Description
Brass except steel spring and striker and copper shear wire and nose cap.
Screwed into nose. Secured by a grub screw.
The steel striker is held in the brass body by a soft copper shear wire. A spring is positioned between the striker and the movable primer carrier. The vane hub screws down on the portion of the striker that extends above the fuze body. A locking screw in the top of the striker prevents the vane assembly from falling away.
The fuze is armed after 4 1/2 turns of the vanes.
Even though the fuze is unarmed, it may function if dropped a short distance on a hard surface. This is due to the fact that the primer carrier will move against the light creep spring towards the striker.
Functioning
The vanes rotate, screwing the vane assembly to the top of the striker where it is stopped by the locking screw head. The fuze is now armed. On impact the shear wire is broken and the striker is driven inward. Simultaneously, the movable primer carrier moves forward against the spring until the firing pin pierces the primer.
The fuze is armed after 4 1/2 turns of the vanes.
Hazardous Components
Components of explosive train: Primer flash cap, two relay pellets of black powder, cyclonite booster with lead azide detonator.
Physical Data
Length, overall - 1.45 in (36.8 mm)
Length, overall (with gaine) - 2.5 in (63.5 mm)
Width, overall - 1 in (25.4 mm)
Vane span - 1.5 in (38.1 mm)
See Also
Source(s)
OP 1667, Japanese Explosive Ordnance, Volume 1 (1946)
USNBD - Japanese Bombs & Fuzes (1944)
TM-E9-1984, Enemy Bombs and Fuzes, Section VII, Japanese Fuzes (1942)
