sail-world.com
 
 
News Home Cruising Photo Gallery Video Gallery
Sail-World.com : l'Hydroptère DCNS - Jacques Vincent talks about the weather holdup
l'Hydroptère DCNS - Jacques Vincent talks about the weather holdup

'l’Hydroptère DCNS'    Francis Demange    Click Here to view large photo

For the past few weeks, l’Hydroptère DCNS has been on stand-by in Los Angeles, California. The crew is awaiting their first favourable weather window to set sail for Honolulu. The flying trimaran is set for take-off and all eyes are on the wind gods now. A fitting moment for a round-up of the situation with Jacques Vincent, co-skipper of the boat, as the crew anticipate a key element in a record attempt: the weather.

What is the main weather parameter that will trigger the start procedure?

'We’re targeting a phase when the North Pacific High is in the perfect position so we’re keeping an eye on how this zone is evolving. Ideally, the zone of high pressure has to be further North and slightly across to the East or West if possible. That would enable us to be as close to the direct course to Honolulu as possible and provide us with some good gybing angles for approaching the islands. From such scenarios, we’d prefer for the zone of high pressure to be set slightly over to the West. That would ensure we have lighter winds along the Californian coast and hence a more moderate sea state along the first quarter of the crossing.'

What kind of weather pattern are you expecting for the crossing attempt?


'On the big day we’ll leave port at around lunchtime. The wind will be light, but we know that a thermal breeze is likely to pick up at around 1400 hours. If things pan out as they should, this will be sufficiently strong to get us away from the coast and efficiently negotiate Catalina Island, which will be our first obstacle. Offshore of Catalina, we’ll hook onto a north-westerly air flow, along the eastern limit of the North Pacific High.

The further away from California we get, the more the north-westerly winds will veer, switching round to the North and then the North-East. Midway along the course, the wind will ease a little as it clocks round to the East, which will call for us to put in a tack that will set us slightly higher and to the North of the direct course. Three-quarters of the way along, we’ll need to plan for a gybe, which will distance us from the centre of the anticyclone and its associated overly light winds, at which point we’ll set a course to the South-West and the islands.

During this section of the course, the wind will continue to veer, enabling us to make for our destination on a direct course. As we approach Hawaii, the wind will funnel between the islands and the resulting increase in wind strength will cause the seas to build. That will doubtless be the trickiest element of the crossing, with the famous 'Moloka?i Channel', at the end of which lies the finish line.'


Do you have a general idea of the speeds over each of these portions of the course?

'Between the start and Catalina Island, we’ll be sailing upwind at around 18 knots I think and we may have to put in a tack to get around it. After Catalina, we should be able to make headway at an average of 25 knots. Some 150 miles from Los Angeles, we’ll more likely be making about 30 - 35 knots. To finish off, as the wind veers, we’ll switch to a downwind point of sail, which should see us making 25-30 knots of boat speed again.'

How would you weigh up the impact of the choice of weather window on the chances of success in your record attempt?

'It’s crucial! It’s the weather which enables you to exploit the boat’s potential.'

l’Hydroptère DCNS -  © T.Lesage/l'Hydroptère DCNS .   Click Here to view large photo

What kind of plan does the team have in place for surveying the weather and how are you organising yourselves?

'Among the crew, Yves Parlier and I are on permanent weather watch. Alain, Jean and Luc are also running the routing software and passing on their comments to us at regular intervals.

For the time being, during the stand-by period, the weather watch has focused largely on some fairly in-depth calculation models. We’re constantly running the routing and the minute the results begin to resemble the record reference time, we study the departure possibilities in greater detail.

During the stand-by phase, we’re being supported by Christian Dumard, (Great Circle/TVSailing News), a professional router. Over the record period, he’ll also be keeping a watch, directly linked to l’Hydroptère DCNS.

From a more technical viewpoint, with regards the computing element, we’re running the boat’s polars* on the American (GFS) and European (CEP) models. For the start zone we’re using the COAMPS files provided by Saildoc. When the two models converge on the same departure period there’s a strong chance that it will be a good weather window. '

*polars: theoretical speeds of a yacht according to a given angle and wind strength.

Why have you chosen this timeframe to come to California?

