Wooden Trebuchet Kit by Oakland Ballistics
|Price:||$25.65 & FREE Shipping. Details|
Fulfillment by Amazon (FBA) is a service we offer sellers that lets them store their products in Amazon's fulfillment centers, and we directly pack, ship, and provide customer service for these products. Something we hope you'll especially enjoy: FBA items qualify for FREE Shipping and .
If you're a seller, Fulfillment by Amazon can help you increase your sales. We invite you to learn more about Fulfillment by Amazon .
- Enter your model number to make sure this fits.
- Explore physics while having fun launching!
- Launch over 30 ft. and win the science fair!
- Complete kit with everything you included in the box
- Updated Instructions printed right on the box
- More adjustable than any other kit available
Frequently bought together
Customers who viewed this item also viewed
This is a replica of a hinged counterweight trebuchet that was used during the middle ages. The details have been pared down to make this as simple as possible. Everything you need to assemble and launch is included with the kit: wood glue, bouncy ball, pre-cut and pre-drilled wood, vinyl pouch, trigger and fully illustrated instructions. With a full counterweight box of rocks, batteries, coins, or anything else you can launch the bouncy ball 30ft! Have fun launching dog treats, parachute army men, blueberries or anything else. It's a great learning experience with its hands on building and simple but in-depth physics. This kit has won science fairs, been used for summer camps and after school programs, featured in "Best of" shopping magazines, in-class demonstrations and more. It's fully adjustable release pin makes it the most customizable mini trebuchet for sale. Use it to learn about medieval siege weapons, physics or to destroy your building block castle.
Compare to similar items
This item Wooden Trebuchet Kit by Oakland Ballistics
|Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping|
|Sold By||Oakland Ballistics||Mota Group||etailz||Froggys Toy Stop||stirlingtechonline|
|Item Dimensions||5 x 15 x 19 in||2 x 8 x 2 in||8 x 12.5 x 24.4 in||2.6 x 13.1 x 8.9 in||5.5 x 7.8 x 4.3 in|
Top customer reviews
Incidentally the one I received did not come with instructions, but they are available on the manufacturer website. The wood also needed sanded and the holes re-bored to fit the dowels on the pivot arms, and bushings to make the dowels snug on the basket arms.
ADDENDUM - After some tinkering, improved results have been obtained. Some photos of this item show a small slit in the sling near the throwing arm, that allow the eye-ring trigger loop to pass through the sling, allowing the sling to lay flat. After adding this slit, and insuring that it is wide enough to not impede the release of the sling strap when firing, the sling releases correctly, and the projectile launches instead of falling on the table.
When using fishing sinkers for the counterweight basket, a 2.5 cm ball bearing(aka a Pinball) will leave a 5mm dent in a plaster wall. Excellent.
My son was really pleased with how far it launched his Despicable Me battle pod. It took a while to find the sweet spot - how many gravel rocks, how to lay the sling, and whatnot - but once he had it, they were destroying Lincoln Log cities like nobody's business. He lost the ball on the second launch before we figured out how to finesse the machine for best distance and straightest trajectory. Battle Pods work well as replacement projectiles, but we've found Lego mini figures don't get good release from the sling.
The down side is that I don't know how this has held together for anyone with the wood glue provided. We put the A frames together and let them dry overnight. As soon as we touched them the next morning, they fell apart. It's November in Virginia, so there's no humdity to interfere with drying, so I am really not sure what the problem was. The only thing I can figure it that the angles of the A frame arms aren't 100% on ours, so that may have contributed to the lack of glue setting. No matter how I slid those parts together, they just didn't line up 100%, so there wasn't 100% contact with all the surface areas that should have been in contact. I ended up nailing most of the parts together which bummed my son out because he felt like he'd put it together wrong the first time.
Overall, this was a pretty cool toy, especially for kids who like to build and dig the castle age. I went out on a limb to get this because I wasn't sure he would like it, but he is really happy with it, so it worked out.
I replace the softwoods with oaks and more exotic hard wood, pour lost wax bronze castings and hammer copper for hardware. Investigate the ancient drawings of the originals to understand the evolution and original details.
The physics of a trebuchet's mechanical motion during launch is fairly complicated. The variables are pouch, payload, sling length and loop, the leveraging angle of the sling to beam, the beam finger angle, the beam length and fulcrum, counterweight and an effective frame stability construct are each `least worst choice' trade-offs for range and accuracy. It's an excellent experiment in optimization that the ancients long debated. The folks that designed this kit did their homework. This kit is an excellent, approximately optimal start at the experiment. In this trebuchet, I replaced the counter weight with a lead casting to maximize the inertial mass.
This can be more than a toy if you enjoy this stuff. Or ... just a very good project assembling the kit with the kids and chucking projectiles across the living room.