sail-world.com
 
 
News Home Cruising Photo Gallery Video Gallery
Sail-World.com : America's Cup: AC72 a triple leap of faith - Luca Devoti
America's Cup: AC72 a triple leap of faith - Luca Devoti

'32nd Louis Vuitton Cup RR2. BMW Oracle Racing vs +39'    BMW Oracle Racing © Photo Gilles Martin-Raget    Click Here to view large photo

Luca Devoti has begun contributing to both Farevela.net and FareVela, Italy’s biggest sailing media.

The Italian Olympic sailor, silver medalist in the Finn in the Sydney 2000 Olympics, skipper of +39 in the 2007 America’s Cup, founder of the Devoti Sailing boatyard that builds Finn, Melges 24 and D-One, and current coach of the Italian Sailing Federation at the Finn class, will talk about various topics related to competitive sailing, fruit of his long experience and his wide network of international contacts at all levels. A well-informed person of the facts, as well as a careful observer of what is taking place in the sport of sailing.

In this first installment, Devoti gives a critical view on the current America’s Cup and, in particular, the AC72 yacht which he considers to be an example of the 'complete lack of practicality' that, in his opinion, marks the 34th America’s Cup. Devoti has first-hand experience on the issue, having been the Sports Director of Green Comm Racing, the now defunct challenger for the 34th America’s Cup:

The problem with the AC72 wings is mainly logistical, the ability to manage and handle a piece of equipment that weighs many kilos in order to make it operate in the best way possible within the complexity of configurations that will provide the aerodynamic advantages for the best performance. All teams have positioned themselves towards a three-element wing, with three modules and a central part, the same path the Little America’s Cup had already taken.

The difficulty lies in making it work and turn, by changing its shape while using the least energy possible. We must, therefore, understand how the wing works. In the AC45 the key lies in the use of the winch that is connected to the wing and serves as sheet and runner, making the windward hull fly at an ideal height, neither too low nor too high. This is in fact obtained, especially when the wind is unstable in intensity and direction, by continuously trimming the wing in and out. On the AC45 this is done with a load that is manageable by one person with a winch, although with great difficulty. We have seen that the ideal wing trimmer is a great sailor but is also in great physical condition, especially when the wind picks up.

The load on the AC72 wing, in this sense, will be much greater, I don’t want to be wrong but I think it will be around 1,500 kg, and will, therefore, involve different sizes and approaches. We must see whether we succeed. If you remember this was the problem of the challenge of the two monsters in 2010, that is the advantage of Oracle USA 17 over Alinghi 5. Alinghi struggled to stay high and with a certain angle, it was not a problem of quality of the helmsman as much as the difficulty with a conventional sail to keep this ideal setup.

The wing has therefore only a lateral load and still very low compared to the load on the sheet, and in a conventional sail when you ease or tense the sheet, it opens, twists more or closes. This type of work, especially when made with an engine, was perfect … one got there … and inside-outside, inside-outside you trimmed. On the other hand, with a conventional sail, even with the help of an engine, it was very difficult. Therefore, perhaps, we might see wing configurations that don’t seek maximum efficiency, but maximum ease of use.

Given the race course and the venue (the windy bay of San Francisco) a lot of unknowns open up in this project. The wing is so high and in San Francisco with 25 knots of wind and steep and short waves, its dimension becomes critical. It works in theory, when the boat is at speed, because the appendices that will go on the AC72 will not be linear but curved, they will not be at a fixed angle any more but move in and out and could also change the angle of attack. The balance, therefore, is given by the dynamic lift, given by the shape of the bows and the angle of the front foil, however it is clear that if, for any reason, there is no speed, the dynamic element will be missing and the possibility to pitchpole will increase exponentially.

For the rest of this story, in English, click here

For the full version including video, Click here


by Luca Devoti, Vsail.info

  

Click on the FB Like link to post this story to your FB wall

http://www.sail-world.com/index.cfm?nid=96679

3:06 AM Mon 30 Apr 2012GMT


Click here for printer friendly version
Click here to send us feedback or comments about this story.

