SVR Murthy
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Humans have been utilizing wind power for centuries. From sailboats to windmills, the wind has been an important energy resource throughout human history. 

In recent years, wind power has gained greater popularity as an efficeint sustainable alternative to fossil fuels. Wind farms have started dotting coastlines and mountaintops across the world, and by now you've probably noticed their distinct design.

So why do wind turbines have three blades, as opposed to fewer or more? The answer lies in the engineering behind wind power, and how to maximize yields of energy. In order to produce the highest amounts of electricity efficiently, there's a lot to take into account.

Electricity-generating wind turbines are older than some might think. The first such turbine was invented in 1888, by Charles F. Brush. It had a remarkable 144 wooden blades, and could generate 12 kilowatts of power. 

Up until the mid-1930s, many rural residences in America depended on wind power as their only source of electricity. Turbines were an accessible, cost-effective way to power remote locations that were not otherwise being served by main power lines.

The principles behind the production of wind power are as simple today as they were in the 19th Century. Wind is simply air in motion, and where there is motion there is kinetic energy.

Wind turbines are designed to present an obstacle to that kinetic energy, slowing it and converting it into electrical energy. That obstacle comes in the form of the turbines' blades, which are specially designed to yield the highest amount of energy. However, the design and utilization of turbine blades is a delicate science, and one that relies on a number of factors such as aerodynamics and air resistance.


https://interestingengineering.com/the-scientific-reason-why-wind-turbines-have-3-blades