Rubber Band Pull-Back Car

thingiverse

This is a simple rubber band powered pull-back car. It has few unique pieces and goes together simply, and can be a base to attach other printable car bodies to. It prints well but requires substantial clean-up, at least on my printer. The ABS slides well on itself but obviously not as well as a bearing. I've found it works better with added weight on top, otherwise it just skips and hops. I am planning a second version using bearings and a ratcheting system, with a narrower body to reduce from three to two separate prints. This revision will have inset nut slots and magnetic mounts for interchangeable bodies. Instructions Print two of CarChassis.STL and one of CarPlate2.STL. Clean the prints very well! Test fit and check tolerances to ensure wheels spin freely. Using glue (I used hot glue) assemble the axles. The longer axles combine to form the front axle; the rear both slot into the pulley. Let the glue dry. Cut a rubber band and glue one end to the flatted part on the pulley. Place the other under the rubber band lock, apply a dab of glue, and tighten the tensioner. If desired, glue on tread to the rear wheels. Combine to two halves of the body, and play!