The boat being raced in the Louis Vuitton America’s Cup World Series is the AC45 – sometimes also called the AC45f. It is a one-design 44ft foiling catamaran (that’s what the ‘f’ in AC45 stands for).
The design was developed after the 72ft AC72 design that was raced for the 34th America’s Cup in San Francisco in 2013 and conceived as a scaled back, less expensive and more easily transportable version.
Once up on foils, these boats are very fast, reaching peak speeds of 37-38 knots.
They have two large L-foils and two spade rudders with T-foils.
They are crewed by five people: a helmsman, wing trimmer, floater, jib/gennaker trimmer and bowman. There is also space behind the aft beam for a guest racer/observer.