Photo from the second annual Barnstorming Carnival at Springfield (Ohio) Beckley Airport which was held July 11 & 12, 2015. See http://www.barnstormingcarnival.com/.
More photos below:
Top left: Stinson 10A Voyager from Champaign Air Museum.
Top Right: Fairchild F-24 based at Grimes Field
Bottom left: Piper Apache from Muncie, Indiana
Bottom right: Wooden prop, by Performance Propellers