Tackling the European refugee crisis with solar-powered UAVs: A fully autonomous 26 hour search-and-rescue flight. One year after having demonstrated the 81-hour continuous solar-powered flight that is still the current world record in flight endurance for all aircrafts < 50kg total mass, the AtlantikSolar UAV has completed its next milestone by demonstrating the first-ever fully autonomous (from launch to landing) solar-powered perpetual flight with significant payload in a 26-hour Search-and-Rescue (SaR) mission.