Fuze MK399 MOD 1
Contents
MK399 MOD 1 PD Impact Fuze
MK399 MOD 1 is a mechanical artillery fuze with impact and delayed-impact functions. It is designed for use with 155 mm high-explosive fragmentation artillery projectiles.
Fuze arming is initiated by inertial and rotational forces at a safe distance from the muzzle. The striker and the detonator, located in the nose section, provide instantaneous action on impact (PD). The delay device with an inertia striker is located at the rear of the fuze and delays functioning of the fuze by 0.009 s.
Technical specifications
Fuze with impact and delayed-impact functions.
- fuze weight: - 0.45 kg;
- arming into the combat position: after 60 m, at a velocity of at least 472 m/s
- delayed-action burst (DELAY): 0.009 s
- temperature range: from -40 to +70°C.
- length: - 152.4 mm
Usage notes
Do not use in heavy rain.
Fuze Setting
Setting the fuze:
The fuze is screwed into the fuze socket of the projectile and tightened with a wrench.
To set the fuze:
- for impact action, the (PD) position is the default position; check that the fuze indicator points to PD. If not, use the wrench or a flat screwdriver to turn the plunger slot to the “PD” position;
- for impact action with delay: use a special wrench or a flat screwdriver to turn the plunger slot to the “DELAY” position.
Oleh Syrota (Georgich©) for the Armed Forces of Ukraine / Entropia.com.ua
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