Solar Impulse, a solar-powered airplane with a wingspan of 208 ft, similar to a Boeing 747, is parked in its inflatable hangar at Lambert-St. Louis International Airport on Tuesday, June 4, 2013, in St. Louis. The airplane, which can fly day and night without fuel, uses solar power gathered from 11,628 silicon solar cells mounted on the wing and horizontal stabilizer to power four electric engines. Piloted by Bertrand Piccard and Andre Borschberg, the Solar Impulse is on a journey across America. AP Photo/St. Louis Post-Dispatch, Erik M. Lunsford
ST. LOUIS (AP) — After 10 days in St. Louis, the first plane that can fly day or night without fuel is on its way to Cincinnati.
Solar Impulse started its cross-country trip in Northern California on May 3. It arrived in St. Louis on June 4. The plane took off from Lambert Airport early Friday.
After a stop in Cincinnati it will continue on to Washington before eventually ending the journey in New York. The plane flies at a speed of about 40 mph and carries only the pilot.