One last Archimedes

Okay, one last from Archimedes. He also designed the Archimedes screw, a screw blade inside a cylinder. When the screw is rotated, liquids or powders are lifted up from a lower tank into a higher position - e.g. to pump bilge water out of the hull of a ship, or to pump water into a canal. This principle was used a few different Great Ball Contraption (GBC) modules. The GBC is a collaborative Rube Goldberg contraption to move a bunch of LEGO balls around a loop. Each module accepts a load of balls and delivers it to the next. Look on YouTube to see fascinating videos of these in action. Anyway, here is a module by svbrckm and another by akiyuky.