T-45A UJPT, E2-C2, ADV, & IUT Eng-19
Flight Instruments
Sg 8, fr 1
SUMMARY
Review Menu
SAHRS/NGS provides magnetic compass heading, pitch,
and roll information to the ADI, HSI, and HUD. The pitot
static system provides input to the altimeter, the Mach/
airspeed indicator, and the VSI. The AOA system is
used to maintain precise airspeed necessary for carrier
and field operations by constantly monitoring the airflow
relative to the fuselage. The AOA system provides inputs
to the AOA indicator, the AOA indexer, the HUD, and the
external approach lights.
The independent flight instrument systems include the
radar altimeter, the accelerometer, and the clock/
stopwatch. The standby AI and standby compass are
used primarily as backups in the event that the main
flight instruments/systems (ADI, HSI, SAHRS/NGS) have
failed. During low-level flight and landing operations, the
radar altimeter is used as the primary source for altitude
information. The accelerometer identifies the g loads
placed on the aircraft and the clock/stopwatch is used as
a timepiece and to identify elapsed mission time.
The flight instrument system interfaces with the following
aircraft systems: electrical, SAHRS, pitot static, CNI,
acceleration, ADRS, HUD, IFF, and the NAV TRNG
panel.
CONCLUSION
Correctly operating the flight instruments is essential to
successful flight completion, so you must thoroughly
understand them.
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(8-03) Original
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