Yongkyu Song is Professor of Aerospace and Mechanical Engineering at Korea Aerospace University, Republic of KOREA. He is also Director of Advanced UAS Research Center. He has been Dean of Research Affairs at KAU. He received his degrees from Seoul National University, (B.S., 1985, M.S., 1987) and The University of Michigan (Ph. D., 1992). He has been extensively involved in the development of various UAVs including crop-dusting multicopter and autonomous formation flight of UAVs.