What role does aviation fuel play in aircraft engines?

Aviation fuel primarily serves as a combustion agent in aircraft engines. This means it is the key substance that burns within the engine to produce the necessary thrust for flight. During the combustion process, aviation fuel mixes with air and is ignited, leading to a rapid expansion of gases. This explosion drives the engine's turbines or pistons, converting the chemical energy stored in the fuel into mechanical energy that propels the aircraft.

While some fuels may have properties that help with lubrication, cooling, or even filtration to a degree, the main function of aviation fuel is to provide energy through combustion, making it essential for the engine's operation. Understanding this core function is crucial for anyone studying aircraft systems and fuel management, as it directly impacts performance and safety.