sail-world.com
 
 
News Home Cruising Photo Gallery Video Gallery
Sail-World.com : America's Cup: Hinged foils approved by Measurement Committee
America's Cup: Hinged foils approved by Measurement Committee

'Artemis Racing unloading in San Francisco with the daggerboard aperture visible below the mainbeam'    Sander van der Borch / Artemis Racing ©    Click Here to view large photo

While the sailing world is still coming to terms with the concept of seeing 72ft America's Cup catamarans charging at 30kts plus, while fully out of the water on foils, the design teams are several steps further down the path.

So far only one style of foil has been seen - an S-shaped dagger board with a tip at right angles to the main part of the board, however a new type of hinged foil has been approved.

New diagrams released in a public interpretation by the Measurement Committee for the 34th America's Cup, show that a second style of foil could be used - and would be legal under the class rules.

The new foil style is similar to that seen on the high performance French trimaran, l'Hydroptere which at one stage was the world speed record holder with a run of over 50kts.

But instead of being contained within the hull of the AC72, as with the daggerboards seen so far, the new board is external and is just attached to the hull by a bearing, and supported by an external strut.

When raised it comes completely clear of the water.

Hinged Hydrofoil, with external strut, in the raised position. The 7metre radius is the maximum permitted by the class rules -  Americas Cup Media   Click Here to view large photo

The overall concept is within the maximum 7 metre length permitted for daggerboards by the America's Cup Class Rule.

Two options were put to the Measurement Committee for interpretation, one shows an external support, the second shows an internal control on the daggerboard similar to a canting heel.

In the decision dated September 6, 2012 Nick Nicholson, Chairman of the Measurement Committee stated: 'Nothing in the AC72 Class Rule explicitly prohibits the daggerboard concept shown in Figures 1a and 1b, provided the constraints of Rule 9 (Daggerboards) are met and the daggerboard and its installation otherwise comply with the limits and requirements of the Class Rule.'

Hinged Hydrofoil, with external strut, in the lowered position. -  Americas Cup Media   Click Here to view large photo

In a second string to its decision the Committee stated the same phraseology in response to the second concept.

In the America's Cup, there has been a long standing practice where a team can submit an idea for interpretation as to its legality by the Measurement Committee or International Jury - even though the matter may be hypothetical. The reason for the practice is that it avoids later measurement protests, which at that stage are acrimonious and avoidable with this advance warning procedure.

Once the interpretations are usually made public so that other teams can see them, and can make their design decisions accordingly.

It is not known which team has lodged the interpretation request. Both the two sailing AC72's seen to date have through hull daggerboards. Although Artemis has not been sailing the aperture for the daggerboard can be seen in one of her hulls as she was unloaded in San Francisco. Whether that is an aperture for a push-through daggerboard, or a location for a hinged foil remains to be seen. She also has what appears to be a sanded piece of hull topside above the daggerboard aperture.

Hinged Hydrofoil, with internal control strut, in the raised position. The 7metre radius is the maximum permitted by the class rules -  Americas Cup Media   Click Here to view large photo

Hinged Hydrofoil, with internal control strut, in the lowered position. -  Americas Cup Media   Click Here to view large photo

l’Hydroptere with her hinged hydrofoils both deployed. in the AC34 only one daggerboard foil may be deployed at a time except while tacking or doings a mark rounding. -  Francis Demange   Click Here to view large photo

Close up of the hinged foil as used in l’Hydroptere. A different concept along the same theme using hinged daggerboards has been raised in the context of the 34th America’s Cup -  l'hydroptere.ch   Click Here to view large photo

Oracle Team USA dagger foil and rudder foil - on her first sail - August 31, 2012 San Francisco -     Click Here to view large photo

Emirates Team NZ AC72 sailing on the Hauraki Gulf, Auckland NZ September 6, 2012 -  Chris Cameron-ETNZ  


by Richard Gladwell

  

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

http://www.sail-world.com/index.cfm?nid=101999

8:57 AM Thu 13 Sep 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:

