Way back in high school I proposed this idea to literally drag energy from slow moving bodies of water.A long loop of joined barges.  Each barge has a  moveable vane which deploys downward into the water mass as the barge floats downstream and then retracts as the barge begins its upstream journey. This "loop" of barges is connected to a very large wheel, layed horizontally, onshore.  Even though the speed of the barges might be rather slow, the force of say twenty downstream barges being…See More