A system, comprising: at least one flight control computer, FCC, associated with at least one UAV , wherein the at least one FCC is configured to: determine, when the at least one UAV is flying in a flight pattern, a direction of travel of the at least one UAV relative to the Sun; adjust a UAV airspeed of the at least one UAV flying in the flight pattern to a first airspeed if the determined direction of travel is towards the Sun; and adjust the UAV airspeed of the at least one UAV flying in the flight pattern to a second airspeed if the determined direction of travel is away the Sun; wherein the first airspeed is greater than the second airspeed to maximize solar capture of a solar array covering at least a portion of the UAV ; a battery pack system comprising: a battery for powering the UAV ; and a power tracker in communication with the battery and the solar array ; wherein the power tracker is configured to receive electrical energy produced by the solar array ; wherein the power tracker is configured to supply electrical charge to the battery ; and wherein the power tracker is configured to provide a steady voltage to the battery while the electrical energy produced by the solar array varies throughout the day as the Sun's position changes in the sky. at least one flight control computer, FCC, associated with at least one UAV , wherein the at least one FCC is configured to: determine, when the at least one UAV is flying in a flight pattern, a direction of travel of the at least one UAV relative to the Sun; adjust a UAV airspeed of the at least one UAV flying in the flight pattern to a first airspeed if the determined direction of travel is towards the Sun; and adjust the UAV airspeed of the at least one UAV flying in the flight pattern to a second airspeed if the determined direction of travel is away the Sun; wherein the first airspeed is greater than the second airspeed to maximize solar capture of a solar array covering at least a portion of the UAV ; determine, when the at least one UAV is flying in a flight pattern, a direction of travel of the at least one UAV relative to the Sun; adjust a UAV airspeed of the at least one UAV flying in the flight pattern to a first airspeed if the determined direction of travel is towards the Sun; and adjust the UAV airspeed of the at least one UAV flying in the flight pattern to a second airspeed if the determined direction of travel is away the Sun; wherein the first airspeed is greater than the second airspeed to maximize solar capture of a solar array covering at least a portion of the UAV ; a battery pack system comprising: a battery for powering the UAV ; and a power tracker in communication with the battery and the solar array ; wherein the power tracker is configured to receive electrical energy produced by the solar array ; wherein the power tracker is configured to supply electrical charge to the battery ; and wherein the power tracker is configured to provide a steady voltage to the battery while the electrical energy produced by the solar array varies throughout the day as the Sun's position changes in the sky. a battery for powering the UAV ; and a power tracker in communication with the battery and the solar array ; wherein the power tracker is configured to receive electrical energy produced by the solar array ; wherein the power tracker is configured to supply electrical charge to the battery ; and wherein the power tracker is configured to provide a steady voltage to the battery while the electrical energy produced by the solar array varies throughout the day as the Sun's position changes in the sky. <EOS>