trebuchet. Following some research, we decided to build a MURLIN (Multi-Radius Linear Nodes) trebuchet, following research based off of Leonard Vance's designs, testing, and videos that he was so generous to share with us. A friend and I volunteered to build a trebuchet to compete against a local high school. And that brings us to our recreational and educational project - but unfortunately no explosives. However this time - they fling explosives. Today, they are typically used for recreation and education, although since the Syrian Civil War in 2013 and during certain riots in the Ukraine in 2014, trebuchets have resurfaced as weapons. After the use of gunpowder, the trebuchet and catapults as a whole began to retire as formidable weapons, only reappearing from time to time briefly. Trebuchets were still used well into the 15th century, long after firearms and cannons (gunpowder) were being used in force during the 13th-14th century. Trebuchets were used to launch said projectiles at castle walls to destroy them, with great effect. It is noted that they would typically fire projectiles, usually large stones/rocks upwards of 300 lb or more. The trebuchet began to surface around the 12th century in the Mediterranean in both Christian and Muslim lands. One type of catapult is the Trebuchet, one of the most powerful catapults to be employed during the Middle Ages. Catapults have been in use since ancient times and have been proven to be some of the most effective large scale weapons of its time.
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