Flight endurance depends on the mission profile and maneuvers. Climbing and loitering requires more power.
Typical flight with a 300 m climb after takeoff, 30% time loitering and 70% level flight without extra climbing can last up to60 minutes. Exposing batteries to very low air temperatures can also significantly reduce flight time.
Generally due to altitude of operation UAV loses endurance for 2.5% per 300 m. This means that at 3000 m MSL UAVs expected endurance is in nominal conditions 75% of UAVs endurance at sea level.
