Accession Number : ADD018428

Title :   Quick Change Fin Assembly for Buoyant Test Vehicles.

Descriptive Note : Patent, Filed 21 Feb 95, patented 28 Jan 97,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Nedderman, William H , Jr

Report Date : 28 Jan 1997

Pagination or Media Count : 8

Abstract : A quick change fin assembly for attachment to a buoyant test vehicle (BTV). The fin assembly comprises a fin body bolted to a T-shaped base portion. A resilient sheet is placed between the fin body and the base to lessen the transmission of vibrations from the fin body to the base. The assembly is attached to the truncated cone surface of the tail portion of the BTV. For each fin a longitudinal T-shaped slot is cut into the surface of the tail portion starting from the truncated end and extending along the axis of the BTV. The T-shaped base slides into the slot from the truncated end to secure the fin assembly in a radial direction with respect to the axis of the BTV. A conical end piece is threaded onto the tail portion to clamp the fin assembly in an axial direction. The exposed surface of the T-shaped base is shaped to conform to the tail portion and to provide a smooth transition between the tail portion and the fin body.

Descriptors :   *TEST VEHICLES, *ACOUSTIC MEASUREMENT, *FINS, *BUOYANCY, *PATENTS, *SUBMARINE NOISE, VIBRATION, TAIL ASSEMBLIES, SHAPE, SURFACES, TRANSITIONS, ASSEMBLY, CONICAL BODIES

Subject Categories : Submarine Engineering
      Acoustics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE