Getting Medieval #1: Trebuchet!

  • Advertise with us
Blog entry by ThreeJs posted 12-02-2007 10:16 PM 5627 reads 0 times favorited 4 comments Add to Favorites Watch
no previous part Part 1 of Getting Medieval series no next part

This is a repeat from the project I listed previously, but I thought I would take this time to start a series, since I plan on making other siege weapons.

This project is close to 4 years old. I made it with the scrap oak, I had left from the little table I posted a project about last week. It is a fun little trebuchet, put together with pegs, and the throwing arm on a threaded rod. The picture below shows it with a 2.5lbs weight, but at times I have had up to 7.5lbs on it. With 21” (15.25” above the fulcrum) it will throw a bouncy ball about 50’ on a slight uphill. (Never fired it on level ground.) The ball will usually continue to travel to the end of the street, or 3 more houses down.

We have used this at cub scouts, to wing 1” bean bags, with the scouts awards in them, at a castle. But only with the current weight. THe guy whose idea it was to try it, test fired it with the 7.5lbs, and sailed a beanbag all the way across the church santuary. :D

I think my oldest son and I will start a new one tomorrow. Maybe a catapult this time, or an onager. Anyway, I know a couple people asked for plans of the trebuchet that was posted last week, so I decided to make a sketch-up drawing of mine. If you would like a copy of the sketch-up file, I will be happy to pass it on. Just drop me a note.


I added the model to google sketchup warehouse and found many others out there too!

I restrung the swing arm, and put a new pouch on it. The boys removed the old one. The firing mechanism is a rope over arm (string over in this case), with a nail as the sear. (very high tech)

Here is the pin that hold / releases the string

Here is the pouch that hold bean bags, and bouncy balls.

Next project….. The desktop Onager!

If I get a good video of it shooting, I will be happy to post it. I have already drawn it in sketch-up. Now just to construct it.

-- David, Charlotte NC

4 comments so far

View Todd A. Clippinger's profile

Todd A. Clippinger

8901 posts in 4100 days

#1 posted 12-02-2007 10:32 PM

This looks like a fun project!

-- Todd A. Clippinger, Montana,

View ChicoWoodnut's profile


904 posts in 3816 days

#2 posted 03-23-2008 12:11 AM

Hey David,

I just stumbled accross this. Way cool treb! Check this one out. My son and I built it for his Jr. High “Medieval Days”. He is 23 now so that makes it about 8 years ago. Click on the thumbnails to see bigger pics.

-- Scott - Chico California

View GaryK's profile


10262 posts in 3989 days

#3 posted 03-23-2008 07:43 AM

I want a monster one!

-- Gary - Never pass up the opportunity to make a mistake look like you planned it that way - Tyler, TX

View rikkor's profile


11295 posts in 3875 days

#4 posted 03-23-2008 12:01 PM

Fun project.

Have your say...

You must be signed in to post the comments.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics