T-45C TS, ADV & IUT ENG-17
OBOGS & ECS/Pressurization System
9.
Cockpit air distribution
a.
Receives conditioned air from air conditioning
pack
b.
Temperature-controlled air distributed to crew
Overlay 9
ventilation ducts and head, body, and foot
Crew Ventilation Ducts
louvers
c.
Ram air and inducer shutoff valves operate
automatically by proximity switches on landing
gear
(1) Ram air valve: closes during normal
operation when weight-on-wheels (WOW)
switch senses that aircraft is airborne
10. Canopy defog
Overlay 10
Defog Ducts
a.
Receives conditioned air from air conditioning
system and engine compressor air during
maximum defog
b.
Distributes conditioned air through canopy
defogging ducts
11. Ram air ventilation
Overlay 11
Ram Air
a.
Inlet/outlet valves operated by air pressure from
canopy seal system
b.
Admits air into forward cockpit
c.
Expels used air through ram air outlet valve in
aft cockpit
d.
Controlled automatically via WOW switch
(1) Ground (weight-on-wheels): opens ram air
valves automatically on touchdown when
air conditioning system switch is in
NORMAL, DEFOG, or MAX DEFOG
position
Original (9-98)
Page 17-16
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