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The Triple-Pult
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This is a spectacular three arm catapult that I call the Triple-Pult. It was built by Abel and my thanks go to him for letting us know about this great project. He is going to be making improvements to it but so far he tells us what he has:
I get a out 100ft out of it with eggs. 36x27 w 4ft rocker arms and 100lb resistance bands from sports authority.
So far we have the brake angle set at 45 degrees to give it a 3-2 ration of arc and power. we used 5/8n" dowels inside a 3/4"pvc pipe to relieve some tension from the ropes. but it bends under the set pressure. we are also going to change all dowels to 1" bolts for stability and less flex. the end caps will be lubricated with motor oil and we also have to change the pvc dowel spacers to aluminum tubing. big project for me and my nut job friends but after the upgrades ill send more pics and full specs. thank you for your time, your tutorials, and thank you for posting it for us. |
The MultiPult- This is a multiple shot automatic catapult. It fires five projectiles in rapid succession. Nice project and pretty easy to do. The MultiPult Rapid Fire Catapult
Mini Weapons of Mass Destruction: Build Implements of Spitball Warfare
PopularMechanics.com selection for one of The Best DIY and Home Improvement Books of 2009
We’ve come a long way from the Peashooter Era: with the advent of modern household products and office supplies—binder clips, clothespins, rubber bands, ballpoint pens, toothpicks, paper clips, plastic utensils, and (of course) matches and barbeque lighters—troublemakers of all stripes have the components needed to build an impressive, if somewhat miniaturized, arsenal.
Toy designer John Austin provides detailed, step-by-step instructions for each project, including materials and ammo lists, clear diagrams, and construction tips, for mayhem-loving MacGyvers. The 35 devices include catapults, slingshots, minibombs, darts, and combustion shooters. Build a tiny trebuchet from paper clips and a D-cell battery. Wrap a penny in a string of paper caps to create a surprisingly impressive “bomb.” Several of the projects even include variations where combatants mount laser pointer sights to their shooters to increase their accuracy.
Finally, once you’ve built your armory, the author provides plans for a Top Secret Concealing Book to hide your stash, as well as targets for shooting practice. Never let your personal space go undefended again!
Mini Weapons of Mass Destruction 2: Build a Secret Agent Arsenal
If you're a budding spy, what better way to conceal your clandestine activities than to miniaturize your secret agent arsenal? MiniWeapons of Mass Destruction 2 provides fully illustrated step-by-step instructions for building 30 different spy weapons and surveillance tools.
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