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Ordnance, Explosives, and Related Items

 

1566-152

Description

This tail fuze is an inertial type consisting of a fuze body assembly, arming assembly, flexible shaft, and arming vane assembly. The cylindrical fuze body is threaded externally for assembly to the fuze adapter of GP bomb M117. The end of the fuze body which enters the adapter is threaded internally to receive primer-detonator M14. An arming-stem tube extends from the opposite end of the fuze body and is assembled to form a part of the fuze body assembly. The M190 is similar to fuzes M905 and M906 in that it utilizes a flexible drive shaft which connects the arming mechanism to the arming stem. The arming mechanism is mounted on the side of the fin cone of tail fin M131 on GP bomb M117.

Functioning

When the fuzed bomb is dropped, the arming wire is retained in the bomb rack and withdrawn from the fuze. This frees the arming vane which rotates in the airstream turning the flexible shaft, which turns the arming stem and arms the fuze.

The arming action, detonation, and safe release of this fuze is the same as with fuzes of the M160 series except that a greater number of revolutions of the arming vane are required to accomplish fuze arming.

Hazardous Components

Primer detonator M14

See Also

Bomb, 750 lb GP, M117

Source(s)

MIL-HDBK-146, Fuze Catalog (1982)

TM 9-1385-51, Ammunition (Conventional) for Explosive Ordnance Disposal (1967)

TM 9-1325-200, Bombs and Bomb Components (1966)