| 摘要 |
A hull configuration for a vessel that utilizes multiple effects to reduce friction between the vessel and the water's surface is provided by the present invention. In various embodiments, a surface effect is employed such that a supporting cushion of air is provided underneath the hull to substantially isolate portions of the hull from coming into contact with the water's surface. A blower is used to provide pressurized air to the air cushions. The inlet of the blower is positioned in the direction of the vessel's movement such that a ram air effect decreases the power required by the blower. An amount of thrust is also generated by the forward placement of the blower inlet. The vessel has a superstructure that is shaped to create a low pressure zone above the vessel. This low pressure zone creates a lifting body effect such that the friction between the hull and the water's surface is reduced. Boost ports induce a venturi effect by providing a high pressure air flow at the water air boundary of the air cushion. Thus, the boost ports decrease the time required to re-establish an operating pressure in the air cushions after a venting has occurred. The above discussed aspects of the invention result in enhanced speed, range and efficiency for the vessel. Thus, the present invention has particular applicability to fast ferries, military patrol craft and landing crafts.
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