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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

    19.11.2005

    A long-winded finish.

    Whereas the three leaders seem to be riding the same road to the end, at the same speed and with the same strategy, there are still more than 450 miles to go before reaching Salvador de Bahia. But it is not over yet, as the trade winds are suddenly decreasing in strength.

    par Gitana

    Whereas the three leaders seem to be riding the same road to the end, at the same speed and with the same strategy, there are still more than 450 miles to go before reaching Salvador de Bahia. But it is not over yet, as the trade winds are suddenly decreasing in strength.

    ORMA trimaran fleet leaders are being squeezed yet again ! The SE trades have been steady over the past three days but are now in the process of becoming much weaker altogether. The previous 25 knots is turning into a feeble 15 knot flow. Wind direction is changing too, east, then north-east towards Saturday evening. Although this is unlikely to change the final order, the gaps between the boats are however likely to shorten. We could be in for a one-on-one style regatta. Up ahead the wind is decreasing seriously and so the speed difference between leader  Banque Populaire and closest rival Gitana 11 was just eight knots at midday today.  In Salvador de Bahia, the wind is likely to be lighter still, becoming nowhere near as steady, shifting and changing as clouds come in from the open sea , it is quite possible that the trimarans finish within a very short time of one another. Unforeseeable only two days ago !

    This new situation on the south Atlantic, does not play into Gitana X’s hands. Her Solent jib tore last night and Thierry Duprey du Vorsent and Erwan Le Roux are having a tough time in a weakening trade wind with shortened sail, a less efficient heading and with Ascension Island still 200 miles of as the crow flies. Bad luck for the pair who are now contenting themselves with the idea of having to circumvent the Saint Helena High, head to wind on Sunday morning. As there is less wind, the end of the course for Gitana X is going to be long-winded indeed. Frédéric Le Peutrec and Yann Guichard can put paid to any worries about lack of freeze-dried food on baord. They are now spurred on by the hope that they can gain ground on Banque Populaire. Gitana 11 is making good progress and have gained more than ten miles between each satellite position polling, every two hours ! As they are offset in terms of longitude, as they have to gybe to head for Bahia, they are still in with a chance of pulling something off before reaching All Saints’ Bay. 

    Yann Guichard (Gitana 11)

    « We have the mainsail and gennaker up and are making good speed. The sea is a bit choppy and not that easy to negotiate with this boat. Man and machine are pushed hard. We’ve still got 500 miles to go but everything’s fine on board. Géant is a little to our south. We’re going to have to gybe tonight or early tomorrow morning. Not too bad from where we are right now so long as we still have a bit of wind. Running a bit short on freeze-dried food, but not long to go now. It’s warm too and not easy to get to sleep.
    Up ahead, the wind should start to ease off and veer east. We’ll have to make sure we get our gybe right as that will determine our angle of attack for the home stretch into Bahia. It’s difficult to imagine that the situation could change between the top three tris, but they may find themselves squeezing together at the end. » 

    Thierry Duprey Du Vorsent (Gitana X)

    « It’s still windy here 16-18 knots, SE but the sae has finally clamed down a bit. So much the better as it was difficult ot sleep and prepare stuff to eat. We’re really hoping that the wind doesn’t drop of altogether as our Solent ripped in two yesterday. We’ve got the main up and the staysail. Difficult sailing close-hauled like that and we can’t sail fast. The approach to Ascension is going to be tricky. It may take quite some time. It’s 200 miles off and we should make it there by Sunday morning. After that we’ll be downwind but in light air as the trades tend to weaken then ! Everything is contriving against us so that we take a slow ride to Bahia. But we’ve still got a smile on our faces ! It’s obvious we’re not going to catch the others. But we’re still fighting hard – for the sporting spirit, the team, the Gitana Team and all those who have encouraged us. Not that easy though when no-one pushing from behind and no-one close enough aead. We’ve had to make two stops and since Dakar it’s perfectly obvious that we wouldn’t be able to catch the leaders. The wind always comes in upfront. They were not stopped in the Doldrums. Yet we were glued there for hours on end. We’re continuing in the racing spirit for other reasons, not to win. A nice competition upfront for the finish – and it’s not over yet !
    This is the first time, fingers crossed, that we’ll be finishing the Transat Jacques Vabre. A reconnaissance mission for the next time ! We took on supplies for a fortnight and we’re going to over run but as I don’t eat much anyway, one meal a day is enough. And we hardly touched a crumb in the first few days too. We’re not going to starve out here ! »