Which fuel tank is responsible for feeding the engine in the MQ-9?

The header tank is responsible for feeding the engine in the MQ-9. Its primary function is to ensure that fuel is delivered from the fuel tanks to the engine under various operating conditions. The header tank is usually located at a higher point in the fuel system, allowing gravity to assist in feeding the fuel to the engine, which is crucial for maintaining a steady supply of fuel during flight.

The design of the MQ-9's fuel system incorporates this header tank to manage fuel flow efficiently, particularly during maneuvers or changes in altitude that may affect fuel pressure and flow. By positioning the header tank strategically, the MQ-9 ensures optimal engine performance and reliability throughout its mission profile.

While other tanks, such as wing tanks, center tanks, and auxiliary tanks, are involved in the overall fuel storage and distribution, they do not serve the specific role of directly feeding the engine like the header tank does. This distinction highlights the critical role the header tank plays in the aircraft's fuel management system.