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The BM Oplot main battle tank is a tracked fighting vehicle that features a high firepower, reliable protection and high mobility.

The tank is intended to destroy all types of ground (floating) and low-flying low-speed ait targets under the conditions when the enemy fires back.

The vehicle can fulfil a wide range of combat missions under various climatic, weather and terrain conditions in the ambient temperature range of -40 to +55 degrees Centigrade, air humidity of up to 98% at temperature of +25 degrees Centigrade, height above sea level of up to 3000 m and with ambient air dust content available in real terrain conditions.

The key component parts of the tank that determine its capabilities are as follows:

FIREPOWER:

  • Armament:
    • tank gun
    • coaxial machine gun
    • remote-controlled anti-aircraft machine gun system
  • Loading system:
    • conveyor
    • automatic loader
    • control system
  • Integrated gun-and-fire control system:
    • sighting systems:
      • gunners day sight
      • gunners thermal sight
      • commanders panoramic sighting system
    • main armament stabiliser
    • guided weapon system
    • tank ballistic computer
    • input sensors of tank ballistic computer
    • muzzle reference system
    • anti-aircraft machine gun control system

Oplot Main Battle Tank

Opolt MBT

Opolt MBT

PROTECTION:

  • Ballistic protection:
    • main passive armour protection
    • built-in anti-tandem-warhead explosive reactive armour
    • anti-mine protection
  • Special defensive aids:
    • optronic countermeasures system:
      • optronic suppression station
      • aerosol screen laying system
    • collective crew protection system:
      • NBC protection system
      • fire/explosion suppression system
    • signature reduction aids:
      • dazzle painting
      • natural camouflage fixing devices
      • thermal insulation
      • engine smoke generator
      • set of camouflage nets
  • Self-entrenching device
  • Mine clearing system attachments (attachments available on the vehicle hull and intended for installation of any type of track-width mine clearing system)

Opolt MBT

MOBILITY:

  • Power pack:
    • engine
    • engine operation support systems:
      • fuel supply system
      • air supply system
      • lubrication system
      • cooling system
      • engine exhaust gas outlet system
      • engine pre-heating and crew compartment heating system
      • engine start system

Opolt MBT

  • Multiple reverse speed transmission:
    • gearboxes
    • multiple reverse speed final drives
  • Complex movement control system
  • Running gear:
    • track system
    • cushioning system
  • Deep water fording equipment
  • The tank is also fitted with the following:
    • Observation and orientation devices
      • day vision devices
      • drivers night vision device
      • orientation device (directional gyro)
      • hydro-pneumatic system for cleaning the vision devices of the hull and turret
    • Satellite navigation support system
    • Communications devices
      • VHF radio set
      • commanders HF radio set
      • crew intercom system
  • Auxiliary power unit
  • Vehicles electrical system
  • Drivers digital instrumentation panel
  • Air conditioning system (optional)

Opolt MBT

ARMAMENT

Tank gun

Model
KBA-3
Calibre
125 mm
Breech type
horizontal wedge-type, semi-automatic
Elevation/depression angles (up to rigid stops).
from -4 to +15 degrees
Horizontal aiming (together with the tank turret)
360 degrees
Dispersion:
  • elevation
0.2 mrad (APFSDS, HEAT, R=2000 m)
  • azimuth
0.2 mrad (APFSDS, HEAT, R=2000 m)

Coaxial machine gun

Model
KT-7.62 (PKT) with removing powder gas
Calibre
7.62 mm
Technical rate of fire
700-800 rpm
Anti-aircraft machine gun system

Type
autonomous
Control
remote
Control modes1) automatic
2) stabilised in vertical plane
Armament model
KT-12.7
Calibre
12.7 mm
Ammunition feed
belt-type
Technical rate of fire
700 rpm
Number of cartridges in a belt
150
Max firing range:
  • at air targets
2000 m
  • at ground targets
2000 m
Firing (aiming) angles:
  • elevation
from -3 to 60 degrees
  • azimuth
360 degrees

Opolt MBT

Opolt MBT

LOADING SYSTEM

The loading system is a system intended to automatically load the main gun with ammunition of the available types and consisting of a conveyor, automatic loader and control system.

