But the first of the new AC 50 boats have yet to be built, and teams have been testing innovative wing and foil systems on modified AC 45s referred to as “sport boats” at their bases in Bermuda and around the world.

After the World Series event in New York, the crews head to Chicago, where they will race on Lake Michigan in June. The small gap between the races provides little time for rest.

“The whole show here will be packed up on Monday and we’ll be sailing the sport boats on Tuesday,” said Andrew Henderson, known as Hendo, who is the Australian shore operations manager for Oracle Team U.S.A.

His voice was starting to crack from shouting across the yard all week. He oversees the safety of the sailing team on and off the water, including when the towering wing sails are precariously swinging in the breeze from a crane before they are attached to the boats.

For the teams with bases in Bermuda, the testing of the sport boats is just as important as the World Series races on the Hudson. Although the AC 50 is designed to specifications, there is latitude to develop wing and hydrofoil control systems that are being tested on the trial boats weekly. The first to master control of the new class will be able to outmaneuver the others and keep the pedal down longer.