Bombs used in

Fuze used with

Over-all length

Over-all length of vanes

Width of body

The fuze body is made of aluminum alloy and is threaded at the lover end to take the standard booster. The fuze head, which carries the four strikers and detonators, screws on the body and is protected by the vaned cap. A hole off center, passing through the shoulder and through the fuze body, takes a safety pin to retain the cap. The head of the fuze has a longitudinal slot in which one arm of the safety bolt is accommodated. The other arm, made of brass, passes through the fuze body and blanks off the flash channel leading to the booster. Four slots for the striker mechanism are equally spaced on the domed head. The striker itself three equispaced small projections which rest on the shoulder of the slot. The striker also has a small shear wire resting on the detona-tor's spring. The whole mechanism is similar to the French R.S.A. mechanism, except that the three projections replace the usual shear wire.

As the bomb is released, the safety pin is withdrawn, allowing the vanes to rotate. The caps thread up and fall away. The safety bolt is then rejected, clearing the flash chan-nel. On impact, one or more of the strikers will be forced inwards. The projections usually break off, and at the same time the fine wire is also sheared. The detonator then is for-ced into the striker. The flash travels through the flash channel to the booster.

Figure 70
Mechanical Impact Nose Fuze - "Ophran"