Type
electric hydraulic mechanical, with fixed loading angle
Number of projectile types
4
Conveyor capacity
28 rds
Conveyor rotation
in both directions
Conveyor rotation speed
25-33 degrees/sec
Loading cycle duration:
  • minimum
7 sec (if the conveyor turns through 1 step)
  • maximum
12.5 sec (if the conveyor terns through 180)
Loading cycle duration if using manual drives of the loading system:
  • if the conveyor turns through 1 step
within 1 minute
  • if the conveyor turns through 14 steps
within 1.6 minutes
Removal of a used cartridge
case stub with placing it into an empty loading tray without damaging air-tightness of the fighting compartment
Round ramming type
tandem-type ramming projectile and charge together) during one cycle
Availability of back-up drives
manual drives of conveyor, manual ammo feed mechanism, manual conveyor lock and manual gun lock
Conveyor replenishment time
(in replenishment mode) 15-20 minutes

Control system of the loading system installed in the tank is intended for:

  • ensuring control over operation of mechanical and hydraulic units of the loading system
  • ensuring control of the firing circuits of the main gun and coaxial machine gun
  • storing information about the rounds placed into the loading system conveyor
Opolt MBT Opolt MBT Opolt MBT
Opolt MBT Diagram of placement of the loading system components in the tank

INTEGRATED GUN-AND-FIRE CONTROL SYSTEM (IGFCS)

The IGFCS ensures the following:

  • automatic generation, with subsequent introduction into the armament control devices, of super-elevation and lateral lead angles, with taking into account various deviations of the real firing conditions from the standard ones
  • possibility for the commander to override the gunner and fire the main gun and coaxial machine gun from the commanders station
  • firing the anti-aircraft machine gun from the commanders station
Readiness time
within 3 minutes
Time required fir preparation of the first shot of the gun:
  • if the tank is stationary
10-12 sec
  • if the tank is on the move
10-15 sec
Gun firing range in all conditions of vehicle operation:
  • APFSDS
at least 2800 m
  • HEAT, HE-FRAG
at least 2600 m

1G46M gunners sight

Type
optical aiming device with two-axis independent stabilisation of the field of view, with laser range-finder and laser channel for missile guidance
Magnification
2.7-12
Field of view
4-20 degrees
Aiming angles of stabilised line of sight:
  • elevation
-15 to +20 degrees
  • azimuth
(81) degrees
  • together with the turret
360 degrees
Speed of aiming of the line of sight:
Elevation:
  • minimum
within 0.05 degrees/sec
  • accurate aiming
from 0.05 to 1 degrees/sec
  • maximum
at least 3 degrees/sec
Azimuth:
  • minimum
within 0.05 degrees/sec
  • accurate aiming
from 0.05 to 1 degrees/sec
  • maximum
at least 3 degrees/sec
Laser range-finder:
  • target ranging limits
400-5000 m
  • measurement error
10 m
Opolt MBT Opolt MBT

PTT-2 thermal sighting system

The system is intended to observe, detect, recognise and identify targets and to deliver aimed fire from the main and coaxial machine gun under all conditions of vehicle operation.

Type
thermal, monocular (with built-in micro-monitor)
Operational spectral wave band
8-12 micrometres
Fields of view:
  • wide field of view
9x6.75 degrees
  • narrow field of view
3x2.25 degrees
  • electronic magnification
1.5x1.12 degrees
Operational ranges:
  • Detection range (narrow field of view)
at least 8000 m
  • Recognition range (narrow field of view)
at least 4500 m
  • Identification range (narrow field of view)
at least 2500 m

Opolt MBT Opolt MBT Opolt MBT
Opolt MBT

PNK-6 panoramic sighting system

The system is intended for:

  • detection, recognition and identification of ground and air targets by day and at night from the tank commanders station
  • target ranging by means of the laser range-finder
  • designation of targets to the gunner
  • firing the main gun and the coaxial machine gun from the commanders station in the override more
  • firing the anti-aircraft machine gun

Technical characteristics

Field-of-view stabilisation
independent, in two axes
Aiming angles of the stabilised line of sight:
  • depression
at least 15 degrees
  • elevation
at least 60 degrees
  • traverse
360xn degrees
Magnification of the day vision channel
1.2; 6; 12
Field of view of the day vision channel
30; 10; 5.5 degrees
Field of view of thermal channel:
    li>wide field of view
9x6.75 degrees
  • narrow field of view
3x2.25 degrees
  • electronic magnification
1.5x1.12 degrees
Spectral range of the thermal camera
8-12 micrometres
Range of detection of a TANK-type target:
  • through the visual channel
at least 5500 m
  • through the thermal channel in the narrow field of view
at least 8000 m
Target ranging limits
200-9500 m
Mean square error of target ranging by the laser range-finder
within 5 m

Opolt MBT

Opolt MBT

Opolt MBT

Main armament stabiliser

The main armament stabiliser ensures stabilisation and stabilised aiming of the armament in the vertical and horizontal planes.

