M1 (Nose Inertia Type)

Bombs

Functioning

Armed condition

Fuzes used with

Arming time

Body diameter, inches

Over-all length, inches

Material

Die-cast aluminum and steel

General: The Nose Fuze M1 is screwed into the side of the nose of the Bomb AN-M69. When assembled, the two arrows on the top of the fuze cast must be parallel to the longitudinal center-line and point aft. This is necessary in order that the fuze will fire on nose impact. The fuze consists of five main parts; namely, a die-cast aluminum fuze base, a striker of the same material, a primer cap, a lead-coated spitter fuse (60% black-powder - 40% collodion) and a booster charge consisting of 1.2 grams of black powder. The booster cup is a transparent nitro-cellulose composition. The entire fuze as-sembly is contained in a cover of steel tubing. A safety plunger prevents the striker from detonating the primer cap while the bomb is clustered.

Operation: Upon release from the cluster, the spring-loaded fuze safety plunger in each bomb moves outward, thereby arming the fuze. Upon impact, the momentum of the striker carries it forward and causes the striker pin to detonate the primer cap, which in turn, ignites the lead-coated spitter fuse. The latter requires from three to five seconds to burn. The spitter fuse ignites the booster charge of black powder contained in a cellu-loid cup in the end of the fuze case. This ignites the igniter-ejector charge of black pow-der and oiled magnesium powder in the nose cup of the bomb.

Remarks: See figure 306, Bomb AN-M69, showing the Fuze M1 assembled in the bomb.

Figure 323. Nose Inertia Fuze M1