The MR742 Electronic Time Mortar Fuze is highly accurate
and reliable. Compatible with a wide range of calibers,
the MR742 has a simple, inductive time setting.
Back
ResheFuze MR742
Mortar Electronic Time Fuze
TECHNICAL SPECIFICATIONS
Open All
COMPATIBILITY
60mm, 81mm, 120mm mortar bombs, at all charges, muzzle
and terminal velocities. Expelling mode - for smoke, illuminating.
OPERATION MODES
Time delay, point detonating.
Electromechanical impact back-up.
TIME DELAY SETTING
3.0 to 99.8 seconds x 0.1 second increments.
SETTING SYSTEM
Inductive setting system by a fuze setter ST742, using inductive
technology. Unlimited setting storage time.
ACCURACY
Better than 0.1 seconds.
Standard deviation time delay, less than 0.1 seconds.
POWER SUPPLY
Air driven alternator.
ARMING
By two environmental signatures:
Set back force: Acceleration of 400g minimum, for 1 m/sec
duration minimum.
Sustained air flow: 30 m/sec minimum.
BACK-UP
N\A
FUZE INITIATION
N\A
SAFETY
Miss-sequencing: Prevents arming whenever “air flow”
arming conditions precede “set-back”
arming conditions.
Arming Distance: 100m from muzzle.
Double loading: The fuze will not function in bore at a double
loading event.
Shorted Electric
Detonator:
The electric detonator is shortened
until arming.
Safety pull wire: No use of safety pull wire.
HUMAN ENGINEERING
N\A
EXPLOSIVE OUTPUT
3g black powder.
TEMPERATURE LIMITS
Operation: From -40°c to +63°c
Storage: From -46°c to +71°c
PHYSICAL DESCRIPTION
Overall length: 94.8mm
Intrustion size: 27.5mm
Cross section diameter: 49.3mm
Standard thread size: 1.5"-12 UNF-1A
Weight: 0.3kg
MILITARY STANDARDS
MIL-STD-331: Environmental and performance tests for fuze
and fuze components.
MIL-STD-333: Fuze, projectile and accessory contours.
MIL-STD-1316: Fuze design, safety criteria.
STANAG 4187: Fuzing system - safety design requirements.
HEIGHT OF BURST
N\A
IMMUNITY
N\A
POINT DETONATING
Settable, when 99.9 seconds setting is selected.
Super quick function.
Mortar Electronic Reshef Fuzes
