Aircraft typically store fuel in the wings, but some planes also have fuel tanks inside the aircraft's body.  Here are some other things to know about aircraft fuel storage: Fuel tank types: Aircraft use three main types of fuel tanks: integral, rigid removable, and bladder. Integral tanks are sealed areas inside the aircraft structure that store fuel. Integral tanks: Integral tanks need baffles to prevent fuel from splashing into the wings when the aircraft maneuvers. Baffle check valves allow fuel to flow to the low, inboard sections but stop it from flowing outboard. Fuel storage in... Show more

Aircraft typically store fuel in the wings, but some planes also have fuel tanks inside the aircraft's body. 

Here are some other things to know about aircraft fuel storage:
Fuel tank types: Aircraft use three main types of fuel tanks: integral, rigid removable, and bladder. Integral tanks are sealed areas inside the aircraft structure that store fuel.
Integral tanks: Integral tanks need baffles to prevent fuel from splashing into the wings when the aircraft maneuvers. Baffle check valves allow fuel to flow to the low, inboard sections but stop it from flowing outboard.
Fuel storage in the wings: The weight of the fuel helps reduce flutterby, providing rigidity to the wing.
Fuel storage in the center wing box: Additional fuel storage is in the center wing box.
Fuel storage in a vertical stab tank: Airplanes such as the 747 can load fuel in a vertical stab tank for extra range.
Fuel storage and handling: Containers must always be kept closed, and not filled above 90% to allow for expansion. If fuel has been in undisturbed storage for more than three months, consider having a sample laboratory tested before using it. 

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