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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

    08.01.2024

    In contact.

    The Arkea Ultim Challenge - Brest has got off to a great start. Yesterday, at 12:30 UTC, the fleet of six giants treated us to a spectacular show to pay tribute to the large crowds both on land and at sea. After the first rather timid tack in Archimedean mode, the wind steadily picked up the further offshore the solo sailors got. These extra few kn…

    par Gitana

    The Arkea Ultim Challenge – Brest has got off to a great start. Yesterday, at 12:30 UTC, the fleet of six giants treated us to a spectacular show to pay tribute to the large crowds both on land and at sea. After the first rather timid tack in Archimedean mode, the wind steadily picked up the further offshore the solo sailors got. These extra few knots filling the sails enabled the Maxi Edmond de Rothschild and her rivals to really show off their potential in flight mode. Stood up on their foils, their hulls airborne, they set sail on their first single-handed round the world race: sublime! Since then, the initial moments at sea have been spent in close contact with the rest of the fleet. Already making headway abeam of Portugal this afternoon, after a little over 24 hours of racing, Charles Caudrelier is a few miles ahead, leading the way southward.
    A transatlantic pace for starters!   

    The Arkea Ultim Challenge – Brest set sail yesterday at 12:30 UTC from the north-west tip of Brittany and yet the fleet of ULTIMs was already passing the latitude of Porto this Monday afternoon. Everyone is in agreement that the start of this round the world race is more reminiscent of a transatlantic sprint than a long-haul sea passage around the planet. As such, for this first night at sea, the solo sailors were not hanging back, clearly keen to make an impression from the get-go. Despite some rather fluky conditions, which called for the sailors to spend many long hours at the helm, the giants lengthened their stride and devoured the Bay of Biscay at high speed. The Maxi Edmond de Rothschild was polled making more than 47 knots last night! With that, Charles Caudrelier took control of the fleet midway through the night and was first around Cape Finisterre in the early hours (shortly after 06:00 UTC).   

    These first few miles of racing are very much in close contact to the great delight of the observers and cartography addicts who typically shape the offshore racing landscape. At 16:00 hours, five of the six pretenders were bunched tightly together.   

    As predicted, what lies ahead is a slightly unconventional and demanding weather forecast. The big depression currently circulating in the North Atlantic has turned the usual configuration on its head and Charles Caudrelier and the other five solo sailors in the Arkea Ultim Challenge have been having to contend with a particularly random, dying breeze since midday.     

    Charles Caudrelier’s first words from the ocean   

    “The first night… was not really a night in fact, as I hardly slept. We had to do a lot of helming because the wind was very shifty, otherwise you couldn’t make headway. I’m in good shape. I managed to sleep in the early hours and eat well. Together with my routers, I think we sailed well during the first few hours of the race, but the situation remains complicated in terms of the weather. We don’t really know where the sweet spot is. We’re nicely positioned, but the wind is very, very random.   We’ve got off to a quick start! For a round the world race it’s not exactly the right pace for now. I slowed a fair bit in the early hours. I went to get some sleep as I saw that everyone was barrelling along at 40 knots. There’s no better way to break boats… all that to end up in the same light patch…”   

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