Hydrofoil

Abstract

A hydrofoil for a watercraft has at least one wing and one connecting rod for attaching the at least one wing to a mast. A conically tapered projection is provided on the connecting rod and a conical recess is provided on the wing which engage in one another. The wedge angle of the conical recess is greater than the wedge angle of the conically tapered projection in order to allow angular adjustment between the connecting rod and the wing. By means of a fixing device, the connecting rod can be braced against a portion of the conical recess and/or the wing can be braced against a portion of the conically tapered projection.

What is claimed is: 
     
         1 . A hydrofoil ( 1 ), comprising at least one wing ( 5 ,  6 ) and one connecting rod ( 4 ) for attaching the at least one wing ( 5 ,  6 ) to a mast, wherein a conically tapered projection ( 12 ) is provided on the connecting rod ( 4 ) and a conical recess ( 13 ) is provided on the wing ( 5 ,  6 ) that engage in one another, the wedge angle (α 2 ) of the conical recess ( 13 ) being greater than the wedge angle (α 1 ) of the conically tapered projection ( 12 ) in order to allow angular adjustment between the connecting rod ( 4 ) and the wing ( 5 ,  6 ), and that a fixing device ( 20 ) is provided by means of which the connecting rod ( 4 ) can be braced against a portion of the conical recess ( 13 ) and/or the wing ( 5 ,  6 ) can be braced against a portion of the conically tapered projection ( 12 ). 
     
     
         2 . The hydrofoil of  claim 1 , wherein the fixing device ( 20 ) has a threaded opening ( 21 ) transverse to the projection ( 12 ) and a threaded bolt ( 22 ) that is screwed into the threaded opening ( 21 ) for the purpose of adjusting the angle. 
     
     
         3 . The hydrofoil of  claim 2 , wherein the threaded opening ( 21 ) is formed on the projection ( 12 ), and the threaded bolt ( 22 ) that is screwed into same can be braced against a conical inner wall portion ( 19 ) of the conical recess ( 13 ) for the purpose of adjusting the angle. 
     
     
         4 . The hydrofoil of  claim 2 , wherein at least two pairs of a threaded opening ( 21 ) and a threaded bolt ( 22 ), respectively, are provided, it being possible to brace one of the threaded bolts ( 22 ) against a conical inner wall portion ( 19 ) of the conical recess ( 13 ) on the wing ( 5 ,  6 ) and to brace the other threaded bolt ( 22 ) of such a pair against an inner wall portion ( 19 ) that is situated ( 19 ) opposite the first-mentioned conical inner wall portion ( 19 ) of the conical recess ( 13 ) of the wing ( 5 ,  6 ). 
     
     
         5 . The hydrofoil of  claim 3 , wherein at least two pairs of a threaded opening ( 21 ) and a threaded bolt ( 22 ), respectively, are provided, it being possible to brace one of the threaded bolts ( 22 ) against a conical inner wall portion ( 19 ) of the conical recess ( 13 ) on the wing ( 5 ,  6 ) and to brace the other threaded bolt ( 22 ) of such a pair against an inner wall portion ( 19 ) that is situated ( 19 ) opposite the first-mentioned conical inner wall portion ( 19 ) of the conical recess ( 13 ) of the wing ( 5 ,  6 ). 
     
     
         6 . The hydrofoil of  claim 1 , wherein the connecting rod ( 4 ) and the wing ( 5 ,  6 ) are supported and braced against one another by means of mutually facing axial support surfaces ( 16 ,  17 ). 
     
     
         7 . The hydrofoil of  claim 6 , wherein a tension anchor ( 24 ) is inserted transverse to the longitudinal direction of the connecting rod ( 4 ) into a connection portion ( 15 ) of the wing ( 5 ,  6 ), and a tension bolt ( 25 ) that is supported on the connecting rod ( 4 ) is screwed into the tension anchor ( 24 ). 
     
     
         8 . The hydrofoil of  claim 7 , wherein the tension anchor ( 24 ) extends transverse to the longitudinal direction of the connecting rod ( 4 ) through the wing ( 5 ,  6 ). 
     
     
         9 . The hydrofoil of  claim 7 , wherein the tension anchor ( 24 ) extends through the conical recess ( 13 ) of the wing ( 5 ,  6 ). 
     
     
         10 . The hydrofoil of  claim 4 , wherein the connecting rod ( 4 ) and the wing ( 5 ,  6 ) are supported and braced against one another by means of mutually facing axial support surfaces ( 16 ,  17 ). 
     
     
         11 . The hydrofoil of  claim 10 , wherein a tension anchor ( 24 ) is inserted transverse to the longitudinal direction of the connecting rod ( 4 ) into a connection portion ( 15 ) of the wing ( 5 ,  6 ), and a tension bolt ( 25 ) that is supported on the connecting rod ( 4 ) is screwed into the tension anchor ( 24 ). 
     
     
         12 . The hydrofoil of  claim 11 , wherein the tension anchor ( 24 ) extends transverse to the longitudinal direction of the connecting rod ( 4 ) through the wing ( 5 ,  6 ). 
     
     
         13 . The hydrofoil of  claim 12 , wherein the tension anchor ( 24 ) extends through the conical recess ( 13 ) of the wing ( 5 ,  6 ). 
     
     
         14 . The hydrofoil of  claim 1 , wherein the conical recess ( 13 ) of the wing ( 5 ,  6 ) is formed on a rod-shaped connecting portion ( 15 ) of the wing ( 5 ,  6 ). 
     
     
         15 . The hydrofoil of  claim 1 , wherein the conically tapered projection ( 12 ) of the connecting rod ( 4 ) has a non-circular cross-sectional profile. 
     
     
         16 . A board ( 2 ) with a hydrofoil ( 1 ), the hydrofoil ( 1 ) comprising
 at least one wing ( 5 ,  6 ) and one connecting rod ( 4 ) for attaching the at least one wing ( 5 ,  6 ) to a mast,   wherein a conically tapered projection ( 12 ) is provided on the connecting rod ( 4 ) and a conical recess ( 13 ) is provided on the wing ( 5 ,  6 ) that engage in one another, wherein a wedge angle (α 2 ) of the conical recess ( 13 ) is greater than a wedge angle (α 1 ) of the conically tapered projection ( 12 ) in order to allow angular adjustment between the connecting rod ( 4 ) and the wing ( 5 ,  6 ), and   wherein a fixing device ( 20 ) is provided by means of which the connecting rod ( 4 ) can be braced against a portion of the conical recess ( 13 ) and/or the wing ( 5 ,  6 ) can be braced against a portion of the conically tapered projection ( 12 ).