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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

    18.02.2008

    In shock.

    par Gitana

    Another tranquil night onboard Gitana 13, even though, for the first time in a long while, major dark squalls lie threateningly on the horizon. The equator is now only 220 miles ahead, so we should swallow it up today. The doldrums, lying 5° further north, will be challenging as expected unless they have the good sense to open their door to us as they did during our descent down the Atlantic. This past weekend, two or three jibes notwithstanding, life on the boat was too quiet as the trade winds continued to decline—sometimes to as low as 7 knots. Outcome: two days in which we covered less then 300 miles.

    But today, Monday morning, the crew of Gitana 13 is in shock. In his latest email, Météo France’s Richard Silvani, who has taken over briefly for Sylvain Mondon, informed us that Groupama 3 capsized after one of its floats broke open. We obviously know the Groupama crew really well; some of them, like Ronan Le Goff, regularly sail on Team Gitana. Like everyone else, we’re thankful for the happy ending to this perilous adventure. In retrospect, however, we shudder at the thought of this disaster taking place several days later…Groupama 3 would have been in the middle of nowhere, somewhere in the Pacific Ocean, far from help.

    Going after records is risky business. Groupama’s new trimaran was at the cutting edge of technology, and it performed amazingly well. Ocean adventures must and will continue forth, and we will add our humble stone to the mosaic. Lionel Lemonchois and his crew look forward to catching up very soon with the Groupama team on the rollicking seas of the big blue.

    Goodbye

    Nicolas Raynaud