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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

    25.11.2008

    “It’s heeling, slamming and wet!”.

    The weather situation in the southern Atlantic, which the leading solo sailors are unanimously describing as complicated and confused, has not yet let all its secrets out of the bag. However, with every satellite animation, a trend is being confirmed: at the tail end of November, the zone of high pressure has settled in for the duration and is like…

    par Gitana

    The weather situation in the southern Atlantic, which the leading solo sailors are unanimously describing as complicated and confused, has not yet let all its secrets out of the bag. However, with every satellite animation, a trend is being confirmed: at the tail end of November, the zone of high pressure has settled in for the duration and is likely to force the leaders to adopt a route taking them away from the shortest course, prior to starting to hang a big left towards the Cape of Good Hope and the Southern Seas. So today’s source of irritation stems from the fact that this scenario won’t necessarily be the same for all the protagonists in this Vendée Globe 2008-2009… At the head of the fleet the monohull equipped by Baron Benjamin de Rothschild is taking the knocks from a decidedly agitated sea and still has a slight cushion of a lead over his loyal adversary, Sébastien Josse’s 60 footer, at the 1600 hour ranking.

    “Last night, there were storm squalls everywhere… as a result of a small neighbouring cold front!” This situation has not prevented Loïck Peyron from getting the very most out of his steed though. Indeed, at today’s first ranking – that of 0500 hours -, the skipper of Gitana Eighty had again clawed back some precious miles from his closest rivals. Six hours later, it was another position report and another tone, since his pursuers, and Sébastien Josse in particular, had snatched back the miles they conceded overnight. In short, though the hierarchy remains virtually unchanged in the leading group, with the exception of the arrival of Brit Air in the top 3, the deficits shrink and stretch at the mercy of the courses they each choose. This isn’t really very surprising given that the conditions encountered seem to differ with just a few tens of miles of separation!

    At midday, the monohull in the colours of the LCF Rothschild Group was benefiting from a clearer horizon but was still suffering from cross seas, which the ship’s captain would willingly change: “The wind is still fluctuating just as much as before in terms of strength, but the squalls are gradually giving way to greyish skies. I haven’t got sunshine yet, far from it, but we may well be heading towards a clearer spell” explained Loïck Peyron, before describing the state of the “playing field”: “For the past 24 hours, the sea really hasn’t been very kind to us. On the nose and crossed… the seas are making life aboard complicated. You constantly have to hang on and watch every move you make in the boat. The current sea state isn’t as big or as powerful as that which we encountered in the Bay of Biscay during the storm of the first hours of racing, but it is considerably more unpleasant. It’s heeling, slamming and wet!”

    In these conditions, the 60 foot monohull becomes an immense resonance chamber, with a constant mix of the sounds of the hull slipping through the water and of the waves impacting; a noisy atmosphere in which the skipper of Gitana Eighty didn’t hide his difficulties in getting off to sleep: “The past 24 hours certainly haven’t inspired me to take any long siestas in my bunk. However, that’s not such a bad thing as the numerous shifts in the wind require my presence on deck, which would leave me little time to sleep anyway.”

    But why such a meteorological brain-teaser?

    The direct course, also known as the great circle route, would require the solo sailors to make a course of 120 (ESE), whilst currently the instruments are indicating values of between 167 and 191° (S). To make it simple, the weather is forcing the competitors leading the Vendée Globe 2008-2009 to fend off the Saint Helena High by going right around the outside. Positioned to the south of the ‘group of nine’ for the time being, the zone of high pressure is heading slowly eastwards. As such, those who might be tempted to get too much easting in their course might well get their fingers burnt in the high pressure of the phenomenon; a misfortune synonymous with light winds and long hours or even days becalmed. Faced with this situation, Loïck Peyron and his rivals have no choice but to drop due south as they wait for the opportunity to be able to hit the unsettled W’ly air flow from the lows of the southern hemisphere and are finally able to make headway to the east: “We have a real barrier in front of us! For the time being, we don’t have any choice. We’re all set for the big loop but you still have to keep a constant eye on the zone of high pressure and respond quickly should the latter end up being milder!” After 16 days of racing with daggers drawn, this sentence bears witness to the continued lucidity of Loïck Peyron, which will be paramount in negotiating this tricky section.

    Ranking on Tuesday 25th November – 1600 hours (French time)

    1. Gitana Eighty (Loïck Peyron) 20,263 miles from the finish
    2. BT (Sébastien Josse) 13 miles from the leader
    3. Brit Air (Armel Le Cléac’h) 43.7 miles
    4. Paprec Virbac (Jean-Pierre Dick) 45.7 miles
    5. PRB (Vincent Riou) 52.1 miles
    …