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SIZE), and the corners are not visible, the last step is to
adjust the electronic focus, (FOCUS), so that the gray
scale image appears crisp and sharp.
4-20 Change 3
TM1-1520-238-10
Figure 4-9. Integrated Helmet and Display Sight Subsystem
4-21
TM 1-1520-238-10
4.19 CYCLIC AND COLLECTIVE MISSION 4.19.1 Cyclic Switches, Cyclic stick mission equip-
EQUIPMENT SWITCHES. ment switch position and functions are described in
The cyclic and collective have several switches used for
table 4-5.
the mission equipment (fig 2-26).
Table 45. Cyclic Stick Switoh Functions
Control/
Switch Position Function
Weapon A five position momentary switch which actions the selected weapon and removes
Action the electrical trigger interlock. The actioned weapon maybe deselected by
Switch reactioning the same weapon or by selecting another weapon.
(WAS)
G Actions the 30mm Gun (12:00 position on the WAS).
R Actions the Aerial Rocket system (9:00 position on the WAS).
M Actions the Hellfire missile system (3:00 position on the WAS).
c Fires the chaff, if Chaff system armed (6:00 position on the WAS).
Flight A three position momentary switch which permits the selection of the different
Symbology flight symbology modes. Cruise and Transition, alternately, in the forward position
Mode and Hover and Bob-up in the aft position.
Switch
Trigger A two position guarded trigger which enables weapons firing. The first detent is
for normal selected weapons usage; the second will override the selected weapons
performance inhibits but not the safety inhibits of the selected weapon.
4-22
TM 1-1520-238-10
4.19.2 Collective Switches. Collective stick mission
equipment switch position and functions are described
in table 4-6.
Table 46. Collective Stick Switch Functions
Control/
Switch Position Function
RF OVRD Immediately modes the missile system for an RF/IR missile.
NVS This two position switch is not active unless the crewmember has selected the
NVS position on the sight select switch on the fire control panel.
PNVS Pilot: Select the PNVS as the sensor to be used by the pilot. PNVS video with
flight symbology will be displayed on the pilot HMD.
CPG: If the PLT/GND ORIDE switch is OFF, the position is inactive. If the PLT/
GND ORIDE switch is in ORIDE, this position allows takeover of control of the
PNVS from the pilot by placing the NVS select switch to PNVS and coupling it to
the CPG helmet LOS. PNVS video with flight symbology will be displayed on the
CPG HMD.
TADS Pilot: Permits the pilot to take control of the TADS from the CPG and
automatically place the TADS in WFOV FLIR with symbology. This would be done
in the event of a PNVS failure and is the PNVS backup mode.
CPG: Automatically modes the TADS for WFOV FLIR with flight symbology and
couples the TADS to the CPG helmet LOS. This mode is accomplished
independent of the PNVS and would be used by the CPG or IP to provide separate
monitor for obstacle or terrain avoidance.
PLRT/ PLRT Alternates the FLIR polarity; back and forth; black hot or white hot.
BRSIT
HMD
BRSIT Activates the IHADSS sight electronics unit to compute the boresight bias.
HMD
4-23
TM 1-1520-238-10
4.20 PILOT ARMAMENT CONTROL PANELS.
The pilot Armament control panels are the Aerial Rocket
Control Panel, the Missile Control Panel, and the
Fire Control Panel.
4.20.1 Pilot Aerial Rocket Control Panel
(ARCS). The pilot ARCS panel, placarded ROCKETS
(fig 4-10), is located in the pilot left console (fig 2-11).
The ARCS receives power from the No. 3 essential dc
bus and is protected by the RKT ELEX circuit breaker
on the pilot overhead circuit breaker panel. The ARCS
is continuously monitored by FD/LS; the on command
test (test 11-RKT) will fault isolate to the LRU. The
function of each control is described in table 4-7. Figure 4-10. Pilot Aerial Rocket Control Panel
Table 4-7. Pilot Aerial Rocket Control Panel/Indicator Functions
Control/
Indicator
Zone
Inventory
QTY REM
Switch
PD4
RC4
DP4
WP4
IL4
SK4
6PD
6RC
6IL
6SK
6MP
Blank
Function
Indicates the type of 2.75 FFAR round loaded in the zone.
High explosive warhead with PD fuzing with a MK 40 motor.
High explosive warhead with remote set fuzing with a MK40 motor.
High explosive dual purpose warhead with PD fuzing with a MK 40 motor.
White phosphorus warhead with PD fuzing with a MK 40 motor.
Illumination warhead with remote set fuzing with a MK 40 motor.
Smoke warhead with remote set fuzing with a MK 40 motor.
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