China Advances it Super Solar Drone to Speed of 125 mph and 65,000 feet, Stay Airborne for 5 years
http://www.popsci.com/china-solar-powered-drone
Meet China's huge solar-powered drone, a 130-foot-wide machine designed to fly at more than 65,000 feet, for days on end. How? A super lightweight body and renewable energy tech that can power all eight of its electrical propellers.