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1. US20180162497 - Sailing vessel

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Claims

1. A sailing vessel having a hull, a mast, a keel extending from the underside of the hull and a keel canting mechanism for varying the angle of the keel about an axis extending longitudinally of the sailing vessel; the keel canting mechanism including a worm gear arranged for rotation about said axis, a worm in mesh with said worm gear and means for driving the worm; said sailing vessel including a mast canting mechanism for varying the position of the mast about a further axis extending longitudinally of the sailing vessel; said mast canting mechanism including a further worm gear arranged for rotation about said further axis, a further worm mesh with said further worm gear and means for driving the further worm; and including a further lock for locking the further worm gear in the angular position to which it has been rotated by said further worm.
2. The sailing vessel as claimed in claim 1 and including a lock for locking the worm gear in the angular position to which it has been rotated by the worm.
3. The sailing vessel as claimed in claim 2, wherein said worm gear has multiple apertures into which locking pins are insertable to lock the worm gear in the angular position to which it has been rotated by the worm.
4. The sailing vessel as claimed in claim 1 wherein said worm is a double-enveloping worm.
5. The sailing vessel as claimed in claim 1, wherein said further worm gear has multiple apertures into which locking pins are insertable to lock the further worm gear in the angular position to which it has been rotated by the further worm.
6. The sailing vessel as claimed in claim 1, wherein said further worm is a double-enveloping worm.
7. The sailing vessel as claimed in claim 1, wherein the keel extends from a rotational housing that extends axially around said longitudinal axis; wherein the rotational housing is hollow and a superior portion of the rotational housing is within the hull of the sailing vessel, a part of the rotational housing which extends below the hull when the keel is in a neutral position being generally cylindrical,
wherein an upper part of the rotational housing is of a generally truncated conical shape, the rotational housing having opposing lateral sides and each of said lateral sides having an upper portion that is profiled from fore to aft with an overall conical shape; the conical upper portion of each of the lateral sides being configured to act as a foil; the rotational housing being configured such that windward canting of the keel causes the windward lateral side of the rotational housing to be retracted into the hull and the leeward lateral side of the rotational housing to be deployed from the hull by the canting rotation, such that the profiled conical upper portion of the leeward lateral side of the rotational housing is in the water and acts as a foil promoting lateral resistance in the water and generating lateral lift which opposes leeward drift of the sailing vessel.
8. The sailing vessel as claimed in claim 1 and which includes a rigid rigging arrangement formed of the mast and triangular stays which articulates with a rigging canting mechanism.
9. The sailing vessel as claimed in claim 8 and including a further rigging arrangement having a triangular arrangement which is rigid between the mast, an extended bowsprit and a forestay.
10. The sailing vessel as claimed in claim 1 and including a rigid topmast spreading arrangement in the form of port and starboard topmast sprits having first ends connected to the mast and having their second ends braced apart by a topmast spar, and a closed-loop backstay arrangement from the top of the mast via the second ends of the topmast sprits and a backstay link at the stern of the sailing vessel.
11. A sailing vessel having a hull, a mast, a keel extending from the underside of the hull and a keel canting mechanism for varying the angle of the keel about an axis extending longitudinally of the sailing vessel; the keel canting mechanism including a worm gear arranged for rotation about said axis, a worm in mesh with said worm gear and means for driving the worm, said sailing vessel including a ballast bulb for providing ballast at the base of the keel, there being control apparatus for controlling adjustment of the ballast bulb in relation to the keel, wherein the ballast bulb includes: a first rotating mechanism for rotating the ballast bulb around a lateral axis of the ballast bulb to vary the pitch of the ballast bulb in relation to the keel and a second rotating mechanism for rotating the ballast bulb around a longitudinal axis of the ballast bulb to vary the roll of the ballast bulb in relation to the keel.
12. The sailing vessel as claimed in claim 11, wherein the control apparatus includes a pitch actuator and a roll actuator connected to the ballast bulb by means of wires between each quadrant of an upper surface of the ballast bulb and the keel.
13. A sailing vessel having a hull, a mast, a keel extending from the underside of the hull and a keel canting arrangement that is rotational about a longitudinal axis of the sailing vessel; the keel extending from a rotational housing that extends axially around the longitudinal axis; and wherein the rotational housing is hollow and a superior portion of the rotational housing is within the hull of the sailing vessel, a part of the rotational housing which extends below the hull when the keel is in a neutral position being generally cylindrical,
wherein an upper part of the rotational housing is of a generally truncated conical shape, the rotational housing having opposing lateral sides and each of said lateral sides having an upper portion that is profiled from fore to aft with an overall conical shape; the conical upper portion of each of the lateral sides being configured to act as a foil; the rotational housing being configured such that windward canting of the keel causes the windward lateral side of the rotational housing to be retracted into the hull and the leeward lateral side of the rotational housing to be deployed from the hull by the canting rotation, such that the profiled conical upper portion of the leeward lateral side of the rotational housing is in the water and acts as a foil promoting lateral resistance in the water and generating lateral lift which opposes leeward drift of the sailing vessel.