T-45A UJPT, E2-C2, ADV, & IUT Eng-02
Engine
b.
Internal gearbox extracts mechanical
energy from N2 shaft, providing power
to external gearbox
c.
External gearbox mechanically drives
engine and aircraft accessories, e.g.,
generator, hydraulic pumps, and fuel
pumps
4.
Exhaust: annular bypass air mixes with
turbine gases in exhaust mixer and exits
through fixed convergent nozzle and
tailpipe
5.
Monitoring 1.4.6.5
Sg 2, fr 4
a.
RPM: sensed by a tachometer
0
10
0
9
1
generator attached to high-speed
8
2
20
7
3
6
4
5
30
100
PERCENT
40
90
R.P.M.
50
80
60
70
5
4
3
2
5
4
6
(1) Max rpm: 104%
3
1
6
2
GT
0
7
1
7
CX100
F.F
0
8
P.P.H X 1000
(2) Max continuous rpm: 100%
ENGINE INSTRUMENTS
(15,512 rpm N2 )
(3) Idling speed: 55 +/- 2% at sea
level (with bleed valve closed);
+1% rpm increase per 1,500 ft
increase above sea level
b.
Exhaust gas temperature (EGT):
thermocouple junction box derives
EGT information from two
thermocouples, T2 and T6; EGT
equals T6 corrected for T2
(1) T2 thermocouple, mounted in
airstream just aft of N1
compressor, measures input
(ambient) air temperature;
T6 thermo-couple, mounted in gas
flow just aft of N1 turbine
Page 2-6
(8-03) Original
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