The F50 is a one-design foiling catamaran used in the SailGP race series, derived from the AC50 catamarans used in the 2017 America's Cup. Modifications include new control systems and modular wingsails. The name F50 is an abbreviation of "Foiling" and "a hull length of 50 feet". These boats are known for their speed, with the current record at 56.1 knots (103.93 km/h, 64.58 mph), achieved by the Rockwool Denmark SailGP Team in 2025.
The F50 has a crew of six, including a helmsman, wing trimmer, flight controller, two grinders, and a strategist. The flight controller uses a double twist-grip device for accurate daggerboard rake adjustment. The boats are equipped with lithium-ion batteries to power the hydraulics. The F50s are equipped with interchangeable daggerboards and rudders to adapt to different wind conditions. There are also four different wing sizes: 18m, 24m, 27.5m and 29m. The boats are built by Core Builders Composites. Originally, six boats were built, but the fleet has grown to 13 for the 2026 season. An F50 can cost around $4 million.