Catapult
thingiverse
The elastic band-powered catapult, designed in Sketchup, launches small projectiles. Its size requires scaling, so adjust accordingly. The launch angle is determined by the position of the small pole. Assembly involves inserting poles into designated holes; file tight ones if necessary. Glue the catapult head onto the arm and attach an elastic band through 'C'-shaped holes and around the arm for operation.
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