See Appendix A . Fuzes Fuzes used to initiate bombs are either mechanical or electrical, They are generally placed in the nose or tail section, internally or externally. The fuzes may not always be visible, as they are often covered by the fin assembly. Mechanical fuzing, whether in the nose or in the tail, is generally armed by some type of arming vane as shown in Figure 2-4 . The arming vane assembly operates like a propeller to line up all of the fuze parts so the fuze will become armed.
Electrical fuzes have an electric charging assembly in place of an arming vane.
They are armed by using power from the aircraft. Just before the pilot releases the bomb, the aircraft supplies the required electrical charge to the bomb s fuze. Action of the fuze may be impact, proximity, or delay. Impact fuzes function when they hit the target. Proximity fuzes function when bombs reach a predetermined height above the target.