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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

    10.11.2005

    The long route.

    Four days into the Transat Jacques Vabre and the fleet have found their feet, a cruising speed which is never the less pretty lively. The crews of the six ORMA trimarans still racing are starting to show signs of fatigue. Even off the coast of Portugal the fleet is facing NE winds of up to 30 knots and short choppy seas.

    par Gitana

    Four days into the Transat Jacques Vabre and the fleet have found their feet, a cruising speed which is never the less pretty lively. The crews of the six ORMA trimarans still racing are starting to show signs of fatigue. Even off the coast of Portugal the fleet is facing NE winds of up to 30 knots and short choppy seas.

    Not going into that much detail over the last few days, as the conditions have been rude and the crews have spent a fair bit of time playing at Mr Fixit. Both boats are truly getting into the swing of things. The pace has remained fast due as the wind has not really calmed since the fleet left the Channel. And although the wind has changed direction from head to following wind, both crews confirmed by radio this morning that the NE blow has never the less remained quite strong at around 25-30 knots.

    Frédéric Le Peutrec (Gitana 11) at 8h00:

     « We have the gennaker up and the main fully hoisted – and it’s warm out here ! Sea state is still quite choppy with squalls overhead and wind shifts at more than 30 knots. You have to stay at the helm if you are to steer a straight course. We are trying to put some west in our heading but it is probable that if conditions remain the same, we will have to sail through the Canary Islands. If that happens, we’ll aim for the passage between Tenerife and Gran Canaria which is further out in the open sea and less perturbed. We’re trying to catch up on lost sleep but conditions are not making that possible for the time being. But we are making progress ! Average boat speed is between 22 and 25 knots. The fact that our navigation unit is out of order is not doing us any good. It is impossible to determine wind force and direction with any precision. We’re sailing as people used to sail in the olden times and we have to be very careful not to get caught out, particularly at night. The moon is not that strong at the moment and the sky is only just beginning to clear. 

    Thierry Duprey du Vorsent (Gitana X):

    « We’re really out of it physically: we’ve spent the past couple of nights repairing, which drains energy. The first night we had to sort out our problems with the mainsail and the second night we had to work on the rudder to get us down to Porto.  Gitana technical team did a great job in the short space of two hours. We are speeding along now to make up for lost time ! Wind speed of around 25-30 knots with one reef in the main and Solent jib up front. The sea is very short and tonight speeds picked up to 30-35 knots in the squalls ! Forecasts are not expecting conditions to change over the next few hours. We’re going to have to establish a normal watch system so that we can rest a little. The last few days we’ve been kept busy helming or repairing … We’re going to see what’s happening up front but there’s a strong chance that we’ll pass east of the Canaries – we’re the closest to shore of the whole fleet. There’s not much choice in our track with this NE wind.  »

    For all the gaps with the new leader Banque Populaire are important, they are not final. Groupama-2 also had to make a pitstop – for five hours in Porto Santo (Madeira) to repair a part of their rudder and helm. Hugging the African coast should turn out to be the right option once past the Canary Islands. That leaves just 1 500 miles to go to the Doldrums – the trimarans will certainly have one or two gybes to do and in any event, the leaders will be the first to slow down when they run into the Inter-tropical convergence zone.

    Both crews of the Gitana Team will be able to freewheel down to the equator as conditions improve, giving them the chance to rest and get back into shape physically. There’s still a long way to go before they can hear the sound of the Brazilian samba ! 

    ORMA MULTIHULLS

    1 Banque Populaire
    2 Géant 
    3 Groupama 2 
    4 TIM Progetto Italia
    5 Gitana 11 
    6 Gitana X 3