The basic principle of that powerful multi-hull is similar to the AC45 catamaran. But the size requires far higher technical requirements. The parameters are as in all previous classes set by a rule In the drafting of Rule 72 was  the design and engineering office Morelli and Melvin involved. This company had a lot of experience in building catamarans. Among others they have been involved in the design of D.Conner's HS-3 catamaran and the pitch bow of Oracles BOR90.(2010). It is a "box rule" with narrow technical limits  but gives still each team the opportunity for some changes at the hulls, the wing, the head sails, the L-shaped underwater foils, the rudders  and the dragger-boards. During the first training phase 30 sailing days within the time from from 1 July 2012 up to 01.31.2013 have been authorized. The planned wing was originally 107 ft. = 33 m high (the mast in the IACC class is 32.5 m long). There were some considerations to introduce in the AC72 class a removable sail extension, too. But decided then to a 40 m long wing. The catamaran is steered by wheels, placed either on each hull or a platform amidships.(s.Oracle)
Due to the short time interval of 3 years and the high technical and financial costs, only 4 teams will participate with AC72s in the Louis Vuitton resp. America's Cup. Oracle Racing (USA) – as the defender and the challengers  Emirates Team NZ (NZL), Artemis Racing (SWE) and Luna Rossa (ITA). Team Koreas challenge is questionable.
Oracle Racing Defender of the 34th America's Cup The team was founded in 2000 and has brought back he America's Cup to the USA after its 2:0 victory over Alinghi 5. Since this Cup was held with multi-hulls, it was obvious that 2013 could be sailed with catamarans. Through the trimaran BOR 90 Oracle has a know how advantage and is the favourite. In August 2012 the first AC 72 was christened. A 2nd Yacht has been built later on In October 2012 their first boat USA-17f lipped over in a training in the San Francisco Bay when both bows dipped under a front wave. The catamaran was destroyed and its parts spread and collected over the whole Bay. The catamaran has been repaired, a spare wing was ordered to New Zealand and delivered in early January in San Diego. By the loss of this boat Oracle got a considerable training residue until the 2nd boat is ready.
Oracle Racing Team USA (ORTU) Defender of the 34th America's Cup
Country:USA / Defender of the 34th America's Cup Country:AC 45: USA 4 Spithill,  USA 5 Coutts Sailnumber:AC 72: USA 17 Syndicate/Team: Oracle Racing / USA Principal : Larry Ellison CEO: Russell Couts General Manager: Grant Simmer Yacht Club: Golden Gate Yacht Club Skipper: James Spithill, Russell Couts  2013 © ACEA  GG12-SFOO-0   8861 ©  ACEA GG13-SFOFEB-00
The repaired catamaran # 17 is back on the water in February 2013 . The 40m high wing requires a powerful crane boom.
At 40 knots (72 km/h) the crew will be less relaxed.
The catamaran after the rollover. The moveable flaps on the wings are broken off and were washed away by the flow from the Bay of San Francisco.
The first AC72 catamaran has set  its two  headsails.
The AC72 is properly trimmed, further sailing manoeuvres not provided.
The crew can train to optimize the speed
The first catamaran before the accident
Emirates Team New Zealand Challenger for the 34th America’s Cup
After the crash of the team in the AC 2000 and a victory in the LVC 2003 New Zealand's team under Grant Dalton, Dean Barker and the financial support of Emirates Airlines is again a strong team that is the favorite among the challengers. The New Zealanders also helps  the sophisticated yacht- and its supply-industry. Oracle itself orders his wings at Core Builders in Warkworth. Videos show that the Kiwis are not afraid of hard trainings in extremely strong winds. In safety training the crew is learning safe jumps from a great height. The crew members also carry a small pressurized air bottle and a knife. For the case they should be pressed in a rollover by the trampoline net under the water. Analysis of the photos from Oracle capsized AC72 catamaran show that crew members were hanging in about 14 m height on the trampoline. For the AC World Series the team sail an AC45 For the LVC and the AC  a second AC72 is under construction.
Emirates Team New Zealand
(Last used information from january 2013)
The New Zealanders also helps  the sophisticated yacht- and its supply-industry.
Country /Challenge:New Zealand / Challenger 34th America's Cup Syndicate/Team:Emirates Team New Zealand CEO: Grant Dalton Yacht Club:  Royal NZ Yacht Squadron Skipper: Dean Barker 2013 © ACEA CC130403 - 101 © ACEA CC130403 - 1046 © ACEA CC130403 - 1245 © ACEA CC130403 - 736
Good to see are the steering wheels, the "coffee- grinder" with the coupled winches and several crew members on the safety net, the trampoline.
The bent dragger-board with the L-shaped foil is on the windward side pulled up, on the leeward side lowered about halfway.
