What component allows fuel in the collector tank to be fed to the engine during negative-G flight?

In a fuel system, especially in aircraft, maintaining fuel supply to the engine during negative-G maneuvers can pose significant challenges. The correct component that addresses this issue is the flip-flop valve.

During negative-G flight, fuel can move away from the fuel suction point due to the shift in forces, which could lead to engine starvation. The flip-flop valve is designed to respond to these conditions by altering the direction of fuel flow, effectively allowing it to draw fuel from the collector tank to ensure a continuous supply to the engine. This capability is crucial for maintaining engine performance and preventing fuel starvation when the aircraft is in a negative-G attitude.

Other components, although they play important roles in the overall fuel system, do not specifically address the challenge presented by negative-G conditions in the same way. For example, the fuel pump is responsible for moving fuel throughout the system but does not directly account for the position of the fuel in the tanks during maneuvers. Similarly, the motive flow line and transfer jet pump have distinct functions related to fuel circulation and transfer, but they lack the specific adaptability that the flip-flop valve offers in negative-G situations.