Vessel for operating on body of water, has foil including leading edge that is tilted at downward angle relative to horizontal, where leading edge is positioned less than or equal to specific chord length

摘要

The vessel (1) has a foil positioned proximate to an end of an aft hull portion (9) below a water surface, (8) and spaced from a hull (2). A leading edge of the foil is tilted at a downward angle relative to the horizontal, and is positioned less than or equal to 0.5 times of the chord length, where the aft hull portion leaves the surface of the water. The foil has a chord and profile in longitudinal cross section with a configuration to provide a lifting force. The tilt angle of the foil is measured with respect to the chord.