Patent ID: 8601966

Claim:
A set of stowable rigid sails with an aerodynamic profile, comprising: a plurality of sails, each sail comprising: a number of vertically extendable masts, a number of substantially horizontal frame sections that longitudinally and vertically move on said masts from a stacked position, in which said frame sections keep in contact with each other, to a deployed working position in which said frame sections are placed along the masts, and a plurality of rigid panels to conform the side surface of each sail, said panels being hinged with the frame sections and to each other and said panels being operative between two positions: (i) an unfolded position, in which said frame sections are deployed and said panels are substantially coplanar and substantially longitudinally aligned in a substantially vertical direction to conform the side surface of each sail, and (ii) a folded position, in which the panels are stacked and kept in contact with each other, together with the frame sections.