Pre-exist solution

 

A 1.5 MW wind turbine of a type frequently seen in the United States has a tower 80 metres (260 ft) high. The rotor assembly (blades and hub) weighs 48,000 pounds (22,000 kg). The nacelle, which contains the generator component, weighs 115,000 pounds (52,000 kg). The concrete base for the tower is constructed using 58,000 pounds (26,000 kg) of reinforcing steel and contains 250 cubic yards (190 m³) of concrete. The base is 50 ft (15 m) in diameter and 8 ft (2.4 m) thick near the center.

The major difference between this one and ours is the gear box.It transfers the kinetic energy through two gears to increase the spinning speed of the motor to increase the Power.

Wind turbines typically cut in at 7-9 miles per hour.

Some wind turbines are designed for very low wind conditions and will start in winds of 2-4 miles per hour. These are only useful in the very lowest of winds.