The young Wales-based builder Pi Super Yachts recently unveiled its Dragonship 80 concept, an over-the-top sailing trimaran it plans as its flagship vessel, in association with McPherson Yacht Design. For sails, the Dragonship 80 uses three large airfoils similar to the ones on the boats that competed in the most recent America’s Cup competition. Instead of being controlled by sheets, the yacht’s airfoils are supported by masts that can make complete rotations clockwise and counterclockwise. This allows the sy…