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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

    06.12.2008

    The Indian Ocean opens its doors.

    The leading Imoca monohulls made their entrance into the Indian Ocean this Saturday and are benefiting from a steady NW'ly air flow to continue their stampede. Positioned on the southern expressway and playing with the succession of lows, the leaders aren't easing off the pace and the speeds are just as high as ever. Indeed Gitana Eighty was making…

    par Gitana

    The leading Imoca monohulls made their entrance into the Indian Ocean this Saturday and are benefiting from a steady NW’ly air flow to continue their stampede. Positioned on the southern expressway and playing with the succession of lows, the leaders aren’t easing off the pace and the speeds are just as high as ever. Indeed Gitana Eighty was making 18.3 knots at 1600 hours. This speed over the course of an hour made the monohull the fastest of the ten leaders. At the afternoon ranking, Sébastien Josse confirmed his leader status by amassing a 25 mile lead over Yann Elies. Fourth, Loïck Peyron had a small 40 mile deficit.

    Questioned yesterday, Loïck Peyron knew his control of the fleet would only be short-lived. As such his third place in the first of the day’s rankings and his descent to fourth place at 1600 hours didn’t come as a disappointment to the skipper of Gitana Eighty, who commented on his positioning in the leading group: “I’d opted to conserve a fairly N’y position, which enabled me to delay my passage into the zone of high pressure, which swept across and slowed the fleet to my south yesterday. I was the last to enter this zone of light winds yesterday evening. After that, I had to reposition myself over my little playmates by bending my course to the SE. This constant jockeying for position amongst the leaders spices things up a bit!”

    On the race zone, whilst the 60 footers are belting along towards the second ice gate – the so called Kerguelen – the fleet are expanding outwards laterally. In 10th position, Armel Le Cléac’h is the furthest north of the group at 43°49 south. At the opposite end, nearly 200 miles further south, Jean-Pierre Dick remains the most extreme. Passing by 46°54 south, not far from the first ice pinpointed by satellite, the skipper of Gitana Eighty’s sistership seems to be reaping the benefits of his option. Indeed, at the latest position report, he’d made it back into the top trio to the detriment of Loïck Peyron: “I’m quite interested in the southerners. I find their trajectory interesting as they’re going to benefit from a better angle as well as more pressure (more wind) to reach the gate” admitted the skipper of Gitana Eighty. It’s also worth noting that Michel Desjoyeaux, who had to return to Les Sables d’Olonne a few hours after the start and had a 600 mile deficit on the fleet when he set out again, is now positioned in 9th place, 89.5 miles from the leader. It’s an incredible comeback which Loïck Peyron salutes: “Mich’ has not only had ideal conditions to make it back into the action like that, but he has also put in an amazing amount of work since his 2nd start!”

    In such a close planetary race, the speed differentials are paid for in cash. As such, the ranking is only reserving its front seats for those participants who are working close to 100 % of their capacity. Whether or not the sailors talk about it, at this stage and given the rhythm stamped by the solo sailors since leaving Les Sables d’Olonne some 27 days ago, nobody is protected and managing the gear is a constant concern: “As with all mechanical sports, you have to know how to manage the gear as one of the ingredients in finishing – and winning – is to have a boat which is in the best possible condition. Inevitably we all have our list of jobs though, especially as the majority of the parts on our prototypes come from the same suppliers. You have to try to minimise this list however” explained the sailor from La Baule.
    Among the technical issues, Loïck Peyron still hasn’t been able to re-reeve the gennaker halyard after it came apart at the masthead last Monday night, but it’s not through lack of trying: “I attempted a little climb of my mast yesterday in the calm spell. However the extensive cross seas and two broaches put paid to this… I climbed back down! I will have to make another attempt to carry out repairs in line with the weather forecast, but that won’t be for a couple of days” declared a calm and concentrated Loïck, as the wind dropped below 25 knots. This is doubtless a source of annoyance for the skipper, who is now accustomed to the windy conditions of the deep south. 

    Ranking on 6th December – 1600 hours (French time)
    1. BT (Sébastien Josse) 17,324 miles from the finish
    2. Generali (Yann Eliès) 25 miles from the leader
    3. Paprec Virbac (Jean-Pierre Dick) 40 miles
    4. Gitana Eighty (Loïck Peyron) 41.3 miles
    5. Veolia Environnement (Roland Jourdain) 53.3 miles
    (…)