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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

    01.11.2010

    Slipping southward.

    After a fabulous start and a smooth first section in terms of weather for rounding the Cap Fréhel mark in second position, Yann Guichard got into the thick of the action last night with a powerful NW’ly airflow and above all very difficult seas. The skipper of Gitana 11 opted to pass as close as possible to the island of Ushant, so as to dive down…

    par Gitana

    After a fabulous start and a smooth first section in terms of weather for rounding the Cap Fréhel mark in second position, Yann Guichard got into the thick of the action last night with a powerful NW’ly airflow and above all very difficult seas. The skipper of Gitana 11 opted to pass as close as possible to the island of Ushant, so as to dive down to the SW, towards Cape Finisterre, which he is likely to reach from Monday afternoon.

    The decision was taken well before the start with Sylvain Mondon, namely to round the tip of Brittany as quickly as possible so as to dive down towards Spain to slip under the Azores High, which is in the process of shifting across towards France. However, the solo sailors from the ‘ultimate’ class don’t all share the same view of the upcoming situation, with a depression passing to the North of the archipelago. Clearly Sidney Gavignet has opted for a route to the North of the high pressure, while the leader at noon, Thomas Coville, is holding onto a medium position, which could translate as a hesitation between the two courses, whilst Franck Cammas, Francis Joyon and Yann Guichard decided to sail along the Portuguese coast to hook onto the E’ly tradewinds.

    “I haven’t had much of a chance to rest since the start, between the manœuvres along the North coast of Brittany and the situation served up by the Bay of Biscay. The most annoying thing about the Bay isn’t the wind but the sea state. Last night the waves reached four metres and were very close together. In conditions such as these, I had no choice but to ease off the pace as, with each wave, Gitana 11 was flying up into the air and then ploughing into the next one. It’s a bit frustrating when you see the competitors ahead getting away… However, we’re not even 24 hours into the race yet: you have to preserve the boat above all else. There’s still a long way to go to get to Pointe-à-Pitre! As regards positioning, I’m satisfied as we’re exactly where Sylvain Mondon and I decided to be prior to the start. As such things are going perfectly to schedule and in line with our initial plan” indicated Yann Guichard this Monday morning. Aboard the maxi-trimaran Idec, a 30 metre giant measuring 7 metres longer than Gitana 11, Francis Joyon, who was sailing quite close to Yann last night, also described seas which were difficult to negotiate: “we’re being accompanied by such a big swell that it’s hard to believe”.

    An improvement from this evening
    The separation this Monday afternoon between the leaders of the maxi-multihulls may seem considerable, but in part it is only the result of the lateral separation of around fifty miles between Sodeb’O and Gitana 11 and around thirty miles in relation to Groupama 3. Forced to ease off the pace, when the seas were big last night and through until this Monday lunchtime, the trimaran fitted out by Baron Benjamin de Rothschild could begin to sail at the same speed as her closest rival, at over 22 knots. Logically, the swell will smooth out as the fleet approaches Cape Finisterre, which will enable Yann Guichard to accelerate considerably. However, the skipper of the Gitana Team knows all too well that he mustn’t dally as the winds will die down off the Spanish headland tonight. Already, the speed differential is substantial between those favouring the North and the ‘Southerners’ who this lunchtime were indicating that there were no more than around ten knots of breeze, whilst the solo sailors closer to the Iberian coast still had over twenty knots of breeze.

    Ranking for the Ultimate Category on 1st November at 1200 hours
    1. Sodebo
    2. Oman Air Majan 29.8 miles astern
    3. Idec 55.3 miles
    4. Groupama 3 some 57.9 miles
    5. Gitana 11 some 74.6 miles
    6. La Boite à Pizza 124.6 miles
    7. Défi Cancale 159.2 miles
    8. Côte d’Or II some 161.6 miles
    9. Saint-Malo 2015 some 171 miles astern