Changes
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* It is mounted on top of a tower ,requires huge towers leads to complex in operation, maintanace maintenance and high intial initial costs.
* It operates only with upstream or down stream wind directions.
* It can be constructed in offshoresoff-shores.
* It produces large amount of electricity with high efficiency.
[[Image:Horizontal.jpg|center|thumb|Fig 4(a) [http://www.windturbinesnow.com/horizontalaxis-windturbines.htm Horizontal axis wind turbine]]]
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* These are easy to build and maintain, safer, easier to transport and they can be mounted close to the ground.
* These can handle much turblence turbulence in wind than horizontal wind turbines.
* Mostly it can be constructed with two blades
* It operates with any direction of wind
| Advantages
| <nowiki>* Simple and low cost </nowiki>
<nowiki>* Low maintanace maintenance </nowiki>
| <nowiki>* Complete control of real and reactive powers</nowiki>
