Which type of fuel is used by the C-130J APU?

The C-130J Auxiliary Power Unit (APU) utilizes JP-8 aviation turbine fuel. This type of fuel is chosen for several reasons, primarily due to its suitability for military applications, including its compatibility with both jet engines and APUs. JP-8 has a wide range of operating temperatures, offers lower freezing points, and contains anti-corrosive additives that help protect the fuel system components, which is crucial for the reliability and longevity of the APU.

JP-8 also provides improved performance in terms of energy density and combustion efficiency, which can enhance the operational capabilities of the aircraft. Given that the C-130J is designed to operate in various environmental conditions, the characteristics of JP-8 make it a logical choice to ensure the APU performs effectively during ground operations and when power is needed in remote locations.

Other fuel types, such as JP-5, Avgas 100LL, and Jet A-1, do not share these specific benefits for military aircraft like the C-130J. JP-5 is primarily used by naval aviation and has a higher flash point, making it less suitable for the versatile requirements of the C-130J's APU. Avgas 100LL is a low-lead aviation gasoline