AC75

The AC75 (America's Cup 75 class) is a 75ft foiling monohull sailboat class, governing the construction and operation of the yachts to be used in the 2021 America's Cup.

AC75
Development
Year2017 -
No. built4 launched
Roleinshore racing
Boat
Crew11 + 1 optional guest
Boat weight6,450 kg (14,220 lb) lightship
7,600 kg (16,800 lb) loaded
Draft5.00 m (16 ft)
Hull
TypeFoiling Monohull
Constructioncarbonfiber
LOA22.86 m (75 ft)
LOH20.70 m (68 ft)
Beam5.00 m (16 ft)
Hull appendages
Generaltopside canting T-wing foils
Ballastset in foils
Rudder(s)centerline T-wing rudder
Rig
Rig typebermuda sloop
Mast length26.50 m (87 ft)
Sails
Generaltwo semi-battened mainsail skins, one headsail skin
Mainsail area145 m2 (1,560 sq ft)
Jib/genoa area90 m2 (970 sq ft)
Spinnaker area200 m2 (2,200 sq ft)

The boat will have advanced features such as canting ballasted T-wing hydrofoils mounted on port and starboard topside longitudinal drums, a double-skinned semi-battened mainsail and no keel.[1]

Due to the hydrofoils movement resemblance to the like of amphibian's it is nicknamed the "toad boat".

The rule

Following the 2017 America's Cup, the winning club Royal New Zealand Yacht Squadron accepted a notice of challenge from Circolo della Vela Sicilia that stipulated a monohull in the ship's particulars. Conceptual graphics of a monohull with soft sails and topside canting hydrofoils were proposed on November 21st, 2017, and the first revision of the class rule was published by the defender and the challenger of record on March 29th, 2018.[2] The return to monohulls with soft sails after three America's Cups on multihulls with wingsails is reminiscent of old America's Cup classes and seaworthy traditions, but the rule includes hydrofoils to attract high performance crews and large TV audiences.[3] Under the protocol, each competing club may build two yachts, but two-boat testing is not allowed except for the defender during the challenger selection series. In order to reduce design and testing costs of the class' unique features, the rule specifies foil controlling systems all manufactured by the defending club's team and foil arms all manufactured by the Challenger of Record's builder Persico Group.

The boats
clubyacht namechristening datebuildernotes
 Royal New Zealand Yacht SquadronTe AiheSeptember 6th, 2019Team New Zealand[4]
 New York Yacht ClubDefiantSeptember 14th, 2019American Magic[5]
 Circolo della Vela SiciliaLuna RossaOctober 2nd, 2019Persico Group[6]
 Royal Yacht SquadronBritanniaOctober 4th, 2019Carrington Boats[7]
gollark: What? That doesn't follow either.
gollark: Depends on the god.
gollark: Out of all possible gods, the ones which pay particular to attention to humans are probably a very small subset, although I guess given that we exist the probability of any god, should one exist, being one of them, is higher.
gollark: The lower-dimensional geometry mostly generalizes perfectly.
gollark: But you can totally do that, if not visualize it.

See also

References

3D model of the AC75, americascup.com

  1. Hillary Noble (5 April 2018), America's Cup designer spotlight, North Sails
  2. AC75 class rule version 1.1, americascup.com, 29 June 2018
  3. Bernie Wilson (21 November 2017), Team New Zealand unveils radical foiling monohull, Associated Press
  4. Team New Zealand launch their first AC75, ameriascup.com, 6 September 2019
  5. A first flight and a name, ameriascup.com, 14 September 2019
  6. 'Luna Rossa', the new AC75 presented by Prada, ameriascup.com, 2 October 2019
  7. Ineos Team UK name their first AC75 'Britannia', ameriascup.com, 4 October 2019


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