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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

    13.08.2013

    Edmond de Rothschild 10 miles from the finish.

    After setting out from Cowes at midday on Sunday, the MOD Edmond de Rothschild is set to complete the 600-mile course of the Rolex Fastnet Race this Tuesday morning. However, after a second bracing night, making headway downwind across the Celtic Sea, conditions are conspiring to hamper their progress as the sailors are having to negotiate a zone o…

    par Gitana

    After setting out from Cowes at midday on Sunday, the MOD Edmond de Rothschild is set to complete the 600-mile course of the Rolex Fastnet Race this Tuesday morning. However, after a second bracing night, making headway downwind across the Celtic Sea, conditions are conspiring to hamper their progress as the sailors are having to negotiate a zone of calm on the approach to Plymouth. At the 0830 GMT position report, Gitana XV was 9 miles from the finish, making just 2 knots of boat speed. As such Sébastien Josse and Charles Caudrelier are having to grin and bear it as they try to inch the one-design towards the finish line.

    Aboard the trimaran fitted out by Baron Benjamin de Rothschild, Yann Riou described the final hours of racing this morning:

    “A final night slipping along under gennaker. Initially, in a steady wind of around twenty knots, enabling high speeds to be racked up, then in an easing light breeze on the approach to Plymouth. As such it was a rather pleasant night for Sébastien and Charles, though they’ve had to battle against the sleep and fatigue accumulated during the initial twenty-four hours of racing. And it’s out of the question to lose focus… The reasons for this were initially due to sailing a multihull at high speeds, which doesn’t excuse the slightest discrepancy, and also because we crossed tacks with a few monohulls competing in the race and also making headway towards the Fastnet, not to mention the traffic and fishing around the Scilly Isles and offshore of Cornwall. Just a few miles from the finish, at daybreak, Edmond de Rothschild powers along at 18 knots on flat seas. On the helm, the fatigue is written on Sébastien’s face. The moment of the watch rotation arrives. Charles, a little more rested, puts in an appearance on deck. A short briefing ensues and Sébastien disappears into the cabin. A quick glimpse at the nav’, and into the bunk! Outside, Charles is busying himself with the trimming. The wind is gradually dying away: “It’s white up ahead!” And here we are, virtually at a standstill a dozen miles or so from the goal. Our navigation software, which was predicting an arrival in an hour’s time a while ago, is now displaying four hours… The last few miles may take a while yet.”

    Track proceedings at: http://fastnet.rorc.org/2013-fleet-tracking.html