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What’s it like to have a five-foot long throwing arm? Just watch as John Park builds a portable trebuchet that can fling water balloons fifty yards. Unlike Medieval trebuchets that were constructed out of giant timbers and stout materials, this human-powered version is made out of cheap, easy-to-assemble ABS plumbing pipe. The perfect weapon for hurling rotten fruit at your enemies.

Check out the PDF for this project.

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  • http://twitter.com/ToolUsingMonkey Mike Werling

    Successfully built this.  Found a few minor issues with the instructions, nothing that couldn’t be easily remedied.  Used it during the birthday party to launch a lot of water balloons.  Thanks for the idea!

  • chad quist

    Great idea, affordable and fun for youth. Only measurement that wasn’t included ( which wasn’t hard to figure out) was the measurement on the base between the two tee’s. Excellent video and presentation. Thanks again.