TimberTowers is currently building a 100 meter tall wooden mast that will eventually be topped with a 1.5 MW wind turbine, and they have plans to build a 140 meter tall tower near Hanover. According to DW, that extra height could allow the turbine to generate 30 to 40% more electricity than on a standard mast, while the cost of construction would be 20 percent lower.
Please read full and follow at: