T-45C TS, ADV & IUT ENG-19
Flight Instruments
D.
AOA transmitter probe
Sg 7, fr 6
Video: AOA
1.
Location: forward left side of fuselage
Transmitter Probe
2.
Function: probe senses angle of relative airflow to
longitudinal axis of aircraft when airspeed exceeds
90 KIAS
a.
Rotates over range of 50 degrees in response
to air pressure entering slots in forward face of
probe
b.
Two potentiometers regulate DC voltage signal
in response to probe rotation
c.
Probe assembly contains body heater to
prevent icing and condensation
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 probe heat
(power applied when weight off wheels)
c.
Sends signal to AOA indicators
d.
Sends signal to DEU via ADR for AOA display
Sg 7, fr 7
on HUD and ADI display
Angle of Attack
(Readout)
e.
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
Original (9-98)
Page 19-20
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