Regan Brown
An integrated fuel tank is an area inside an aircraft's structure that has been sealed to store fuel. These tanks are formed within the aircraft's structure by sealing compartments during manufacture. They are commonly found in the wings, fuselage and empennage of the aircraft. The placement of these tanks reduces the stress on the wings during takeoff and flight by putting the heavy fuel directly inside the source of lift. They also reduce the weight that is off-centre from the plane's centre of gravity, making the aircraft more efficient.
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What You'll Learn
Integrated fuel tanks are formed within the aircraft structure
An integral or integrated fuel tank is an area inside an aircraft structure that has been sealed to store fuel. Integrated fuel tanks are formed within the aircraft structure by sealing compartments like wing sections during manufacture.
The wings of an aircraft are often used for fuel storage as they are hollow and unusable for cargo or passenger seating. The presence of structural spars in "wet wing" tanks reduces sloshing. This placement also reduces stress on the wings during takeoff and flight by placing the heavy fuel directly inside the source of lift. It also reduces the weight that is off-centre from the plane's centre of gravity, which would otherwise reduce efficiency by requiring increased use of elevators.
The weight of the tanks and fuel on the wings of smaller aircraft also counteracts wing bending loads during manoeuvres and reduces fatigue on the spar structure.
Fuel tanks placed in the wings are also safer as they are further from passengers and crew in the event of a leak or explosion.
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They are sealed compartments, like wing sections
An integral fuel tank is an area inside an aircraft structure that has been sealed to store fuel. These tanks are formed within the aircraft by sealing compartments like wing sections during manufacture. They are also known as "wet wings" and are commonly used in larger aircraft.
The use of integral fuel tanks allows for the efficient placement of fuel directly inside the source of lift, reducing stress on the wings during takeoff and flight. By placing the tanks in the main wings, the weight of the fuel is distributed evenly, reducing the amount of off-centre weight that would otherwise reduce the aircraft's efficiency.
The wings of an aircraft are often structurally designed to accommodate fuel tanks due to their hollow structure and lack of windows or cargo storage. This design also moves the fuel tanks further from passengers and crew in the event of a leak or explosion, enhancing safety.
Some aircraft, such as helicopters and smaller turboprop planes, utilise bladder tanks, which are reinforced rubberised bags installed in a section of the aircraft designed to hold fuel. These bladder tanks are secured using snap fasteners or cord and loops.
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They improve efficiency by reducing off-centre weight
An integrated fuel tank is an area inside the aircraft structure that has been sealed to allow fuel storage. They are formed within the aircraft structure by sealing compartments like wing sections during manufacture. They are also known as "wet wings" and are commonly used in larger aircraft.
The placement of integrated fuel tanks improves efficiency by reducing off-centre weight. This is because the heavy fuel is placed directly inside the source of lift, i.e. in the main wings rather than near the tail or nose. This reduces the amount of weight that is off-centre from the plane's centre of gravity, which changes as the aircraft flies. Off-centre weight would make the aircraft less efficient by requiring increased use of elevators.
The weight of the tanks and fuel in the wings also counteracts wing bending loads during manoeuvres and reduces fatigue on the spar structure. This further improves the efficiency of the aircraft by reducing the structural stress on the wings during flight and takeoff.
In addition to efficiency gains, the placement of fuel tanks in the wings has safety benefits. The wings are hollow and lack windows, making in-wing fuel storage a feasible and efficient use of space. This also moves the fuel tanks further from passengers and crew in the event of a leak or explosion.
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They are safer than other tanks in the event of a leak or explosion
An integrated fuel tank, also known as an integral tank, is an area inside an aircraft structure that has been sealed to allow fuel storage. They are formed within the aircraft structure by sealing compartments like wing sections during manufacture. These tanks are commonly used in larger aircraft, and they are part of the aircraft structure, meaning they cannot be removed for service or inspection.
Integral fuel tanks are safer than other tanks in the event of a leak or explosion. Firstly, the placement of these tanks within the wings reduces the stress on the wings during takeoff and flight by putting the heavy fuel directly inside the source of lift. This also reduces the amount of weight that is off-center from the plane's center of gravity, making the aircraft more efficient. By having the fuel tanks in the wings, they are also further from passengers and crew in the event of a leak or explosion.
Additionally, certain aircraft have systems in place to reduce the chance of fuel tank explosions. For example, the Boeing 737 has two systems that reduce the chance of ignition. One shuts off the fuel pumps when the fuel output pressure is low, preventing them from heating up. The other system enriches the nitrogen levels in the air in the fuel tank, ensuring there is insufficient oxygen for burning to occur.
In the case of hydrogen fuel cell vehicles, many experts believe that hydrogen fuel is safer than gasoline due to its behaviour in the event of a leak. In contrast to gasoline, which poses a significant fire risk when it leaks, hydrogen gas dissipates harmlessly into the air. Hydrogen fuel cell vehicles are designed with safety in mind, including the use of thick-walled tanks and relief devices to prevent leaks or explosions.
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Bladder tanks are a type of integrated fuel tank
An integrated fuel tank is an area inside the aircraft structure that has been sealed to allow fuel storage. These tanks are formed within the aircraft structure by sealing compartments like wing sections during manufacture. They are also known as integral or "wet wing" tanks.
Bladder tanks, also known as fuel cells or collapsible fuel tanks, are a type of integrated fuel tank. They are reinforced rubberised bags installed in a section of an aircraft structure designed to accommodate fuel. Bladder tanks are rolled up and installed into the compartment through the fuel filler neck or access panel and are secured using snap fasteners or cord and loops inside the compartment.
Bladder tanks are flexible containers designed for the safe storage and transportation of various types of fuels. They are typically made from high-quality materials that are compatible with various fuels, including gasoline, diesel, jet fuel, crude oil, and more. The bladder functions as a separator in the tank, preventing leaks and spills from occurring.
The flexibility of bladder tanks allows them to adapt to the changing volume of fuel, reducing the chances of sloshing and evaporation. This makes them an eco-friendly option as it minimises fuel wastage. Bladder tanks are also cost-effective, as they are relatively inexpensive to manufacture and maintain.
Bladder tanks are commonly used in high-performance light aircraft, helicopters, and some smaller turboprop aircraft. They are also used in remote construction sites, motorsports, military exercises, and humanitarian operations.
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Frequently asked questions
An integrated fuel tank is an area inside an aircraft structure that has been sealed to allow fuel storage. They are formed within the aircraft structure by sealing compartments like wing sections during manufacture.
Integrated fuel tanks are used because they are an efficient use of space. Putting tanks in the main wings reduces the amount of weight that is off-center from the plane's center of gravity, which would otherwise make the aircraft less efficient.
Safety aspects of integrated fuel tanks were examined during the investigation of the 1996 TWA Flight 800 in-flight explosion accident. It is possible to reduce the chance of fuel tank explosions by using a fuel tank inerting system or firefighting foam in the tanks.
