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9 ingenious wind turbine designs

By: Bryan Nelson on April 29, 2013, 3:29 p.m.
Laddermill project

Photo: Delft University of Technology

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Laddermill project

This innovative design by researchers at Delft University in The Netherlands makes use of a string of tethered "kiteplanes" that soar in the high-altitude winds of the jet stream. Essentially, the aerodynamics of the planes makes them fly in a continuous loop, which turns an electrical generator on the ground. The principle advantage of this "Laddermill" design is that it can capture the consistent and high-speed winds that exist at over 30,000 feet.