MIL-DTL-44050B
b. The stitching shall be 9 stitches ± 1 stitch per inch.
c. The Seam type shall be SSa-1 in accordance with ASTM D6193.
d. The stitch type shall be 301 in accordance with ASTM D6193
4.5.6 Ballistic resistance V50 procedure. The ballistic resistance test for Type I, Type II, Type
III, Type IV, and Type V cloth shall be conducted in accordance with MIL-STD-662 with the
following exceptions:
a. The fragment-simulating projectile. The test projectile shall be the 22 caliber
fragment-simulating projectile as specified in MIL-DTL-46593 except the fragment-
simulating projectile weight shall be 17 grains ± 0.25 grains and the configuration of the
fragment-simulating projectile shall conform to Figure 1 of this document for body armor
in lieu of Figure l of MIL-DTL-46593A.
b. Barrel. The barrel shall be a .30 caliber rifled barrel with a one-in-sixteen twist. The
barrel length shall be 28 inches. The barrel shall be chambered to accommodate firing
the specified sabot as specified in the solicitation and/or contract (see 6.2).
c. Yaw card measurement system. A yaw card shall be used to determine yaw. The
following procedure shall be employed.
1. Place the yaw card directly in front of the test sample with the emulsion side facing
the sample. (The yaw card shall be devoid of any markings. Kodak photographic
paper, single weight, Kodabromide, or equal may be used for the yaw card.)
2. After the test, carefully measure the yaw card to determine the largest dimension of
the hole caused by penetration of the projectile. An optical magnification device
with a magnification between 5X and 10X shall be used for making this
measurement.
3. The firing shall be considered invalid if the determined degree of yaw is more than
5 degrees.
d. Test sample mount. The armor test sample shall be secured with impact sites
perpendicular to the line-of-flight of the projectile. The frame supports and clamps or
mounting fixtures must be capable of retaining the sample and withstanding shock
resulting from ballistic impact by the test projectiles. The frame support shall have a flat
surface without teeth. The test sample mount shall be capable of adjustment for moving
the sample in the vertical or horizontal directions so that the point of impact can be
located anywhere on the sample, and rotation on the vertical axis so that zero degree
obliquity impacts can be achieved anywhere on the sample. The test sample mount shall
be able to rotate on the vertical or horizontal axis so that various obliquity attack angles
can be achieved. The test samples shall be mounted with rigidity equal to or greater than
the actual installation of the part. The test panel shall be mounted between an inner and
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