MECHANICAL FUZES
M904E2/E3/E4 MECHANICAL IMPACT
NOSE FUZE
LEARNING OBJECTIVE: Identify the
various types of mechanical fuzes to include
their physical description and functional
operation.
There are many fuzes in use by the Navy
today. Some of the commonly used fuzes are
discussed in this TRAMAN. To keep up with current
fuzes, you should refer to Aircraft Bombs, Fuzes, and
Associated Components, NAVAIR 11-5A-17, and
Airborne Bomb and Rocket Fuze Manual, NAVAIR
11-1F-2.
The M904 (series) fuze (fig. 1-1) is a mechanical
impact nose fuze used in the Mk 80 (series) low-drag
general-purpose (LDGP) bombs. The M904 (series)
fuze is installed in the nose fuze well of the bomb and
requires the use of an adapter booster. The fuze is
detonator-safe, and it contains two observation windows
through which you can determine the safe/arm condition
of the fuze. There is no special locking feature designed
into the fuze for shear safety if the bomb is accidentally
dropped. However, detonation is unlikely if the collar
(forward end of the fuze) is sheared off by the accidental
drop before arming is complete.
Figure 1-1—Mechanical impact nose fuze M904 (series).
1-3
