Floating Arm Trebuchet Plans Download
Don't forget to download the free plans for use in Google SketchUp. All comments are welcome!
You might also want to check out our pool table restoration site at HowToPool.com
Some news for you!
The parts list has now been added in Page 5. General construction steps coming soon. Please contact us with questions or corrections!
The site may also be moving to a different domain.
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Views of the Trebuchet
Here are some basic images showing the trebuchet from different angles and other images with some close-ups on the more important components.
This is the side view with measurements.
This is the edge view from the lower wheel side.
Top of Trebuchet
Release Nail, Catch and Sling Rope
This is just a nail that was pounded in and had the head cut off with a hacksaw along with another piece of metal to wrap the projectile rope around. You will want to bend the release nail a little towards the direction of the target and adjust it slightly while you experiment with different counterweights and projectiles. Originally we had it straight up and down and that was making line drives or throwing the projectile into the ground.
The rope that attaches to the sling is about 44" on one side and about 46" on the other but that doesn't include the knots. You can read down below under the 'Projectile Trough' heading that we adjusted the ropes on both sides to make them even so when the treb was armed the sling and projectile was all the way towards the edge of the trough near the middle. As we fired the ropes tightened and we readjusted the knots. It was mostly trial/error.
This was made out of doubled over denim and we sewed around the holes we cut through. When adjusting the rope make sure it is even from the release nail and the other fixed side. The finished sling is 3" x 11" with a little over 1 3/4" fold over on each side before it was sewn. I think the original size of denim before folding and sewing was 12" x 15". The 12" side was folded in the shape of an 'M' and then the sides were folded in and sewn on the edges and a sewn circular pattern where we put the rope through.
For ours we cut a groove in the lower wheel and did a complimentary cut on the throwing arm.
This is a eyebolt that was ground down smooth. A better way would be to have a drop gate on a hinge that is easier to pull.
View of Drop Area
This is a view of the drop area between the vertical supports.
Lower Wheel View
This is the detailed view of the lower wheel. We cut some wood spacers to keep it relatively centered but you can use additional washers.
We tied a rope around a washer so the throw release was smoother.
This was just some thin plywood. We adjusted the ropes so the pouch and projectile came right to the edge of left side of it near where the weights drop.
This was just some old black pipe that was polished up and inserted through the arm. It was kept in place by an eyebolt, washers, and nuts.
Vertical Support Bottom
The vertical supports had a wood spacer on top and bottom and on the bottom it was reinforced with additional material.
Side View of Far End
Side View of Wheel End
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