DescriptionForces on sails for three points of sail.jpg
English: Boat A is close hauled. Boat B is on a beam reach. Boat C is on a broad reach.
VT = True wind speed
VB = Boat speed
VA = Apparent wind speed
FT = Force on sail tangential to sail cord (lift component)
FR = Driving force component
FLAT = Lateral component
Note that as the boat sails further from the wind, the Apparent wind becomes smaller and the heeling moment becomes less. Note also that the boat speed is highest on the beam reach.
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