Motor boat with foils which are retractable by tilting

Abstract

Motor boat comprising a support structure and at least one pair of similar foils arranged on each side of the support structure, each of said foils being defined by a wing and its support; the latter being retractable into the lower part of the structure and mounted so as to be slidable relative thereto; said foils being arranged so as to adopt at least two fixed positions, namely an “active” position in which they are deployed in similar positions and a “passive” position in which said supports are retracted into the support structure; characterized in that the boat is adapted such that the deployment of the foils comprises an initial movement of the supports in a substantially horizontal direction away from the vertical median plane of the support structure, followed by a tilting about an axis parallel or substantially parallel to the main axis of the boat.

Claims

1. A foil boat having a main axis in a driving direction comprising: a boat hull; and a pair of foils arranged one on each side of the boat hull, each foil of the pair of foils including a wing and a support, wherein each support is slidable relative to the boat hull, and at least partially retractable into the boat hull, such that the pair of foils are configured to adopt a first, active position where the pair of foils are deployed in similar positions, and a second, passive position in which each support is at least partially retracted into the boat hull, and wherein a displacement of the pair of foils from the second, passive position to the first active position includes an initial sliding displacement of each support in a direction away from the boat hull, the direction diverging from a vertical median plane of the boat hull, followed by rotation motion about an axis that is parallel or substantially parallel to the main axis of the foil boat, such that an angle of the wings increase relative to the vertical median plane to move the wings closer to a horizontal position, wherein the pair of the foils are deployed asymmetrically.

2. A foil boat having a main axis in a driving direction comprising: a boat hull; and a pair of foils arranged one on each side of the boat hull, each foil of the pair of foils including a wing and a support, wherein each support is slidable relative to the boat hull, and at least partially retractable into the boat hull, such that the pair of foils are configured to adopt a first, active position where the pair of foils are deployed in similar positions, and a second, passive position in which each support is at least partially retracted into the boat hull, and wherein a displacement of the pair of foils from the second, passive position to the first, active position includes an initial sliding displacement of each support in a direction away from the boat hull, the direction diverging from a vertical median plane of the boat hull, followed by rotation motion about an axis that is parallel or substantially parallel to the main axis of the foil boat, such that an angle of the wings increase relative to the vertical median plane to move the wings closer to a horizontal position, wherein the direction of the initial sliding displacement away from the boat hull forms a curved trajectory.

3. The foil boat as claimed in claim 1, wherein in the second, passive position, each wing is arranged to be parallel to a side wall of the boat hull.

4. A method for deploying the pair of foils of the foil boat as defined in claim 1, including the steps of: initially displacing each support away from the boat hull in the direction that diverges from the vertical median plane of the boat hull; and rotating each one of the pair of foils about an axis that is parallel or substantially parallel to the main axis of the foil boat.

5. A foil boat having a main axis in a driving direction comprising: a boat hull; and a pair of foils arranged one on each side of the boat hull, each foil of the pair of foils including a wing and a support, wherein each support is slidable relative to the boat hull, and at least partially retractable into the boat hull, such that the pair of foils are configured to adopt a first, active position where the pair of foils are deployed in similar positions, and a second, passive position in which each support is at least partially retracted into the boat hull, and wherein a displacement of the pair of foils from the second, passive position to the first, active position includes an initial sliding displacement of each support in a direction away from the boat hull, the direction diverging from a vertical median plane of the boat hull, followed by rotation motion about an axis that is parallel or substantially parallel to the main axis of the foil boat, such that an angle of the wings increase relative to the vertical median plane to move the wings closer to a horizontal position, wherein the support of each one of the foils has a curved shape, and the direction of the initial sliding displacement of the support away from the boat hull forms a curved trajectory along the curved shape of the support.

6. A foil boat having a main axis in a driving direction comprising: a boat hull; and a pair of foils arranged one on each side of the boat hull, each foil of the pair of foils including a wing and a support, wherein each support is slidable relative to the boat hull, and at least partially retractable into the boat hull, such that the pair of foils are configured to adopt a first, active position where the pair of foils are deployed in similar positions, and a second, passive position in which each support is at least partially retracted into the boat hull, and wherein a displacement of the pair of foils from the second, passive position to the first, active position includes an initial sliding displacement of each support in a direction away from the boat hull, the direction diverging from a vertical median plane of the boat hull, followed by rotation motion about an axis that is parallel or substantially parallel to the main axis of the foil boat, such that an angle of the wings increase relative to the vertical median plane to move the wings closer to a horizontal position, wherein the support is not movable relative to the wing of each one of the foils.

Description

DESCRIPTION OF THE INVENTION

(1) The present invention notably offers the advantage of remedying the problem described in the previous chapter.

(2) Generally speaking, it consists in initially deploying the foils along a substantially horizontal trajectory and then tilting them in the direction of the body of water.

(3) The invention relates more precisely to a motor boat including a bearing structure and at least one pair of similar foils arranged one on each side of the bearing structure, each of said foils being defined by a wing and its support; the latter being retractable into the lower part of the structure and mounted so as to be slidable relative thereto; said foils being arranged so as to adopt at least two fixed positions, namely a position referred to as the “active” position in which they are deployed in similar positions and a position referred to as the “passive” position in which said supports are retracted into the bearing structure; characterized in that the boat is adapted so that the deployment of the foils comprises an initial displacement of the supports in a substantially horizontal direction which diverges from the vertical median plane of the bearing structure followed by tilting about an axis parallel or substantially parallel to the main axis of the boat.

(4) By “substantially horizontal direction” must be understood a rectilinear trajectory that is horizontal or almost horizontal, a trajectory that is slightly curved but almost merges with a horizontal direction, or any other trajectory that is a projection of a horizontal direction.

(5) It should be noted that the invention offers in particular the advantage of reducing the overall size of the foils as they can be positioned under the deck of the boat.

(6) According to another embodiment of the invention, the foils are guided by two blocks that are adapted to allow the passage of sails of varying chord and twist. Advantageously, the system for mechanically raising the foils comprises a screw jack simultaneously secured to the bearing structure and to the foil.

(7) Generally speaking, the mechanism for deployment of the foils described in the present patent application can be combined with all the other features described in the patent application WO 2016/009409, in particular the dynamic simulator.

(8) The figure shows an embodiment in which the foils are similar but not symmetrically identical. The supports 4 are slightly asymmetrical so that in the passive position they can be stacked in the bearing structure 1. The figure illustrates three positions 2, 2′,2″ of the foils, i.e. the passive position 2, a transient position 2′ and the active position 2″.

(9) In the passive position, the wings 3 merge with the side walls of the bearing structure 1.

(10) In the active position, the distance between the ends of the wings 3″ is at least equivalent to twice the width of the bearing structure 1.

(11) During the deployment phase, the foils 2, 2′,2″ initially move along a slightly curved trajectory which diverges from the vertical median plane 5 of the bearing structure 1. There follows tilting of the foils 2′,2″ around an axis 6 directed in a direction parallel to the main axis of the boat. During this tilting, the free end 8 of each support 4 also undergoes rotation about the axis 6.

(12) It goes without saying that the invention is not limited to the examples described and illustrated in this document. It covers any mechanism as defined in the claims allowing the position of the foils to be modified when sailing.

NUMERICAL REFERENCES USED IN THE FIGURE

(13) 1 Bearing structure 2 Foil in passive position 2′ Foil in transient position 2″ Foil in active position 3 Wing in passive position 3′ Wing in transient position 3″ Wing in active position 4 Support in passive position 4′ Support in transient position 4″ Support in active position 5 Vertical median plane 6 Tilt axis 7 Support fee end 8 Support free end trajectory