ROCKET USED IN

FUNCTIONING

ARMED CONDITION

FUZES USED WITH

ARMING TIME

VANE GUARD

DIAMETER

OVERALL LENGTH

16.65" (with burster tube)

GENERAL:

This fuze consists of a Mk 137 Mod 2 fuze plus a 14.06" long tetryl burster tube. A steel collar is brazed to the upper end of the tube. A rubber gasket is inserted between the burster tube collar and the burster retaining disc. Between the wall of the burster tube and the inside wall of the burster retaining disc is left a clearance of approximately 0.03". This clearance in addition to the rubber gasket allows the burster tube a certain degree of flexibility which is desirable when installing the complete fuze assembly in the fuze adapter of the rocket body.

OPERATION:

When the rocket is loaded on the launcher, the safety pin securing the setback col-lar is withdrawn. On firing the rocket, the setback collar is forced back by inertia, com-pressing the setback spring and withdrawing the vane locking pin from the hole in the vane boss. The vanes rotate freely, and after 3 to 4 rotations have unthreaded the striker spindle sufficiently that when deceleration occurs the vane locking pin can not again engage the vane boss. After approximately 10 vane rotations, the striker spindle is unthreaded sufficiently to free the detonator shutter, which is forced the shutter ca-vity by its spring. It is stopped by the stop pin and is locked in the armed position by a spring loaded detent housed in the shutter and engaging in a recess in the striker guide. When the striker has reached the end of its threads it rotates freely with the vanes as the striker spindle collar rides in a groove in the underside of the fuze body. On impact, the threads on the fuze body are sheared as the striker is forced into the detonator.

REMAKRS:

No disassembly of this fuze is authorized.