What are the two types of fuel cells commonly used?

Bladder type and integral (wet wing) fuel cells are widely used in aircraft for fuel storage. Each type has distinct features that make it suitable for aviation applications.

Bladder-type fuel cells are flexible and can be made from materials that allow them to expand and contract with changes in fuel volume. This type of fuel cell can adapt to varying shapes and contours of the aircraft structure, making it easier to install and maintain.

On the other hand, integral (wet wing) fuel cells are part of the aircraft's wing structure itself. This design eliminates the need for additional fuel tanks, thus reducing weight and improving aerodynamics. By using the wing's volume as a fuel storage area, it provides a more efficient overall design and maximizes the use of space within the aircraft.

These two types of fuel cells reflect a balance of flexibility and efficiency, critical aspects in aircraft design and fuel management systems. Understanding these types allows maintenance personnel and engineers to make informed decisions regarding fuel system designs, maintenance, and modifications on various aircraft.