'The ideal timeframe begins in mid-June, continues through July and closes up again over the course of August/ early September. In summer, the anticyclone climbs North and the depressions become increasingly rare. These weather conditions enable you to take a more direct route towards Hawaii, without being disturbed by a northerly swell. A second favourable factor is the thermal breeze, which is highly active during this period. '

What have been the weather windows so far?

'We witnessed some very good weather windows over the first few days of July and since then there hasn’t been anything solid. It’s all down to the vagaries of the weather.'

And the upcoming weather windows?

'We haven’t lost hope. With a bit of luck, a weather window may present itself between now and the end of August. On our files, we can view the situation over a ten-day period. In any case, for now we’re fully focused on the routing and l’Hydroptère DCNS is ready for take-off.'


by Stéphanie André

  

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

http://www.sail-world.com/index.cfm?nid=100872

10:40 PM Fri 10 Aug 2012GMT


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







News - USA and the World

Express 27 National Championship overall + Video by Erik Simonson, Pressure-Drop.US,




















America's Cup: Louis Vuitton Cup's Yves Carcelle dies at 66 *Feature by Richard Gladwell/Sail-World.com/nz,












Audi Melges 20 World Championship - ‘Samba Pa Ti’ crowned champion by International Audi Melges 20 Class Association,










Audi Melges 20 World Championship - Final race to decide champion by International Audi Melges 20 Class Association,










Fort Lauderdale International Boat Show - 13 things to See and do by Fort Lauderdale International Boat Show,




Volvo Ocean Race: Update from Team Vestas Wind in images by Richard Gladwell/Sail-World.com/nz,








Audi Melges 20 World Championship - Classic Garda conditions on day 2 by International Audi Melges 20 Class Association,


PWA Alacati World Cup - Intense competition on day 3
America's Cup: 'The Doc' appointed as Commercial Commissioner
Wake Park Triple Crown - Registration open for final stop
Audi Melges 20 World Championship - Day 2 images by Stefano Gattini
Volvo Ocean Race - Two more join Dongfeng Race Team
OHPRI Teen Summer Camps make a splash
East to West: A profile of Volvo Ocean Race crew Team Dongfeng
Extreme Sailing Series - First-ever Turkish team to race in Istanbul
Audi Melges 20 World Championship - Race 4 images by Max Ranchi
New Around Britain and Ireland Monohull 40ft and less world record
Detroit Cup - Fifth place finish a difficult result for Neptune Racing
Audi Melges 20 World Championship - Alessandro Rombelli's 'STIG' leads
Volvo Ocean Race: Call of Duty comes first for Team Alvimedica
Audi Melges 20 World Championship - Day 1 images by Stefano Gattini
Helping boaters understand weather basics
PWA Alacati World Cup - Exciting finish on day 2
Match 40s find the surface again + Video
Audi Melges 20 World Championship - Day 1 images by Max Ranchi
Clagett Regatta names first Executive Director
Transatlantic Race - Fleet expanded for 2015 edition
IFDS World Championship overall   
Anna Tunnicliffe: Alinghi finishes second - Extreme Sailing Series   
2014 18' Skiff International Regatta - Day 2   
2014 Audi Melges 20 World Championship - It's go time in Garda   
2nd Annual Keith Dinsmoor Regatta September 13-14   
Aldo Alessio Regatta - Three days of tight racing   
PWA Alacati World Cup - First blood to Van Der Steen and Offringa   
Oakcliff Sailing hosts the Nacra 17, 49er and 49erFX Nationals + Video   
International 18ft Skiff Regatta underway on San Francisco Bay   
Maxi Yacht Rolex Cup 2014 - Quality fleet for Maxi Classic   
Sailing Champions League - which is Europe's best sailing club?   
Weta fun at the Wine & Roses Regatta   
Extreme Sailing Series: The Wave, Muscat claims victory on Cardiff Bay   
International 14 World Championships 2015: Not just for boys   
Rio de Janeiro achieves 50% treatment of sewage outflow *Feature   
2014 AWT Quatro Desert Showdown - Event memorable videos   
2014 18' Skiff Int Regatta: Day 1 at San Francisco - Reversal on beach   
Emirates Team NZ: Last race boost cannot save team from table bottom   
PWA Alacati World Cup - Furious slalom is upon us   
J/111 World Championships - The Winner is Shmokin Joe!   


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