[DB]

I think I found some pictures.

That's insane.

The lateral forces have to be enormous. They must dig a deep hole to support it...

Wouldn't want to be around one during a major storm...

[dayglored]

> I think I found some pictures. That's insane.

Nope, quite sane. Amazing, though.

> The lateral forces have to be enormous. They must dig a deep hole to support it...

Well, yeah...

> Wouldn't want to be around one during a major storm...

I'm certain they feather the blades. The rotor doesn't get going very fast -- with that big a blade, the tip speed approaches the speed of sound at surprisingly low RPM. Consider, if it's 341 feet diameter, the tip will hit Mach-1 at one rev-per-second. 60 RPM.

So you know they keep it below that.