Which type of fuel system is dependent on the force of gravity?

A gravity feed system relies on the natural force of gravity to move fuel from the fuel tank to the engine. In this type of system, fuel is typically stored in a tank located at a higher elevation than the engine, allowing gravity to pull the fuel downward through a series of lines or pipes. This design eliminates the need for mechanical pumps to move the fuel, simplifying the system and reducing potential points of failure.

This method is often used in smaller aircraft or in specific configurations where weight and simplicity are critical, ensuring a reliable fuel supply as long as the tank has fuel and is positioned appropriately. It is important to note that while gravity feed systems can be effective, they may not be suitable for all aircraft, especially those that demand higher fuel flow rates or have complex fuel management needs.

Understanding gravity feed systems is essential for maintenance and operation, particularly in ensuring that fuel lines are clear and that there is adequate head pressure from the fuel tank for effective delivery to the engine.