Standing 984 feet above a former coal mine in eastern Germany, one telescoping turbine now overtops every neighboring rotor and could double the electricity a single machine pulls from the same stretch of air
The last blade tip locked into place above Schipkau on a blustery Tuesday in early October, 984 feet above the ground of what was, not long ago, a lignite coal field.
No crane reached that height.
The inner tower simply rose through the outer one, jacked upward on steel cables like an extending antenna.
The process drew comparisons to telescoping an antenna, and the final lift required precise coordination: even moderate gusts delayed the last stage by several days.
Below, fifty conventional turbines already turned in the Brandenburg wind, their rotors spinning at the altitude this new machine calls its starting point.
The question the whole structure is built to answer is whether the air up there is different enough to change what a single rotor can earn from the sky.
Why the wind 300 meters up behaves like a different resource entirely
Wind does not blow the same at every height. Near the ground, turbulence from trees, buildings, ridges and even other turbines bleeds energy out of the airstream and forces gusts into irregular pulses that a generator handles less efficiently. Higher altitude air, above the reach of those surface obstacles, runs faster and steadier, which matters more than raw speed alone because a turbine produces its rated output most reliably when wind arrives at a consistent rate.
The physics compounds quickly. Wind power scales with the cube of wind speed, so a 10 percent gain in average speed translates to roughly a 33 percent gain in energy. Putting a rotor hub at 300 meters, where winds blow both faster and more evenly, captures that compounding effect across every hour of the year rather than just during peak gusts. That is the engineering logic behind the Schipkau machine: not a larger rotor, but the same rotor placed in a fundamentally better column of air.
So the developer argues the turbine could produce roughly twice the annual energy of a conventional machine sharing the same rotor diameter. That claim refers to energy over a full year, not to the machine’s rated power, which sits at 3.8 MW for this pilot installation.
The telescoping tower that no crane could have built
Schipkau’s turbine carries a second curiosity inside the first: the way it was assembled. At 1,197 feet, no conventional crane in routine service could have lifted the nacelle into position. The engineering team chose a different route entirely.
An open steel lattice structure was erected first, forming the outer skeleton of the tower. Inside that framework sat a slimmer inner mast, assembled at a lower elevation with the turbine and rotor already mounted on top. A strand-jack system, a set of hydraulic cable winches normally used to lift bridge sections and offshore platforms, then extended the inner mast upward through the outer lattice until the hub locked at 300 meters.
The process drew comparisons to telescoping an antenna, and the final lift required precise coordination: even moderate gusts delayed the last stage by several days. The decisive stage was completed when the inner section was extended upwards to its final position using a cable-lifting system, allowing the structure to reach great height without the use of cranes. The entire operation produced what is now Germany’s second-tallest structure, trailing only Berlin’s television tower by three meters.
A coal-mine field that became a two-tier wind farm
The turbine in Schipkau stands about 100 kilometers south of Berlin in a region once dominated by coal mining. Lignite extraction shaped this part of Brandenburg for generations, leaving behind subsided land, reshaped ridgelines and the industrial habit of thinking in vertical scale. Wind farms moved in as the mines closed, and today one of the 50 turbines in the Schipkau wind farm is the 365-meter structure expected to supply electricity to 7,500 households over a full year.
The developers envision adding these taller turbines as a “second tier,” with their rotors operating above those of conventional turbines, and their current assessment suggests Germany’s existing wind farms could potentially accommodate up to 4,000 high-altitude turbines, adding generation without developing new wind farm areas. That would mean reaching deeper into the sky above land already permitted and already connected to the grid, sidestepping two of the hardest bottlenecks in European wind expansion.
In the long term, the Schipkau site is to be developed into a hybrid power plant, with two levels of wind power and a solar park on the ground. The former mine, in other words, may eventually carry three separate energy-generating layers stacked from the soil to nearly a thousand feet overhead.
What the record height still has to prove
The machine reached its full 1,197 feet in late September, and the moment was not lost on the team behind it. GICON’s founder and CEO said: “365 meters, this is an overwhelming moment for our entire team. What was long a challenging idea and then an equally challenging construction project now stands as a globally unique facility in Schipkau.”
Yet the turbine has not yet turned a blade in commercial operation. The turbine is scheduled to begin operating in November. Until it does, the doubled-yield projection remains a modeled estimate rather than a measured result, and the industry will be watching to see whether the hub height translates into actual generation figures that match the theory. The Schipkau turbine is still a pilot, and its projected energy yield has yet to be demonstrated in operation.
Maintenance at that altitude will also write its own chapter. Reaching a nacelle at 984 feet is a different undertaking from servicing a standard tower, and the inner-mast design that made construction possible must also accommodate inspection crews, autonomous drone inspection systems and component replacement across a working life of two decades or more. The lattice structure may complicate rotor-blade access in ways that only emerge after the machine has run through its first winter.
What happens if the numbers come out right
If the Schipkau pilot matches its modeled output after a full year of operation, the implications reach well beyond one record-breaking tower. The developers argue that high-altitude wind towers could alleviate Europe’s grid congestion problems in the long term, because high-altitude winds blow more evenly and turbines could also be operated economically where ground winds are too weak, allowing expansion to be more decentralised. That argument matters in a continent where grid-congestion costs ran into the billions last year and where suitable low-altitude wind sites in densely populated countries are increasingly scarce.
Future versions of the design are already planned at rated outputs above 7 MW, which would push the energy case further. Whether those larger machines can be telescoped into position as reliably as this 3.8 MW prototype, and whether the economics of a strand-jack lift pencil out against the savings from avoiding new land permits, is the real test waiting behind the November commissioning date. The wind energy desk that tracks next-generation offshore operations and maintenance will find a parallel challenge here: keeping a machine this tall running through European winters demands logistics that conventional turbine service fleets have never had to plan for.
The honest caveat is that one pilot in one former coalfield proves the construction method, not the business case. But a tower that raises itself on cables above an existing wind farm, on land that once supplied coal to the grid it now challenges, is the kind of genuinely odd situation that only the energy transition makes possible. November, and the first power readings, will say whether the air at 984 feet is as valuable as the mathematics promise.
Hugo is an engineer with strong technical expertise. Multilingual from an early age, his writing combines technical clarity with a strong interest in science and energy.
