Wing profile sail

A wing profile sail having a sailcloth (2, 3) which encloses an inner space shaped as an airfoil, said sailcloth (2, 3) including openings (9) with a one-way closing mechanism to permit said inner space to be filled with air;

• said wing profile sail further comprising
• a body (11) inflatable by air, located at a luff of the sail entirely within said inner space,
• wherein said body tapers upward with a circular cross section and is conical when extended in height and inflated with air to engage against a front edge (1) of the sailcloth (2, 3);
• wherein two sides of the sailcloth (2, 3) respectively extend back from said front edge (1) and are engaged together at a rear edge of the sailcloth (2, 3);
• an after part (7) engaged between said two sides at the rear edge extending into the inner space as an intermediate sailcloth (13) which serves as the one-way closing mechanism when covering said openings (9);
• and
• wherein said two sides of said sailcloth (2, 3) are engaged together by a bottom area (16) to complete closure of said inner space
• wherein the inner space is equipped with adjustable control lines (10) between the sides of the sailcloth (2, 3) to influence a profile of the sailcloth.