Wind wheel rotates only when somebody runs holding it why
Answers
If wind speed doubles then windmill can produce eight times more power under perfect conditions.
If there is little wind and blades are moving too slowly wind turbine no longer generates electricity then turbine starts to generate power what is known as cut-in speed.
Power output continues to increase as wind speed increases but at a slower rate.
Turbine reaches maximum speed above which power output is constant under ideal conditions i.e. 22 to 36 miles/hr depending on type of windmill.
Too much wind can damage turbines so windmills have a cut-out speed.
Windmills are normally rated for power which they will generate under ideal conditions.
The short answer is that if they inch, they turn out less power. however if the wind speed doubles, then a windmill may turn out eight times a lot of power below the suitable conditions.
If there's insufficient wind and also the blades are moving too slowly, the turbine now not produces electricity. The rotary engine starts to form power at what's called the cut-in speed. Power output continues to grow because the wind speed will increase, however at a slower rate than it will right once the cut-in purpose. The rotary engine then reaches its most rated wind speed, higher than that the ability output holds steady below ideal conditions, typically twenty two to thirty six miles per hour, reckoning on the kind of windmill.
A turbine includes a rotor with blades that's connected to a shaft. As wind energy hits the blades, the rotor turns, that causes the shaft to show still. because the shaft turns, it's ready to work and turn out either mechanical or voltage. The additional wind that hits the blades, the additional the rotor will flip and therefore the additional energy the turbine will turn out.
so because of this reason the wind wheel rotates only when someone runs holding it.