Click for further information on
2013 America's Cup

Related News Stories:

29 Apr 2012  Emirates Team New Zealand on track for 2013 America's Cup
28 Apr 2012  America's Cup - San Francisco makes excitement evident
27 Apr 2012  America's Cup: AC72 regatta offered to New Zealand for summer of 2013
22 Apr 2012  America's Cup Uncovered: Episode 35- Racing gets underway after break
19 Apr 2012  America's Cup: Three teams to train in New Zealand in AC72's in 2013
19 Apr 2012  America's Cup - Oracle Racing heads to New Zealand
18 Apr 2012  America's Cup: Second challenger withdraws, leaves substantial debt
16 Apr 2012  America's Cup World Series: Full Video Replay of Finals Day in Naples
16 Apr 2012  Fisher's View: Day 5 Luna Rossa thrill their America's Cup home fans
16 Apr 2012  AC World Series Naples - Luna Rossa images by Carlo Borlenghi
MORE STORIES ...






News - USA and the World

40 year old Charles Caudrelier the skipper of race leader Dongfeng was a major figure of the winning French team Groupama in 2011-12 . With the Dongfeng team now approaching Sanya, almost unstoppable, its worthwhile hearing from Volvo Ocean Race CEO Knut Frostad who is hugely pleased with the current on water situation. ... [more]  

Volvo Ocean Race. The northerly drag race continues, with the stable light wind forecast to drop slightly. The boats have all remained in position, if anything cementing their places with gaps between them increasing slightly through the night. ... [more]  

Volvo Ocean Race Leg 3 - After what can only be described as a frustrating few days of wind and current conditions in the Malacca Strait, the shipping lanes we had to pass were a bit more entertaining as it was upwind which meant some tacking. ... [more]  

Quantum Key West Race Week provided the opportunity for the GC32s to make a spectacular debut in the USA. During the five days of racing held in balmy temperatures off the southernmost tip of Florida, crews experienced a range of conditions. ... [more]  

Volvo Ocean Race Leg 3 - Sailing in a straight line was never supposed to be as tense as this. We’ve been pointing at Sanya for almost a day now and fortunately, Alvimedica, MAPFRE, and Brunel far enough back to not be in AIS range anymore. The problem is they’re not in AIS range anymore. ... [more]  

Volvo Ocean Race: Leg 3 Finish - Live video feed by Richard Gladwell, Sail-World.com/nz
Tune in here to see the finish of Leg 3 of the Volvo Ocean race in Sanya. Will sailing history be made? Can Dongfeng become the first Chinese flagged yacht to win a Leg in a Round the World Race? ... [more]  

2015 ISAF Sailing World Cup Miami - Bigger than ever in 2015, with an atmosphere crackling with adrenaline, the ISAF Sailing World Cup Miami, Presented by Sunbrella, was ground zero on Sunday as competitors from 63 countries made their final preparations. ... [more]  

The Chinese entry Dong looks set to create sailing sailing history when she finishes first on Leg 3 of the Volvo Ocean Race, Sanya in two days time. Includes video Currently Dongfeng is 250 nm to the finish line in Sanya and the chasing pack with ADOR ahead in second place 55+ nm behind the Chinese team. ... [more]  

The first of the iconic Great Capes has been passed in the Barcelona World Race with Cheminées Poujoulat rounding the Cape of Good Hope earlier this morning. Bernard Stamm and Jean Le Cam passed 20°E around 400 miles south of Cape Agulhas – the southernmost tip of Africa – at 0935am (UTC) today and have begun the Indian Ocean leg of their race around Antarctica. ... [more]  

The Classic 18fters were racing again on Saturday on Sydney harbour. Michael Chittenden caught the action from a shore vantage point. ... [more]  

When race leader Dongfeng rounded Singapore 60+ nautical miles ahead of the chasing pack, it looked like the final 1200 miles of Leg three would be a procession but over the last day, the Volvo Ocean race leg from Abu Dhabi to Sanya China appears to have tightened incredibly. ... [more]  

US Sailing and Rolex USA announced last week that the 2014 Rolex Yachtswoman of the Year is Stephanie Roble. Her accomplishments on the water last year were recognized by the selection panel for her versatility; her accomplishments as a skipper and as a crew; and her competitive successes on a variety of platforms, sailing against both men and women. ... [more]  

Barcelona World Race - The first of the Great Capes is fast-approaching, with the leading boats in the Barcelona World Race expected to pass the longitude of the Cape of Good Hope at the tip of South Africa tomorrow. As they pass 20°E, the Atlantic Ocean will deliver its verdict – did Cheminées Poujoulat’s east-bound track or Neutrogena’s southerly gamble pay off? ... [more]  

