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| MIL-R-81939B(AS)
4.6.6
Secondary release. This test shall apply to Type I and Type II bomb racks only.The
bomb rack shall be released, with a 1,621.62 kilogram (3,575 pound) store suspended from the 762
millimeter (30 inch) hooks, at the following temperatures:
Room Temperature
a.
b.
-56.7C (-70F)
+70C (+158F)
c.
One release shall be made at each temperature. The auxiliary release assembly of the
bomb rack shall be used to release the store. A 28 VDC voltage shall be used to ignite the MK-19 impulse
cartridge.
Type II bomb rack, additional conditions. prior to each of the above releases, the
4.6.6.1
IFOBRL will be in the locked position. It shall be disabled by applying 28 VDC to the M55 ignition
element of the unlock indicator assembly. Proper position of the indicator switches in the unlock indicator
assembly shall be verified before and after each release, The unlock indicator assembly shall be replaced
with a spare unit, supplied by the contractor (see Tables I and II), after each release.
4.6.7
Additional tests. The bomb rack shall pass the following tests of MIL-T-7743 as
specified, except as modified herein. The arming units shall meet the requirements of 4.6.4 when they are
required to be tested, and they shall be tested in the vertically downward direction only.
a.
Manual Function (see 4.6.7.1)
b.
Electrical Characteristics (see 4.6.7.2)
c.
Lag Determination (see 4.6.7.3)
d.
High-g Release (see 4.6.7.4)
e.
Sand Test (see 4.6.7.5)
f.
Salt Spray (see 4.6.7.6)
Vibration Test (see 4.6.7.7)
g.
h.
Shock Test (see 4.6.7.8)
Life Test (see 4.6.7.9)
i.
Static Test (see 4.6.7.10)
j.
4.6.7.1
Manual function. When testing Type II bomb racks, the IFOBRL shall be operated
manually.
4.6.7.2
Electrical characteristics. The minimum operating voltage shall be determined by
demonstrating that all electrical equipment on the bomb rack operates when 20 VDC is applied to the
terminals of the applicable bomb rack connectors.
4.6.7.3
Leg determination. This test shall be conducted in accordance with the lag or time of
release determination test for dive bomb (DB) items. The 113.4 kilogram (250 pound) and 453.6 kilogram
(1,000 pound) store shal1 be used for 355.6 millimeter (14 inch) suspension tests. The 907.2 kilogram (2,000
pound) and 1,621.62 kilogram (3,575 pound) store shall be used for 762 millimeter (30 inch) suspension
tests.
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