Question

Pneumatic system in aircraft by

Answer 1

Aircraft pneumatic systems are used primarily as emergency sources of pressure for many of the hydraulically actuated subsystems. The principle of operation for a pneumatic power system is the same, with one important exception, as that of a hydraulic power system. The air in a pneumatic system is compressible; therefore, the pressure in the system can reduce gradually from the maximum system pressure to zero pressure. In the hydraulic system, as soon as the accumulator fluid has been used and the pump is not operating, the fluid pressure immediately drops from accumulator pressure to zero pressure. The entire pneumatic system, including the air-storage bottles, can act to store air pressure.