A collapsible wing with a frame and a canopy, such that the frame transitions between a deployed state in which the canopy has an aerodynamic profile and a collapsed state with a reduced profile. The frame may have a central spar and two leading edge members pivotally connected to a hinge that slides along the central spar. The leading edge members have an orientation that extends outwardly from the central spar when the frame is in the deployed state and are generally aligned with the central spar when the frame is in the collapsed state.

A collapsible wing with a frame and a canopy, such that the frame transitions between a deployed state in which the canopy has an aerodynamic profile and a collapsed state with a reduced profile. The frame may have a central spar and two leading edge members pivotally connected to a hinge that slides along the central spar. The leading edge members have an orientation that extends outwardly from the central spar when the frame is in the deployed state and are generally aligned with the central spar when the frame is in the collapsed state.

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.

Disclosed is a hand-held wing rig for wind-powered sports, which is provided with a stiffening element for stiffening the front tube.

Disclosed is a hand-held wing rig for wind-powered sports, which is provided with a stiffening element for stiffening the front tube.