Abstract: Propulsion wing of a vessel, having a sail, as well as a mast, defining a leading edge of the wing. The mast is segmented in sections. The wing is segmented in stages, each delimited by a lower spar and an upper spar connected to each section and extending substantially parallel to a horizontal plane. The sail is subdivided into at least two flaps, each associated with one stage, each flap movable between a deployed position in which the flap fills a space between the lower spar and the upper spar, thus offering a wind surface area, and a furled position in which the flap leaves open the space between the upper spar and the lower spar. The flaps of each stage are movable, independent of each other. The stages are movable in rotation with respect to the mast, independent of each other.