waveguide pressure during an overpressure
condition.
Air Desiccators
The waveguide pressurization system contains
two air desiccators. The desiccators remove
moisture from the regulated air. The desiccators
contain desiccant to absorb moisture and a silica
gel for an indicating agent. During normal
operation, the silica gel is blue. When moisture
saturation occurs, the gel turns pink. The color
change is visible through an inspection window
on the housing of the desiccator.
Ground Test Ports
The waveguide pressurization system contains
two test ports, one for electronic countermeasures
and one for the radar waveguide. The two test
ports provide a method of using a ground air
source to pressure test the system.
MISSILE LIQUID COOLING
UTILITY SYSTEM
Learning Objective: Identify operating
principles and maintenance safety pre-
cautions for missile liquid cooling utility
systems.
The liquid cooling system in the F-14 aircraft
is used with both the radar and missile systems.
The cooling system heats and cools the Phoenix
missile. The temperature control system consists
of a weapons control system (WCS) cooling loop
for the radar system and a missile cooling loop
for the missile system; both loops are controlled
by a common controller. In each loop, a dielectric
coolant fluid is circulated by a motor-driven
pump. The fluid is filtered to remove air,
moisture, and foreign matter. The right Phoenix
missile fairing (fig. 1-17) contains the mis-
sile coolant pump assembly and the missile
Figure 1-17.—Missile fairing.
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