What does DC stand for in the context of aircraft electrical systems?

In the context of aircraft electrical systems, "DC" stands for Direct Current. This type of electrical current flows in one direction only, providing a steady voltage level, which is essential for powering various systems on an aircraft. Many aircraft systems, particularly older models and smaller aircraft, rely on DC for their electrical systems because it is simpler and less expensive to generate and control compared to alternating current (AC).

Direct Current is particularly well-suited for applications that require batteries, such as emergency power systems and starting engines. It is also commonly used in avionics equipment, lighting, and other systems that necessitate consistent voltage with minimal fluctuations. Understanding the importance of DC in aircraft systems helps highlight its role in ensuring reliable and stable electrical performance in aviation.