This is a great set of pictures, getting up early to catch the cool light and the frost has paid off for you.
I dont think the fence adds anything to the first shot personally and draws my eyes out of the frame instead of into the picture. A simple crop will correct that though.
The second one is great, very clear and crisp but you have a slight dark halo around the outside of the blades against the sky, I am guessing its from a little to much USM at a large radius. Watch carefully when applying, especially on pictures with very clean backgrounds.
The third one is unusual to me as I have never seen the blades with the ends at a different angle to the rest. That makes it different to all the other shots I have seen. I would clone out the trail from the aeroplane though as that again adds nothing to the picture. With the background being clear it should be a easy job.