Enough system inertia? Have you taken a look at the size and weight of the blades on those giant wind generators? Seriously? You’re telling us that there’s less inertia in a wind park than in a coal or gas generator? I can’t believe it! The moment of inertia is the mass times the square of perpendicular distance to the rotation axis, I = mr2. With 50 meter blades each weighing several tons?? A whole wind park? I mean, come on!!,(reply>), I think I'll go with the engineers' concerns