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|  MIL-T-6396E
the test fluid. The tank shall be simultaneously slosh and vibration tested
in accordance with the applicable conditions specified in 4.6.6.1. The
temperature of' the test fluid shall be as specified in table IV. This test
shall be conducted with the test specimen subjected to a pressure equivalent to
the maximum operating pressure encountered in any prescribed flight conditions.
At the conclusion of this test, the test specimen shall be filled with the
applicable test fluid as specified in 4.5.l and thoroughly inspected for
leakage or other evidence of failure.
4.6.6.5 Special baffling materials. Tanks incorporating reticulated foam or
similar materials for fire and explosion protection shall have the material
removed during the slosh, vibration, or slosh and vibration tests described
herein. If deemed necessary by the contractor or acquisition activity$ a
second slosh test with the foam installed will be conducted.
4.6.7 Vibration. A tank shall be tested in accordance with the procedure
specified in 4.6.6.3 or 4.6.6.4, as applicable, except:
The tank shall not be sloshed.
a.
The tank shall be completely filled with test fluid.
b.
The tank shall be vibrated for 10 minutes using the applicable test conditions
specified.
4.6.8 Slosh
4.6.8.1 Phase I Slosh. A test cube shall be tested in accordance with the
procedure specified in 4.6.6.4, except that this cube shall not be subjected to
vibration. The cube shall be sloshed for 25 hours at 16 to 20 cpm. Type III
cubes shall be supported in a manner specified by the contractor of acquisition
activity. Type II cubes shall be installed in the Gun Fire test structure with
the test structure rigidly mounted to the slosh table. For type II, class C
cubes, the backing board on the four sides shall be removed so that the sides
of the cube are supported by the hat sections of the structure.
4.6.8.2 Phase II slosh. A tank shall be tested in accordance with the
procedure specified in 4.6.6.4, except that the tank shall not be subjected to
vibration. The tank shall be sloshed for 25 hours at 16 to 20 slosh cpm, or 40
hours at 10 to 16 slosh cpm.
4.6.9 Stand test (phase I). The stand test shall be conducted on the second
test cube. Type II test cubes shall be installed in a test structure which has
been lined with brown paper. For class C cubes the backing board for the four
side panels shall be omitted so that the cube is draped across the hat section
in this area. Type III cubes shall be covered with brown paper and tested in
an unsupported condition. The cubes shall be filled with the applicable test
fluid as specified in 4.5.1 containing a staining agent. After 90 days there
shall be no evidence of leakage or other failure. An alternate method of
detecting leakage is acceptable, if approved by the contractor or acquisition
activity.
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