To utilize the wing space for the fuel,
Where is the fuel tanks located on small planes? Most of the fuel tanks are located in the wings of the aircraft. There is usually the main tanks that are located in the center of the wings and then there are tip tanks, that are located towards the wing tips.
Wings and belly.
Jumbo jets have several fuel tanks. The majority of these fuel tanks are located in the wings of the aircraft. Some aircraft may also have auxiliary tanks in the tail or belly. The Douglas (now Boeing) MD11 has a fuel tank in the Elevator(horizontal tail surface) that is used to balance the aircraft to fly at altitude with less drag.
They are added fuel tanks so the aircraft can carry more than the normal amount of fuel ; for example, for longer range, or greater endurance.
The safety feature that was designed into PWC fuel tanks was to leave space for the fuel to expand.
conformal fuel tanks
Fuel is generally stored in tanks built into the wings.
They are designed to leave space for fuel to expand.
In most modern aircraft they are in the wings.
Aircraft use three types of fuel tanks using: (1)integral (2)rigid removable (3)bladder.
Those are external fuel tanks, which can be dropped from the plane in flight when they run out of fuel, increasing the aircraft's range. They are also usually dropped when entering a dogfight, in order to reduce weight and make the aircraft more aerodynamic.
It's called 'unusable fuel.' The stats in the operation manual will always state the total fuel capacity and unusable fuel. When there are multiple tanks in multiple locations, the unusable fuel in all tanks will be stated.