Cartridge Millimeter Illuminating M With Fuze Mechanical Time Superquick M

120mm Ammo Image

Type Classification:

(To be assigned).

Use:

This cartridge is used for illuminating a desired point or area. This cartridge is for &e in the M-120 120mm mortar system only.

Description:

The complete round consists of a steel body and tail cone assembly an illuminant candle and parachute assembly a time fuze with a built-in expelling charge, a fin assembly propel-lant charge, and an ignition cartridge with percussion primer. The nose of the thin walled steel tubing body is fitted with a steel adapter and internally threaded to accept the fin assembly, and is attached to the body tube with eight equally spaced shear pins. The illuminant assembly consisting of a first-fire charge and an illuminant charge, is contained in an aluminum case and attached to the parachute with a fiberglass suspension line.

Functioning:

When the cartridge is dropped down the mortar tube, the firing pin at the bottom of the tube initiates the percussion primer and charge in the ignition cartridge. The charge in the ignition cartridge flashes through the holes in the shaft of the fin assembly and ignites the propelling charge. The gases from the burning propel-lant expand and propel the cartridge out of the mortar tube. The fuze functions at a height of burst according to its time setting expelling and igniting the candle which is deployed on a parachute and provides illumination for 50 seconds.

Tabulated Data:

Complete Round:

Type ----------------------------------Illuminating

Assembly drawing number --- 512-0068-03

Projectile:

Color---------------------------------White w/black markings

Components:

Fuze--------------------------------------- MTSQ, M776

Propellant charge max--------- 1 brown increment, 2 blue increments, 4 white increments

Candlepower 1,000,000 candle power/sec Burning time------------------- 50 sec

*Packing --------------------- 1 round per fiber container; 2 containers per wooden box

Ammo container:

Box:

*NOTE: See DOD Consolidated Ammunition Catalog for complete packing data including NSN's.

Temperature Limits:

Firing

Upper Limit------------------------------------+145°F

Storage:

Upper limit +145F

Shipping and storage Data:

Storage compatibility group-----G

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