Ships – Displacement-type hull – Multiple hulls
Patent
1995-06-06
1997-03-18
Basinger, Sherman
Ships
Displacement-type hull
Multiple hulls
114 67A, 114272, B63B 112
Patent
active
056112947
ABSTRACT:
An improved multi-hull gas cushion supported marine vehicle that is, in its preferred embodiment, capable of transition to airborne surface effect operation is presented. This marine vehicle, known as SeaCoaster, has optional elongated knife shaped bows that slice into waves, very fine entry and low angle of divergence supporting gas cushions, water rejecting steps that extend high onto the sidehulls, and retractable water stabilizers to insure optimum performance in heavy seas. The retractable water stabilizers are in the form of inverted-T hydrofoils and/or small boat shaped members. Several variations of hydrofoil configurations are presented. It also has special, normally inverted-V shaped, gas cushion and wetdeck aft seals to insure minimum effect of wave impacts in those areas. The gas pressurization system normally includes powered blowers where a flap-like sealing device can be installed to seal gas leakage. This allows a gas pressurizing blower to either maintain cushion gas pressure for minimum draft or evacuate the gas cushion from minimum above water profile. The latter is valuable for patrol boat applications where a minimum radar signature is desired. Connecting ducts between gas cushions can include venturi's that restrict pressure pulses in one gas cushion from traveling to another gas cushion. Retractable or fixed sidewings are optionally proposed to add aerodynamic lift when SeaCoaster is airborne. These sidewings may include outrigger hulls for added stability and improved aerodynamic efficiencies.
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Basinger Sherman
Burg Paulette Renee
Van Der Wall Robert J.
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