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.