Purdy, Harry D.2011-06-272011-06-271948-09https://hdl.handle.net/11299/108110Bureau of Ships Contract NObs-34208 Task Order 2The report describes apparatus designs which were largely evolved by John F. Ripken, Associate Professor of Hydraulics; James S. Holdhusen, Research Fellow, was project leader and developed test procedures. Frank Dressel was in charge of the physical construction of the equipment.en-USReport