This is interesting, Wind farm construction out in Illinois is being halted, because the giant turbines might interfere with military radar - some folks don't care for Wind Farms either, it can spoil their view of the ocean - [via] Link.
In MAKE we show you how to make a Wind Powered Generator - With a motor and some piping, it's suprisingly easy to build this inexpensive, efficient windmill generator. MAKE 05 - Page 90. If you make one and/or have access to wind farms and military radar, could you drop us a note and let us know what could be going on?
http://blog.makezine.com/archive/2006/06/wind_farms_interfere_with.html