Please select your home edition
Edition
Cyclops 2020 - SmartlinkNano - LEADERBOARD

America's Cup- Hinged foils approved by Measurement Committee

by Richard Gladwell on 13 Sep 2012
Artemis Racing unloading in San Francisco with the daggerboard aperture visible below the mainbeam Sander van der Borch / Artemis Racing http://www.sandervanderborch.com

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.


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.'


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.






Vaikobi 2021 FlexForce - FOOTERRS Sailing 2021 - FOOTERZhik 2021 Season 2 FOOTER

Related Articles

Allen's Latest Product Features
The inboard end batten adjuster and flanged aluminium deck bush Our newest range of flanged aluminium deck bushes feature a wider surface area with two fixing holes, allowing for a simple installation which only requires two screws and no messy bonding agent or silicone.
Posted today at 8:00 am
2021 International Masters Regatta day 1
Alan Field comes out strong in San Diego It's no secret that the skippers invited to San Diego Yacht Club's International Masters Regatta (IMR) come with a decorated sailing resume and outstanding accomplishments on the water.
Posted today at 6:41 am
Marc Blees sets sights high at Rolex TP52 Worlds
Former top Finn and Star helm turned offshore racer assembles a crew Former top Dutch Finn and Star boat helm turned leading offshore racer, Code Zero's Marc Blees will field a team at next week's 10 boat Rolex TP52 World Championship in Palma, Mallorca.
Posted on 21 Oct
2021 Rolex Middle Sea Race preview
The Mediterranean's quintessential offshore race Rolex has supported this annual 606-nautical mile (975 kilometre) race and its organizers, the Royal Malta Yacht Club (RMYC), since 2002.
Posted on 21 Oct
Doyle Sails place 4th and 6th in 2021 Moth Worlds
Some of the biggest names in sailing choose Doyle Sails for the 2021 Moth Worlds in Italy The Doyle Sails Moth Team Riders descended on Lake Garda, Italy for the World Championships in August, with some of the biggest names choosing Doyle Sails. With great effort going into innovation and development in the last twelve months.
Posted on 21 Oct
2024 Vendée Globe Notice of Race published
Rules of participation are put in place three years before the start The SAEM Vendée, the organizing entity behind the Vendée Globe, has just published the Notice of Race which details the rules for competing in the 10th edition of the Vendée Globe.
Posted on 21 Oct
The Ocean Cleanup proves viability of technology
With trash collected from the Great Pacific Garbage Patch The Ocean Cleanup, the non-profit developing and scaling technologies to rid the oceans of plastic, announces proof of technology upon returning to Victoria Harbour with trash collected from the Great Pacific Garbage Patch.
Posted on 21 Oct
Ten places at eSailing Worlds Final decided
With final set to take place live on 6 November The nine-month season has come to an end, concluding with the eSailing World Championship PlayOffs which took place this weekend (1st - 4th October), and the eSailGP Grand Finale. The ten places at the Live Final have now been decided!
Posted on 21 Oct
A new hand on the tiller of Womens Sailing in NZ
2000 Olympic gold medallist Jenny Armstrong is now plotting the course of women's sailing in NZ 2000 Olympic gold medallist Jenny Armstrong is now plotting the course of women's sailing in New Zealand - and she's already leading by example, Suzanne McFadden discovers.
Posted on 21 Oct
The Australian 18 Footers League Academy
An exciting new concept to encourage and educate new recruits The Australian 18 Footers League has established an exciting new concept to encourage and educate new recruits, or recently recruited, young sailors to the high-speed world of 18ft Skiff racing.
Posted on 21 Oct