T-45A UJPT, E2-C2, ADV, & IUT Eng-26
Engineering Review
C.
Environmental control system (ECS)
Sg 7, fr 4
1.
Air conditioning system
a.
Primary heat exchanger
(1) Receives bleed air from fifth-stage
engine compressor ECS port
ECS BLOCK DIAGRAM
(2) Reduces temperature of engine
compressor bleed air before
passing it to cold air unit (CAU)
b.
CAU: compresses bleed air received
from primary heat exchanger
(temperature rises)
c.
Secondary heat exchanger: cools
compressed air before it reaches CAU
turbine
d.
CAU turbine: further cools air
received from secondary heat
exchanger by expansion through
turbine
e.
Temperature control system: controls
final conditioned air temperature by
mixing cold air from CAU turbine with
hot air taken prior to primary heat
exchanger
f.
Cockpit air distribution
(1) Location: cooling ducts in both
cockpits, under left and right
canopy rails
(2) Function
(a) Temperature-controlled air
distributed to crew ventilation
ducts and head, body, and
foot louvers
Page 26-65
(8-03) Original
Previous Page
