Windsurfing board, the special feature of which is a rig which can be reefed and trimmed

摘要

The present invention differs from the hitherto customary rig for windsurfers in three decisive points: A) the mast, which is drop-shaped in cross-section, can be turned as desired about its longitudinal axis in relation to the angle of incidence of the apparent wind, so that B) the sail battens of the loosely guided sail can be tightened or relieved; C) the sail can be reefed on the water. Sail positions and mast positions in optimum form are possible due to A) and B). Transversely set mast with bulbous sail, downwind. Inclusion of the lee side of the mast in the sail, sailing with flowing sheets. Likewise when luffing, or further turning and thus flatter sail and separation of flow from the mast to reduce the sail pressure. Generating an S-shaped wing profile by relieving the leech, for further pressure reduction during increasing wind. The reefing possibility is an additional safety feature, necessary in order to be able to reduce the sail area in the face of a suddenly increasing wind.