Wing sail, has wing formed of wing tip and wing tail, where wing tip and wing tail are moveable independent of each other in limited area around mast and filled with gaseous substance under overpressure

摘要

The sail has a wing formed of a wing tip (1) and a wing tail (2). The wing tip and the wing tail are moveable independent of each other in a limited area around a mast (3). The wing tip and/or the wing tail are filled with a gaseous substance i.e. air, under overpressure.