Instructables: exploring - play - trebuchet - mini - featured Thu, 26 Nov 2015 20:36:24 PST BLOX v1.01 Mini Siege Engines
Mini Siege Engines - More DIY How To Projects]]> WYE_Lance Ah catapults - a classic and exciting engineering project that introduces students to fundamental ideas in physics and engineering like energy transformation, trajectory, and structural strength. Materials Craft sticksCraft cubesCraft cubes with holeSkewerSmall cupRubber bandsHot glueTape ...
By: WYE_Lance

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Mon, 30 Apr 2012 11:54:36 PDT
Launch It: Torsion Spring Catapult
Launch It: Torsion Spring Catapult - More DIY How To Projects]]> i make shooting things True catapult that uses a extremely tightly wound string to power it, it fits in the palm of your hand, it cost under $20. all supplies can be purchased at Michaels. fires small foam objects 40 feet aprox 1053 feet to scale, about 7.5FPS when firing a 14g weight (twice the weight of the catapult its...
By: i make shooting things

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Thu, 16 Aug 2007 10:31:55 PDT