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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

    09.04.2008

    A few hours from the goal.

    The low has been true to form and the men aboard Gitana 13 have experienced one of the most lively days so far on this their tenth day at sea. They've had to deal with the most violent of winds, massive seas and impressive storms, racking up the miles no matter what was thrown at them; such was the setting off the coast of East Japan for Lionel Lem…

    par Gitana

    The low has been true to form and the men aboard Gitana 13 have experienced one of the most lively days so far on this their tenth day at sea. They’ve had to deal with the most violent of winds, massive seas and impressive storms, racking up the miles no matter what was thrown at them; such was the setting off the coast of East Japan for Lionel Lemonchois and his ten crew. 271 miles from Yokohama this morning and boosted by a lead of over 914 miles on the reference time, they should conclude their North Pacific crossing tonight (UT). In the meantime however, some difficult hours still lay ahead of the eleven sailors.

    “It’s a bit full on!” We’ve had it all: gusts at over 58 knots, storms accompanied by lightning and heavy with rain. Right now the wind has calmed down a little and we’ve only got 25 knots. We’re currently sailing under staysail with two reefs in the mainsail. We’re a little under-canvassed but the sea state is forcing us to sail in this configuration” explained Lionel Lemonchois yesterday evening prior to 2300 hours. Indeed, with average waves of 8 metres, reaching as high as 10 metres at times, the handling of the 33 metres maxi-catamaran has been acrobatic to say the least: “We’re surfing at 30 knots with virtually nothing aloft. It’s impressive and above all very demanding for the helmsmen. The past few hours have been stressful for everyone.” In these conditions, it is difficult, even impossible to get any sleep. Despite all this, the crew has remained in watch configuration; although given the vast amount of trimming to be done, the crew normally on standby were on deck with those on watch.

    Benefiting from their proximity to the depression centre, synonymous with light winds, the crew of Gitana 13 performed another gybe last night. Since then, the maxi-catamaran has switched to a heading of 290-270 ° to extract itself from the centre and hunt down the surrounding low. “They’re going to accompany the wind rotation, which will back from the south-east to the east and then the north-east, prior to fixing themselves in the north within the system. The seas won’t be so big but they will be shorter. Indeed, it is in this zone that the Kuro-Shivo reigns – a SE’ly current equivalent to the Gulf Stream along the East American seaboard” detailed Sylvain Mondon from Météo France.

    “We are on the home straight and there’s no way we can rush things. We making headway with care, trying to prevent too much pressure on the gear as much as we can” detailed the skipper of Gitana 13, remaining loyal to his philosophy. 

    Positioned 271 miles from the finish at 0930 hours, the maxi-catamaran in the colours of LCF Rothschild Group is expected into Yokohama overnight this Wednesday (UT). However, for Lionel Lemonchois and his ten crew, everything will depend on the negotiation of the final miles prior to Cape Nojima, which marks the entrance into Tokyo Bay. A 30 mile beat will then be the order of the day in order to make the finish line, situated at the far end of the bay off Yokohama (between the lighthouse at the entrance to Hakkeijima Marina and the white lighthouse to the south of the passage towards Hakkeijama, as stipulated in the WSSRC texts).