Do you enjoy building? Do you like huge projectile machine? If this sounds like you, we have a project to satisfy all your cravings. Trebuchets will make any day of the week so much better. In this Instructable we will teach you how to build one of these amazing machines.

Step 1: Proposal and History


We are in a high school engineering program and we propose to build the best trebuchet with a pivot point under four feet the world has already seen. We will work on this project for about a month. We will build, test, evaluate, refine and continue to make it better.


The trebuchet dates back to the middle ages where they were used as a siege weapon. On average these machines could fling material of 350 pounds onto an enemy territory. Unlike now, the humans pulled ropes instead of having a counter weight. Today they are used mostly for recreation and education.

<p>YouTube: &quot;build a really big trebuchet&quot;</p>
<p>how many 2x4s did you use in total</p>
<p>Thanks I built one and modified it and so far I have shot 155 feet with only 50 pounds.</p>
<p>hey man, what were your dimensions</p>
<p>Use a 4x4</p>
<p>for the arm</p>
<p>Awesome job, I want to make one someday. I have chatted with world champion Pumpkin Chunkiners and they all say the same thing like others here, add wheels. It looks more menacing and it does hurl the projectile much further.</p><p>This is the Yankee Siege in Greenfield New Hampshire. I have watched it toss 20 pound pumpkins over 600 feet.</p>
<p>Believe it or not wheels will give you more distance and less likely to break.</p><p><a href="http://www.stormthecastle.com/trebuchet/trebuchet-physics.htm" rel="nofollow">http://www.stormthecastle.com/trebuchet/trebuchet-...</a></p>
<p>I made something similar many years ago... ought to put the plans, which I still have, up!</p>
<p>Great, but!!!! You guys jammed out. Should have challenged the 'floating arm' way.</p>
<p>awesome....must make the neighbors very nervous...talk about your open carry though.....</p>
<p>Reasonalby experienced trebuchet maker here.</p><p>Pelican hook is a better way to deal with the release. When you up your weight, a quick release like yours can get jammed. Also, wheels can improve your efficiency, but do add a bit of terror when you fire it.</p>
<p>This is very impressive... To me, the bigger the better.... I would like to have one that heaved bowling balls a mile...</p>
<p>Got my votes... Only thing that disappointed me was that you used a $6500 solid modeling program for design... This puts it way out of range and utility for the home hobbiest... But very cool...</p>
<p>FANTASTIC !!! Very cool !</p>
<p>AWESOME! You did a good job, This is on my list of things to make. this should help me alot. </p>
<p>Very nice!!!</p>
Arm failure is always an option. My students broke two throwing arms testing their trebuchet this year.
<p>Nice job! Is that a ballista catapult in the background of the first picture (left side)?</p>
Looks like a really fun build.
<p>Awesome job and nice documentation. Also, thanks for the virtual trebuchet link. I've had kids taking data for 2 years on this <a href="https://www.instructables.com/id/Trebuchet-Project/" rel="nofollow">version</a>. It will be interesting to see how it compares. </p>
<p>That's a beautiful trebuchet! Thanks for sharing. </p>

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