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.

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.

25.09.2014

Edmond de Rothschild a month away from the Saint Malo meet!.

par Gitana

In just one month’s time, in line with the sailing instructions, which call for competitors to arrive in Saint Malo by 24 October at the latest, the Multi70 Edmond de Rothschild will be moored in Bassin Vauban. There the trimaran fitted out by Baron Benjamin de Rothschild will sit until 1 November, at which point she’ll leave the pontoons of the corsair city to spend a few hours lying at anchor prior to the race start on 2 November at 1400 hours. However, on this the 25 September, the day of the Route du Rhum press conference in Paris, the open ocean still seems a long way off for Sébastien Josse For the skipper of Edmond de Rothschild, the next few weeks promise to be intense, amidst an express check-up at her yard, further sailing time and media appointments, not to mention a sustained physical preparation.

Test run at the Azimut

On Friday at 1800 hours, five of the eight competitors registered in the ‘Ultimates’ class of the Route du Rhum – Destination Guadeloupe will set sail from Lorient for a 260-mile combat in race mode during the Défi Azimut. “Tomorrow, I’ll be at the start of the Défi Azimut for around 20 hours at sea in a very similar configuration to that of the Route du Rhum. I say very similar solely because we’re sailing in ‘mock solo’ format, with a passive crew aboard who is essentially there for safety reasons as we’ll be making headway close to the coast with the significant amount of shipping we’re familiar with in this sector,” explains the skipper of Edmond de Rothschild.Though the event format is a far cry from the exercise which awaits the solo sailors in the Route du Rhum, Sébastien Josse was keen to compete in this regatta to round off his race preparation: “On paper, this race has very little to do with the Route du Rhum, particularly given that the weather conditions are forecast to be light, but it remains an interesting prospect: crossing swords with your adversaries, preparing for a close-contact start in solo configuration and also racking up ever more miles and experiences. Four of my seven future rivals in the Rhum will be there. With this in mind and with a month to go until the off, this Défi Azimut will be a good little test run.”

Indeed, over the 260-mile course concocted by Jacques Caraës, Race Director of the Défi Azimut, Sébastien Josse and the Multi70 Edmond de Rothschild will get the opportunity to pit themselves against the 70-foot trimarans Oman Sail and Paprec Recyclage, as well as the 80-foot Prince de Bretagne and one of the firm favourites of the Route du Rhum, the maxi-trimaran Banque Populaire VII. Of note is that this boat now helmed by Loïck Peyron, following Armel Le Cléac’h’s withdrawal due to injury, is none other than the boat that won the 2010 edition of the race in the hands of Franck Cammas.

Express pit stop in Lorient

From Monday 29 September, the trimaran fitted out by Baron Benjamin de Rothschild will be lifted out of the water and moved into the discreet surroundings of the Gitana Team’s workshops for around ten days. There the team will give the platform a final thorough check-up (checking of the fittings, hydraulics and the hull below the waterline…). Whilst a great many of his adversaries favoured summer refits, Sébastien Josse opted to hold onto his steed for as long as possible so as to maximise his time on the water and the number of training sessions: “I wanted to rack up as much time on her as possible and feel entirely at ease with the boat before returning her to the yard, knowing that nothing structural would be done in any case. Given the high pressure conditions we’ve been experiencing since the start of September, I’m not dissatisfied that I scheduled in this later yard time just weeks before the start. This summer, I was able to make my qualification official in the steady wind and complete some 24 to 48-hour training sessions in bracing conditions. Today I feel calm and confident. Technically the boat matches our original criteria on every level, I validated the sports programme that I set myself and I can now focus on my physical preparation to ensure that I’m as honed as possible for the race start.”

The Multi70 Edmond de Rothschild is set to return to the liquid element around 10 October, a fortnight before her scheduled arrival at the foot of the ramparts in Saint Malo.

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