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  • Gitana 18
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  • Retractable Y-shaped foils, adjustable in three dimensions

    Inspired by the appendages of the America's Cup foiling monohulls, these Y-shaped foils have a wingspan of over 5 metres. They are designed to generate powerful lift, increase power and offer a wide range of adjustments to optimise flight at every point of sail and in all conditions. Beyond their impressive size, these foils feature many unique innovations.

    Revolutionary U-shaped rudders

    These are probably the most visually striking innovations on the new Maxi Edmond de Rothschild. To fly high above rough seas while maintaining control, the team wanted very long rudders that would remain in contact with the water. The challenge is that longer rudders tend to flex under load, severely affecting steering and the efficiency of their lifting surfaces. A new geometry was needed to give these appendages maximum stiffness, resist cavitation and ultimately improve control of the boat and make better use of its power. The result is a set of U-shaped rudders over 4 metres long, a metre longer than those on Gitana 17. Their shape, reminiscent of a tripod or an inverted π, is only the visible part of what makes them so distinctive.

    A daggerboard optimised to stabilise the boat and limit cavitation

    With its wide span, the daggerboard resembles an aircraft tail assembly, with two adjustable flaps: one on the vertical section and the other on the horizontal section, the distinctive “manta-ray wing”. On Gitana 18, the innovation is to position this wing behind the vertical part of the appendage, rather than directly beneath it, to minimise flow disturbance and cavitation.

    Gitana 18’s daggerboard

    Rig: adjustable spreaders to control mainsail power while sailing

    Gitana 18’s mast is 1.50 metres taller than its predecessor’s. The boom is also shorter, creating a more slender sail plan. The major innovation is a set of spreaders that can be adjusted while sailing to bend the mast fore and aft. Actuated by hydraulic rams, these spreaders can pivot through 35 degrees to adjust the bend in the middle of the mast. This unprecedented system allows the sailor to control mainsail power: adding depth in light winds to take off sooner, or flattening the sail to reduce power at high speed or in strong winds. Adjusting the depth, and therefore the power, of the mainsail can also save a solo sailor time and energy by reducing the need for risky manoeuvres or headsail changes.

    Central hull:
    an integrated, structural coachroof

    The naval architects and Gitana design team wanted an exceptionally stiff, structurally robust platform. This applies both to the floats, which must withstand heavy loads from the foils and rudders, and to the central hull, which is subject to torsion. The enclosed coachroof is integrated into the hull and contributes to its structural strength. Inside, the cockpit brings all sail-handling controls together, with ergonomics shaped by many hours of design and development. The coachroof also stands out for the number and size of its windows. This configuration meets the visibility requirements of the Ultim class rules and gives sailors the best possible view to keep a visual watch.

    Gitana 18’s coachroof

    10.09.2008

    Due North.

    The maxi-catamaran in the colours of the LCF Rothschild Group is fully benefiting from the last traces of the SE'ly tradewind to rack up the miles. An average of 22 knots over the past 24 hours, flat seas and an increase in temperature mean that life has a taste of paradise aboard Gitana 13 today. Sailing this Wednesday morning at 5° south and 13°…

    par Gitana

    The maxi-catamaran in the colours of the LCF Rothschild Group is fully benefiting from the last traces of the SE’ly tradewind to rack up the miles. An average of 22 knots over the past 24 hours, flat seas and an increase in temperature mean that life has a taste of paradise aboard Gitana 13 today. Sailing this Wednesday morning at 5° south and 13° west, Lionel Lemonchois and his men are set to reach the equator tonight.

