Hydrofoil arrangement
AssigneeElektrofoil AB
InventorAlexander Sahlin
Life of this patent
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Abstract
The invention relates to a hydrofoil arrangement for a hydrofoil craft with at least one fully submerged lifting wing. The hydrofoil arrangement includes at least two struts pivotally arranged on the hydrofoil craft with each strut being connected to a lifting wing. The struts are arranged with their centers of effort of hydrodynamic forces behind the pivot axes of the struts during forward travel of the hydrofoil craft. They are arranged to pivot relative to the hydrofoil craft when the hydrofoil craft experiences a disturbance in roll-angle. This results in a transversal movement of the hydrofoil craft relative to the water surface during forward travel. The hydrofoil arrangement also increases the roll-stability for a hydrofoil craft.
Claims14
1-13. (canceled)
Hydrofoil arrangement for a hydrofoil craft with at least one fully submerged lifting wing, the hydrofoil arrangement comprising at least two struts to be pivotally arranged on the hydrofoil craft, each strut being connected to a lifting wing, characterized in, that the struts are to be arranged with their centers of effort of hydrodynamic forces behind the pivot axes of the struts during forward travel of the hydrofoil craft, whereby the struts, when the hydrofoil craft during forward travel experiences a disturbance in roll-angle resulting in a transversal movement of the hydrofoil craft relative to the water surface, are arranged to pivot relative to the hydrofoil craft where the struts when pivoting are arranged to actuate through a direct mechanical coupling at least one means for inducing transversal displacement of the resulting lifting wing's centre of effort in the direction of the transversal movement of the hydrofoil craft in order to modify the transversal distribution of pressure on the at least one lifting wing, whereby the hydrofoil craft is arranged to roll back to equilibrium.
Hydrofoil craft with a hydrofoil arrangement comprising at least two struts to be pivotally arranged on the hydrofoil craft, and at least one lifting wing arranged to be fully submerged, wherein each strut is connected to a lifting wing, characterized in, that the struts are arranged with their centers of effort of hydrodynamic forces behind the pivot axes of the struts during forward travel of the hydrofoil craft, whereby the struts, when the hydrofoil craft during forward travel experiences a disturbance in roll-angle resulting in a transversal movement of the hydrofoil craft relative to the water surface, are arranged to pivot relative to the hydrofoil craft where the struts when pivoting are arranged to actuate through a direct mechanical coupling at least one means for inducing transversal displacement of the resulting lifting wing's centre of effort in the direction of the transversal movement of the hydrofoil craft in order to modify the transversal distribution of pressure on the at least one lifting wing, whereby the hydrofoil craft is arranged to roll back to equilibrium.
Dependencies are inferred from the claim text.