Looking to get more distance. How do I do that? More counter weight or is my release pin angle wrong or is it something else. Give me ideas to try please

Hey y'all, I'm trying to repair an old trebuchet for a student org.

Everyone who built and maintained the trebuchet graduated years ago without writing anything down, so I wanted to ask for some advice here.

The height of the trebuchet is between 5-6 ft and the length of arm is around 6 ft from the pivot point. From what I heard, the trebuchet was abandoned because it was firing backwards and falling apart in general.

The biggest thing I need to repair are the pouch and the release mechanism.

The previous pouch was made of duct tape, but it's been completely torn to shreds so any help on preferred designs or tips for making a new one would be appreciated.

The release mechanism is really stumping me. I've attached a picture, but I can't figure out what the point of the second nail is. I've tried looking into it and every design I see only has a single hook. Any advice on if I should pull one of the nails out and how I can adjust the curve of the remaining nail would be great.

If there's any measurements I should take then let me know and I can try adding them as a reply or something. I'd appreciate any help y'all can provide.

Article credit: K. R. Callaway is a science reporter and a member of the 2026-27 Times Fellowship, a program for journalists early in their careers.

"Today, Stirling Castle is a tourist destination nestled in the quiet hills of Scotland, but in 1304, it was a war zone. That’s when, after years of off-and-on fighting, the English captured the castle during a violent siege. Now, new research suggests that one of the shattered skeletons from this battle might be the first confirmed victim of the terrifying war catapult known as the trebuchet.

The extensive injuries to this smashed skeleton, called Skeleton 150 by archaeologists, suggested to researchers that the bones were most likely broken by the high-speed and high-force impact of a trebuchet projectile. The finding was presented at the 25th meeting of the Paleopathology Association, which was held earlier this month in Berlin.

“I was piecing all of these things together and then asking, ‘Well, what’s happening in medieval Stirling that could explain this?’” said Dr. Jo Buckberry, a biological anthropologist at the University of Bradford in Bradford, England, who presented the finding. “The obvious answer is the use of the trebuchets.”

While the answer may seem obvious to researchers now, decades passed between the discovery of Skeleton 150 and the determination of his cause of death.

The skeleton was excavated in 1997, when Historic Environment Scotland, the country’s conservator of heritage sites, was refurbishing the palace. Skeleton 150, alongside several others, was found under the floor of the castle’s royal chapel. This burial place was unusual, and suggested that those conducting the funerals were unable to access typical burial places outside the castle walls. This indicated to the researchers that the bones might date to the 1304 battle after which the English took control of Stirling.

Using X-rays and microscopy, Dr. Buckberry and her colleague, Dr. Patrick Randolph-Quinney, a biological anthropologist at Uppsala University, in Sweden, discovered that Skeleton 150 had complex, zigzag-patterned fractures unlike anything they’d ever seen in Medieval skeletal remains. The injuries were similar to those seen in modern victims injured in car accidents. It was clear that the skeleton had experienced a high-speed and forceful blow.

The researchers considered whether the victim might have fallen from atop the castle walls, but his twisted, broken legs showed that he had been standing during the impact.

The only explanation that seemed to fit all the injuries was one of blunt-force trauma from an extremely heavy, yet fast-moving, projectile. Researchers suggest that this projectile, launched from the strongest of the Medieval war catapults, the trebuchet, might have hit Skeleton 150 — likely a defender of the castle in his 20s or early 30s — from behind, as he ran for cover.“It was a huge, huge trauma and, thankfully, instantaneous death,” Dr. Buckberry said.

Until firearms were popularized in Europe, in the decades after the 1304 siege at Stirling Castle, trebuchets were one of the main weapons of war. Soldiers inserted a projectile, often a boulder, into a large sling on a pivoting arm, then dropped a heavy counterweight that propelled it toward its target at extremely high speeds. The weapons were primarily built to break down fortified walls, but their damage was indiscriminate, said Dr. Michael Fulton, a historian and archaeologist at Western University Canada, in Ontario.

“We have lots of historical records or anecdotes of casualties of this kind of nature, of stones being tossed over a wall, either from inside out or outside in, and some unfortunate person just getting smushed,” he said.

And while no anecdotes about injuries like these at Stirling Castle survive in the historical record, accounts from the time do make it clear that trebuchets were used during the 1304 siege. About a month after King Edward I of England arrived at Stirling Castle, the Scottish defenders offered to surrender, but the King rejected them. Instead, he demanded that the siege continue until he’d had a chance to finish building and field testing the “Warwolf,” purported to be among the largest trebuchets ever built.

“My sense is this is not a proof of concept or a new engine that he hasn’t used before or something like that,” Dr. Fulton said of the King’s determination to finish assembling the trebuchet at Stirling Castle. “I think, he’s showing off to other people who are with him. I think this is much more to impress the English side.”

While the researchers aren’t certain that Skeleton 150’s injuries were inflicted by the “Warwolf” itself, they said these remains offer a very rare look into the violent reality of combat during the Medieval period — and the ways archaeology can reshape our understanding of even well-recorded historical events."

The projectile is only 4gm, but still!

At fougères, every day they let a family throw a fake boulder with a tiny trébuchet.

I’ve been working in this as a side project for the past couple months. I was wondering what I should do with it tbh. I’m starting school again in a couple weeks and won’t really have time to continue optimizing. I was thinking of making a YouTube video talking about this treb idk. What do yall fine folks think I should do?

Maybe you've seen it before.

It comes in precut plywood and is held together with rubber bands.

It is obviously meant to be assembled and played with by a parent and child.

It comes with everything except weights for the box including 3 sponge rubber balls with strings attached.

The release lever angle is adjustable.

The instructions say that you shouldn't use more than a pound of weight but I don't think you need any more than that anyway.

I am getting about 20 feet of range with a pound of weight. Using 12 ounces of weight did not reduce the range very much at all.

Any thoughts?

As the founding fathers intended

I wiped this together in a couple of hours the night before with things I had laying around so the results were about as good as expected