The invention relates to a watercraft having a hull (10) which has a hydrofoil assembly (20) in the region of the stern (12) and another hydrofoil assembly (30) in the region of the bow (11), the hydrofoil assemblies (20, 30) each having hydrofoils (21, 31) arranged on both sides of the hull (10). To achieve a stable position in the water while ensuring good driving dynamics under a wide range of conditions, according to the invention the hydrofoil assemblies (20, 30) are coupled to at least one adjustment unit (22, 32) such that the bow-side hydrofoil assembly (20) and the stern-side hydrofoil assembly can each be at least partially individually height adjustable (FIG. 1).

Wakeboat hull control systems and methods are provided to monitor the orientation of the wakeboat hull in the surrounding water, and to automatically control wakeboat ballast components to achieve or maintain desired hull orientations. Systems and methods are provided to measure, store, and recall hull orientation. Systems and methods are also provided to enable automated action to improve the safety, automation, performance, convenience, and marketing advantage of wakeboat ballast systems.

Wakeboat hull control systems and methods are provided to monitor the orientation of the wakeboat hull in the surrounding water, and to automatically control wakeboat ballast components to achieve or maintain desired hull orientations. Systems and methods are provided to measure, store, and recall hull orientation. Systems and methods are also provided to enable automated action to improve the safety, automation, performance, convenience, and marketing advantage of wakeboat ballast systems.

Wakeboat hull control systems are provided that can include a first accelerometer operatively associated with the hull of the wakeboat to measure the acceleration of the hull along a first axis; a second accelerometer operatively associated with the hull of the wakeboat to measure the acceleration of the hull along a second axis, the first axis being non-parallel to the second axis; and processing circuitry calculating the rotation of the hull of the wakeboat about a third axis based on the acquired measurements. Wakeboat hull control methods are provided that can include using the processing circuitry to calculate the rotation of the hull of the wakeboat about a third axis based on the acquired measurements.

Wakeboat hull control systems are provided that can include a first accelerometer operatively associated with the hull of the wakeboat to measure the acceleration of the hull along a first axis; a second accelerometer operatively associated with the hull of the wakeboat to measure the acceleration of the hull along a second axis, the first axis being non-parallel to the second axis; and processing circuitry calculating the rotation of the hull of the wakeboat about a third axis based on the acquired measurements. Wakeboat hull control methods are provided that can include using the processing circuitry to calculate the rotation of the hull of the wakeboat about a third axis based on the acquired measurements.

A system and method involving hydro-lifters for achieving attitude and control of a watercraft including at least one elongate planar surface, at least one actuator mounted to the hull of the watercraft and pivotally connected to a planar surface. The system using at least one containment shelf-bracket fastened to the underside of the hull forming a non-fixed containment area, between an upper surface of the containment shelf-bracket and the hull, to capture the planar surface and provide a support surface on which the planar surface may rest and allowing forward, aft, and vertical slidability of the planar surface. A method for calculating optimal surface area of the planar surfaces for fuel efficiency by obtaining the measurements of an overall length of the hull and maximum beam of the hull, multiplying the measurement, multiplying the value by 1-3%, and dividing the resulting number by the quantity of planar surfaces.

A system and method involving hydro-lifters for achieving attitude and control of a watercraft including at least one elongate planar surface, at least one actuator mounted to the hull of the watercraft and pivotally connected to a planar surface. The system using at least one containment shelf-bracket fastened to the underside of the hull forming a non-fixed containment area, between an upper surface of the containment shelf-bracket and the hull, to capture the planar surface and provide a support surface on which the planar surface may rest and allowing forward, aft, and vertical slidabilty of the planar surface. A method for calculating optimal surface area of the planar surfaces for fuel efficiency by obtaining the measurements of an overall length of the hull and maximum beam of the hull, multiplying the measurement, multiplying the value by 1-3%, and dividing the resulting number by the quantity of planar surfaces.

A watercraft vessel with at least one planing hull, in the form of a single unitary hull or with two or more interconnected hulls, each hull having at its bottom portion a deadrise angle in the interval 5-70 and provided with at least one water-deflecting surface which extends rearwardly and outwardly in relation to a keel region and which is oriented and configured so as to create a lifting force, and also a forward thrust on the hull. The forward thrust is caused by a lateral spray water stream, which is redirected rearwardly by the water-deflecting surface. The latter should be located laterally outwardly of but adjacent to an approximately triangular bottom part which is submerged at the planing speed. The hull will also provide a smoother ride than conventional, planing hulls, especially in heavy sea.

A sailing yacht (I) comprising a hull (S) and two drift blades (1,1) coupled to said hull (S), each of said drift blades (1,1) being fixed pivoted to said hull (S) in a symmetrical position with respect to the other blade (1, 1) from opposite side with respect to the longitudinal axis (X) of said hull (S) for rotating independently relative to the other blade (1,1) about a rotation axis (Y,Y) not necessarily parallel to said longitudinal axis (X), and around a rotation vertical axis (R, R) so as to modify the angle of incidence with respect to the flow line of the water, with the possibility when sailing of having ballast (Z,Z) positioned in various positions dynamically modified: each ballast (Z, Z) attached to the respective blade (1,1) and separated; both ballasts (Z, Z) attached to one drift blade (1); both ballasts (Z, Z) attached to the other drift blade (1); both ballasts (Z, Z) attached to said two drift blades (1, 1) and joined.

A sailing yacht (I) comprising a hull (S) and two drift blades (1,1) coupled to said hull (S), each of said drift blades (1,1) being fixed pivoted to said hull (S) in a symmetrical position with respect to the other blade (1, 1) from opposite side with respect to the longitudinal axis (X) of said hull (S) for rotating independently relative to the other blade (1,1) about a rotation axis (Y,Y) not necessarily parallel to said longitudinal axis (X), and around a rotation vertical axis (R, R) so as to modify the angle of incidence with respect to the flow line of the water, with the possibility when sailing of having ballast (Z,Z) positioned in various positions dynamically modified: each ballast (Z, Z) attached to the respective blade (1,1) and separated; both ballasts (Z, Z) attached to one drift blade (1); both ballasts (Z, Z) attached to the other drift blade (1); both ballasts (Z, Z) attached to said two drift blades (1, 1) and joined.