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I recently saw a TV show about the most american activity ever invented ; "Punkin Chunkin." One category on it was torsion powered catapults. (some others were human powered, air cannons, centrifugal force, and so on.) I used a 2x4 for the base, and small bits of wood that the rubber bands attached to, with the help of screws. I twist the pvc around and around, then I aim it and let it go. The extra pvc pipe you see is just to stop the shaft of the catapult from hitting the ground. It fires about 15-20 feet.
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16
Dec 13, 2011. 6:58 PM
Higgs Boson
says:
Higgs Boson
says:
I am going to make one of my large trebuchet soon.
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70
Dec 13, 2011. 6:59 PMfreeza36 (author)
says:
freeza36 (author)
says:
Did you fix it
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16
Dec 13, 2011. 7:04 PMHiggs Boson
says:
Higgs Boson
says:
still working on that.
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70
Dec 13, 2011. 7:36 PMfreeza36 (author)
says:
freeza36 (author)
says:
i find it hard to believe that you are working on that at the same time as commenting in ibles
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16
Apr 27, 2012. 12:06 PMHiggs Boson
says:
Higgs Boson
says:
It's getting closer.
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16
Dec 13, 2011. 6:34 PMHiggs Boson
says:
Higgs Boson
says:
Bungee cords work better than the rubber bands on the catapults.
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70
Dec 13, 2011. 6:38 PMfreeza36 (author)
says:
freeza36 (author)
says:
I hadn't taken pictures of the bungee cord one I made
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