sail-world.com
 
 
News Home Cruising Photo Gallery Video Gallery
Sail-World.com : America's Cup: Nick Holroyd on Emirates Team NZ's design gains + Video
America's Cup: Nick Holroyd on Emirates Team NZ's design gains + Video

'Richard Meacham (left), Nick Holroyd and Vito Vattuone have a designer discussion - Emirates Team NZ - Media Day January 17, 2012'    Richard Gladwell ©    Click Here to view large photo

'These boats have a long gestation', explains Nick Holroyd.

'The designs for the tooling up at Cookson Boats, were delivered after just four or five days sailing in Boat 1.'


'At that point we had confirmed foiling, and we were able to move the hull geometry into the more upwind speed, trim and performance areas.

'We also have a huge amount of load of data from Boat 1,' says the Emirates Team NZ Technical Director.

The design team have added weight in some areas and reduced it in others - all of which is focussed on achieving greater reliability as the program heads more into a regular race mode. Something which is relatively easy in a monohull, but much more difficult in the brave new world of the AC72.

'The third aspect for improvement is realising that we really have to be able to push hard is really critical to performance. Features which make the boat easier to sail, or push the boat harder when the conditions warrant it, have all been factored into this boat.'

Holroyd won't be drawn when questioned has to how much quicker Boat 2 will be than Boat 1. Obviously the team will have 'raced' them in the design computer. Instead he lists the areas they expect to see gains - improvements in the hulls. (Despite being open with the media, cameras were asked to be averted from the bow and stern areas - indicating that these are probably the areas that have been tweaked between design versions).



Next he points to the changes taking place next door in the wingsail shop - another area of expected improvement, and then there is the second generation of foils. Changes in systems, and the ways the crew are able to handle the boat are another point of improvement from Boat 1 to Boat 2.

'Across the board we are looking for improvement', is about as close as Holroyd gets to putting a number on the degree of gain.

Emirates Team New Zealand sailing at speed showing the beatifully twisted wingsail  Chris Cameron-ETNZ©   Click Here to view large photo
He's equally coy on the changes in the foils. Bigger or smaller? Another sidestep. 'Some dimensions shrink and others grow. Span always works, but structurally that is very very difficult to achieve.

'We're looking a more effective cross-over for the stability to be able to foil well, but achieve low drag to go upwind.'

Whether the Boat 2 will foil upwind is still a matter of conjecture. 'The VPPs (velocity prediction program, used for modelling relative design performance) suggest that might be possible, but I'm not so sure that's necessarily the fastest solution, yet. That's an open area for investigation, I guess.'

Downwind the emphasis is going on getting onto the foils quickly, and to begin foiling at lower wind-speeds. Achieving that goal is a matter of collaboration between the design and sailing teams. 'A lot of the discussions we have been having with Dean and the guys is how their technique works with the controls we have given them - and whether they need a finer control in some aspects or whether they need to be able to move things faster. All those things add up as well as the shape of the foils.' explains Holroyd.

'Control of the shape of the wingsail across the windrange, and being able to achieve twist profiles quickly and reliably are the main thrusts,' he says of this stage of the wingsail program.

Interestingly Holroyd says they can develop significantly more twist with a wingsail than they can with a softsail. 'you also have the ability with wingsails to move the Centre of Effort up and down the sail much more easily. That is the main benefit of them in this class. In over powered conditions you can continue top bring the centre of effort down

'We are also looking to change gears really quickly,and how the control systems in the wing allow you to do that. We are looking to be at close to optimum performance 100% of the time.'

While the design objective has been aimed at developing straight speed, as Emirates Team NZ moves into race mode they will also look at trading off some aspects of their boat to get an gain in other areas relative to their competitors. 'We trying to best optimise our chances against the other team's boat', says Holroyd.

Accuracy in the team's ability to hit their performance prediction numbers has been one of the hallmarks of the campaign to date. 'Dan Bernasconi (head of VPP) has a remarkable track record in this campaign in terms of performance prediction and going beyond that and being able to tell the sailing crew before launch what the settings should be for the expected wind range.'

