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US 7,243,607 B2Granted
Wind driven sailing craft
AssigneeCompass Marine Development Limited
InventorsJohn Chesney, Reginald Clarke, Andrew Claughton
Life of this patent
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Abstract
A wind driven sailing craft is disclosed with a hydrofoil element which provides variable lift to the stern of the craft to maintain a level trim when the craft is operated under power propulsion. The hydrofoil element includes a hydrofoil wing which rotates on a transverse axis to provide the desired lift.
Claims16
A wind driven sailing craft with a hull of the displacement type with a keel or keels, comprising a hydrofoil element and power propulsion means at the stern, and wherein the hydrofoil element at the stern:
- is attached to the underside of the hull by two struts;
- is adapted to rotate on a transverse axis to provide variable lift to the stern of the sailing craft;
- has a first position for use when the craft is propelled under sail power, in which it provides substantially no lift to the stern of the sailing craft;
- and
- has additional variable positions for use when the sailing craft is propelled under the power propulsion means, which provide lift to the stern of the sailing craft to such a degree that the sailing craft is maintained at a substantially level trim.
2 more elements
Dependencies are inferred from the claim text.