13 Sep 2012  America's Cup: Kiwis on Day 6 and counting
07 Sep 2012  America's Cup: Emirates Team NZ admits AC72 can foil sailing downwind
06 Sep 2012  America's Cup: Emirates Team NZ AC72 flies on Day 5 + Video
06 Sep 2012  Oracle Team USA's first day of testing ends in delay of several weeks
03 Sep 2012  America's Cup: Emirates Team NZ foiling on Waitemata Harbour - Images
01 Sep 2012  America's Cup: Oracle Team USA's AC 72 has first sail + Video
31 Aug 2012  America's Cup: Oracle Team USA is splashed in San Francisco + Video
30 Aug 2012  America's Cup: Volvo Champion signs with Italian Challenger
30 Aug 2012  America's Cup: Emirates Team NZ claims near 40kts in AC72 + Video
30 Aug 2012  America's Cup: Oracle fits wing but delays AC 72 launch
MORE STORIES ...






News - USA and the World







ISAF Sailing Worlds, Santander - Strong competition for RS:X fleets by Olga Maslivets, International RS:X Class Assoc.,
































470 Men and Women Worlds - Game on for Olympic Qualification by 470 International Association Class,












A complete recap of the most successful Melges 20 World Championship by International Audi Melges 20 Class Association,




ISAF Santander - Upwards path for Austrian women's 470 crew + video by Luissa Smith, International 470 Class Association,












ISAF Sailing World Championships - Day 4 images from Santander
ISAF Sailing Worlds, Santander: Emerging Nations Program sailors shine
ISAF Sailing Worlds, Santander - Teasing winds play havoc on day 4
ISAF Sailing World Championships: Hot conditions in Santander on day 4
Santander ISAF Sailing World Championships joins Bart’s Bash
PWA Cold Hawaii World Cup - Grounded fishing boat creates problems
Marseille One Design - GC32 Armin Strom Sailing Team emerge victorious
Rolex Big Boat Series 2014 - Ready for another 50 years
2014 Rolex Big Boat Series - Farr 40 Day 4
2014 Rolex Swan Cup - Eleventh-hour victories
Extreme Sailing Series - Kiwis clinch Act win in Istanbul + Video
2014 Rolex Big Boat Series - Two long races today for the J70 fleet
2014 Rolex Big Boat Series - Impressive to sail out of the Golden Gate
Extreme Sailing Series - Istanbul delivers four days of great racing
ISAF Sailing Worlds Santander - Day 3 images by Sail-World.com
Extreme Sailing Series: Emirates Team NZ bounces back for series win
Santander 2014 ISAF Worlds - Light winds and current test six classes
ISAF Sailing World Championships - Solid Day 3 for US Sailing Team
ISAF Sailing World Championships - Day 3 images by Jesus Renedo
Marseille One Design 2014 - GC32 Armin Strom blitzes final day
Volvo Ocean Race 2014-15 - Una Etapa 0 complicada para todos   
Santander 49ers: Olympic Gold Medallist says two into 90 does not go!! *Feature   
GBR aiming for first ever Nacra 17 Games berth at Santander Worlds   
Volvo Ocean Race: Man and sail overboard as Leg 0 serves up drama   
ISAF Sailing World Championships Santander 2014 – Images by Dan Ibsen   
Santander Worlds – already a spectator success   
ISAF Sailing World Championships Santander 2014 - Day 3 morning report   
Volvo Ocean Race 2014-15 - Tales from the extreme   
Volvo Ocean Race: Latest starter wins opening race   
2014 J/70 World Championship - Healy, Abdullah, Becker and Borges win   
2014 Rolex Big Boat Series - Full-blown, once again   
ISAF Worlds - Americans jump up Laser and Laser Radial leaderboard   
2014 Rolex Big Boat Series - Farr 40 Day 3   
ISAF Sailing World Championships - Day 2 images from Sail-World.com   
America's Cup: Luna Rossa sailing with two foiling AC45's + Video   
Extreme Sailing: Emirates Team NZ retain second overall   
ISAF Sailing Worlds, Santander - Rio Olympic Laser spots snapped up   
Rolex Swan Cup - All set for final showdown   
Upper Midwest sailors need help to take it to the next level   
ISAF Sailing World Championships - RS:X action begins in Santander   


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