The primary goal of the Fall 2013 team was to design a centrifugal pump to mix stock solutions, with test designs utilizing a rotating arm that employed the pressure gradient due to rotation to bring dense solution located at the bottom of the tank to the top. End-of-semester tests showed high pump inefficiency due to large amounts of wasted input power due to drag on the rotating arm. The test results have prompted entire mixing redesign by the Spring 2014 team; it is likely the team will abandon the rotational pumping idea entirely in exchange for a rising/falling bucket concept. | 