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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

    22.11.2002

    Shore Team. Guardian Angels..

    You'll see them running around the boat, taking care of the last few details, then escorting the trimaran out of the harbour aboard their tender. You'll find them at the yard in wintertime, imagining new solutions, optimising the machine. They're Gitana X's close guard, the men who take care of the ship, making sure nothing is missing. "Juju", also…

    par Gitana

    You’ll see them running around the boat, taking care of the last few details, then escorting the trimaran out of the harbour aboard their tender. You’ll find them at the yard in wintertime, imagining new solutions, optimising the machine. They’re Gitana X’s close guard, the men who take care of the ship, making sure nothing is missing. "Juju", also known as Patrick Jullien, tells us about the job he shares with Olivier Staub and "Napo" also know as Jean-Yves Le Govic, the three of them forming the shore assistance team.

    “It’s thrilling to work on that kind of boat : it’s the universe of prototypes, it’s exceptional”, says Juju. Organising, being ready at all times, taking care of logistics : these are the main preoccupations of the shore assistants when the boat is racing. “For the Route du Rhum, adds Juju, we unfortunately had just enough time to get all the gear into the truck and drive back to La Trinité-sur-Mer (Atlantic coast) when we learned that Lionel was coming back”. All the equipment had been cautiously put back into place, the tender was ready, its tank full of petrol, as usual. As soon as the assistance team arrived at the base, Lionel’s retrieval had to be planned for. “On a race like the Rhum, we know that if the skipper comes back home, he does so within the first 48 hours, because afterwards, the boat is already too far away. If a stopover has to be made, it’s generally in Spain, if not in the Azores. In this case, we would have been sent there… everyone has to be ready to leave. Our experience makes long lists and endless checks unnecessary, we all know precisely what we need to keep at hand”.
    Once the boat is back to her home port, the maintenance operations, the repairs or the optimisation sessions may begin. Because when Gitana X is not racing, she still requires a lot of attention ! “We’re permanently working on these machines, there’s always something to do, something to improve”.

    Skills and Versatility

    “In the Gitana Team, everyone is autonomous. And if there are specialists and specialities, we all get to work in various domains. That’s one of the interesting aspects of this job”. Juju like his job also because he feels he contributes to the whole adventure – even though he admits the boat spends more time at the yard than on the water. That’s the price to pay : “as soon as we’re sailing, we realise how extraordinary these boats are. We talk a lot with Lionel Lemonchois who, being the skipper, tells us what he wants and needs. Starting from there, we have to imagine solutions and put them into application… We go from conception to the finished product”. Because a boat – all the more when it’s as innovative as is Gitana X – in is perpetual evolution : work has to be done if the fields of performance, reliability, new parts have to be designed, not to mention all the “secret tricks” R&D… All teams have such secrets ! Yet, paranoia and over-protective behaviours (as can be seen in Formula 1 pit lanes, for example) are out of the question. Here, seamanship and the spirit of solidarity that sticks to it rule : “between teams, equipment is lent or borrowed on a daily basis, we never refuse to give a hand : when the Bayer trimaran came back home after having had auto-pilot problems, there was 45 knots of wind in the harbour entry. Napo jumped aboard the Gitana Team tender to offer his help”.

    About the Route du Rhum

    www.routedurhum.org
    www.france2.fr