Unmanned aerial vehicles (UAVs) represent the fastest growing and the most dynamic growth segment within the aerospace industry. The rapidly increasing fleet of UAVs, along with the widening sphere of their applications, puts new problems before their designers. Although now unmanned aerial vehicles are used mostly in military applications (intelligence, surveillance, and reconnaissance missions; and combat operations—strike missions, suppression and/or destruction of the enemy and its facilities), their future potential civil applications are enormous (e.g., border patrol, forest fire monitoring and firefighting; nonmilitary security work such as surveillance of industrial sites, road/rail infrastructure, mineral exploration, coastal surveillance, pipeline surveillance, spraying of fertilizers, insecticides, aerial photography, land mapping, environmental monitoring, transportation, and gathering scientific data)