Hybrid Fuel Cell – Battery System as a Main Power Unit for Small Unmanned Aerial Vehicles (UAV)

1 AGH-University of Science and Technology, Faculty of Fuels and Energy, 30-059 Cracow, al. Mickiewicza 30, Poland 2 Rzeszow University of Technology, The Faculty of Mechanical Engineering and Aeronautics, Al. Powstańców Warszawy 12, 35-959 Rzeszów PL 3 Rzeszow University of Technology, The Faculty of Electrical and Computer Engineering, ul. W. Pola 2, 35-959 Rzeszów PL * E-mail: potoczek@agh.edu.pl,