    On crossing the equator for the fourth time in its record campaign, Gitana 13 will switch across to the northern hemisphere during the course of tonight. And as Lionel Lemonchois and his nine man crew attack their 27th day at sea, 3,700 miles – or virtually the equivalent of a “Route du Rhum” – still separate Gitana 13 from London. However, even though the maxi-catamaran equipped by Baron Benjamin de Rothschild is currently benefiting from fairly quick downwind conditions, this will change over the coming days, as the onboard navigator explains: “On the approach to the equator, the wind will ease as it heads but we’ll make our entrance into the northern hemisphere with the help of a monsoon phenomenon which is presently well established along the African coast. This SW’ly air flow is set to accompany us as far as Senegal, though we can envisage some squalls and zones of rather light, shifty  winds… we’ll be traversing the Doldrums after all! On the other hand, the forecasts, which are being confirmed on a daily basis, are promising headwinds – from the NE – between Senegal and Europe. This will clearly necessitate a series of tacks! Though it’s still a little early to guarantee this data and establish strategies over this final stretch, one thing for sure is that the pace will slow.”

    Besides his meteorological knowledge, Dominic Vittet is also a fan of statistics. In this way, he is having a stab at the rather intriguing ETA (estimated time of arrival), but it is naturally uncertain given that they still have a way to go to reach London and there are a number of obstacles along their path: “I think we stand a chance of completing this record in 10 to 12 days time. I’ve relied on the statistics from our daily average speed during the Route de l’Or. Taking all that into account it may be considered that we cover 350 miles a day; a distance which may seem rather small but can very easily be explained.” Indeed, the weather phenomena move from east to west or the reverse of that when yachts participate in races or record attempts following these axes and accompanying the weather systems. However, for Gitana 13, it’s quite a different scenario, at least on the Tea Route. The maxi-catamaran is following a north-south and south-north trajectory, which is forcing it to traverse the phenomena rather than accompany them. The upshot of this is numerous substantial transition zones and constant changes in the conditions which considerably slow their progress and cause the average speeds to drop.
     
    Conditions outside have comprised stratus clouds which have blocked Gitana 13’s sky since they passed offshore of Namibia and these have thickened as the days go by, gradually transforming into cumulus: “We’re beginning to have a few breaks in the cloud and even got a glimpse of the moon last night, but globally it’s fairly grey all around us. This gloomy universe in which we’ve been making headway for several days is fairly surprising near the equator! We removed the 2nd fleece layer just 36 hours ago and the latter part of the night is still cold in our bunks. It’s very different form my past experiences sailing in these climes” details Pascal Blouin, one of the three watch leaders aboard and a newcomer to the Gitana Team. And Pascal knows what he’s talking about… This sailor has a wealth of experience on the giants of the seas and in round the world courses after having successively sailed aboard the maxi-catamarans Innovation Explorer and Cheyenne and the maxi-trimarans Geronimo and Groupama 3. In fact he was the boat-captain of the latter, from its launch to its aborted Jules Verne Trophy attempt last winter.

    According to the latest observations, the equator/ Doldrums zone should reveal itself to be fairly mild for Gitana 13, though it is still rather tricky to volunteer theories in these typically random latitudes. However, the North Atlantic is already forecast to be a rather delicate affair for Lionel Lemonchois’ men: “Anything is possible over this final section… It’s rather like a lucky dip, which we don’t yet know the contents of.” We’ve been warned!

    A few figures
    Gitana 13 left Hong Kong on Thursday 14th August at 07h55’32” (UT)
    Wednesday 10th September at 0745 UT, Gitana 13 was sailing at 04°51.23 S /13 °03.97 E

    Watch No1: Lionel Lemonchois (Skipper / watch leader / helmsman) / Olivier Wroczynski (trimmer /head of computers and power)  / David Boileau (Bowman /  head of deck fittings)

    Watch No.2: Ludovic Aglaor (watch leader / helmsman) / Laurent Mermod (trimmer) / Ronan Le Goff (Bowman)

    Watch No.3: Pascal Blouin (Watch leader / helmsman) / Ronan Guérin (trimmer) / Léopold Lucet (No.1, head of supplies and doctor)

    Outside the watch system: Dominic Vittet (navigator)