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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

    05.11.2005

    In the running.

    24 hours before the trimaran fleet crosses the starting line of the 7th edition of the Transat Jacques Vabre, the Gitana Team crews describe the transitional period between preparation and race. The weather forecast is a bit grim, with two fronts, wind shift, squalls, strong wind, so lots of manœuvres. Crews will need to keep a careful watch out in…

    par Gitana

    24 hours before the trimaran fleet crosses the starting line of the 7th edition of the Transat Jacques Vabre, the Gitana Team crews describe the transitional period between preparation and race. The weather forecast is a bit grim, with two fronts, wind shift, squalls, strong wind, so lots of manœuvres. Crews will need to keep a careful watch out in the shipping lanes, and be on the ball to stay in the race. A thought for the monohull fleet which got off to a lively start at 15h00 today !

    Thierry Duprey du Vorsent, Frédéric Le Peutrec, Erwan Le Roux and Yann Guichard, the four members of the Gitana Team take stock a day before the starting shot is fired on this atypical transatlantic yacht race from Le Havre to Salvador de Bahia. The trimarans will be switching from the northern to southern hemisphere, including therefore the tricky passage through the Doldrums over the Equator. But before reaching warm waters and the erratic winds of the Intertropical Convergence Zone, the fleet has to make its way out of the English Channel and across the Bay of Biscay. Looks like competitors are in for a lively start to the first phase covering some 5 200 nautical miles – a highly important stretch from a tactical point of view. 

    « The first tricky bit is making sure you are on form in the early hours. You have to get in as much sleep as you can. It basically boils down to one or two hours a day for the first few days. We know we’ll be going flat out with the two fronts up ahead. One on Sunday afternoon and the second overnight from Monday to Tuesday. We’re going to have to pull out all the stops without pushing the machines to breaking point, manœuvre as and when necessary, without exploding. Exiting the Channel is always a bit tricky. You have to keep an eagle eye out for shipping, cargo vessels, fishing vessels… The main thing is avoiding being distanced. The difference between the leaders and the tail enders can quickly run to a hundred or so miles by the time we get to Lisbon. Afterwards, the trade winds tend to favour the leaders, the gap can increase still further. We’re all on a level pegging in rough seas and the alternating high winds and steady blow will be affecting the whole fleet until midday on Tuesday. 
    Shortly after the start, night will fall, the sky will be moonless. It’ll be cold, the sea rough and violent wind shifts, increasing in strength from time to time. That requires a high level of reactivity. Under-canvassed, the boat suffers, just as it does too if over-canvassed. We’re in for a dynamic start and we just have to get into the race from the word go. 
    Everything has to work on these boats as the slightest technical hitch can assume catastrophic proportions if you find yourself with no searoom (too close to land or shipping…). A lot happens in a short space of time (several wind rotations, two cold fronts to cope with, squalls and strengthening winds, manœuvres close to land). Those who can make a quick getaway will increase their advantage at the start. You have to head quite far out to sea for the transition between this lows pressure system buffering Cape Finisterre and the NW breeze to run down to Portugal and the trade winds. When conditions are easier, you recover more quickly from the inevitable fatigue of the first couple of days, increasing the gap from those further downfield. Those who make that fats getaway will be seriously advantaged for what follows. »