"Groundbreaking Flight Time" for a quadrotor. In 2005 AC-Propulsion flew a fixed wing drone for 48 hours and could have gone indefinitely. https://www.machine

"Groundbreaking Flight Time" for a quadrotor. In 2005 AC-Propulsion flew a fixed wing drone for 48 hours and could have gone indefinitely. https://www.machinedesign.com/news/solar-powered-uav-flies-two-days-straight https://www.machinedesign.com/news/solar-powered-uav-flies-t...