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122mm OGANJ 2000 ER SELF-PROPELLED 50-BARRELS LAUNCH ROCKET SYSTEM (MLRS)

INTRODUCTION

 

The 122 mm Self-Propelled Multiple Launch Rocket System with 50 tubes mounted on a cross country vehicle with all-wheel drive (8x8) is intended for forceful, unexpected and rapid high density fire strikes against enemy troops and non-armoured equipment at ranges up to 40 km.

The weapon features high firepower, long range, high operational and tactical mobility, short marching to fire position and transition time, short firing time and fast going out of firing position, these elements representing basic requirements of modern warfare and fire support to army units.

Standard version has fully automated aiming procedure  in terms of its mechanisms for laying in elevation, traverse, legs and loading with spare rockets accommodated in the vehicle. In addition to the basic automatic electro-drive, it also has an auxiliary manual drive capability.

The system is equipped with inertial navigation system (INS) and GPS unit for automatic positioning, with electronic sensors, automation control unit, electronic trigger and a computer unit for firing elements correction due to ground inclination.

The system possesses smoke grenades launchers.

 

BASIC TACTICAL AND TECHNICAL FEATURES OF MLRS

 

  • Vehicle           

Cross-country vehicle with all-wheel drive (8х8) , with central tire pressure regulation control from the vehicle cabin.

  • Calibre                                                122 mm
  • Number of tubes                                 50
  • Time of going out of position                         60 s
  • Maximum speed                                 90 km/h
  • Total weapon mass with full-load (100 rockets) and loader 22 t
  • Length                                     10675 m
  • Width                                      2500 mm
  • Height                                     3200 mm
  • Water draught                                    1.75 m
  • Clearance                                            0.385 m
  • Survivability                                        Smoke grenade launchers
  • The launching tubes provide for:

-          Rocket locking in transport

-          Electrical starting of the rocket motor

  • Operating temperature range                       -30  0 C to +50 0 C
  • Field of action:

- In elevation                           up to 58 0

- In traverse                            +/- 1100 from basic position relative to the vehicle longitudinal axis. 

  • Launcher laying:

- In traverse and elevation     Automatic laying (electro - system) and auxiliary semiautomatic and manual drive.

  • Angular laying speed in automatic mode in elevation and traverse             3-5 0/s
  • Combat set      100 rockets (50 rockets in the launcher and 50 rockets as a spare combat load )
  • Loading from the spare combat load             Automatic, from the cabin and manual
  • The crew consists of 3 members        Accommodated in the vehicle cabin
  • Corrections due to ground inclination effect

         In the transversal plane +/-5 0 and in the longitudinal plane +/-5 0,  

            By automatic correction of the preset traverse and elevation angles (by means of built-in electronic sensors and cabin computer) , and auxiliary manually  by an oscillating sighting device

  • Weapon stability in firing mode achieved with four legs. Leg actuating mechanisms are automatic and auxiliary  manual semiautomatic and manual drive.

LAUNCHER CONTROL SYSTEM CONSISTS OF:

  • Launcher control computer (LCC)
  • Microcontrollers to control drives, position limits, protected fields of operation and fire
  • Electromechanical drives – servo systems for- directional positioning of launching platform

    - elevation positioning of launching platform

    - support legs deployment/retracting

    - cover opening and closing

    - meteo sensor opening and closing

  • Vehicle level determination system
  • Fire Control Unit
  • Manual Control Unit

FIRE CONTROL UNIT (FIRING DEVICE)

Electronic trigger accommodated in the vehicle cabin provides for:

  • Single or burst fire
  • Fire blocking in no authorized launcher positions secured by electronic and mechanical safety
  • Firing from the cabin or the shelter with 40m cable
  • Rocket number selection
  • Fire rate selection
  • Checking of firing circuit
  • Default firing program option
  • Automatic rocket identification
  • Single/ ripple mode operation
  • Remote firing unit (support)
  • Firing of smoke unit

 

  • MANUAL (auxiliary)LAUNCHER CONTROL UNIT
  • Semiautomatic mode enable manual control of:
  • Opening/closing meteo sound
  • Lowering/lifting supporting legs
  • Opening/covering awening cover
  • Positioning launching platform per azimuth/elevation angles

 

  • VEHICLE LEVEL DETERMINATION SYSTEM
  • Consists of two axis inclinometer, software and interface.
  • Feature:
  • Pitch (longitudinal) and roll (transversal) vehicle angles measurement; accuracy 0.5 mils
  • Automatic correction of elevation and azimuth of the launching platform due to vehicle inclination.

 

  • AUTOMATIC AWNING COVER
  • Automatic, semiautomatic, and manual opening/covering
  • Short time for opening/covering les then 20s
  • Good protection and masking characteristics

   

  • FIRE CONTROL SYSTEM (FCS)
  • Automatic vehicle positioning (navigation to desired point) with aid of INTEGRATED INS & GPS & VMS
  • Firing elements calculation by FIRE CONTROL SOFTWARE taking into account data from METEOROLOGICAL SENSOR
  • Fire control system consists of the following subsystems:
  • Fire control software on System management computer

            Fully rugged computer

Rubber backlit keyboard

            14.1” TFT sunlight readable, touch-screen display

External interface for communications with subsystems

 

  • Integrated INS-GPS-VMS

Inertial Measurement Unit (IMU)

Control & Display Unit (CDU)

Global Positioning system antennas (GPS)

Vehicle motion system (VMS)

 

FUNCTIONS:

            Self orientation (North finding)

Self positioning

Navigation

Aiming azimuth and elevation determination

Displaying data on CDU

 

 

INERTIAL MEASUREMENT UNIT

 

  • Measurement parameters: position, roll, pitch, azimuth
  • True north azimuth accuracy: <0.9mils
  • Measuring position accuracy: <10 m  (distance travelled <4000m)

 

GLOBAL POSITIONING SYSTEM – GPS

 

  • Consists of two antennas and receiver which is connected to CDU interface
  • Outputs position and true north azimuth (accuracy <2 mils)

 

CDU

 

  • Fully rugged PC tablet
  • Specially developed software for control of the INS
  • Dedicated software for navigation and data displaying

VEHICLE MOTION SENSOR - VMS

  • Mounted on the vehicle’s wheel and connected to the interface
  • Outputs vehicle’s travelled distance

 

VEHICLE MOUNTED METEOROLOGICAL SENSOR

Measures:

  • Wind direction and velocity
  • Barometric pressure
  • Ambient temperature

SYSTEM MANAGEMENT SOFTWARE - LCC FUNCTIONS –

 

  • Control and monitoring of the all subsystems (azimuth, elevation,…)
  • System data and status visualization
  • Viewing and control of the launching platform
  • Checking of mechanical limits position
  • Storing the reports

 

FIRE CONTROL SOFTWARE

 

  • Planning and storing of the list of fire tasks/missions.
  • Display of battlefield information on digital map.
  • Checking for crest clearance and protection areas – allied forces.

 

122 MM EXTENDED RANGE ROCKET

 

  • Grad-2000 HE prefragmented warhead, with maximum range up to 40 km.

 

HE prefragmented warhead is two steel balls size type: 6 mm and 10 mm, containing  4000 and 1000 balls, effective against wide range of battlefield targets, including lightly armored and non-armoured vehicles, artillery systems, manpower, AD systems etc.