The scope of electric powered unmanned aerial vehicle (UAV) missions is primarily constrained by the relatively low flight endurance that is characteristic of electric powered UAVs. The purpose in utilizing solar energy to power UAVs is to increase UAV endurance capabilities and ultimately achieve indefinite sustained flight. Traditional solar powered UAVs are designed to statically fix the photovoltaic (PV) cells on the top surface of the wing, keeping the cells virtually parallel to the earth’s horizontal plane during normal flight. This puts significant restrictions on both where and what time of year a solar powered UAV is able to capture enough energy from the sun for the PV cells to be advantageous.
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