An electronic engine controller (EEC) or engine control unit (ECU), and its related accessories to control all aspects of an aircraft engine performance. The system was integrated into an efficient, environmentally friendly, hybrid micro gas turbine-based power systems for use in UAVs to increase the efficiency of the gas cycle and improve reliability and durability. It not only provides for efficient engine operation, but it also allows the manufacturer to program engine limitations and receive engine health and maintenance reports. Due to the high number of parameters monitored, it makes possible “Fault-Tolerant Systems”, where a system can operate within required reliability and safety limitation with certain fault configurations and provides better fuel efficiency.