Hello,
Here are pictures of the two wind generators in Hull MA. The older, smaller one that is out on the very end of the peninsula:
The tower is 165 feet high, and the blades are 150 feet in diameter.
And the newer, larger one that is located near the town line with Hingham:
They both were spinning pretty fast -- the wind was steady and quick strong; you can see how the blades are bent back a bit?
I should add that they are planning to have FOUR more even larger ones: 262 foot diameter blades; to be installed ~2 miles offshore supported on the sea floor. They have apparently gotten the early approvals.