Onager

 OnagerImage result for torsion catapult
Image result for onager catapult

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ReleaseImage result for release mechanism for catapult

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Project Proposal

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Project Proposal- Joey and I would like to build a torsion catapult. Basically you have your wood base and support bar. Unlike a trebuchet where the catapult works with counter weight this one uses rope/torsion. So as your pull back mechanism brings the arm back the rope becomes tighter and tighter. Once you unhook the mechanism the rope throws the arm forward into the supporting arm bar. When the arm his the arm bar the sling carries the object forewords then it flys out of the sling and becomes a projectile. 
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about us

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My name is Jayce  Collins i'm in 11th grade at south plantation high school. I have been in Mr. Martins class for 3 years now this is my favorite class because i enjoy building robots and accomplishing things in my life i also like to play football and lacrosse . I am Joseph Avery. I am a señor at South Plantation High. I am a tutor for Mu Alpha Theta and a member of the MMA club. I want to attend USF or the University of Florida.
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Week 14 Thursday

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Today the rope ended up snapping and breaking on us as of right now the catapult is out of commission until we retrieve more rope. we added more wood support beams 4 X 4 across bottom of the cross bar and two 2 X 6 X 18 on the outside of catapult so that the wood did not snap on us again. i added eye hooks on back 2 X 6 board as our release mechanism. we also added three more 2 X 4 on top of post so the arm stopped earlier and launched the object in to the air. 
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