Extended bow and multiple air cushion air ride boat hull

Details Extended bow and multiple air cushion air ride boat hull Extended bow and multiple air cushion air ride boat hull

1989-12-29

1991-03-19

Basinger, Sherman

Ships

Building

Antifriction surfaces

180126, B63B 138

Patent

active

050001078

ABSTRACT:
An improved performance marine surface vessel that includes a pressurized gas cavity in its underside that is restrained by hull structure and hull seals supports some 80 to 90 percent of vessel weight which results in much greater hull efficiencies. The gas cushion is normally supplied with pressurized gas by mechanical apparatus such as a powered blower. Significant advancements include multiple seals placed in the gas cushion to divide its functions, use of differential gas cushion portion pressures to provide quality improvements, zero and/or low angle to horizontal surfaces on sidehull forward lower and/or aft seal lower surfaces insures good gas sealing and maximum hull efficiencies, aft seal angled surfaces and forwardly extending bow provide good ride qualities in a seaway, a seal divider member passes through seals thus adding to hull strength and providing separation of gas cushion portions, and controllable aft movable seal members provide a way to control gas cushion and therefore hull orientation. Other features include a hollowed out underside of a seal divider and steps in lower hull surfaces to minimize wetting area drag of the divider, a way to easily install and remove seal elements with the hull waterborne, and a narrower hull beam forward than aft which results in more attractive and easier riding bow sections. The above advancements may be used singularly or in various combinations.

REFERENCES:
patent: 3027860 (1962-04-01), Priest
patent: 3146752 (1964-09-01), Ford
patent: 3518956 (1970-07-01), Girodin
patent: 3742888 (1973-07-01), Crowley
patent: 4046217 (1977-09-01), Magnuson

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