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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

    05.02.2008

    Esprit de corps.

    par Gitana

    Things obviously haven’t been particularly easy in recent days. We are a team, however, with a common goal: to go as fast as possible on the Route de l’Or. Since Saturday morning, it’s as if the clock has stopped—even though the stopwatch hasn’t. No one onboard mentions it, no one is counting the days lost, no one is twisting the knife in the wound, no one is complaining or moping around. During our forced inactivity, everyone’s little quirks could easily be blown out of proportion. But life on the boat is a long, peaceful river, with each person being extra careful about respecting the others onboard.

    The handymen are taking advantage of the down time to make little repairs. The old steering chains were showing signs of fatigue, so two new ones were made. A splice done here and there, a block and tackle made, straps resewn, hatches re-weatherproofed, the kitchen properly cleaned…we’ve been busy, but time has still crawled onward. So the books came out of the duffels, and conversations started flowing. Sure, we’ve sailed together before and crossed paths on the docks or at competitions like the Grand Prix des Multicoques, but we don’t really know each other all that well. So now we’re learning more about each other, telling about our lives and experiences—mainly sailing-related—and discovering many shared acquaintances. These conversations, among two, three or even more of us, simply wouldn’t have happened if we had been able to push on through without stopping. We’re making the most of the situation, and honestly, this misfortune within our broader challenge has only strengthened our sense of camaraderie.

    So patiently we await the return of Zephyr’s good graces to get back into action. A window may open Thursday morning. But we don’t want to obsess about it, we need to keep a little distance, confident that Lionel and Dominic will let us know when it’s time to get going.  It’s sort of like being on stand-by again, ready for the light to change to green. Except here we still need to manage the boat, with the watch system, sail trim, a route de follow… Our route today will be to the Strait of Magellan.. Why? For the sake of tourism. Don’t forget, we’re not just a bunch of rope-pullers. To boost morale even further, each crew member got a can of cassoulet tonight. Nothing hits the spot better when you get out of bed. Thanks Loïck (Peyron) for the cassoulet—Loïck never goes to sea without a few of these cans.

    Goodnight

    Nicolas Raynaud