The teams used to test their boat designs in wind tunnels and water tanks, but they now do most of it with computers
Teams in the America's Cup use software to model design changes to their boats
Emirates Team New Zealand's catamaran hydrofoils in the America's Cup. A dagger board in the center of each hull lifts the boat out the water, and the rudders at rear help with stabilization.
The 131-foot wing sail on Team Emirates New Zealand's America's Cup boat
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