What are the main types of pneumatic systems in an aircraft?

The main types of pneumatic systems in an aircraft primarily focus on the application of compressed air for various operational functions. One significant application is in systems responsible for brake actuation. Pneumatic brake systems utilize compressed air to operate brakes effectively, providing the necessary force to slow down or stop the aircraft during landing and taxiing. This system is crucial as it enhances safety and control during critical phases of flight.

Pneumatic systems can also be involved in various other operations, such as fuel tank pressurization, door operations, and cabin heating. However, these functions vary in terms of priority and impact on aircraft safety and performance. While they each serve important roles in aircraft operation, the utilization of pneumatic systems for brake actuation stands out due to its critical function in ensuring the aircraft can be controlled safely during landings and stops, emphasizing why it is recognized as a main type within the context of aircraft pneumatic systems.