Instructables: exploring - play - trebuchet - mini - featured http://www.instructables.com Fri, 1 Aug 2014 09:39:42 PDT BLOX v1.01 Mini Siege Engines http://www.instructables.com/id/Mini-Siege-Engines/
Mini Siege Engines - More DIY How To Projects]]> http://cdn.instructables.com/FZC/PA0N/H19RT1K9/FZCPA0NH19RT1K9.SQUARE2.jpg http://cdn.instructables.com/FZC/PA0N/H19RT1K9/FZCPA0NH19RT1K9.SQUARE.jpg http://cdn.instructables.com/FZC/PA0N/H19RT1K9/FZCPA0NH19RT1K9.SMALL.jpg 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. Simple Catapult To fire: Load the projectile Firmly hold down the front of the cata...
By: WYE_Lance

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Mon, 30 Apr 2012 11:54:36 PDT
Launch It: Torsion Spring Catapult http://www.instructables.com/id/Launch-It%3a-Torsion-Spring-Catapult/
Launch It: Torsion Spring Catapult - More DIY How To Projects]]> http://cdn.instructables.com/FU4/PURA/F54HJ9RD/FU4PURAF54HJ9RD.SQUARE2.jpg http://cdn.instructables.com/FU4/PURA/F54HJ9RD/FU4PURAF54HJ9RD.SQUARE.jpg http://cdn.instructables.com/FU4/PURA/F54HJ9RD/FU4PURAF54HJ9RD.SMALL.jpg 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