The Analysis on the Requirements of the Muzzle Safety of a Projectile Fuze

The muzzle safety of a projectile fuze is an important safe performance, so its designing requirements are widely given one's attention to. The safe separation of a projectile is analyzed from both explosion shocks and fragment killability respectively and the requirements of the muzzle safety of a projectile fuze are discussed according to the requirements on the arming delay in 《Safety Criteria for Fuze Design》 by using ballistics, explosion dynamics and power design theory. And the design requirements of the muzzle safe distance of the projectile fuze are concerned with not only the power of the projectile, but also its muzzle velocity. The property of the projectile affecting the requirements of the muzzle safety of the projectile fuze mainly is fragment killing function. For the high explosive projectiles for a medium and large caliber artillery and ones for a small caliber naval gun and a small caliber antiaircraft gun, the muzzle safe distance of their fuze can be determined by caliber 400 times. For some high explosive projectiles for an aircraft gun, whose muzzle velocity is lower and whose explosive charge quantity is greater, the muzzle safe distance of their fuze should be a bit farther (15 m or even 50 m) from the point of view of operation requirements. In general, the muzzle safe distance of a base fuze should be shorter than that of a point fuze.