WORLD WIND ENERGY NET

 
The drawing on the left was first built with sailcloth vanes (see pictures below), which proved to be too flexible for optimum performance.

The aluminum-vaned model pictured right  (named “Wendy”) was then built. It is a great improvement. Recently, Wendy was raised 12ft onto a revolving aluminum tube mast extension, held rigid by another set of 3 guy cables from the base of the turbine (center picture).   The entire mast/extension-tube/bearings/guy-cables weighs about 40lb. With a better bottom thrust bearing, this extension technique could be duplicated to raise the turbine much higher into stronger winds.