Mardi Gras may not be for another month but US Sailing’s National Sailing Programs Symposium (NSPS) kicked it off early for Oakcliff Sailing this year. This evening, Oakcliff received The Captain Joe Prosser Award, given to an organization that has made an exemplary contribution toward improving the quality and safety in the training or instruction of sailors. ... [more]  

The 35th St. Maarten Heineken Regatta has already attracted entries from 20 different countries: Antigua, Austria, Belgium, Brazil, Canada, Dominican Republic, Estonia, France, Germany, Great Britain, Italy, Lithuania, Netherlands, Norway, Puerto Rico, Russia, St.Maarten, Uruguay, USA and the US Virgin Islands. ... [more]  

The world is watching. Can Dongfeng Race Team hold onto their 57 nautical miles lead to China for what will essentially be the ultimate home victory? Or will another team get desperate and make a bold decision that could cost Dongfeng their win? ... [more]  

Most of the marque classes at Quantum Key West Race Week 2015 came down to the last day of the regatta, which delivered the toughest conditions of the week. Howling winds and rough seas challenging the competitors on Friday, forcing the top contenders to raise their game in order to claim overall victory. ... [more]  

Barcelona World Race - Sport met science today on the Barcelona World Race when the pairs of skippers took the first opportunity to deploy their data monitoring Argo beacon which was given to them in Bareclona prior to the start. ... [more]  

2015 Quantum Key West Race Week - It really wasn’t our week. Two races were held today in very nice conditions and we finished third in both. Bella Mente won both races to win the class. ... [more]  

The Mount Gay Round Barbados Race Series, incorporating three days of coastal racing and the Mount Gay Rum Round Barbados Race concluded last night at a sumptuous, Mount Gay Rum-fuelled prizegiving dinner and party. The final 300-mile Ocean Race to Antigua to tie up with the Superyacht Cup starts on Saturday. ... [more]  

Photographer Ingrid Abery was on the water again today at 2015 Quantum Key West Race Week, and provided this gallery of images from day five ... [more]  

Volvo Ocean Race 2015 - With a solid 17-20 knots from the north east, reducing the possibility of a distance sapping park up, the likehood of the Leg three leader the Chinese boat Dongfeng getting the gun in Sanya just 640 nautical miles ahead continues to strengthen. ... [more]  

The 2015 ISAF Youth Match Racing World Championship set to be held in Swinoujscie, Poland from 15 – 19 September 2015 Notice of Race has been released. ... [more]  

Currently doing scheduled maintenance. Some elements of site may not be visible at the moment. ... [more]  

On 2nd January 2015, Team Vestas Wind announced that skipper Chris Nicholson had been tasked to review the team during the month of January. The objective is to ensure the right team for the come back to the race, which is now, for this team, of a different nature than the scheduled original route from Alicante to Gothenburg. ... [more]  

Beau Outteridge has compiled a video of highlights and interviews from the 2015 McDougall + McConanghy Moth Worlds completed recently in Sorrento, Melbourne ... [more]  

Former Oracle Team USA team member, Matthew Mitchell has issued a media release stating that he has lodged a complaint with the International Sailing Federation over the actions of a fellow crew member, Simeon Tienpont, and inaction by the International Jury for the 34th America's Cup, in San Francisco. ... [more]  

Photographer Ingrid Abery was on the water at 2015 Quantum Key West Race Week, and provided this gallery of images from day four. ... [more]  

2015 ISAF Sailing World Cup Miami - Along with the rest of the 848 sailors from 63 nations currently training in Florida ahead of ISAF Sailing World Cup Miami, Presented by Sunbrella (January 26-31), US Sailing Team Sperry Top-Sider athletes and coaches have entered a period of intense focus ahead of the first major Olympic and Paralympic event of 2015. ... [more]  

2015 Quantum Key West Race Week - It probably won't be a late night on Duval Street for the sailors competing on Division Two and Three at Quantum Key West Race Week 2015. After doing three races in strong winds on Thursday, there are no doubt a lot of sore muscles, aching bones and tired bodies. ... [more]  

Children’s heart health continues to benefit from Team Alvimedica’s online auction now underway for two unique experiences during the Volvo Ocean Race stopover here. The Chinese Agape Foundation Inc. will be the recipient of funds raised for these unique team experiences in Sanya, the next stopover port of the global ocean race. ... [more]  

