LEGO GBC - Helicopter Sweeper, by Joel Sloan

The Helicopter Sweeper, created by Joel Sloan, is a cool compact sweeper Great Ball Contraption module, built using only the parts from the old Technic set 8068 “Rescue Helicopter”. Thanks to Joel building instructions, you can easily reproduce this module, designed with a simple mechanism: a rotating lift arm is pushing your favorite GBC balls, ones after the others, onto two parallel tubes constituting an exit ramp. The helicopter look of the module is really sympathic with its top rotor blades and its lateral propeller. Don’t put your fingers too close from this module however.