Accession Number : ADD018687

Title :   Variable Shape Control Fin Assembly for Water Vehicles

Descriptive Note : Patent, Filed 22 Apr 96, patented 26 Aug 97

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Cipolla, Jeffrey L

Report Date : 26 Aug 1997

Pagination or Media Count : 10

Abstract : A control fin assembly for a water vehicle includes a multiplicity of fins connected together and grouped in an array mounted on the vehicle. A portion of the array is of a shape memory material responsive to heat to assume selected shapes different from the shape of the array portion otherwise. The array portion is electrically conductive and adapted to increase in temperature upon application of electrical current thereto to effect the assumption of the selected shapes. The invention further relates to a control fin for a water vehicle, at least a portion of the fin being of a shape memory material responsive to heat to assume selected shapes different from the shape of the fin otherwise, the fin portion being electrically conductive and adapted to increase in temperature upon application of electrical current thereto to effect the assumption of the selected shapes.

Descriptors :   *UNDERWATER VEHICLES, *FINS, *PATENTS, MANEUVERABILITY, ELECTRIC CURRENT, UNDERWATER NAVIGATION, HYDRODYNAMICS, DRAG REDUCTION, SHAPE MEMORY ALLOYS

Subject Categories : Submarine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE