The F50 is a
one-design foiling catamaran used in the
SailGP
SailGP is an international sailing competition using high performance F50 foiling catamarans, where teams compete across a season of multiple grands prix around the world. Its reigning champions are Tom Slingsby's Australia SailGP Team, who wo ...
race series. The F50s are adapted from the
AC50s used in the
America's Cup, with modifications including new control systems and modular wingsails.
The F50s are one of the fastest racing classes in history, with a predicted top speed of 52.2 knots (96.6 km/h, 60 mph);
the current F50 speed record, achieved by the France SailGP Team at the
Range Rover France Sail Grand Prix in 2022, stands at 53.96 knots (99.94 km/h, 62.10 mph).
Three AC50s from the
2017 America's Cup
The 2017 America's Cup was the 35th staging of the America's Cup yacht race. The challenger, Emirates Team New Zealand, won by a score of 7 to 1 over the defender, Oracle Team USA. It was held on the Great Sound in Bermuda from June 17 to June 2 ...
were converted to comply with the F50 one-design rule to create the new
SailGP
SailGP is an international sailing competition using high performance F50 foiling catamarans, where teams compete across a season of multiple grands prix around the world. Its reigning champions are Tom Slingsby's Australia SailGP Team, who wo ...
fleet racing circuit.
Three more boats were built from scratch by Core Builders Composites to create an initial fleet of six boats crewed by teams from the United States, Australia, France, China, Japan, and the United Kingdom. For the
2020 SailGP championship, the Spain SailGP team used the F50 of the China SailGP team after their departure. A seventh F50 was commissioned for the Denmark SailGP team, which also joined for the 2020 SailGP championship.
Specifications
The F50s use a two-element
wingsail
A wingsail, twin-skin sail or double skin sail is a variable-camber aerodynamic structure that is fitted to a marine vessel in place of conventional sails. Wingsails are analogous to airplane wings, except that they are designed to provide lif ...
and
jib
A jib is a triangular sail that sets ahead of the foremast of a sailing vessel. Its tack is fixed to the bowsprit, to the bows, or to the deck between the bowsprit and the foremost mast. Jibs and spinnakers are the two main types of headsail ...
for propulsion. One removable section in the wing can be used to achieve mast heights of and to suit wind conditions. By the third event of the
2021-22 SailGP championship, SailGP plans to introduce a 29 m wingsail for use in extremely light conditions. In SailGP regattas, the mast height, jib, and equipment are selected in competitions by the Tech Team Operations Manager, following a consultation with the Regatta Director and representatives from each team.
Apart from the wingsheet, which is powered by two
grinders
Grinder may refer to:
Machinery
*Various types of grinding machine, used in a machining operation to refine the surface of materials
*Food grinders
**Blade grinder, includes food processors, blenders, electric coffee and spice grinders, etc.
**Co ...
, all trimming is hydraulically powered by electric motors and lithium-ion batteries.
This includes active pitch control of all appendages, daggerboard lifting/lowering, and the jibsheet. The reduction of one grinding position on board therefore allows the F50s to sail with just five crew. The geometry of the F50's daggerboards have been extended outside the maximum beam of the boat to provide more righting moment.
The F50s comprise a
one-design development class. However, unlike most one-design sail classes with fixed rules, the F50s are being constantly developed with changes implemented on all boats at the same time. This prevents technological arms races, while allowing performance improvements.
Crew
The F50s have a crew of five, consisting of a
helmsman
A helmsman or helm (sometimes driver) is a person who steers a ship, sailboat, submarine, other type of maritime vessel, or spacecraft. The rank and seniority of the helmsman may vary: on small vessels such as fishing vessels and yachts, the fu ...
, wing trimmer, flight controller, and two grinders. The flight controller controls the F50 using a double twist-grip device, which enables more accurate adjustment of the rake of the daggerboard. This relieves the helmsman, who previously flew the boat using twist-grips on the wheel, of flight control duties - allowing them to focus on tactics. Additionally, the F50s have active control of the rudder pitch; crews are no longer required to set and lock off the rudder pitch before the start of each race, as was the case with the AC50s in the 2017 America's Cup.
While racing, crews stay in the windward hull.
F50s in culture
F50s were featured in Christopher Nolan's ''
Tenet'' (2020). The scene featuring them was filmed in August 2019, following the
2019 Great Britain Sail Grand Prix in
Cowes. The F50s belonging to the Japan and United States SailGP teams were used, with each being rebranded and painted white and blue respectively.
Rome Kirby and
Tom Slingsby were two of the athletes involved in the filming of the scene.
References
{{SailGP
Catamarans
Hydrofoils
SailGP