Description
The body of the fuze contains the plunger and the plunger post which is fitted to the plunger by a shear pin. The striker is attached by a hinge pin to the plunger. The primer-magazine unit is held to the body by upsetting the end inward. While this is not a centrifugally .actuated fuze, the firing pin is not aligned with the primer until after setback and cannot be so aligned until the plunger has moved relative to the plunger post.
Base Ignition Fuze Mk 8 Mod 4 differs from Mod 5 only in that it has the longer body with the integral external tracer assembly.
Functioning
The fuze is assembled with the plunger in the forward position and the striker rotated on the hinge pin, which fastens the striker to the plunger so that it is not aligned with the primer. The force of set-back cuts the shear pin, allowing the plunger to ride back on the plunger post. This motion carries the striker, which straightens out as it enters the recess in the end of the plunger post and then points at the primer cap. On impact the plunger and plunger post go forward together and fire the primer, which ignites the magazine.
Hazardous Components
No information about hazardous components.
See Also
Nothing else to see.
Source(s)
MIL-HDBK-146, Fuze Catalog (1982)
OP 1664, Volume 1 - US Explosive Ordnance (1947)
