(57) A wind-propelled craft is disclosed which comprises a hull (1) supporting a pair
of unstayed masts (43 and 44) arranged to pivot about an axis lying in an approximately
horizontal plane between a first position, in which one mast (43 or 44) extends substantially
vertically and the other (44 or 43) extends generally at right-angles thereto away
from the hull (1), and a second position, in which the relative configuration of the
masts (43 and 44) is reversed. Each mast (43,44) has a sail (41, 42) attached thereto;
whereby, in use, one sail can be trimmed to the wind to provide forward propulsion,
while the other sail simultaneously provides upward lift tending to counteract rolling
or heeling force applied to the hull (1) by wind impinging on the first sail. A steering
control system is also described in which a steering link passes from a control point
through the region of the pivot point of a mast to a rudder (2).
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