China’s Solar-Powered Drone Reaches 20,000 Meters

China’s latest solar-powered drone, known the Caihong (or “Rainbow” in English), has set a domestic record when it comes to unmanned aerial vehicles and their maximum altitude and time aloft. During a secretive test flight that began and ended in an unnamed airport in China’s northwestern region, the solar-powered Caihong reached an altitude of 20,000 meters (66,000 feet)—and stayed in the air for an entire day. Continue reading