BOMBS USED IN

FUNCTIONING

ARMED CONDITION

ARMING TIME

FUZES USED WITH

MAX. BODY DIAMETER

VANE SPAN

OVERALL LENGTH

COLOR

DESCRIPTION:

The vanes and vane cap are cast together, there being 5 vanes. The vanes are sta-ked to a threaded collar which fits down into the fuze body and threads onto a striker extension collar. A closing screw with a vertically flattened head closes the upper end of the collar. A plastic upper body is incorporated to prevent permature firing due to collision of the bombs with each other in the air. Inside this plastic upper body, project-ing through the brass collar, are three plastic firing pin extensions through which pass a copper shear wire. A fourth projects up through the center of the striker extension col-lar. A detent, spring-loaded up, comes up beside the striker extension collar, and while in the unarmed position is held down by the threaded collar of the vane cap. It holds the spring loaded detonator shutter out of line. Below the striker extension collar is a circular plate resting on top of the striker, which is held in place by a shear wire. The detonator is carried in a shutter which is out of line with the striker in the unarmed condition. Extending down into the magazone is the booster cup which has a cone in the bottom, giving it a shape charge effect.

OPERATION:

When the bomb is released from the plane, the safety wire is pulled and the vanes are then freed to rotate. After seven revolutions they fall away, allowing the spring-loaded detent to move up out of the way of the detonator shutter which then lines up under the striker. On water impact, the light plastic upper body shear away, exposing the four plastic firing pin extensions. On impact with a hard surface, one or more of these extensions shear their shear pins and bear down against the circular plate, which transmits the pressure ot the striker. The striker shear wire is broken, allowing the striker to be forced into the detonator. The flash from the detonator sets off the boos-ter and magazine, the blast from which is directed into the exploder tube by the cone in the base of the booster.