US 6,604,478 B2 · Hull configuration utilizing multiple effects for enhanced speed, range and efficiency

Abstract

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.

Claims20

Dependent claims

A vessel for traveling over a surface of a water, said vessel including a hull for supporting said vessel upon said water's surface wherein said hull has at least one air cavity that is adapted to receive pressurized air from a blower, said hull further comprising:

a first air introduction means for introducing said pressurized air from said blower into said at least one air cavity;
sealing side hull portions adapted to reduce air loss from said at least one air cavity wherein said sealing side hull portions extend substantially parallel to said vessel's direction of movement along said hull;
air lubricators for providing a lubricating air flow along said sealing side hull portions and within said hull;
and
a second air introduction means for providing a sealing airflow of pressurized air to an edge of said at least one air cavity wherein said second air introduction means provides air at a higher velocity than said first air introduction means.

2 more elements

Dependencies are inferred from the claim text.

Hull configuration utilizing multiple effects for enhanced speed, range and efficiency

Life of this patent

Hull configuration utilizing multiple effects for enhanced speed, range and efficiency

Life of this patent

Abstract

Claims20