Accession Number : ADD017854

Title :   Compact Water Jet Propulsion System for a Marine Vehicle.

Descriptive Note : Patent, filed 30 Sep 94, patented 19 Dec 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Peterson, Frank B ; Dai, Charles M ; McMahon, John F

Report Date : Dec 1995

Pagination or Media Count : 18

Abstract : The invention is directed to an improved water jet propulsion system for a marine vehicle. The water jet propulsion system of the present invention incorporates an unconventional and compact design including a short, steep, hydrodynamically designed inlet duct adapted for mounting to the surface of the vehicle hull and extending internally thereof, a water jet pump having an inlet end attached to the outlet end of the inlet duct, a motor for rotating the pump impeller, a drive shaft located completely outside of the flow path connecting the motor with the pump impeller, a flow passage for discharging accelerated flow received from the pump in a generally rearward direction, and a steering and reversing mechanism pivotably mounted about a substantially vertical axis to the aft portion of the vehicle hull for redirect accelerated flow received from the outlet nozzle so as to provide maneuvering capability to the vehicle.

Descriptors :   *MARINE PROPELLERS, *PATENTS, *WATERJET PROPULSION, MANEUVERABILITY, STEERING, ACCELERATION, FLOW FIELDS, VERTICAL ORIENTATION, FLOW, VEHICLES, WATER SUPPLIES, DUCT INLETS, JET PUMPS, WATER JETS, DRIVE SHAFTS, PUMP COMPONENTS, IMPELLERS

Subject Categories : Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE