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and pulled out to set the hour and minute hands. An
elapsed time selector in the upper right comer controls
the elapsed time mechanism. This mechanism starts,
stops, and resets the sweep second and elapsed time
hands.
2.36 ANGLE-OF-ATTACK SYSTEM
The AOA system measures the angle between the
longitudinal axis of the aircrat? and the relative wind.
This is used for approach monitoring and to warn of an
approaching stall. Optimum approach AOA is not
affected by gross weight, bank angle, density altitude,
or load configuration (see Figure 2-123 for
AOA conversions).
The system includes a probe-type transmitter, approach
lights, an indicator, and an indexer. The indexer
and approach lights are controlled by the indicator,
which is electrically slaved to the sensor probe transmitter.
In flight, the probe, which is on the left side of the
fuselage, aligns itself with the relative airtlow like a
weather vane.
Probe anti-icing is provided by means of a 115-Vat
heating element along the probe and probe housing. The
heating element is controlled by the ANTI-ICE switch
on the pilot right console. During ground operation,
probe heat is on with the landing gear handle down and
the switch in ORIDE/ON. With weight on wheels, the
position OFF/OFF and AUTO/OFF deactivatet he probe
heating element.
ORIGINAL
NAVAIR Ol-F14AAG-1
SEA LEVEL
10
0
Figure2 -123.A ngle-of-AttacCk onversio(nS hee1t of 2)
2-237 ORIGINAL
NAVAIR QI-FUAAD-I
SEA LEVEL
INDICATED PRESSURE
DATJEA N”AR1Y9 74
DATBAA SISFU: GHTTE ST ALTITUDE 35,000 FEET
AlRCRACFOTN FIO”RATION:
FLAPS,?.ULPAO,T ESA URP S. PEEBDR AKES
RETRAC- TcEmDc OPERATIO14N, AL
AIM-7F
Figure 2-123. Angle-of-Attack Conversion (Sheet 2 of 2)
ORIGINAL 2.238
NAVAIR Ql-Fl4AAD-l
2.36.1 AOA Test. A safety of flight check of the
AOA indicator and other aircratt instruments can be
performed while in flight or on the deck when INST is
selected on the pilot’s MASTER TEST switch, the reference
bar on the AOA indicator should indicate 18.0
33.5 tits. A check of the indexer can be made by
selecting LTS on the MASTER TEST switch.
2.36.2 AOA Indicator. This indicator (Figure 2-
124) displays the aircraft AOA and provides a stall
warning reference marker, a cliib bug, cruise bug, and
an AOA approach reference bar for landing approach.
AOA is displayed by a vertical tape on a calibrated
scale from 0 to 30 units, equivalent to a range of -10’ to
+40° of rotation of the probe. The approach reference
bar is provided for approach( on speed)A OA at 15u nits.
The AOA indexer and approach lights will automatically
follow the indicator.
Theclimbreferencemarkerissetat5.0unim,thecmise
markerat8.5uoits,andtbestallwamingmarkerat29unitp.
Theser eferencem arkersa m presett o the optimum AOA
valuesa ndc annot be changedb y the pilot.
2.36.3 AOA Indexer. The AOA indexer on the pilot
glareshield (Figure 2-124) has two arrows and a circle
illuminated by colored lamps to provide approachin formation.
The relay-operatedc ontactsi n the AOA indicator
also control the AOA indexer. The upper arrow is for
high AOA (green), the lower arrow is for low AOA
(red), and the circle is for optimum AOA (amber). When
both an arrow and a circle appear, an intermediate position
is indicated.
2.36.3.1 Indexer Lights. The indexer lights function
only when the landing gear ham-lie is down. A
flashert it causest he indexer lights to pulsatew hen the
arresting hook is up and the HOOK BY-PASS switch is
in CARRIER. The intensity of the indexer lights is controlled
by the INDEXER thumbwheel control on the
pilot MASTER LIGHT panel.
2.36.4 Approach Lights. The approach lights consist
of red, amber, and green indicator lights above the
nosegear strut. The lights are actuated by the AOA indicator
and provide qualitative AOA information to the
landing signal officer during landing approaches. A
flasher unit in the AOA system will cause the approach
lights to pulsate when the arresting hook is up with the
landmg gear down and the HOOK BY-PASS switch is
in the CARRIER position. When the FIELD position of
the HOOK BY-PASS switch is selected, the flasher unit
is disabled.
ANGLE-OF-ATTACK
INDICATOR
Figure 2-124. Angle-of-Attack Displays
2-239 ORIGINAL
NAVAIR Ol-Fl4AAD-l
A green approach light indicates a high AOA, slow
airspeed, an amber light indicates optimum AOA; and
a red approach light indicates a low AOA, fast airspeed.
2.37 CANOPY SYSTEM
　
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