'Every time we get to marry real world data back to what we find in our computer is a golden opportunity for us to improve our skills and ability to predict these things. that's been one of the things that has worked really well for us from early on in the campaign', he says in conclusion.


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=105701

11:14 AM Fri 18 Jan 2013GMT


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:

18 Jan 2013  America's Cup: Inside the AC72 hangar with Grant Dalton + Video
18 Jan 2013  America's Cup: The Wing is the Thing for Emirates Team NZ's next AC72
17 Jan 2013  America's Cup: Designer Mike Drummond looks at foiling and pitchpoling
15 Jan 2013  America's Cup: First look at Emirates Team NZ's second AC72 + Video
15 Jan 2013  America's Cup: Ex-Oracle design chief looks at the Class of 2013
13 Jan 2013  America's Cup Discovered: Episode 72 - Passion to Excel
11 Jan 2013  American Youth Sailing Force ready for battle at Youth America's Cup
11 Jan 2013  America's Cup: Emirates Team NZ and Luna Rossa '45ing + Video
10 Jan 2013  America's Cup: Luna Rossa skipper updates from Auckland
10 Jan 2013  America's Cup: Luna Rossa crew return to Auckland for final training
MORE STORIES ...






News - USA and the World



























Starboard Hatteras Wave Jam day 5 by American Windsurfing Tour,


















470 Men and Women Worlds - Champions decided in Santander by International 470 Class Association,






















Royal Cup Marina Ibiza - No racing on penultimate day
Belcher takes record fifth 470 World Championship
ISAF Sailing World Championships - Santander - Day 8 video highlights
2014 Great Lakes Team Racing Championship about to set off
2014 Etchells North American Championship - Day 1
2014 U.S. Multihull Championship - Day 1
2014 Chicago Match Cup - Repechage top four determined in final flight
J/24 World Championship - 35th anniversary preview
470 Men and Women Worlds - Santander medal race line-up confirmed
ISAF Sailing Worlds, Santander - Day 8 images by Sail-World.com
Royal Cup Marina Ibiza - Quantum Racing stumbles in coastal race
ISAF Sailing Worlds, Santander - Americans ready for 470 medal races
ISAF Sailing Worlds, Santander: Action ramps up with end zone in sight
Big Boat Series - It's not the size, it's the length
ISAF Sailing World Championships Santander - Double French RS:X gold
ISAF Sailing Worlds, Santander - Day 8 images by Sailing Energy
ISAF Sailing Worlds - Finn leaders emerge from shifty Santander breeze
ISAF Sailing Worlds, Santander - RS:X winner images by Barbara Sanchez
ISAF Sailing Worlds, Santander - Rio 2016 470 spots awarded
52 Super Series 2015 - Outlook looks hot for the 52 Super Series
Starboard Hatteras Wave Jam - Another early start on day 4   
ISAF Sailing World - First entry leaves sailor's reputation in tatters   
2014 Chicago Match Cup - Four go through to quarter finals   
470 Men and Women Worlds - Champs take over leaderboard   
ISAF Sailing World Champ - Buckingham finishes with career-best result   
America's Cup: Oracle's Larry Ellison to step down as CEO   
Classic Yacht Regatta - Sonny takes top classic prize   
ISAF Sailing Worlds, Santander - Buckingham finishes with career best   
ISAF Sailing Worlds, Santander - Rio 2016 RS:X spots claimed   
ISAF Sailing Worlds - Leaderboards shaping up in Santander + Video   
ISAF Sailing Worlds, Santander - Giles Scott continues to extend lead   
ISAF Sailing Worlds, Santander - Day 7 images by Sailing Energy   
ISAF Sailing Worlds - Laser and Radial winner images by Jesus Renedo   
ISAF Sailing Worlds, Santander - Medal Race images by Sail-World.com   
ISAF Sailing Worlds - Dutch dominate Laser and Radial in Santander   
Royal Cup Marina Ibiza - Quantum Racing more than doubles overall lead   
J/24 World Championship - Excitement builds for Newport racing   
Volvo Ocean Race - Seb Marsset joins Team Alvimedica   
Fall Seamanship training opportunities at New York Yacht Club   
Rolex Big Boat Series: More images from San Francisco - Final Day   


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