All photographs show the NZL-5, the second AC72 catamaran of ETNZ
The wing carries on the top already the Loius Vuiiton Cup logo
Artemis Racing Challenger of Record 34th America’s Cup
Artemis Racing Challenger of Record Among the ancient Greeks the bow armed Artemis (who was imported later by the Romans as Diana) was the goddess of the hunt, but also the patroness of women and children. Artemis Racing is a Swedish sailing team that has made a good name on famous regattas, such as the Extreme Sailing Series, the RC44 Championship or the Vulcain Trophy Tour Paul Cayard is an AC veteran, who won as helmsman under Dennis Conner the 1995 Citizen Cup and who reached 2000 with his own team in Auckland the LVC finals. After Mascalzone Latino had cancelled his challenge because of financing difficulties and hence the Challenger of Record, On the technical side the team still faces initial difficulties. During a towing test with the hull they feared some structural weaknesses. The wing broke during training. A 2nd wing had been delivered.. On May 9, 2013, the ARTEMIS Racing AC72 overturned and capsized at  moderate weather,The catamaran broke into many components. The Briton and two-time Olympic gold medal winner  Andrew "Bart" Simpson was killed
Artemis Racing is a Swedish sailing team that has made a good name on famous regattas, such as the Extreme Sailing Series,
Country /Challenge: Sweden / Challenger 34th America's Cup Sailnumber: AC 45 Artemis Red,  Artemis White Syndicate/Team: Artemis Racing Chairman: Torben Tötnqvist CEO: Paul Cayard Yacht Club: Kungliga Svenska Segel Sällskapet Principal Designer: Juan Kouyoundijan   Skipper: Loick Peyron  Nathan Outteridge  2013
© Sander van der Borch /Artemis Racing Launch
In Memoriam Andrew “Bart” Simpson
The team will be sponsored by PRADA respectively its owner. Patrizioio Bertrelli Luna Rossa Challenge has registered as the last challenger for the LVC 2013 and was so pressed for time. Therefore it has signed with Emirates Team NZ a so-called "strategic alliance". First they bought from New Zealanders for an undisclosed sum, the design of a wing together with its complex platform, but constructed itself its own wing and the head-sails. The hull was built in Italy, the rest in New Zealand. Luna Rossa trained in Auckland and moved in March 2013 to San Francisco. The alliance between the two teams moved in a gray area and was suspiciously watched by the two other teams. In the AC 45 World Series Luna Rossa has run two catamarans, the Piranha and the Swordfish. The construction of a second AC72 was questionable and at the end abandoned. The hulls  and parts of the wing are metallized and give the catamaran a mirror like appear.
Luna Rossa Challenge 2013  Challenger for the 34th America's Cup
© ACEA  First Sailing day in the Hauraki Gulf
© ACEA  U3C1171
The extendible boom of the jacked-up car-crane has an estimated length of 55-60 m.
Emirates Team New Zealand  "foiling" with both hulls out of the water. The windward side "draggerboard" is raised. 
."Foiling" (sliding) comes from the term "Hydrofoiling". That means the AC72 lifts at greater speed and winds of about 10 knots and especially downwind, completely out of the water and sails on sliding surfaces (the "foils" = hydrofoils) at the rudders and the draggerboards. Each of the 2 draggerboards  carries an inward, L-or J-shaped (Artemis I) wing. At the bottoms of the rudders are the T-shaped "elevators", a rigid, symmetrical or asymmetrical, elliptical wing. (As "elevators" they lift the boat out of the water, but can -just as the rudder itself -be moved only horizontally). In thousands - as says the team - processing and test hours ETNZ developed the "foiling" The first tests on the water took place in September 2012. This technique has been successfully adapted by Oracle, Luna Rossa and Artemis. With this technique, the boats reached until now unimaginable speeds. The New Zealanders sailed on the 18.July 2013 with 44.3 knots to the 80 km/h mark. The "foils" were not specified in the AC72 Class Rule, since they were developed after its entry into force   
Broken rudderblade of Oracle with the elevator
                                               Foiling The AC72 Class Rule and the 2 controversial points of the 37 points Safety Recommendations
Artemis II with the L-shaped "draggerboard" and the "elevator" on the rudder blade’s end
The AC72 Class Rule is a set of technical rules that determines the design parameters of the AC72 catamaran in a relatively wide range. The latest version was Published on 16 July 2012. When she came into force, the hydro- dynamically highly developed retractable draggerboards and the rudders were still "flat boards" only - with the functions to counteract the drift, or to steer the catamaran and to keep it stable. This AC72 Class Rule can be only changed by the Measurement Committee, with the approval of all teams. . After the fatal accident of the Artemis Racing catamaran on 9 in May 2013 Ian Murray, Regatta Director of the AC, organized a Safety Committe. Then he published Safety Recommendations with 2 key points.
1 point dealt with minimum sizes and shapeof the rudders and rudder elevators. The 2nd Punt provided for an increase in weight by 100 kg to 6000 kg. After their analysis of the accident and after consultation with the teams and the Coast Guard on he issued 22 May, a comprehensive 37 point paper, the "Safety Recommendations.  These were binding proposals to optimize the safety on board and around for the followingl Cup events. Iain Murray wanted to avoid in future that an AC72 can immerse with a bow and roll over due to too short rudder blades or inappropriate elevator surfaces. He generated heated debates and protests These proposals were interpreted as interference with the "AC72 Class Rule." For these changes  the Regatta Director was overstepping his competence. Responsible is the Measurement Committe with the required approval of all teams. While all the participants had accepted these points already before,  ETNZ and Luna Rossa had raised on these 2 points an appeal to the "International Jury" and got right. But as it was a formal decision only that the Measurement Committe is responsible, everything remained the same. Iain Murray with his 46 years of experience as a skipper, organizer and designer, a respected and integrity Cup veteran, was suddenly -- to his great annoyance - also alleged to have written these two points on pressure of Oracle 1982 they spoke of the attempts to throw  Australia II because its wing keel from the Cup, of a "Keelgate" (following President Nixon's Watergate). So now some journalists tried to speak of a "Ruddergate".
The first 4 AC72 catamarans
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