We launched the trebuchet on Thanksgiving Day. The longest shot was about 40 yards with a hedge apple.

I tried launching a small pumpkin but it wend backwards because it was too heavy.

This is how the sling is attached to the arm. The single rope slides off to release the hedge apple.

This is a video of me launching a hedge apple of Friday. You can see more how it works with the vidio.

We have made some more progress on our floating arm trebuchet. We are almost ready for our first launch which is scheduled for Thanksgiving Day. Our camera's flash wasn't working so the shutter has to be open longer so it is kinda blurry.

We put some wheels on the arm and made the track narrower.

This is one of the buckets that hold the sand.

This is a guide for the hedge apple and the sling.

The ammunition.

I am working on building this floating arm trebuchet.
Here are some pictures of the frame and the arm.
A trebuchet is a device that was used in medieval times to destroy enemy castles.
This one is going to be used to launch hedge ball sized objects.

The weight falls strait down in that slot and wheels on the fulcrum slide on the track.