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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

    12.05.2005

    A new tempo.

    Four days into the race and the IB Group Challenge has changed pace yet again. After a tough run downwind in the Bay of Biscay, a lively beat upwind in the Atlantic, medium range downwind run, last night the wind was conspicuous by its lack of spirit. Up went the gennakers whilst waiting for the wind to offer the chance to get some close-hauled sai…

    par Gitana

    Four days into the race and the IB Group Challenge has changed pace yet again. After a tough run downwind in the Bay of Biscay, a lively beat upwind in the Atlantic, medium range downwind run, last night the wind was conspicuous by its lack of spirit. Up went the gennakers whilst waiting for the wind to offer the chance to get some close-hauled sailing done !

    The Big Blue has the reputation for being capricious. Sailors never find themselves in the same type of conditions throughout any one day. That’s just the way the Mediterranean is – a trying context for sailors. To start with, the six-strong fleet raced wind abeam in a light SE breeze as they approached the western part of this closed sea before the breeze veered east on a level with Algiers. Another major wind shift to be expected this afternoon. Perhaps a second chance for Gitana 11 who had trouble with her rudder last night. 
    « We were out of action for three hours. We lift the central rudder as soon as there is the slightest puff of wind so that we can control the boat correctly but it was not fully deployed. There were moments of calm during which we have to be able to continue making progress, which requires us to have the rudder spade in the water. I don’t really know quite what happened, but the hooking line (the system which holds the spade in place)got stuck between the spade and the cap. We couldn’t get it free.
    It was impossible to helm the boat, too weatherly, unsteerable. We finally got going once again at 07h00 in an 8-knot SW and are making good progress. Hard though as we have lost a lot of ground with all this mess… », Yann Guichard on Gitana 11 this morning.

    The wind is likely to remain abeam throughout the day and the trick is to gybe at the right moment to exploit wind shifts to the full. « We put a bit more north in our heading overnight as the wind tends to come in from the open sea first of all. We were well positioned, managing to keep Groupama-2 even overtaking her before nightfall. Our speed is not ridiculous. We are a little tired as a result of this, but everything’s okay. »

    At the 4h00 check-in point, Gitana 11 was still in the leading pack in company of the four other trimarans as Gitana X had managed to gnaw back a little of the ground lost overnight. But never the less, this unscheduled pitstop did cause Frédéric Le Peutrec to slip down the rankings compared at midday. The wind increased steadily with the sun at its highest before finally weakening at the end of the afternoon and veering east. This radical change will be very important to negotiate as its means that not only will the fleet be battling for first place to latch onto the wind, but get into position to prepare for the strait of Sicily. In any event, by this morning, the fleet had half the course of the IB Group Challenge in the rear-view mirror, 1,300 miles covered in three and a half days.

    Rankings – Thursday 12th May at 04h00 (French time) :

    1- Géant (Michel Desjoyeaux) 1 299.8 miles to the finish
    2- Groupama-2 (Franck Cammas) + 4.4 miles from the leader
    3- Banque Populaire (Pascal Bidégorry)  + 10.1 miles from the leader
    4- Gitana 11 (Frédéric Le Peutrec) + 11.5 miles from the leader
    5- Foncia (Armel Le Cléac’h) + 13.3 miles from the leader
    6- Gitana X (Thierry Duprey du Vorsent) + 57.4 miles from the leader