Bridge ribbon (see drawing 9204181 covering a detail of drawing 9204185).

Page Title: Bridge ribbon (see drawing 9204181 covering a detail of drawing 9204185).
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MIL-I -50412 (MU)

4 .3,2.4 Bridge ribbon (see drawing 9204181 covering a detail

of drawing 9204185).

4.3.3 Testing

4,3.3.1 Stability (see 3.2), Major defect, Code No. 05001. -A

stability heat test at 120 degrees C shall be performed in accor-

dance with MIL-STD-286, Method 404.1.2. A random sample of five

test specimens of 2.5 grams each shall be tested for each lot of

propellant. Failure of any sample to meet the requirement of 3.2

is cause for lot rejection,

4.3.3.2 Bulk Density (see 3.3), Major defect, Code No. 06001.-

Lot sampling shall be in accordance with MIL-STD-414, Inspection

Level TV with an AQL of 0.40 percent. Bulk density of individual

front supports shall be determined in accordance with ASTM-D-792

using water as the Immersion liquid. If the sample fails the

acceptance criteria the lot shall be rejected (see 6.6).

4.3,3.3 Relative Quickness (see 3.4), Major defect, Code No.

07001. -The relative quickness of the front support shall be determined

at 8500 psi using a sufficient number of randomly selected front

supports per lot to provide a loading density of 0.2g/cc In a nominal

200 cc closed bomb. A minimum of six separate tests shall be

conducted for each lot. Testing shall be In accordance with

MIL-STD-286, Method 801.1 and shall be conducted at 70 + 2F. If

the average of the SIX values obtained falls the requiremetn of 3.4,

the lot of front supports shall be rejected.

4.3.3.4 Crush strength (see 3.5), Major defect, Horizontal

direction Code No. 08001, Vertical direction Code No. 08002. -Lot

sampling for each defect shall in accordance with MIL-STD-414,

Inspection level IV with an AQL of 0.40 percent. Crush strength

in each direction shall be determined in accordance with ASTM-D-1621.

If either sample fails the acceptance criteria, the lot shall be

rejected (see 6.6).

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