Vertical windmills are not such a recent concept. In fact, despite that we're accustomed to seeing horizontal axis windmills, the first windmills invented were the vertical ones. The first effective types were invented in the 9th century, but their design has modified very much over the years in order to get a higher efficiency from them.

Vertical windmills have plenty of advantages. Among them is the low sound that they make. Horizontal windmills usually are extremely noisy, a fact that is proven by their settlements in non-populated or low populated areas with not so many habitats around. Due to their silent function, vertical windmills are most of the times used by humans for their homes, metropolitan areas or commercial buildings.

Another advantage that vertical windmills have is that they can catch more wind than horizontal windmills. No matter the direction from which the wind blows, vertical windmills can capture it and transform it into energy. We can't say the same about the horizontal axis form windmills.

A vertical windmill is easier to maintain. It's also safer to do it, also. We owe this to the fact that the location of the generator is at the ground level. Since it is in such a handy place and easy to repair, we save more time & energy when we give it maintenance or when we repair it.

Utilizing the vertical windmills' design also brings benefits for the birds. Birds often fly into the horizontal axis windmill. From this point of view the vertical axis type is safer and there are minimum chances for birds to fly into its blades.

Vertical windmills could also have a highly anesthetic appearance, as they can be adapted to the surrounding area. They don't have a pre-established pattern to pursue when building them. You can find them in several shapes.

The commonest vertical windmills are the Savonius and the Darrieus. The Savonius windmill is largely used for pumping the water or for grain grinding. If you look at it from above, you notice that its model is the one of the letter "S". Unlike the Savonius, the Darrieus windmill is used for generating electrical energy and not for pumping water. Its blades are in shape of the letter "C", providing it the aspect of an eggbeater.

We live in a world where the electrical power is not only starting to become more and more costly, but we're also becoming more aware that many sources that produce it are affecting the environment. Start thinking at building your own vertical or even horizontal axis windmill so you can save money and aid save the Earth in the process.

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