Abstract: A process for deployment of a tethered-wing traction system, including a step of flight of a traction wing (5) relative to a stowing mast (4), and including, before the flight step, a step of windsock folding of the traction wing (5), wherein: the median area (15) of the leading edge (16) is retained relative to the stowing mast (4) at a first height on the stowing mast (4); the lateral portions (19) of the leading edge (16) are retained relative to the stowing mast (4) at a second height at least on the stowing mast (4), which is lower than the first height, the leading edge (16) forming a windsock air inlet with a circular opening; the leading edge (16) forming a windsock air inlet with a circular opening; the trailing edge (17) is reclosed by bringing the lateral portions (19) of the trailing edge (17) towards one another.

Abstract: A traction system, notably for a ship, includes a fixed station, at least one first sail and one second sail, the first sail comprising a wing and being connected to a winch of the fixed station by a first hauling cable, the second sail includes a second wing and being connected to a winch of the fixed station by a second hauling cable. The fixed station includes a mast which is equipped with a first conveyor dedicated to mooring the first wing to this mast and with a second conveyor dedicated to mooring the second wing to this mast.

Abstract: A traction system for a watercraft, including a sail and a fixed station that includes a mast and a winch which is connected to the sail by a traction cable, the system further including a bottom part that is supported by the traction cable, and fold lines, each of which has an end that is attached to a leading edge of the sail, and another end that is supported by the bottom part. The fixed station includes a base that accommodates the bottom element when the sail is retracted by the winch; and structure for grasping each fold line and pulling same towards the mast so as to retract the leading edge against the mast and fold the sail once the winch has retracted same close to the station.

Abstract: A traction system for a watercraft, including a sail and a fixed station that includes a mast and a winch which is connected to the sail by a traction cable, the system further including a bottom part that is supported by the traction cable, and fold lines, each of which has an end that is attached to a leading edge of the sail, and another end that is supported by the bottom part. The fixed station includes a base that accommodates the bottom element when the sail is retracted by the winch; and structure for grasping each fold line and pulling same towards the mast so as to retract the leading edge against the mast and fold the sail once the winch has retracted same close to the station.

Abstract: A traction system, notably for a ship, includes a fixed station, at least one first sail and one second sail, the first sail comprising a wing and being connected to a winch of the fixed station by a first hauling cable, the second sail includes a second wing and being connected to a winch of the fixed station by a second hauling cable. The fixed station includes a mast which is equipped with a first conveyor dedicated to mooring the first wing to this mast and with a second conveyor dedicated to mooring the second wing to this mast.

Abstract: An air inlet is of a scarf type and the internal profile of the upper sections of its lip includes, with respect to the identical and symmetrical horizontal sections of the lip, an internal bulge that is bigger for a larger scarf angle and that is a maximum at the upper vertical section.

Abstract: The air inlet is of scarf type and the internal profile [5S(&thgr;)] of the upper sections [S(&thgr;)] of its lip 1 comprises, with respect to the identical and symmetrical horizontal sections (Sb) of the said lip, an internal bulge (10) which is all the bigger the larger the scarf angle and which is a maximum at the upper vertical section [S(0)].