Sail of the century: Sweden to build world’s largest wind-powered ship

Cargo ship can cross Atlantic in 12 days with 90 per cent fewer emissions

The Oceanbird is propelled by five 80-metre 'wingsails'. Wallenius Marine

Sweden will usher in a new age of sail by designing a cargo ship powered mostly by wind.

The futuristic transatlantic car carrier was unveiled by shipbuilder Wallenius Marine as part of its vision for more sustainable shipping.

Named Oceanbird, among its striking features are the five telescopic "wing sails" that protrude from the ship's hull.

At 80 metres high and resembling the wings of a plane, the wings need to be this size to generate enough propulsion for the 35,000-tonne ship.

The sails are capable of rotating 360 degrees without touching each other and can retract to about 60 metres to avoid hitting bridges and help to control the speed.

Oceanbird is 200 metres long, 40m wide and can carry up to 7,000 cars.

Wallenius said it is capable of travelling at 10 knots (18.5kph) and can cross the Atlantic in about 12 days powered mostly by the wind.

The shipbuilder said it produces 90 per cent fewer carbon emissions than a conventional diesel-powered boat.

However, carbon efficiency comes at a price. A diesel-powered equivalent can travel at 17 knots and cross the Atlantic in seven days.

The Stockholm-based designers have successfully completed sea trials of a six-metre model.

If built, it will be the world's largest sailing vessel.

The group is aiming for a possible launch in 2024 if it receives orders next year.

Per Tunnell, Wallenius Marine’s chief operating officer, said: “Shipping is a central function in global trade and stands for about 90 per cent of all transported goods, but it also contributes to emissions. It is critical that shipping becomes sustainable.

"Our studies show that wind is the most interesting energy source for ocean transport and with the 80-metre high wing sails on Oceanbird, we are developing the ocean-going freighters of the future."

Fast facts

Reduction in emissions: 90 per cent

Cargo capacity: 7,000 cars

Height above water line: 105 metres

Estimated transatlantic crossing: 12 days

Size: Length 200 metres, width 40 metres