The air compressor unloader valve is what makes the “psssssst” sound when the motor shuts off after reaching operating ...

You don’t need any of that chemical nonsense to just have fun, though, as this compressed air ... is achieved via a ball valve. Of course, if you build such an air cannon yourself, just be ...

Such is the case with this 3D-printed compressed ... glory days of the Air Hogs line of toys, which he subsequently built a plane around. The engine was simple, with a ball valve that admitted ...