Why can’t we have a second unit further down the shaft? Is it bird reasons?
In: Engineering
It’s for wind reasons. The wind is stronger up high so the blades are at a height where they get more wind.
If there was enough wind down low for a lower turbine to work well, they would simply make the turbine shorter.
Making a turbine *taller* than it needs to be so you can put 2 sets of blades on it isn’t cost effective because the blades themselves (and gearbox, generator, etc) cost a lot and also the shaft gets more expensive the taller it is and the more weight it holds.
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