Posted: Oct 07, 2017 8:04 am
by crank
There is something about number of bird kills if they spin too fast. And there is a simple relationship with tip speed to rotation rate and radius. The tips can't go supersonic, so if the blades get really long, they're going to have to go fairly slow rotation-wise.

None of these huge turbines could withstand the hot-air movement coming out of the oval office.