Marine propulsion system

Details Marine propulsion system Marine propulsion system

1992-01-21

1999-09-28

Oberleitner, Robert J.

Ships

Hull or hull adjunct employing fluid dynamic forces to...

Having fluid channeling or entrapping configuration

B63B 132

Patent

active

059570784

ABSTRACT:
A propulsion system for high-speed powerboats whereby the water level in a tunnel containing a surface-piercing propeller is controlled by admitting external air into the tunnel through an air outlet in the tunnel forward of the propeller. The air is admitted through a duct which has an air intake on the exterior of the boat. The duct may contain a valve which may be opened or closed to control the air supply. Particular configurations of the tunnel and the air supply system are disclosed which maximize the ability to control the water level in the tunnel and the degree to which the propeller is submerged as well as best utilize the configuration of the vessel.

REFERENCES:
patent: 3091206 (1963-05-01), Cale
patent: 3203389 (1965-08-01), Cale
patent: 3604385 (1971-09-01), Reider
patent: 3608512 (1971-09-01), Thompson
patent: 3789792 (1974-02-01), Smith
patent: 3793980 (1974-02-01), Sherman
patent: 4165703 (1979-08-01), Burg
patent: 4353318 (1982-10-01), Williams
patent: 4689026 (1987-08-01), Small
patent: 4746314 (1988-05-01), Levi
patent: 4924797 (1990-05-01), Solia
"Levi Drive Unit" brocure from Stewart Supply Inc.
Powerboat, "If At First You Don't Succeed . . . ", Jun., 1986.
"Italcraft" brochure from 1985 and 1986 Miami Boat Show.

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