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At 20 degrees apparent wind and 10 degrees AOA, a wing generates normal lift and drag.
Since lift is perpendicular to air flow, the driving force component is smaller while the heeling force component is getting larger.
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At 20 degrees apparent wind and 10 degrees
AOA, The Genoa is generating very small lift,
small drag and, no driving force.
Main sail AOA is 20 degrees, generating
normal lift and drag. Since lift is perpendicular
to air flow and since a main sail at 20 degrees
AOA generates larger drag than a wing, the
heeling force component is larger while the
driving force component is too small.
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