This futuristic-looking windsail is the brainchild of Hugues De Turckheim and Philippe Marcovich...

The ACCWing is essentially a twin-skinned sail that can be raised or lowered. It’s fully battened, can be reefed, and can change its section shape using its own internal muscles, operated by compressed air. It achieves this with ‘muscles’ fitted at various positions up the sail on the inside of the wing. The muscles consist of a braided line around flexible hoses, one on each side of the wing. When the hose contracts on one side, it pulls the sail into shape, creating a deeper camber. Having muscles in different positions up along the sail means the section shape can change with height, allowing the twist to be controlled and developing a smooth transition from top to bottom. The rotation of the masts changes the sail’s angle of attack. When it comes to sheet loads, wingsails are often light. This is thanks to the sail’s balancing effect ahead of the mast, much like the equilibrium on a spade rudder. It’s easy to imagine how this system could be totally automated to respond to wind speed and direction, both in section shape and with automated reefing. While you might turn your nose up at letting a computer and servos take over the boat, there will surely be shipping companies that’ll sit up and take note. Since the clipper ships went out of fashion, there’s never been a need for them to put muscles and sails in the same sentence. Until now. ► Become a FREE SUBSCRIBER to Yachting World's YouTube page now - https://www.youtube.com/user/yachtingworld?sub_confirmation=1 ► For the latest reviews, new gear launches and tour news, visit our website: http://www.yachtingworld.com ► Like us on Facebook here - https://www.facebook.com/yachtingworldmagazine ► Follow us on Twitter at: https://twitter.com/yachtingworld ► Feel free to comment below! ► Remember to hit that LIKE button if you enjoyed it :)

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SOLAIA yacht is a 40m motor yacht, custom built-in 2001 by Hakvoort Shipyard with the last refit in 2016. Felix Buytendijk Yacht Design has designed both her interior and exterior. Attention has been paid to the quality of the furnishings on board and she has an impressive finish. Her interior sleeps up to 8 guests in 4 staterooms. SOLAIA features an elevator uniting the three decks, a large sky lounge, a hot tub and she is perfect for relaxing with friends and family. Her gym is equipped with the latest exercise equipment. She has a cruising speed of 12 knots, a maximum speed of 13 knots and a range of 4,200 NM, so style and performance combine beautifully. Enquire with Fraser to find out more about this yacht for sale: https://www.fraseryachts.com/en/yacht-for-sale/solaia/?utm_source=YouTube&utm_medium=referral Built/ Refit: 2001/2016 Builder: HAKVOORT Length: 40M/131'03" Beam: 8.6M (28'03") Draft: 2.7M (8'10") Gross Tonnage: 427 Hull: STEEL Stabilisers: UNDERWAY Engines: 2 X CATERPILLAR (720HP) Cruising/Max speed: 11/13 Knots Cruise Range: 4,200 NM Economical Range: 6,500 NM Exterior Design: FELIX BUYTENDIJK Interior Designer: FELIX BUYTENDIJK Classification: LLOYD'S REGISTER (LR) Configuration: Staterooms: 4 Guests: 8 Crew: 7

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Un de los retos más importantes (y difíciles) de la campaña "Velero Diosa Maat en Acción", era el cruce del mar de Alborán. Desde Almería, casi 100 millas de mar, mar, mar nos separaban de nuestro destino: Melilla. ¡Última parada de "El velero Diosa Maat en Acción"! En Melilla nos espera "Ecologistas en Acción-Guelaya", la federación de Ecologistas en Acción de la Ciudad. Como curiosidad nos dicen que Guelaya es una zona geográfica que abarca más que la ciudad de Melilla y se adentra en Marruecos. Y coincidimos con ellos: el ecologismo no entiende de fronteras. Durante la travesía nos organizamos en turnos de dos personas cada dos horas, para asegurar que siempre hubiese alguien en cubierta mirando al horizonte y vigilando cualquier novedad en la mar (como barcos grandes que se comen el velero).