T-45A UJPT, E2-C2, ADV, & IUT Eng-19
Flight Instruments
3.
Controls/switches/indicators: none in
cockpit
4.
Subsystem interfaces
a.
Power: 28 VDC essential services bus
(heater, 28 VDC generator bus)
b.
Weight-on-wheels switch controls AOA
probe heat (power applied when
weight-off-wheels)
c.
Sends signal to AOA indicators and the
HUD
d.
Sends signal to rudder pedal shakers
at 21.5 units AOA
E.
Summary:
The AOA system is used to maintain precise
airspeed necessary for carrier and field
operations by monitoring the airflow relative to
the fuselage. Airflow direction is detected by a
probe using an internal potentiometer to transmit
DC voltage to the AOA indicators in each
cockpit. The flight instruments receiving AOA
outputs are the AOA indicator, the AOA indexer,
and HUD. In addition to the cockpit indicators,
the approach lights also receive AOA outputs.
VI. Independent instruments
Sg 6, fr 1
Lesson Organization
A.
Radar altimeter (AN/APN - 194)
Sg 6, fr 2
1.
Location: right side of instrument panel
below barometric altimeter, both cockpits
2.
Function
a.
Uses pulse radar to provide altitude
information from 0 to 5,000 ft AGL
RADAR ALTIMETER
Page 19-26
(8-03) Original
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