Nerf PVC Mini Gun

grabcad

A 6 barrel mini gun for Nerf dart made mainly from PVC tubing with a few 3D printed parts. It uses an individual tank for each barrel with a poppet style valve piston to dump the tank air all at once when the individual barrel reaches the firing position on the trigger cam. The darts are loaded from a clip chain advanced by a Geneva mechanism timed to the loading cam. The barrels are rotated by a NEMA 23 stepper motor. The triggering is accomplished with a rod that functions as a shuttle valve. It alternatively fills the barrel tank and vents the poppet valve. The triggering rod has O-rings to keep balanced pressure on it. The whole system was designed in FreeCAD.