Pros and Cons of ‘Fathead’ Mainsail

As the multihull trend picks up, PS looks into the design implications of squared-off mainsails.

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The triangular mainsail of a Marconi rig has never been the most aerodynamic shape. The narrow tip produces wasteful tip vortices and little lift. Developmental catamaran classes began experimenting with full-length battens and massive increases in roach, but the sails were hard to shape. The leach would hook to windward if the sail was too […]
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