Bombs used in

Fuzes used with

Material of construction

Over-all length

Over-all length of vanes

Width of fuze body

The fuze is similar in appearance to Type R. The fuze body is made in two parts: the lower part made of steel and inclosing the twin detonator caps with internal threads to receive the booster and booster lead-ins; the upper part of the fuze body housing the striker assembly and having a flange above the threads by which the fuze is secured in the bomb. The striker is immobilized by a shear washer and two steel balls located in the channel of the striker and a redess in the body. The arming spindle, which is attached to the arming vanes, prevents the movement of balls until the vanes and cover have rota-ted to withdraw the spindle past the balls.

When the bomb falls from the plane, a safety pin which passes through cap and upper part of the fuze is removed, permitting the vanes to rotate and the arming spindle to rise in the striker assembly. When the arming has moved past, the balls roll inward, freeing the striker except for the shear washer. On impact, the head of the striker assembly acts as an anvil and the whole assembly is driven back, shearing the washers, and the firing pins fire the detonators, which in turn fires the explosive train.

Figure 44
Type J - Mechanical Impact Nose Fuze