This seminar presents the research on a feasibility of a novel hybrid propulsion architecture based on the Combined Electro-Thermo-Chemical (CETC) cycle for Unmanned Aerial Vehicles (UAVs). The CETC approach combines a Solid Oxide Fuel Cell (SOFC), an Internal Combustion Engine (ICE), and a thermochemical recuperation of waste heat to enhance the overall energy conversion efficiency and flight endurance.