What type of valve is commonly used in fuel tanks to prevent fuel from flowing away during high 'G' maneuvers?

The correct valve used in fuel tanks to prevent fuel from flowing away during high 'G' maneuvers is the flapper valve. This type of valve operates by using a hinged flap that opens in one direction to allow fuel to flow into the fuel pickup area while closing off during high 'G' maneuvering to prevent fuel from sloshing away from the pickup. This is critical for maintaining fuel availability to the engine and ensuring reliable operation during maneuvers that would otherwise disrupt the fuel flow due to changing gravitational forces.

The check valve, while it does allow flow in one direction and prevent backflow, is generally used in systems for preventing the return of fuel or other fluids and does not actively manage slosh behavior during maneuvers. Other options such as the needle valve and poppet valve have specific roles related to flow control and regulation but do not inherently address the need for maintaining fuel in the pickup area under the dynamic conditions of flight.