Bombs used in

Fuzed used with

Over-all length

C

C-1

Over-all length of vanes

Width of fuze body

The C-1 Fuze differs form the C Fuze only in having a longer arming stem case and an opening near the center of the case to permit observation of the progress of arming.

The fuze body is threaded externally to screw into the bomb, and internally to receive the booster. An arming-spindle case is secured to it by a set screw. An inertia striker contains twin firing pins; twin flanges engaging in grooves in the body prevent it from rotating. A creep spring separates the striker and the detonator housing. Two balls are located in the striker and rest against a shoulder of the fuze body. An arming spindle prevents inward movement of the balls while the spindle is in place in its channel in the striker. The arming spindle is secured to a steel tube, in the upper end of which a threaded brass collar receives the arming screw. A pin through the case prevents the tube from rotating. The upper end of the arming screw is threaded into a brass collar to which vanes are secured by a pin. A U-shaped pin engages in the annular slot to prevent the rise of the vanes on rotation. A safety pin passes through the arming-stem case and collar.

The safety pin is removed, allowing the vanes to rotate when the bomb is dropped. As the arming screw rotates, the steel tube rises on the screw. When the arming spindle moves past, the steel balls can move in and free the striker. On impact, the striker com-presses the creep spring, and the firing pins hit the detonators.

Figure 51
Type C and C-1 - Mechanical Impact Tail Fuzes