Water-jet propulsion unit for vessels

Details Water-jet propulsion unit for vessels Water-jet propulsion unit for vessels

1978-05-08

1980-11-04

Blix, Trygve M.

Marine propulsion

Jet drive

Direction control for fluid jet

60221, 114121, B63H 1100

Patent

active

042313155

ABSTRACT:
Water-jet propulsion unit for vessels which includes a water duct having an inlet and outlet portions and an impeller disposed in the water duct. The outlet portion has a variable outlet nozzle which can discharge water downwardly when desired to produce a lift force for lifting the stern of the vessel. The arrangement provides an improved rolling stability under a stationary condition and is also effective to decrease a drag force under the "hump" condition.

REFERENCES:
patent: 3121994 (1964-02-01), Aldropp
patent: 3185124 (1965-05-01), Spence
patent: 3413950 (1968-12-01), Gravenstreter
patent: 3426724 (1969-02-01), Jacobson
patent: 3982494 (1976-09-01), Posti
patent: 4015556 (1977-04-01), Bordiga

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