A device for producing energy includes an air-towed vessel, and at least one water current turbine linked to the vessel by at least one electric cable. The water current turbine is linked to the vessel by at least one mechanical linking cable to be towed by the vessel. The water current turbine is spaced apart from the vessel, which makes it possible to increase the diameter of the turbine and to reduce the interactions between the turbine and the vessel. Moreover, it is then possible to provide a plurality of water current turbines towed by the same vessel.

The invention concerns an airborne device comprising at least three supporting wings and a linking device, the wings being linked to each other by first flexible cables, each wing being further linked to the linking device by a second flexible cable, the linking device being linked to a third flexible cable intended to be linked to a base, the first second, and third cables being tensioned when the airborne device is carried in the wind.

A boat stabilizer having an upper harness for attachment to a vessel, the upper harness having an assembly control system for controlling attached wing assemblies, each wing assembly having a wing attached to the assembly control system and a wing mount attached to the wing and the assembly control system. The boat stabilizer may be further comprised of a controllable parasail comprising a parasail canopy, a plurality of parasail cords attached the parasail canopy, a parasail mount attached to the upper harness and the parasail cords, a parasail control rudder attached to each parasail cords, and yaw and pitch controllers, both of which are attached to the parasail control rudder. The assembly control system is configured to work in conjunction with the controllable parasail to provide the desired balance of vertical lift and forward propulsion to the attached vessel, while also providing directional control to the attached vessel.

A boat stabilizer having an upper harness for attachment to a vessel, the upper harness having an assembly control system for controlling attached wing assemblies, each wing assembly having a wing attached to the assembly control system and a wing mount attached to the wing and the assembly control system. The boat stabilizer may be further comprised of a controllable parasail comprising a parasail canopy, a plurality of parasail cords attached the parasail canopy, a parasail mount attached to the upper harness and the parasail cords, a parasail control rudder attached to each parasail cords, and yaw and pitch controllers, both of which are attached to the parasail control rudder. The assembly control system is configured to work in conjunction with the controllable parasail to provide the desired balance of vertical lift and forward propulsion to the attached vessel, while also providing directional control to the attached vessel.

The invention relates to a kite system comprising a kite (14), a line tree (24), a gondola (25), and a towing rope (15). The kite (14) is connected to the gondola (25) via the line tree (24), and the towing rope (15) extends between the gondola (25) and an attachment point (16, 55) installed in the ground. A pulling force which is exerted by the kite (14) during operation is transferred via a towing section (15, 24) which extends from the kite (14) to the attachment point (16, 55) via the line tree (24) and the towing rope (15). A separating device (40) which releases upon contacting water is arranged within the towing section (15, 24). The invention additionally relates to a separating device (40) which is suitable for a kite system.

The invention relates to a kite system comprising a kite (14), a line tree (24), a gondola (25), and a towing rope (15). The kite (14) is connected to the gondola (25) via the line tree (24), and the towing rope (15) extends between the gondola (25) and an attachment point (16, 55) installed in the ground. A pulling force which is exerted by the kite (14) during operation is transferred via a towing section (15, 24) which extends from the kite (14) to the attachment point (16, 55) via the line tree (24) and the towing rope (15). A separating device (40) which releases upon contacting water is arranged within the towing section (15, 24). The invention additionally relates to a separating device (40) which is suitable for a kite system.

A kite launching and landing assist device includes a cavity support portion in which a kite is detachably secured by tension of the tether when the tether is wound with a winch, and a cavity serving as an air channel is secured in a direction intersecting with a wind receiving surface of the kite, and includes a launching and landing buoy that is detachable from or detachable from the floating unit and is floatable.

A kite launching and landing assist device includes a cavity support portion in which a kite is detachably secured by tension of the tether when the tether is wound with a winch, and a cavity serving as an air channel is secured in a direction intersecting with a wind receiving surface of the kite, and includes a launching and landing buoy that is detachable from or detachable from the floating unit and is floatable.