Windshield-Washing Tank
The windshield-washing tank is built into the
outside structure of the right engine inlet duct. A
windshield-washing tank cap is removed to fill the tank.
The tank holds 1 1/2 gallons of washing fluid, which is
a mixture of 50 percent methanol (methyl alcohol) and
50 percent water.
Windshield Switch
The WINDSHIELD switch is a single-pole,
three-position switch mounted on the
DEFOG/ANTI-ICE & RAIN REMOVAL PANEL (fig.
5-10). The three positions are OFF, AIR, and WASH.
Figure 5-11.--Windshield-washing nozzle assembly.
This switch controls the operation of the
windshield-washing shutoff valve and rain-removal
tank exceeds 13 0.5 psi, the relief portion of the
pressure-regulator shutoff valve. The WINDSHIELD
shutoff valve opens, reducing tank pressure.
switch is momentarily in either WASH or AIR position.
The 10-psi air pressure in the windshield-washing
When released, the switch returns to OFF. Placing the
tank forces the mixture of 50 percent methyl alcohol
switch to WASH directs streams of washing fluid
and 50 percent water through five nozzles of the
against the base of the pilot's windshield; placing the
windshield-washing
assembly.
Releasing
the
switch at AIR directs a wide stream of hot air across the
WINDSHIELD switch allows it to return to OFF. This
glass.
closes the windshield-washing shutoff valve and the
Windshield-Washing Nozzle Assembly
supply of air to the windshield-washing tank. Excess
pressure in the tank is vented into the atmosphere.
The windshield-washing nozzle assembly consists
Q5-15.
Describe the mixture content on an EA-6B
of five nozzles connected to a common inlet tube (fig.
windshield-washer system.
5-11). The nozzles protrude through the rain-removal
nozzle assembly at the base of the pilot's windshield.
Q5-16.
What type of valve is the windshield-washing
shutoff valve?
OPERATION
Q5-17.
What event takes place if the pressure in the
windshield-washing tank goes above 13 0.5
The WINDSHIELD switch controls the
psig?
windshield-washing system. Holding the switch to
WASH routes 28 Vdc to open the windshield-washing
Q5-18.
What is the capacity of the
shutoff valve. With the valve open, regulated air
windshield-washing tank?
pressure from the auxiliary heat exchanger of the
forward refrigeration unit is routed to the top of the
ANTI-G SYSTEM
windshield-washing tank. The valve controls the
pressure in the tank at 10 1 psi. If the pressure in the
LEARNING OBJECTIVE: Recognize the
components and operating principles for an
anti-g system.
The anti-g system automatically regulates
air-pressure to the pilot anti-g suit. The anti-g suit
reduces the fatiguing effect of repeated exposure to
positive or negative g-forces that can cause grayout
and/or blackout. The anti-g system also provides a
method by which the pilot can relieve fatigue and
physical tension during extended flight. Air pressure to
the anti-g system is supplied from the air cycle
air-conditioning system.
Figure 5-10.--Windshield switch.
5-12