Final answer:
FADEC requires power from the aircraft's electrical system during initial engine start-up or when the engine is not running. It is important for system checks and readiness. Technologies like Thermawing and Thermacool also highlight the need for reliable electrical power in aircraft systems.
Step-by-step explanation:
The Full Authority Digital Engine (or Electronics) Control (FADEC) system in aircraft requires power from the aircraft's electrical system at specific times. Typically, FADEC systems are designed to be self-sufficient once the aircraft engine is running, as they are powered by alternators driven by the engine itself. However, the FADEC system will require power from the aircraft's electrical system during initial engine start-up or when the engine is not running.
This is vital for various preparatory functions such as initial system checks, configuration, and to ensure that the FADEC is ready to take over control once the engine starts. In modern aviation, technology advancements such as Thermawing and Thermacool systems are powered by high-output alternators, similar to the ones that would supply the necessary electric power to the FADEC during start-up.
Thermawing provides reliable anti-icing and deicing capabilities, while Thermacool offers an innovative electric air conditioning system that can be used even before the engine is started, indicating the importance of a reliable electrical power source for essential aircraft systems including FADEC.