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Torsion and Tension Catapult Plans CD

This CD includes plans for a variety of torsion and tension catapults and more! Including:

The Greek BallistaThis model is 41 inches long, 24 inches wide and stands 31 inches tall. The ballista uses a pair of skeins (bundles of twisted rope) for power. Similar to the working of a crossbow, the Ballista actually preceded the crossbow in western culture by over a thousand years.

The Mighty Roman OnagerAlso known as a Mangonel, this model is 16" long, 12" high and 8" wide. This historically accurate, compact and portable catapult uses the exact same principles as the ancient Roman war machines.
Petraria ArcatinusPowered by a steel bow, this is the catapult you've seen in ancient drawings and Hollywood movies, but with a difference... This one really works! This model is 18 inches long and 10 inches wide. The arm reaches 18 inches high at rest.
Scorpion IIThe completed model is 18 inches long and 9 inches wide. The arm is 28 inches long. The Scorpion II main fulcrum is attached to an aluminum linkage for smoother action and a more dynamic arm tip movement.

And the new Rat-trap Spoon-a-pult!
Designed to be easy to build using simple household items and common tools like pliers and a hammer, and using a Rat Trap for power (available at most hardware stores). Great for school science experiments!

This disk also includes these additional manuscripts:
  • Historical conjecture on the Petraria concept
  • Useful information on scaling
  • Safety notes on working with wood
  • and more!

Tools you will need:
For all projects (except for the rat-trap model) you will need a table saw, drill press, screwdrivers, carpenter's square, scissors, needle-nose pliers (for the petraria) and if you have a router, that would be useful too. But these can be made without a router.

Our two highly popular e-books are also included:
The Projectile Throwing Engines of the Ancients, By Sir Ralph Payne-Gallwey
Catapult Design, Construction and Competition. By Dr. Bernard F. Barcio

Our Price: $8.95
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    Price: $29.95
    Our Price: $8.95

    Minimum age: 8
    Availability: In stock.

    Buy Now or Add To Cart
    Item code: 99014

So, why do my kids
need this stuff?

Seriously, get some toys, go outside and play. It's good for you. Spend some quality time with your kids, your buddies or just get away from the TV and computer long enough for a good dose of sunshine.

Learn a new skill. Get some exercise. Make someone happy. Make yourself happy. Set-up some cans and knock them down, just to see if you can.

Teach your kids something about safety, posture, focus and concentration. It's easy if they have something fun to do while they're learning it.

The science of Physics was founded on the principles of ballistic motion. What better way to develop an interest in physics than to play with ballistic toys? And you know where that leads... First, physics, then math, engineering and economics. Next thing you know, he'll be studying medicine with plans to become a ridiculously high paid sports doctor with a keen knack for investing, all because someone bought him a projectile shooting toy gun as a kid. How's that for a reason?

Here's an even better reason- kids like to play with their parents and they like to compete. Do some target practice with your kids in the backyard. It's far better than watching re-runs of some lame TV show or turning into a video game zombie! Parents and kids need to interact. It's our goal to provide the toys that make it easy. We're doing our part, now you need to do yours.

So, one more time, get some toys and go outside and play!