Dongfang's 26 MW turbine is the world's largest offshore wind turbine. Its massive steel base will become an unplanned artificial reef, reshaping marine l
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Blades 502 feet long turn on the world’s biggest 26 MW turbine at a test base in Shandong, and the circle they sweep covers 829,000 square feet, about 14 American football fields
A crane lifted the last of three blades into place on a flat coastal site in Shandong province. The rotor it completed measures 1,017 feet across, which is wider than three football fields laid end to end. One full turn of it produces 62 kilowatt hours, which is roughly two days of power for an American home. Most of the numbers attached to this machine hold up well under checking. Two of the ones that travel furthest do not, and one of them is in almost every headline.
The dimensions that check out Each blade runs 502 feet from root to tip, and there are three of them on the hub. The circle they cut covers roughly 829,000 square feet, which works out at about 14 American football fields including the end zones. The widely repeated figure of ten and a half fields comes from converting with a soccer pitch instead, which is a third larger. At an average wind speed near 22 miles an hour the machine is rated to make 100 GWh in a year. That is enough for roughly 55,000 households, and it is an annual figure rather than a daily one, which is a distinction some coverage has lost. The platform itself is rated across a band from 20 up to 26 megawatts, so 26 is the ceiling and not the everyday output.
Where the machine actually stands This is the detail that keeps getting compressed out of the coverage. The 26 MW turbine is not offshore. It stands at a wind equipment testing and certification base at Dongying, on the Shandong coast, and the installation was announced at the start of September. The nacelle had rolled off a production line in Fuzhou, in Fujian province, the previous autumn. By early November it was being reported as operational, meaning it was turning under load and feeding a grid at a test site rather than sitting idle. A prototype at a certification base is a real milestone and it is not a wind farm. Commercial deployment at sea comes after the certification work, which is the same sequence every machine of this class goes through.
The height figure nobody can pin down Here is the point where the published specification sheets stop agreeing with each other. Trade coverage describes the machine as standing nearly 200 yards tall, and that number cannot be the tip height. With a rotor 1,017 feet across, the blade reaches roughly 508 feet above the hub, so a tip at 600 feet would put the other blade into the ground. The likeliest reading is that the published figure describes the tower or the hub, and that the translation lost track of which one. So the honest thing is to lead with the rotor, because that dimension is stated the same way everywhere. A number you can check beats a taller number that nobody can, and this one is impressive enough already.
What a foundation does to the seabed The reef argument attached to turbines like this one is not speculation, though the timing usually is. Drive steel into soft bottom and the surface fills, first with mussels and barnacles, then with the animals that come to eat them. At a five turbine site off Rhode Island, one foundation carried mussel beds up to 20 inches thick by the end of its third year in the water. The seabed community around that leg shifted from being run by worms to being co dominated by barnacles and mussels, as the survey of that site recorded. Mussel patches turned up as far as 160 feet from the leg, and the rock dumped around the base as scour protection adds more crevices again, as the installation report notes about the scale involved. The same effect turns up around any offshore array or fenced solar site, where the structure quietly becomes the habitat.
What nobody has measured yet No foundation carrying a machine this size has been through a full ecological cycle, because none is in the water. Bigger foundations mean more surface, more shadow and more turbulence down at depth, and not one of those scales in a simple straight line. Whether all that produces a genuinely richer reef or simply a larger one is an open question rather than a finding. The machine is also built for typhoons and for heavy salt corrosion, which tells you plainly enough where it is expected to end up. What can be said is that the rotor is real, the output figure is annual, and the reef is still hypothetical. Everything else being written about it is running some way ahead of a turbine that has not yet touched salt water.