AC75

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AC75
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Ineos Team UK AC75
Current specifications
Crew 11 + 1 optional guest
Type Foiling Monohull
Construction carbonfiber
Rig bermuda sloop
LOA 22.86 m (75 ft)
LOH 20.70 m (68 ft)
Beam 5.00 m (16 ft)
Draft 5.00 m (16 ft)
Mast height 26.50 m (87 ft)
Mainsail area 145 m2 (1,560 sq ft)
Jib / Genoa area 90 m2 (970 sq ft)
Spinnaker area N/A
Development
Year 2017 –
Role inshore racing

The AC75 (America's Cup 75) is a racing yacht used in the 2021 America's Cup match and planned to be used for the 37th America's Cup and 38th America's Cup matches. The 23 m (75 ft) monohulls feature wing-like sailing hydrofoils mounted under the hull, a soft wingsail,[1] and no keel.[2]

The rule

Following the 2017 America's Cup, winners Royal New Zealand Yacht Squadron accepted a notice of challenge from Circolo della Vela Sicilia stipulating a monohull would be used in 2021. Conceptual graphics of a monohull with soft sails and topside canting hydrofoils were released on 21 November 2017, and the first draft of the class rule was published by the defender and the challenger of record on 29 March 2018.[3] The return to monohulls with soft sails after three America's Cups on multihulls with wingsails is reminiscent of earlier America's Cup classes and seaworthy traditions, but the rule included hydrofoils to attract high performance crews and large TV audiences.[4]

Under the protocol, each competing club could build two yachts, but two-boat testing was excluded except during the PRADA Christmas Cup on 17–20 December 2020, and for the defenders during the PRADA Cup 15 January – 22 February 2021. To reduce design and testing costs of the class unique class features, the rule specified foil controlling systems all manufactured by defender team and foil arms all manufactured by the Challenger of Record's builder Persico Marine.

List of AC75 yachts

Syndicate Name Shipyard Launched Competitive history Current Notes
New Zealand Emirates Team New Zealand Te Aihe ETNZ 6 September 2019 Trial boat (never raced) sold to Ailinghi for AC37 [5]
United States American Magic Defiant American Magic 14 September 2019 Trial boat (never raced) unknown [6]
Italy Luna Rossa Prada Pirelli Luna Rossa Persico Marine 2 October 2019 Trial boat (never raced) [7]
United Kingdom INEOS Team UK Britannia Carrington Boats 4 October 2019 Trial boat (never raced) [8]
United States American Magic Patriot American Magic 16 October 2020 Raced in the 2021 Prada Cup current training boat for AC37 [9][10]
United Kingdom INEOS Team UK Britannia Carrington Boats 17 October 2020 Raced in the 2021 Prada Cup [11]
Italy Luna Rossa Prada Pirelli Luna Rossa Persico Marine 20 October 2020 Winner of the 2021 Prada Cup
Lost the 2021 America's Cup to Emirates Team New Zealand (7-3)		 [12]
New Zealand Emirates Team New Zealand Te Rehutai ETNZ 18 November 2020 Winner of the 2021 America's Cup [13]

The visible differences between designs have been commented by most of the yachtbuilding community and the specialized press as each of the boats were launched.[14]

Speeds

Potential speed of 50 kn (93 km/h; 58 mph) was claimed based on computer simulations.[15]

Notable high speeds actually recorded in racing were:

  • 49.1 kn (90.9 km/h; 56.5 mph) by Te Rehutai (in 15 and 19 kn (28 and 35 km/h; 17 and 22 mph)) on 17 December 2020.[16]
  • 50.25 kn (93.06 km/h; 57.83 mph) by Britannia during day 4 of the Prada Cup 23 January 2021.
  • 53.31 kn (98.73 km/h; 61.35 mph) by Patriot (American Magic) during day 1 of the Prada Cup Semifinals (in breeze gusting up to 22 kn (41 km/h; 25 mph)) on 29 January 2021.[17]

Controversy

Following the release of the canting hydrofoil design in 2017, Brazilian shipwright Manoel Chaves contacted ETNZ to inform them that he held a patent[18] for the proposed design.[19] Team New Zealand apparently ignored correspondence from Chaves' patent attorneys for over two years before simply dismissing the allegations.[20] ETNZ defended themselves with the statement "every good idea has 1000 fathers".[21]

See also

References

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  8. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  11. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  12. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  13. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  14. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  15. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  16. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  17. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  18. ↑ NZ 740860 
  19. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  20. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  21. ↑ Lua error in package.lua at line 80: module 'strict' not found.

External links

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