COMPONENTS
Rain Removal
Components of the windshield-washing system
Positioning the WINDSHIELD ANTI-ICE/RAIN
include a shutoff valve, tank, switch, and a nozzle
removal switch to RAIN controls the rain removal
assembly.
mode of operation. This will actuate the low pressure
solenoid of the anti-ice rain removal air control
Windshield-Washing Shutoff Valve
regulating valve to supply low pressure (5.4 psig) and
low flow (20 lbs/min) air at 250F to the windshield.
The windshield-washing shutoff valve is mounted
to a bracket on the right wing beam in the forward
Windshield Anti-Ice
air-conditioning compartment (fig. 5-9). It is a
solenoid-operated valve that controls air pressure to the
Positioning the WINDSHIELD ANTI-ICE/RAIN
windshield-washing tank. The WINDSHIELD switch
removal switch to ANTI-ICE controls the anti-ice
on the DEFOG/ANTI-ICE & RAIN REMOVAL
mode of operation. This will actuate the high pressure
PANEL controls operation of the valve. The valve
solenoid of the anti-ice rain removal air control
consists of a pressure-reducer valve, a check valve, a
regulating valve to supply high pressure (29.5 psig) and
solenoid-operated combination shutoff and dump
high flow (57 lbs/min) air at 250F to the windshield.
valve, and relief valve. When the solenoid is
Q5-11.
What is the purpose of an F-18 windshield
deenergized, the valve is closed and the outlet port is
anti-ice/rain removal system?
vented to the atmosphere. This shuts off the flow of
Q5-12.
Name the seven major components of an F-18
cooled bleed air to the windshield-washing tank and
windshield anti-ice/rain removal system.
reduces the pressure in the tank to zero. When the
solenoid is energized, the valve opens and regulates the
Q5-13.
What component controls the temperature
pressure of cooled bleed air to the windshield-washing
entering the windshield anti-ice and rain
tank at 10 1 psig. If the pressure in the tank goes above
removal ducts?
13 0.5 psig, a relief valve inside the valve opens and
Q5-14.
The modes of operation for the anti-ice/rain
pressure in the tank is reduced.
removal system are controlled by what
component?
WINDSHIELD-WASHING SYSTEM
LEARNING OBJECTIVE: Recognize the
components and operating principles for a
windshield-washing system.
The windshield-washer system on an EA-6B is
typical of this system and provides cleaning for the
pilot's windshield. The WINDSHIELD switch located
on the DEFOG/ANTI-ICE & RAIN REMOVAL
control panel controls the windshield-washing system.
The system cleans the windshield by directing a stream
of 50 percent water-methyl alcohol mixture over the
outside surface of the glass. The water-methyl alcohol
is dried by engine bleed air through the rain-removal
nozzles. The system uses cooled bleed air supplied by
the auxiliary heat exchanger of the forward
refrigeration unit to pressurize the windshield-washing
tank, which stores the washing fluid. The pressure
forces the windshield-washing fluid through a series of
five nozzles located at the base of the pilot's
windshield. The windshield-washing shutoff valve
controls the cool bleed airflow to the top of the
Figure 5-9.--Windshield-washing shutoff valve.
windshield-washing tank.
5-11
