Kiteplanes power up

Fisher, Richard
December 2004
Engineer (00137758);12/10/2004, Vol. 293 Issue 7665, p14
This article reports that the "Laddermill" concept, envisaged by a team at Delft Technical University in the Netherlands, is a chain of wings or kites attached to a looped cable stretching up to 10 km high. The kiteplanes exert an upwards force on one side of the loop and a downwards force on the other, causing the cable to rotate and power a generator in the base station. The kiteplanes' angle and shape can be altered to generate the opposing forces needed. Delft University team leader Wubbo Ockels, an ex-astronaut said that the wind energy at 30,000 ft is 20 times more powerful than at sea level.


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