Theres a really interesting show on the history channel about Alexander the Great and his invention of the Tosion Catapult and how he used it to assault the island city off Tyre of the coast of what is now Lebanon.
This catapult could launch a 30 pond rock 300 yards and a 20 pound iron arrow with great accuarcy at advancing troops impailing 4 and 5 at a time.
Really interesting show if you like old traditional weaponry
My son and I are in the process (but it's a bit too cold right now and too much snow) of building a catapult to launch jugs for arial shooting with our longbows.
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"I do not Hunt animals to Kill them. I kill animals because I Hunt." Roger Rothhaar
Art, we're building ours base on the photo below with a few modifications. Mainly, the arm (don't need a 4x4), and the stoper. We're also putting wheels and handles to transport it easier.
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"I do not Hunt animals to Kill them. I kill animals because I Hunt." Roger Rothhaar