Recent and Future Developments
The state-of-art technology in energy harvesting is the wind powered and photovoltaic technologies in the century. Activities like the solar harness UAVs are ongoing. Researchers are looking into better throughput, light weighted technology in unmanned aerial systems. Modern sources of energy available are the fuel cells energy, solar energy, and wind-powered energy. They must provide improvements either in performances or economic reliability in addition to reduce global climate changes. New rotor engine technology for vertical take-off and landing aircraft eliminates airplane runway to save spaces for other air traffic operations. New stealth technology flies without any moving surfaces.