BOMBS USED IN

FUNCTIONING

ARMED CONDITION

FUZES USED WITH

MAX. BODY DIAMETER

OVERALL LENGTH

COLOR

DESCRIPTION:

The fuze consists of a cylindrical flanged body which is externally threaded to permit the fuze to be screwed into the tail end of a smoke float. A seating washer beneath the flange ensures a water-tight joint between the fuze and the smoke float.

A cover fits over the body and is held in position by a U-shaped securing wire pass-ed through two holes in the cover and an annular groove in the body. The wire does not prevent rotation of the cover, which can be turned for the purpose of adjustment. A base plug screwed into the body supports a detonator holder which is screwed into the base plug. The detonator holder houses a detonator and a gunpowder pellet.

One end of the striker is screwed into a striker head, and a creep spring, which en-gages the striker head and the base plug, holds the striker clear of the detonator. A hole extending through the striker head is aligned with two holes in the cover. A safety pillar screwed into one of the holes in the cover projects into one end of the hole in the striker head, while a safety rod passes through the other hole in the cover and extends into the opposite end of the hole in the striker head. The safety rod is retained in posi-tion by a pull-off spring which is locked between a fork-ended swivel block and a shoulder on the safety rod. A pin passing through the forked end of the swivel block provides an anchorage for a fuze-setting control link.

A whipcord becket, extending round the fuze, passes through the forked end of the swivel block and a hole in the safety pillar.

FUNTIONING:

The fuze is screwed into the tail end of a smoke float end the  fuzed smoke float is loaded on to an airplane bomb carrier, the swivel block being connected to the fuzing unit by a fuze-setting control link. Just before the airplane takes off, the fuze is made live by the removal of the safety pillar.

When the smoke float is released from the carrier, the swivel rod, safety block, and pull-off spring remain attached to the carrier by the fuze-setting control link, so that while the smoke float is falling, the striker is held away from the detonator only by the creep spring.

On ground or water impact the striker moves down, overcoming the creep spring, to pierce the detonator. The detonator fires the gunpowder pellet, and the flash from the gunpowder pellet fires the igniter of the smoke float.