Air-Powered Rocket

thingiverse

This rocket attaches to a 1-inch PVC pipe for compressed air-powered launches. Our record distance reached 306 feet, as seen in this video (http://www.youtube.com/watch?feature=player_detailpage&v=TydK261hhFI#t=26s). For optimal printing, we recommend a .3 mm layer thickness with four additional shells at a speed of 30 mm/sec. The projectile features a solid hemisphere tip, the solidity of which is determined by infill percentage (we used 40%). As for the compressed air tank, a 3-inch ABS pipe with end caps was utilized, along with a bicycle valve stem and threaded sprinkler nipple. Gasket adhesive filled gaps between inserts and holes, while hot glue provided extra security. End caps were then ABS-glued to the pipe. An automatic sprinkler valve released air, activated by a 9-volt battery connected to a switch. Launch pressure was typically set at 60 psi, resulting in distances of 240 to 280 feet. Safety precautions include wearing hearing protection, avoiding shooting at people or objects, and ensuring launcher security. Start with lower pressures during testing before increasing.