The Aerodynamics of Sails 



Fig. 11a - Herreshoff Number One section 



° VL._2^^6 



8 10 12 14 



ANGLE OF ATTACK -DEGREES 



Fig. lib - Herreshoff Number Two section-- 

 draft forward 



lifting surfaces. Because of the constraints of the maximum of heeling and 

 pitching moments that can be resisted by a given hull, there is a limit on usable 

 sail spans. These constraints, coupled with the large lift coefficients, result in 

 large coefficients of induced drag. The major effect of the lower boxindary is a 



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