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 The Front Cover

In order to keep a wind power plant in operation reliably, regular maintenance work is essential. The rotors, in particular, bear enormous mechanical stress and therefore require regular periodic checking for failures. The image of the cover shows the development of a special self-propelled robot, which enables inspections on the surface of a wind turbine?s rotor blades to be carried out mechanically. On page 6 you will find the article about this development.

Publisher's Note


Robot to Inspect Rotor Blades
By Tilo F?rster, Torsten Felsch and Norbert Elkmann, Fraunhofer IFF, Germany

Fast, Reliable Wind Farm Simulations
By Dr John Steinhoff, Professor at University of Tennessee Space Institute and consultant to Flow Analysis Solutions, Inc., USA

Turbine Market Needs Tech Upgrade

By Bradley Green and Neil LeJeune, IXYS Corporation

New CVTs for Wind Turbines
By John Langdon, CEO, Viryd Technologies, USA


WWEA Page January February 2010
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