Exit Body Dynamics from Water to Air of Common Shapes

As drones become increasingly more popular within many communities both professional and hobbyists, their capabilities increase. There are needs for both aerial and underwater drones for surveillance and research purposes but there is room for improvement for increased efficiency entering and exiting water. This research aims to show how a body would enter water from air and vice versa. There is substantial research done on entry dynamics of solid bodies, but little exists on the exit from water to air of solid bodies. Thus, this work focuses on exit dynamics. For a starting point we have looked at three basic shapes that have been studied for entry dynamics, a cone, sphere, and cube. We are doing this in a static water drop tank that has been modified from a gravity propelled object to a motor pulley system to bring the objects into and then back out to test both scenarios. This apparatus is also geared to rotate around an axis to test the objects entering and exiting at different angles of attack.