British wind power to drive Maersk container ship

Sep 03, 2026 Last reply: 1 month ago 44 Replies
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Shipping giant Maersk is testing a modern rotor sail from British firm Anemoi Marine Technologies in an effort to cut fuel consumption and greenhouse gas emissions.



Anemoi says Maersk will fit one of its rotor sail systems to an 8,700 TEU Lima-class container ship. TEU, or twenty-foot equivalent unit, is the standard measure of container-carrying capacity.



That makes the Lima-class vessels relative tiddlers in the container- shipping world. Rival MSC's Irina-class ships measure 400 m (1,312 feet) long and can carry 24,346 TEU.



Under the agreement, Anemoi will design and manufacture a rotor sail measuring 5 m (16 feet) in diameter and 35 m (115 feet) high. Promotional images identify the vessel as the Maersk Labrea.



Anemoi will provide the engineering and installation support needed to integrate the sail with the ship's existing systems. Installation is scheduled for mid-2027, after which it will be tested during regular voyages across the North and South Atlantic.



Rotor sails, also known as Flettner rotors, differ radically in appearance and operation from traditional sails. They use the Magnus effect, in which a spinning body moving through an airstream generates lift.



The rotor's surface moves with the airflow on one side and against it on the other, creating a pressure difference and a force perpendicular to the apparent wind. When that force has a component in the ship's direction of travel, it provides additional thrust and reduces the load on the engines.



A Maersk container ship has a rotor sail fitted to its forecastle deck. The rotor sail resembles a tall cylinder. Maersk ship with Anemoi rotor sail Anemoi claims that a ship equipped with three of its rotor sails achieved average net fuel and emissions savings of 9.1 percent during a year-long assessment, rising to 21 percent on some voyages.



"We're delighted to be working with Maersk on this pioneering project. It's a strong example of how collaboration can support the adoption of wind-assisted propulsion, and we look forward to carrying out the installation and working together as the project progresses," said CEO Clare Urmston.



Maersk head of fleet technology Ole Graa Jakobsen commented: "Wind- assisted propulsion is one of several promising maritime solutions with the potential to improve vessel efficiency and reduce emissions. It has already been tested in other parts of the shipping sector, and we see this pilot with Anemoi as a valuable opportunity to build practical experience and assess its relevance for our fleet and for container shipping more broadly."



The trial comes as the International Maritime Organization (IMO) pushes the shipping industry to reduce total annual greenhouse gas emissions by at least 20 percent from 2008 levels by 2030 and at least 70 percent by



2040, before reaching net zero by or around 2050

Was tried and abandoned years ago.. Gains were nor worth complexity and cost Nuclear ships are however another matter

Odd for a company the size of Maersk not to know that ?

Were you out when they called ?

They really should /not/ use that caption to the photo without the words "Artist's impression", or something like it to show that it is an artificially generated image. If the rest of the article is to be believed, the Maersk Labrea will not be fitted with that sail for around another year.

How do you know that Maersk didn’t know that?

Maersk are leading the drive for nuclear ships.

This is probably coming straight out of their 'greenwashing' budget.

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They are simply sailing ships with a motor drive. They don't work into the wind - only across the wind.

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"UK-based classification society and professional advisory service Lloyd's Register, Danish global shipping company AP Moller-Maersk, the USA's Port of Charleston and the UK's Port of Felixstowe are partnering to examine the security and safeguarding requirements for the theoretical trans-Atlantic deployment of nuclear-powered container ships...

”"The idea worked, but the propulsion force generated was less than the motor would have generated if it had been connected to a standard marine propeller."[1]”

Typical Green thoughtless idea, a bit like the German Greens shutting down nuclear electricity generation then having to fire up lignite (lignite, for heaven’s sake!) power stations just to keep the lights on.

As a youngster I read my Mothers set of children’s Encyclopaedias which she had kept,amongst articles featuring things like African Postmen carrying letters with a slitted stick there was one about the new experimental Rotor Ship developed in Germany that was going to advance things. My Mother is now 96 and not much has happened yet apart a few niche projects.

GH

Does it onlyy work with British wind?

Your selective quoting really doesn't tell the story. From the section in the wiki /you/ raised (

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) "Some sources claim that the ship had proved inefficient on these voyages, that the power consumed by spinning 15-metre tall drums was disproportionate to the propulsive effect when compared with conventional propellers.[12] "The idea worked, but the propulsion force generated was less than the motor would have generated if it had been connected to a standard marine propeller."[13]

That view stands in contrast to others that claim that due to the impressive performance, Buckau was put into service to carry bulk cargo across the North Atlantic and the Baltic sea. On 31 March 1926, Buckau, now renamed Baden-Baden sailed to New York via South America, the 6,200 nautical mile voyage across the Atlantic used only 12 tons of fuel oil, compared with 45 tons for a motor ship of the same size without rotors,[14] arriving in New York harbor on 9 May.[15]

The latter assessment seems to be more accurate, as the outcome of the Buckau experiment, resulted in the development of the next rotor ship, Barbara."

Things have improved since. See this section for what's been going on this century:

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. If the rotor hadn't worked, why build new ships using it?

This is about wind power, not nuclear fusion ....

The Bucky and the Barbara (see the photos in the reference, above), are what might be said to be ’all rotor and very little ship’, so it’s no particular surprise that they were apparently efficient. What they certainly weren’t were 100m-long fully-loaded container ships.

And then there’s the problem of, as always with anything to do with renewables, the most efficient deployment of the rotors requiring the wind to be abeam of the ship, so that the force generated points in the same direction as the ship’s travel. For how long would that happy state of affairs occur in a transatlantic or transpacific journey?

Come to that, this whole rotor subject seems to be devoid of any calculations such as wind speed vs force generated, energy consumption of the rotor motors, statistics of wind direction variability on long voyages, etc, and it’s redolent of the renewables believers that ”the wind is always blowing somewhere”, as if that alone was a sufficient condition for the optimal use of wind-powered devices.

The UK bible for the renewable religion now states the wind ALWAYS blows strongly in the North Sea and in Scotland :)

I had a disintegrating book called 'sailing ships through the ages' or something going from Greek triremes to a rotor ship

Wind power has been around 2500 years. It was crap them and its still crap now

Only works with green flatulence]

A far better thought out project is Heart Aviation's electric airliner, which first flew a few days ago.

Ok its limited to about 150 mile hops, and carries a small engine to charge the batteries in an emergency, but for short haul 'island hops' its way cheaper than a turboprop

If the rotor had worked, why did they never build another one back then?

-- Renewable energy: Expensive solutions that don't work to a problem that doesn't exist instituted by self legalising protection rackets that don't protect, masquerading as public servants who don't serve the public.

Well the routes generally taken by the clippers and trading ships were essentially to go South to Africa with the westerlies on the beam and then NW to the US with the NE trades on the beam.

A far slower coal powered tramp steamer used a great circle route and only needed a crew of half a dozen, not fifty. And arrived in a predictable time

As with all wind power, the fickleness of the wind made it not a commercial propsition

Well its GreenSlop with probably a touch of AI thrown in to gull the gullible

As with climate change, the whole narrative depends on assumptions that are never to be questioned, let alone have calculations done on them

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