What is an auxiliary fuel tank used for?

An auxiliary fuel tank is designed specifically to extend the range of an aircraft. These tanks provide additional fuel capacity beyond what is stored in the main fuel tanks, allowing the aircraft to fly longer distances without the need for immediate refueling. They can be especially useful for missions that require additional endurance, such as long-haul flights or when operating in remote areas where fuel may not be readily available.

The key function of auxiliary tanks is to enhance the aircraft’s performance by increasing its fuel availability, which translates to increased flight time and the ability to operate on longer routes. They may be installed in various parts of the aircraft, depending on the design and purpose, but their primary role remains the same: to extend the operational capabilities of the aircraft through additional fuel capacity. This makes them essential for various aviation operations beyond the standard range provided by the primary fuel tanks.