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|  MIL-D-70484(AR)
Single fire - One round from one launcher, successive
SNG
firings shall alternate between launchers from side to
side to maintain weight balance.
Pair Fire - Two rounds, one from each side of the
PRS
aircraft.
Quad Fire - Four rounds, one from each launcher with the
QAD
inboard rockets leading the outboard rockets by 30 5
milliseconds.
The DU shall revert to the next lower mode of fire if rockets
are not available for the mode selected.
3.4.3.1.1.6 Quantity selector. By means of the Front Panel
mounted Quantity selector switch, the DU shall be capable of
selecting the Quantity of Rockets to be fired. The DU shall cause
the preselected number of rockets to be fired with each depression
of the wing stores firing switch as long as the switch is held.
If the wing stores firing switch is released before the required
quantity is released, the DU shall cease firing within one firing
cycle. A successive depression of the wing stores firing switch
shall begin a new firing sequence.
3.4.3.1.1.7 Zone arming switches. The five zone arm
pushbutton switches provide the means of arming the zone for a
particular type of warhead. Zones shall be armable if the master
arm switch is in the "ARM" position and a zone arming switch is
depressed. A successive depression of a zone arm switch will
cause the previously armed zone(s) to be disarmed and zone
selected if previously unarmed to become armed. This action may
be performed while firing or not firing rockets. The depression
of a zone arm switch shall arm or disarm all zones having the same
warhead type selection.
3.4.3.1.1.8 Test switch. The DU provides a single press-to-
test switch for the purpose of executing a complete built-in test
function of the RMS. The test shall only be executable with the
master arm switch in the standby position. The test may be
initiated while on the ground or in flight. During the test the
following visible action shall take place.
1. All display indicators shall be lit for approximately 3
seconds.
2. The display shall indicate the status of each LRU within
the RMS for approximately 3 seconds in order from left to right,
left outboard OU, left inboard OU, DU, right inboard OU, right
outboard OU. A good LRU shall be signified by the presence of a
"7" in the zone display, a failed unit shall be indicated by a
8
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