You have to jump on them and turn them counter clockwise.
You jump on the windmill blades.
you turn the mill COUNTER CLOCKWISE.
if you are talking about the hover craft on astroknights it is in the top of the wind mill tower. spin the blades on the wind mill and the top will open up so you can get it
Jump up to the roof inside the mill and pull on the rope, the go outside the mill and jump on the blades to make them spin counter-clockwise.
Go to the fan part of the mill, jump in the middle of the wooden blades contour clockwise (left) until the glass dome on the top opens all the way.
pound it with the mech's weed whacker
First, you have to go in the mill and pull the rope. That will lift the thing holding back the mill from turning. Then, go outside and jump on the on the part that is supposed to move. That will get the lid on top of the mill to open. Enter into the opening and you will find the hover board.
you stand on it
you get on top of the ye old romour mill sign, and jump on the wind mill blades and make the wind mill move. Jump about 4-5 times. Then, jump onto the middle of the windmill, and from that jump on the roof and enter.
Turn the windmill blades anticlockwise and the roof will open. They man to the left of the mill will give you manure if you talk to him. USE the manure when you're inside the top dome on the mill. It will be used to power the space board and it will fly down to the marsh below the mill to the right. Don't forget to collect the rope hanging on the mill wheel at the edge of the marsh!
you get it from a farmer near the mill
on top of the inn