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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

    23.11.2005

    Finishing line this evening.

    Gitana X is continuing to make headway in a tradewind which is unfortunately not as stable as had been expected. The result is that Thierry Duprey du Vorsent and Erwan Le Roux will not be reaching the finishing line before 23h00 UT, just after sundown in Brazil.

    par Gitana

    Gitana X is continuing to make headway in a tradewind which is unfortunately not as stable as had been expected. The result is that Thierry Duprey du Vorsent and Erwan Le Roux will not be reaching the finishing line before 23h00 UT, just after sundown in Brazil.

    Everything that could have come their way, did so! Gitana X has been through more than her fair share of misery since starting the race in Le Havre on 6th November. She will finally be reaching Salvador de Bahia around midnight French time, just as night falls in Brazil. Everything is fine on board but the easterly wind is not that lively. Less than 20 knots in fact and Thierry Duprey du Vorsent and Erwan Le Roux will certainly have to gybe one very last time to make it into All Saints’ Bay.  180 miles from Brazil at half past twelve today (French time) and making just under 16 knots, Gitana X still has to push her way through a small zone of very light air indeed. She still has to hang on for another 12 hours or so before finally being able to berth in Salvador de Bahia’s marina.

    Erwan Le Roux (Gitana X) :

    « We can smell the stable! We’ve still got to wait a bit as there’s no wind. Just 10-12 knots and squalls and big rotations in the wind. Trade winds are fine, but they are not always steady and with you all the way. In spite of what books might tell you ! We reckon we’ll be in about midnight (UT) or in the middle of the night at worst. There were 180 miles left (at 12h30 French time), at 15-17 knots, close to the direct route but we’re heading for four hours of calm. When the squalls pass overhead, you could be forgiven for thinking you were in Brittany. We’ll celebrate once we get in to Bahia even if we are tired. We really need to let off steam. The race was not easy-going. It’s great to be able to make it across the finishing line. Gitana X has been bought by some Brits so this is our last race on board. It’s a bit emotional. “Babouche“(Ed’s note – the boat’s nickname) certainly deserves a good party. »