Lauderdale Olympic Classes Regatta overall by John Payne, Fort Lauderdale
The Lauderdale Olympic Classes Regatta was held January 17-19 in the Atlantic Ocean off of Dania Beach in Ft. Lauderdale, FL. Open to Finns (it’s their Midwinter Championship), Lasers and Laser Radials, competitors came from twenty countries and Puerto Rico. They range in age from 14 to 79. ... [more]  

Volvo Ocean Race 2014-15 Leg 3 update from Dongfeng Race Team: All hands on deck as Chinese crew suffer damage to their boat as the tack line of an important sail (J1) broke suddenly sending the 132 m² sail shooting up the forestay in a matter of seconds. The team have managed to set up a temporary replacement but the reality is, this is a rude awakening of how far away the finish line is. ... [more]  

America's Cup: Italy to host first America's Cup World Series regatta
Breeze and Sunshine at Quantum Key West Race Week
Images of the Millennium Cup and Bay of Islands Sailing Week - Day 1:
2015 Mount Gay Rum Round Barbados Race – Three records broken
St.Maarten Heineken Regatta - Simplified logistics and fun themes
2015 Quantum Key West Race Week - Day 3 images by Ingrid Abery
Millennium Cup: Racing in the picturesque Bay of Islands
Volvo Ocean Race - Up up and away
Barcelona World Race - 'Haves' and 'Have Nots'
Volvo Ocean Race Leg 3 update from Jack Bouttell onboard Dongfeng
ISAF Sailing World Cup Miami - Game time!
Extreme Sailing Series™ 2015 – Ninth year ready to rock!
Foiling GC32s Key West Race Week images by Ingrid Abery
Mount Gay Rum Round Barbados Race - Crews prepare for big race
2015 Quantum Key West Race Week - Day 2
2015 Quantum Key West Race Week - A challenging day
America's Cup: Spithill leads Oracle reconnaissance team in Bermuda
Extreme Sailing Series announces new teams and venues for 2015
Barcelona World Race - Leaders enter the fastest section of the course
Martinique Surf Pro - Must attend event in the world surfing circuit
New York Yacht Club Invitational Cup preview   
RORC Caribbean 600 proving irresistible   
18ft Skiffs: Images from NSW Championships - Race 2   
Volvo Ocean Race – Malacca Nightmare – now it’s a boat race again!!   
2015 Annapolis to Newport Race - Battle for Surflant Prize   
2015 Quantum Key West Race Week - Off to a great start   
Volvo Ocean Race: Team Alvimedica - Enter the Dragon + Video   
Mount Gay Round Barbados Race Series - Day 3   
World Match Racing Tour's title sponsor goes into administration   
Kieler Woche 2015 promotes Olympic sailing competitions   
Trofeo S.A.R. Princesa Sofía – Kiteboarding and Dragons return   
ISAF Sailing World Cup Miami preview   
Audi Melges 20 Class - Miami Winter Series   
Barcelona World Race - The South is looming.   
Island Water World Grenada Sailing Week announce new one design class   
Volvo Ocean Race 2014-15 Leg 3 position report for 19th January   
Pape Chevrolet North American Championships - Register today!   
Volvo Ocean Race: Sally Barkow - from the Olympics to the Volvo   
Volvo Ocean Race Leg 3 - The big casino *Feature   
C&C 30 Javelin makes West Coast Debut   


For this week's complete news stories select    Last 7 Days
   Search All News
For last month's complete news stories select    Last 30 Days
   Archive News







Sail-World.com  


















Switch Default Region to:

Social Media

Asia

Australia

Canada

Europe

New Zealand

United Kingdom


http://www.sail-world.com/event_images/image/Twitter_logo_small.png http://www.sail-world.com/event_images/image/FaceBook-icon.png  http://www.sail-world.com/event_images/image/RSS-Icon.png

United States

Cruising Northern

Cruising Southern

MarineBusiness World

PowerBoat World

FishingBoating World

 

Contact

Commercial

News

Search

Contact Us

Advertisers Information

Submit news/events

Search Stories/Text

Feedback

Advertisers Directory

Newsletter Archive

Photo Gallery

 

Banner Advertising Details

Newsletter Subscribe

Video Gallery

Policies

 

 

 

Privacy Policy

 

 


Cookie Policy

 

 



This site and its contents are © Copyright TetraMedia and/or the original author, photographer etc. All Rights Reserved.  Photographs are copyright by law.  If you wish to use or buy a photograph contact the photographer directly.
XLXL NEW US
LocalAds   DE  ES  FR  IT