Generator rotor blade principle
Rotor blades work by capturing the kinetic energy of the wind and converting it into rotational motion. When the wind blows, it creates a force that pushes against the surface of the rotor blade, causing it to rotate around the hub. [PDF Version]
Wind blade generator diameter
According to The United States Department of Energy, most modern land-based wind turbines have blades of over 170 feet (52 meters). This means that their total rotor diameter is longer than a football field. [PDF Version]FAQs about Wind blade generator diameter
How big are the blades of a wind turbine?
For an average 1.5 MW turbine, the blades are between 35 to 45 meters. This gives an average rotor diameter of around 75 to 100 meters.
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Wind blade generator as a seesaw
This model demonstrates how wind energy is converted into electrical energy using a wind turbine. When air (wind) blows on the blades, it makes them rotate — this rotation drives a DC motor (acting as a generator) that produces electric current to light up an LED bulb. [PDF Version]