Technical Specifications

Electronic block for Multirole Digital Proximity and PD Fuze inductive setting & battery for 80mm – 15mm Gun Ammunition

HoB 3m-32m

Φ35mm H- 15mm
Design guidelines MIL-STD-1316D, STANAG 4187 and MIL-STD-331B

Dimensions including battery Φ35mm H- 15mm

Total Weight

40 g

Built-in battery

15 years warrantee MIL-STD 810G

10 g weight

Operating temperature range.  -40 °C ÷ +85 °C

Storage temperature range      -55 °C ÷ +85 °C

Oven at            +150 °C

Acceleration    50,000 gn

Spinning          30,000 rpm

Option – other Power source

4V – 30V

Passive consumption

100 mW

Consumption in radar active mode

700 mW

Frequency range

K-Band

Modulation

FMCW

Antenna diagram

90 degree sector

Measuring range

3-32 m over following conditions:

  • Approach Velocity from 0,4-1000 m/sec
  • Approach Angles from 15° to 90° from horizontal
  • Target Reflectivity range +5,5dB to -17 dB

Target surfaces Reflectivity

+5,5dB to -17 dB
  • Soil (Wet and Dry)
  • Water
  • Concrete
  • Forest (Dense Foliage)
  • Desert sand

ALL WEATHER CONDITIONS:
  • Rain
  • Fog
  • Hurricane
  • Heavy snow
  • Forest leaves

Min programmable range

3 m

Max programmable range

32 m

Measurement period (Scan rate)

300  micro seconds

Accuracy at  1000 m/sec

1 m

Jamming resistance

Encoded digital signal with frequency hopping

Remote inductive programming

From 10 cm

Built-in 3D accelerometer

Output data rate

Sensitivity

100/200 or 300 g,

 1 KHz,

780 mg/digit

Dual safety for STANAG 4187 compliance 

Built-in 2nd safety mechanical Set back key > 20 g

Number of inputs

8

Output 1

Fuze arming at safety barrel distance (delay programmable)

Output 2

Burst (delay programmable)

Output 3

Warhead separation (programmable)

Output 4

Parachute (programmable)

Maximum output current

3.5 A @ 3.5V

Number of Timers

8 pcs

Set time

± 0.01 sec

Time accuracy

± 4 nano sec

Max Time

200 sec

Fuze Arming Time

Programmable. 1,5 sec from launch time

Fuze Safety Distance

Programmable

PD back up

In case of failure of Proximity

Fire support mode

Regular artillery

Mortar bombs 80mm, 120mm

122mm Grad missiles , 128mm missiles

220 mm  9K57 Uragan missiles

Ship artillery - shore bombardment

Aviation bombs (OFAB, Mk82/84)

Anty Aircraft (full radar mode)

Immunity to interferences and clutter- No early burst
  • Digital radar filters,
  • Radar sensor activation at preset time AFTER the maximum height is reached (top of the trajectory zero g)

OPERATING MODES
  • Radar sensor activation after a preset time period
  • Radar activation at preset time AFTER the maximum height is reached (top of the trajectory).
  • Radar sensor activation at preset height (the 3D accelerometer determines the trajectory)
  • Point Detonating SQ mode (electronic)
  • Timer burst after a preset time period
  • Timer burst at preset time period AFTER the maximum height is reached (top of the trajectory).
  • Timer burst at preset height (the 3D accelerometer determines the trajectory)
  • Airburst mode with in real time inductive fuze setting(optional)

Integration of all functions in a standard fuze volume

  • K band RF-Sensor, 
  • Programming coil, 
  • RF receiver,
  • Battery,
  • Signal processing and power supply
  • Programming and fuzing electronics, 
  • IM S&A Unit
  • IM explosive train

Option to use Li-Ion battery,  Supercapacitor, thermal battery, fan, piezo.

Possibility to program other functions of inputs and outputs.

MRV-U is a mechanical, nose, point-detonating fuze with selectable super-quick or delayed action. The fuze features distant arming.

The fuze MRV-U completes 122 mm High Explosive artillery rocket M-210F, launched from BM-21 “GRAD” Multiple Launch Rocket System.

The fuze is safe in storage, handling and operation and ensures the safe and reliable function of the ammunition in all weather conditions.

OPERATION MODES

The fuze has threee modes, witch are selectable. by built-in setter and wrench:                           position “O” for SQ action                                                                                                                         position “M” for shtort-delayed action                                                                                                 position “E” for long-delayed action 

FUZE SAFETY

Before bring the Safety and Arm device prevents the ignitor from positioning into the fire train. Even in case of unintentional ignition of the primer, no transfer of the firing pulse to the fire train can occur.

DISTANT ARMING

The fuze is armed by the set back forces and after burning of the rocket propellant.

FUZE ACTION

The fuze functions under the impact and inertia forces. The inertia device ensures ignition not only upon impact on solid ground, but also on snow or marshy ground.

Upon impact the fuze provides SQ, long-delayed or short-delayed actions. The delayed actions are provided by two different pyrotechnic elements that ensure 0.001 to 0.005 s for short delay and 0.007 to 0.013 s for long delay.

TECHNICAL DATA

 

Length of Fuze (max): 190... 194 mm

Intrusion Length (max):

54 mm

External Diameter (max):

64 mm

Weight of Fuze:

740 g

Type of Booster Pellet:

A-IX-1

Weight of Booster Pellet:

23.2 g

Thread Size:

Spec. 44.96 x 2 tpi

Action:

PD; SQ or delayed

Arming:

distant, by set-back forces

Range of Arming:

after burning of the rocket propellant

Time of Delay:

Short delay:

0.001 to 0.005 s

Long delay:

0.007 to 0.013 s

Temperature Range for Firing:

-40 to +50°C

Temperature Range for Storage:

-40 to +50cC

Shelf Life:

1 5 years