Figure 12-41.--Ram air turbine hydraulic pump assembly.
The other type of system in current use has its own
the actuator is depressurized, thus completing the
compressor and other equipment necessary for
retract cycle.
maintaining an adequate supply of compressed air
during flight. Provision for ground charging this type
Pneumatic System
of system is also provided. In addition to a compressor,
Two types of pneumatically operated emergency
the components in this type of system usually include a
systems are currently used in naval aircraft. One type
filter, a pressure regulator, a moisture separator, a relief
consists merely of one or more storage cylinders, a
valve, a chemical drier, and storage cylinder(s).
control in the cockpit for releasing the contents of the
AIR COMPRESSORS.--A typical air
cylinders, a ground charge valve, and the connecting
compressor is shown in figure 12-43. An installation
lines and fittings. This type of system must be serviced
of this type receives its supply of air from the
with compressed air or nitrogen.
compressor section of the aircraft engine. This air is
12-40
