Sailboat rig

In a sailboat having a rotatable mast, in combination,

• twin booms pivotally connected to the lower part of the mast so as to swing independent of mast rotation in a horizontal plane together to the same side of the boat or separately to opposite sides of the boat, and
• a single, generally triangular sail passed around the mast and adapted to be rolled up thereon or unrolled therefrom when the mast rotates with one corner of the triangle comprising the head of the sail, the other two corners comprising the clews, and the base of the sail, where it passes about the mast, comprising the tack, the tack being releasably attached to the mast,
• said clews being adapted for outhauling one on each boom when said mast rotates in its unrolling direction whereby
• when said booms are together and said sail sections outhauled along their respective booms, one-half the unrolled said area is exposed to the wind to provide an efficient air foil leading edge at the mast for conventional sailing, when said booms are separated, the entire unrolled sail area is exposed to the wind for running and reaching, and when said booms are separated, said sail is fully unrolled, and said tack is released from said mast, the full area of the sail is exposed to the wind, as an unbroken air foil, separated from and without interference from the leading edge of the mast, for running and reaching.