Abstract: Sea trials of a 45 ft seine boat, fitted first with a conventional tip, and subsequently with a ducted tip, 36 in. diameter propeller have been conducted. The trials consisted of careful ...

Abstract: A novel velocimeter consisting of multiple orthogonal disks fitted with pressure transducers has been developed. Dynamic pressure differences are measured between the center of one disk face and ...

Abstract: All lifting surfaces that terminate in a moving fluid create tip vortices as a by-product. Tip vortices on marine propellers have two undesirable effects: they reduce the efficiency of the ...