I am missing a picture of your design. I think of his design as one tube with a "screw" inside. "... one tube wrapped around from top to bottom" I can't picture. Is the tube in the form of the screw? Yes six tubes would move six times the water, requiring six times the force, but the force would still be reasonable for one person.hi all I was looking at an Archimedes screw with one tube wrapped around from top to bottom moving water upwards and I had a thought, what if there were more tubes wrapped around ,say six, would this increase water movement without increasing strain on the screw or is this a stupid question? thanks... kev