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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

    13.05.2006

    The unbearable lightness of air.

    Weather forecasting is not an exact science, especially when it comes to predicting sailing conditions in the Mediterranean. The situation this Saturday morning illustrates this perfectly; with the two Gitanas stuck in patches of calm, as are the three leaders, who are now within reach. Patience is the order of the day, therefore, with no option bu…

    par Gitana

    Weather forecasting is not an exact science, especially when it comes to predicting sailing conditions in the Mediterranean. The situation this Saturday morning illustrates this perfectly; with the two Gitanas stuck in patches of calm, as are the three leaders, who are now within reach. Patience is the order of the day, therefore, with no option but to sit it out patiently on board.

    After periods of acceleration at over thirty knots, now come crawls of less than five knots! It’s enough to once again confirm the contrasts that characterise multihull sailing but also the significant difference between a relatively predictable Atlantic weather-wise and a generally hard-to-call Mediterranean. Consequently, the five leading trimarans are becalmed in light air, which is fortunately head to wind because even though the route is longer having to effect a series of gybes, at least the slightest gust is converted into progress: five knots upwind makes at least eight knots of speed, whereas five knots of stern wind barely generates three knots in velocity… That’s the law of apparent wind!
    With the finish 600 miles away, anything is still possible, especially as the gaps between the leading trio (Groupama 2, Banque Populaire IV and Géant) and the two Gitanas is still fairly limited, 25 miles in the case of 11 and 50 miles for her sister vessel. As an indication of how rapidly such leads can evaporate, the Gitana Team has clawed back 10 and 30 miles in 24 hours… Now they need to take advantage of every gust, changing tack as much as possible in the face of an unstable and variable breeze and tuning into the future to try to understand what the weather holds. The road to Nice is long and the paths for getting there fastest are far from marked out!

    Frédéric Le Peutrec onboard Gitana 11 at 08:30 this Saturday 13 May:

    “We’re at a standstill this morning. There’s no wind at all, not a sausage! And what’s more, the sea’s a bit choppy… It’s been dead like this for half an hour. Normally, we would have light air with headwinds as far as the Balearics and then gradually less and less breeze as we move up towards Nice! It’s going to be a long haul… At least until Tuesday afternoon. But everyone’s in the same boat, so to speak.  With these conditions, we go where we can: with so little wind, there’s no point trying any of our options and so for the moment, we’re forced to stay as close as possible to the direct route, like the others. This really is the side of the Mediterranean which I hate as we’ve no opportunities… We sailed well last night with a few brief flurries of wind and we’re not very far behind the leaders. It wasn’t too windy going through the Straits of Gibraltar, but we still had to sail with two reefs in the main and the staysail up along the Moroccan coast, where there was less sea and less current. We still changed tack nine times with up to 32 knots of wind, so it was good not to damage anything! The weather info indicates that we should be doing 20 knots but that’s not the case at all… What’s more, a weakening wind is forecast, and when it’s already zero, there can’t be a lot on the way… You can summon up the wind now, we’re ready! We need to get nearer to the coast to pick up the day’s thermals, but not overly so as there’s no wind at all close to the shores. In short then, it’s all a bit complicated. The routing has us changing tack twenty times between Ibiza and Majorca! So the picture’s really not clear at all and our options are limited at  the right moment. On the positive side, at least we can take it easy, but a very hot day is forecast. Basically, a Zen attitude is required…”