Ancient Engineering
The Atomic Bomb of the Middle Ages

The Stirling Warwolf Trebuchet

In the top 5 Most Wanted Science Kits on Amazon!

Designed and made in the USA for
better quality, better performance!

This highly detailed kit includes a working, historically accurate winch, trigger, trolley-block system, authentic half-lap and mortise and tenon joinery and more!

During a siege of Stirling Castle in 1304, Edward Longshanks (Edward the first, King of England) ordered his engineers to make a giant trebuchet for the English army, named "Warwolf".

With one blow, Warwolf leveled a section of wall, successfully concluding the siege of Stirling Castle. The Stirling Warwolf is generally thought of as the most powerful and most famous of the trebuchets in history.

With an authentic and historically accurate "squirrel-cage" winch mechanism, block-trolley system and working trigger, frame-ladder (for re-cocking), half-lap and mortise and tenon joinery, this is the most highly detailed and historically accurate trebuchet kit you can get. This kit has well over 140 pieces in it, plus two true scale-sized medieval warrior figures. At 1/20th scale, this machine stands 18 inches tall at the apex. The arm reaches to a height of 32 inches, and hurls its projectiles 40 to 60 feet! At 1/20 scale, that's about 800 to 1200 feet for a life-sized model. Even the projectiles (included) are scaled properly to represent 100 lb. and 350 lb. missiles.

Highly detailed and computer cut for accuracy, this model is a joy to build. The detailed instructions are complete with diagrams, photos, tuning tips and even historical notes about trebuchets.

Tools you will need include glue, a flat file and a 1/4" round or rat-tail file, clamps or rubber bands, household scissors and sandpaper to smooth any rough edges (there shouldn't be many.) The only other things you'll need to supply are a few hours of time, a little effort and some pennies for the counterweight bucket.

The kit is made from high-quality white hardwood. It can easily be stained any color, but simple exposure to sunlight will turn the natural wood a rich golden-brown over time.

We've put a lot of time and effort into making this kit as easy and complete as possible. We hope you'll enjoy building and shooting it as much as we have!

Tools required:
Scissors, Glue, Ruler, and a utility knife. Sandpaper is optional.

Assembly time:
For a Master carpenter doing a sloppy job: about 6 hours.
A person with no kit building experience being extremely meticulous: about ten days.
The model in these photos was built by Ron Toms over two days time.

Assembled Size:
- Height: 18" at the main axle, 32" to the tip of the arm.
- Length: 22"
- Width: 18"

Additional Counterweight Required: 720 pennies recommended,
(Or loose nuts and bolts, other coins, rocks, anything that
can fit into the 2" x 2" x 5" counterweight box.)

- 40 to 60 feet with the included wooden ball projectiles.
(Optimal range assumes a well tuned machine)

Shipping weight: 10 lbs.
Box dimensions: 36" x 12" x 4"

Quantity pricing info:
0 to 4 kits, standard price.
5 to 9 kits, 10% off
10 or more kits, 15% off

Orders of $200 or more qualify for FREE ground shipping!

For more discount pricing info, please visit

WARNING! This is a functional model intended for display and/or educational demonstrations of physics. It contains a fast moving arm and projectile that can cause injury if you make contact when firing. Use only under strict, competent adult supervision.

* You'll need to supply the counterweight material. 720 pennies are recommended, but anything from nuts and bolts, BBs, coins, sand or a good fist full of pebbles will do!

* Can throw 60 feet when properly constructed and tuned with sufficient counterweights. Your performance may vary.

* Stirling Warwolf Trebuchet is a trademark of RLT Industries.

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    Price: $199.00
    Minimum age: 12
    Availability: out of stock

    Item code: 10201

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Interesting Notes

Some Trebuchet History:

From the 13th century writing: "Itinerarium Peregrinorum et Gesta Regis Ricardi"

In June and July of 1191, Richard the Lionheart (the Duke of Normandy) laid siege to the city of Acre as part of the medieval Crusades.

The Duke concentrated on constructing siege machines and placing trebuchets [petrariae - literally, stone hurler] in suitable places. He arranged for these to shoot continually day and night. He had one excellent one which he called "Bad Neighbor" [Malvoisine]. Its continual bombardment partly destroyed the main city wall and shattered the Cursed Tower. On one side the Templars' trebuchet wreaked impressive devastation, while the Hospitallers trebuchet also never ceased hurling, to the terror of the Turks.

Besides these, there was a trebuchet that had been constructed at general expense, which they called "God's Stone-Thrower". A priest, a man of great probity, always stood next to it preaching and collecting money for its continual repair and for hiring people to gather the stones for its ammunition. This machine at last demolished the wall next to the Cursed Tower for around two perches' Length [11 yards or 10 meters].

The count of Flanders had had a choice trebuchet, which King Richard had after his death, as well as another trebuchet which was not so good. These two constantly bombarded the tower next to a gate which the Turks frequently used, until the tower was half-demolished. Besides these, King Richard had two new ones made with remarkable workmanship and material which would hit the intended target no matter how far off it was. . . . He also had two mangonels [traction trebuchets] prepared. One of these was so swift and violent that its shots reached the inner streets of the city meat market.

King Richard's trebuchets hurled constantly by day and night. It can be firmly stated that one of them killed twelve men with a single stone. That stone was sent for Saladin to see, with messengers who said that the diabolical king of England had brought from Messina, a city he had captured, sea flint and the smoothest stones to punish the Saracens. Nothing could withstand their blows; everything was crushed or reduced to dust.