Bombs used in

Fuzed used with

Material of construction

Brass arming spindle and sleeve. Remainder is aluminum alloy.

Over-all length

Over-all length of vanes

Width of fuze body

The cylindrical body has external threads beneath the shoulder which into the nose-fuze pocket of the bomb. The vanes are attached to a vane hub. Set screws in the hub, which ride in an annular groove in the body, prevent the vanes from coming off in flight. Above the vane cup is a dome-shaped cup threaded to the arming spindle, which in turn threaded at the top with the vane hub. The firing mechanism consists of a detonator holder with two caps, an inertia striker with two firing pins, and a creep spring set bet-ween the detonator cap and the striker. The base of the fuze is threaded to receive the long-type booster.

The safety pin is removed when the bomb is released. The vanes rotate in flight but do no come off because of the set screws. The arming spindle, being threaded to the vane hub, rises in the channel. When the arming spindle passes the steel balls, they fall inside the channel and the striker and detonator cap are freed. Only the creep spring keeps the firing pins and primers apart. Upon impact, the detonator holder overcomes the creep spring and contacts the firing pins to detonate the bomb.

Figure 48
Type R - Mechanical Impact Nose Fuze