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US Cartridge, 25.4 mm Decoy, M839

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1507-298

Description

The cartridge is a decoy to provide an effective survival counter-measure for Army aircraft against radar controlled weapon systems.

The cartridge is ammunition item consisting of a plastic outer case nominally 1-inch wide x 1-inch high x 8 inches long, a payload made up of approximately 390,000 strands of aluminum coated glass fibers. The payload is sectioned into several bundles of chaff dipoles. There are three different lengths of bundles in the payload. In addition, the item contains a plastic end cap, plastic piston, felt spacer, and impulse cartridge.

Functioning

The cartridge is fired by electrical initiation of the impulse cartridge M796. The gases generated by the functioned impulse cartridge causes the piston to expel the chaff payload into the air where it blooms into a radar reflecting cloud that breaks "Lock On" by radar controlled weapon systems.

See Also

Nothing else to see.

Source(s)

TM 43-0001-27, Small Caliber Ammunition (chg 7, 2004)