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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

    05.11.2010

    The longest day.

    Yann Guichard has been out of luck during this sixth day at sea. Since daybreak the skipper of Gitana Team has been battling with the calm conditions reigning this Friday under squalls generated by a tropical front. It’s an unexpected situation but one which has caused Gitana 11 to lose a lot of miles in relation to her three direct rivals. Indeed,…

    par Gitana

    Yann Guichard has been out of luck during this sixth day at sea. Since daybreak the skipper of Gitana Team has been battling with the calm conditions reigning this Friday under squalls generated by a tropical front. It’s an unexpected situation but one which has caused Gitana 11 to lose a lot of miles in relation to her three direct rivals. Indeed, all the others had already traversed this particular weather phenomenon and have been enjoying steady downwind conditions since the start of the day.

    The Atlantic certainly has a few surprises up its sleeve in this ninth Route du Rhum. With the top three making nearly twenty-five knots, just seven knots is the most Yann Guichard was able to make at the 1500 hour GMT ranking! The penalty is final with over one hundred and fifty miles lost to Francis Joyon in a matter of hours, despite still being ahead of him this morning… The cause is associated with a tricky passage through a front, beneath a line of squalls, which was blocking both the breeze and Gitana 11. However, midway through the afternoon, the situation, though still complicated, seemed to be improving and the solo sailor was slowly powering up again. However, Gitana isn’t out of the woods yet.
     
    A great deal of uncertainty in the West Indies
    “Midway through this Friday afternoon, Gitana 11 is still making headway beneath the stormy squalls of the front, which have really slowed her down over the past few hours. The wind is struggling to make a clear shift round to the NNE, whilst Francis Joyon passed through this barrier without mishap in the early hours. Yann Guichard should himself be clear of the zone in a few hours. The way out lies within ten miles, but any miles made to the West are hard to win as the wind is very light beneath the squalls… It’s slightly reminiscent of the Doldrums! Once through to the other side, the downwind breeze will kick in again, initially pumping out 10-15 knots, then 20-25 knots for the whole of tonight and all day on Saturday. Idec and Gitana 11 didn’t follow the same trajectory yesterday as each of them were hoping to best exploit the weather conditions in relation to the potential of their boats. For the next stage of the race, it’s possible that there may be a reshuffling of the cards as it’s forecast that the tradewinds will die out from Sunday evening across the whole of the Caribbean arc: light to virtually inexistent E’ly wind is due on zone. Further to that, the shifting of a tropical storm which is set to become Hurricane Tomas will add to the uncertainty of the final outcome. However, Franck Cammas’ considerable lead should mean he is less subject to the vagaries of this phenomenon” indicated Sylvain Mondon, Gitana 11’s router this Friday, from the offices of Météo France in Toulouse.
     
    From Saturday evening, leader Franck Cammas will have to deal with more erratic winds. After that it’ll be Thomas Coville’s turn to resolve the dilemma of the final trajectory: the zone of calms forming offshore of Pointe-à-Pitre won’t make things easy for anyone… This is especially true given that the Route du Rhum course calls for competitors to round to the West of the island of Guadeloupe and hence pass very close to the mountains of Basse-Terre, where the final mark before the finish is laid. The battle between the first four ‘ultimate’ trimarans isn’t over yet then, with the leader a little over 1,300 miles from the finish this evening.
     
    Ranking for the Ultimate Category on 5th November at 1500 hours GMT
    1- Groupama 3 some 1,338 miles from the finish
    2- Sodebo 260.6 miles from the leader
    3- Idec 309.4 miles astern
    4- Gitana 11 some 453 miles astern
    5- La Boite à Pizza 905.2 miles astern
    6- Défi Cancale 1,121.8 miles astern
    7- Saint-Malo 2015 some 1,158.1 miles astern
    Retirement- Côte d’Or II
    Retirement- Oman Air Majan