An important factor in how much power your wind turbine will produce is the height of
its tower. The power available in the wind is proportional to the cube of its speed. This
means that if wind speed doubles, the power available to the wind generator increases
by a factor of 8 (2 x 2 x 2 = 8). Since wind speed increases with height, increases to
the tower height can mean enormous increases in the amount of electricity generated
by a wind turbine.