Abstract: A sail furling apparatus having a fixed core for connection to a wind powered device is disclosed herein. A rotatable sail sleeve having a bore formed therein is rotatably mounted on the fixed core. A double sheet airfoil sail is connected to the rotatable sail sleeve. A boom sleeve is mounted beneath the rotatable sail sleeve and engages the core. A boom is connected to the boom sleeve and is positioned perpendicular to the core, the sail sleeve and the boom sleeve. A freely rotatable eccentric sheath substantially surrounds the sail sleeve. The freely rotatable eccentric sheath has a slot and the airfoil sail passes through the slot. A furling apparatus is used to rotate the sail sleeve to draw the airfoil sail into the eccentric sheath or release it from the eccentric sheath.

Abstract: An outrigger sailboat having a drive outrigger hull is disclosed herein. A pair of movable keels is rotatably connected to a bottom portion of the drive outrigger hull. The movable keels are adapted to rotate in opposite directions. A pair of masts is mounted on the outrigger hull. Each of the masts receives a sail. The drive outrigger hull is connected to a load hull by a connector frame. The outrigger sailboat is preferably sailed with the load hull to windward and the drive outrigger hull to leeward. The load hull holds the drive outrigger hull upright even in strong winds. The movable keels act as both keels and rudders to provide directional control.