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GENERAL:
The M797 is an Electronic Point Detonating fuze (EPD) with the option of selecting a delay mode (D). This highly reliable fuze, utilizes two independent mechanisms for arming the fuze and does not consist of a safety pull wire.
COMPATIBILITY
To be used with alltypes of He and WP mortar bombs of calibers : 60 mm (of improved Ballistic design), 81 mm, 82 mm, 120 mm and 160 mm.
Interchangeable with the following fuzes: DM 111A2/A3/A4, M525, M734, M935, V19P, and with an adaptor - M567, M526
OPERATION MODES:
Point detonating (PD) - detonates warhead on impact with target.
Delay (D) - detonates warhead after 50 milliseconds from impact with target.
ARMING:
Fuze arming (when the explosive elements are in one detonating line) is done by two arming mechanisms:
Set back forces
Sustained air flow
SAFETY:
Set back - Acceleration of 400 g minimum, for a duration of 1 millisecond minimum.
Air speed - of 30 m/s minimum.
Missequencing - This mechanism prevents arming the fuze whenever arming condition of "air flow" precedes arming condition of "set back".
Fail safe mechanism - Self-lock system in safe position, whenever missequencing occurs, without external arming possibility.
Arming distance - 70 m minimum from muzzle.
Double loading - the fuze willnot function in bore in a double loading event.
Shorted detonator - the electronic detonator is shorted until arming.
Safety pull wire - No use of safety pull wire.
POWER SUPPLY:
Air driven (turbine) alternator.
EXPLOSIVE OUTPUT:
7gr of CH-6 booster pellet.
TEMPERATURE LIMITS
For firing: from -40c to 63c.
For storage: from -40c to 71c.
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PHYSICAL DESCRIPTION:
Total length - 95.1 mm
Intrustion depth - 28.4 mm
Cross section diameter - 51.1 mm.
Standard thread size - 1.5" -12 UNF-1A, 2"-12UNS-1A, 35.7-Pas 200 (can be changed according to customer's request).
Weight - 0.275kg.
MILITARY STANDARDS:
MIL-STD-331B - Environmental and performing tests for fuze and fuze components.
MIL-STD-333A - Fuze,projectile and accessory contours.
MIL-STD-1316D - Fuze design, safety criteria.
STANAG-4187 - Fuzing system - safety design requirements.
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