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





























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,


























2014 Rolex Big Boat Series - Farr 40 Day 4 by William Wagner, San Francisco








2014 Rolex Big Boat Series - Impressive to sail out of the Golden Gate
Extreme Sailing Series - Istanbul delivers four days of great racing
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
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   
ISAF Sailing Worlds, Santander - Americans rise in Laser and Radial   
Extreme Sailing Series - A remarkable penultimate day’s racing + Video   
Marseille One Design - GC32 GDF Suez unstoppable in the light   
Rolex Swan Cup - Day 3 images by Carlo Borlenghi   
ISAF Sailing World Championships - Images of the leaders in Santander   
Rolex Big Boat Series - Good day for Double Trouble   
Rolex Big Boat Series - Day 2 images by Erik Simonson   
Royal Cup Marina Ibiza - TP52 fleet ready for tricky race tracks   
Rolex Big Boat Series - Plenty maintains lead   
2014 Asia Pacific Student Cup - Count down begins   
Extreme Sailing Series: Live coverage of Day 3 - view here   
Volvo Ocean Race 2014-15 - Going away   
Volvo Ocean Race 2014-15 - Practice makes perfect   
2014 J/70 World Championship - Contrasting conditions on Day 4   


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