Although any development would be years down the road, St. Louis, Mo.-based wind energy developer Wind Capital Group purchased a proposed wind power project in central Kansas, a company official said Friday.Wind Capital bought the project – under development in Ellsworth, Rice, McPherson, Russell and Barton Counties – from Airstream Energy of Scottsdale, Ariz. The firm plans to continue developing the site, said Jan Anderson, WCG public affairs director. Airstream had already secured leases from landowners in the area for the potential Coronado Ridge wind farm.