BOMBS USED IN

FUNCTIONING

ARMED CONDITION

ARMING TIME

MAX. BODY DIAMETER

OVERALL LENGTH

COLOR

DESCRIPTION:

The fuze consists of a vane assembly, throat and upper fuze body, and lower fuze body and base piece. There are 10 smll vanes of sheet steel which are attached to the vane hub to which is also attached the arming spindle. Around the vanes is a ring sold-ered to three clips to prevent damaging the vanes and to hold the vane cap on. The spindle threads down into the throat and holds down a brass retaining cap. The retain-ing cap holds two retaining balls in grooves in the upper part of the striker which is spring-loaded down. Through the throat and the strker passes a safety pin. In the lower part of the throat is the primer, which flashes down to a delay train housed in the lower fuze body. To the lower fuze body is screwed the base piece housing the maga-zine.

OPERATION:

When the flare is put in the plane the safety is removed. Upon release the vane cap is pulled off and the vanes are free to rotate, threading the spindle out of the throat. When the spindle has moved out, the retaining cap falls forward under pressure from the retaining balls, releasing the two retaining balls and allowing the striker to hit the primer. The primer fires the delay train, which burns out and flashes down to the maga-zine firing the fuze.

REMARKS:

(1) The delays, housed in capsules, vary from 4.0 to 32.5 seconds, depending on the capsule used.

(2) The Mk IV differs from the Mk V in that instead of the arming spindle holding down the retaining cap, it has an arming cone which moves down inside a ball cage and holds the retaining ball out, preventing the ball cage and spring loaded striker from moving down.