Accession Number : ADD017600

Title :   Vessel with Machinery Modules Outside Watertight Hull.

Descriptive Note : Patent, Filed 28 Apr 94, patented 23 May 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Levedahl, William J

Report Date : 23 May 1995

Pagination or Media Count : 27

Abstract : The invention is directed to an improved vessel configuration for high speed ships such as Naval Destroyers. The vessel has a long, slender tumble home (inward-sloped topsides) watertight hull and a deckhouse structurally integral with the watertight hull. All main machinery is modular and outside the watertight hull, freeing midship areas for personnel. Two removable, prealigned and pretested, steerable propulsor modules are attached to the stern after construction and are replaceable pierside. Each propulsor module includes a steerable pod aligned to the water inflow, a steering cylinder, and a streamlined strut connecting the pod to the steering cylinder. Two removable, power modules are mounted above the weather deck in a deckhouse. Each power module includes an intercooled, recuperated gas turbine, ship-service alternator, and a propulsion alternator. The present vessel provides global range, reduced lightship displacement, reduced cost, superior seakeeping, no seawater ballast, sharper turns and stops, and greatly reduced installed power, fuel consumption, and pollution. (MM)

Descriptors :   *SHIPS, *SHIP HULLS, *PATENTS, STEERING, HIGH VELOCITY, DISPLACEMENT, GAS TURBINES, CYLINDRICAL BODIES, EXTERNAL STORES, FUEL CONSUMPTION, MACHINES, ELECTRIC POWER, SPACE(ROOM), POLLUTION ABATEMENT, DESIGN CRITERIA, SEAKEEPING, MARINE PROPULSION, STRUTS, WATERTIGHTNESS, BALLAST, DESTROYERS, LIGHTSHIPS

Subject Categories : Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE