Flying enthusiasts around the country are descending on Oshkosh, Wisconsin for AirVenture, the biggest annual air show in the United States. It's being held July 23-29 this year and is sponsored by the Experimental Aircraft Association. Hundreds of thousands of aviation fans are expected to view about 10,000 aircraft parked at Oshkosh's Wittman Regional Airport.
At the show, Sonex Aircraft and AeroConversions Products unveiled their "E-Flight Initiative" for driving alternative energy research and development for sport aircraft. They showed off a proof-of-concept prototype electric powerplant that was installed in a Waiex airframe.
For a gallery of photos from the show, click here.