North Cascades Vintage Fly-In, Waco INF Preps for Flight, Skagit Aero, Concrete, WA. A Waco INF gets ready to taxi out for a flight at Mears Field in Concrete, Washington. It’s the Saturday of the 2012 North Cascades Vintage Fly-In. The hanger belongs to the Skagit Aero Education Museum which specializes in general aviation aircraft from 1930s, 40s and 50s. About 35 aircraft models hang over a few of the 30 plus aircraft in the collection. Inside some of the aircraft are a Luscombe 8-A, a Fairchild F24G, a Baby Great Lakes, two Mooney Mites, and a Piper PA-22 Colt.