Model
2E42M
Elevation drive
electric-and-hydraulic
Azumuth drive
electric-and-mechanical
Mean error of stabilisation:
  • elevation
0.3 mrad
  • azimuth
0.4 mrad
Gun laying speeds:
  • elevation:
    • minimum
within 0.05 degrees/sec
    • accurate
aiming 0.05-1 degrees/sec
  • azimuth:
    • minimum
within 0.05 degrees/sec
    • accurate aiming
0.05-1 degrees/sec
    • quick traverse
35-40 degrees/sec

Tanks guided weapon system

The system is intended to fire a guided missile through the tank gun barrel. The aiming is carried out by means of the gunners 1G46M sight.

Guided missile round
Izd. 621, 3UBK14, 3UBK20
Warhead type
HEAT
Missile guidance system
semi-automatic, using a laser beam
Max firing range
5000 m

TIUS-VM tank ballistic computer

Type - analogue-and-digital, with built-in test system and digital monitoring of parameters, automatic generation of super-elevation and lead angles for all types of projectiles and coaxial machine gun, with taking into account all topographic, meteorological and ballistic parameters that affect the accuracy of firing, with automatic registration and storing the parameters of the integrated gun-and-fire control system in various modes of operation.

Parameters that are automatically taken into account by the computer - target range, own tank movement, target speed, crosswind speed, gun trunnion axis cant, angular speed of the target (in horizontal and vertical planes), target position angle, tank movement attitude angle, relative speeds of the tank, muzzle velocity of the projectile.

Parameters that are introduced into the computer manually - air temperature, charge temperature, projectile muzzle velocity deviation due to variations inherent to different lots of ammunition, atmospheric pressure, barrel wear, individual jump angle.

Opolt MBT Opolt MBT Opolt MBT

 

Input sensors of tank ballistic computer

Cant sensor

The sensor is intended for determining the position of the gun trunnion axis and providing the relevant information to the tank ballistic computer.

Trunnion axis cant angle measurement range
at least 15 degrees
Measurement error
within 0.5 degrees

Wind sensor

The sensor is intended to measure the crosswind speed and provide the relevant information to the tank ballistic computer.

Type
capacity-type
Model
DVE-BS
Crosswind speed measurement range
within 20 m/s
Measurement error
1 m/s

Tank speed sensor

The sensor is intended to measure the speed of tanks own speed movement and providing the relevant information to the tank ballistic computer.

Tank speed measurement range
at least 75 km/h
Measurement error
within 0.5 km/h

Opolt MBT

Opolt MBT

Turret attitude sensor

The sensor is intended to measure the angular position of the turret relative to the hull (turret attitude angle) and provide the relevant information to the tank ballistic computer.

Turret attitude angle measurement range
at least 360 degrees
Measurement error
within 1 degrees

Muzzle reference system

The system is intended to automatically measure the gun barrel bend and provide the relevant information to the tank ballistic computer.

Gun barrel bend measurement range (in vertical and horizontal planes)
at least 5 mrad
Measurement step
within 0.1 mrad

Anti-aircraft machine gun control system

The system is intended to:

  • ensure stabilisation and stabilised laying of the anti-aircraft machine gun in the vertical and horizontal planes
  • automatically generate and introduce super-elevation and lateral lead angles with taking into account the deviation of the current firing conditions from the standard ones
Opolt MBT Opolt MBT
 

BALLISTIC PROTECTION

Main passive armour protection

Type - anti-projectile, combined, multi-layer, against penetration of HEAT and APFSDS projectiles (adapted for installation of explosive reactive armour array)

Built-in anti-tandem-warhead explosive reactive armour (BATW-ERA)

The BATW-ERA array is intended to increase the tank's level of protection against kinetic energy (APFSDS) and chemical energy ammunition (HEAT, HESH, HEP), including ammunition with tandem warheads.

The armour protection fitted with BATW-ERA ensures protection against:

  • hand anti-tank grenades, hand-held and stationary grenade launchers and recoilless guns (including ammunition with tandem warheads)
  • anti-tank missiles of TOW-2, Milan and Shturm-S type
  • HEAT projectiles fired by 125 mm tank smoothbore guns
  • APFSDS projectiles fire by 125 mm and 120 mm tank guns

The BATW-ERA array consists of glacis module and side skirts installed on the tank hull, as well as modular elements placed on the outer perimeter of the front and side surfaces of the turret and containers installed on the turret roof.

The Nozh explosive reactive armour elements installed in special niches snap into action when hit by all types of hollow-charge warheads and sub-calibre armour-piercing projectiles.

The Nozh explosive reactive armour elements of the BATW-ERA do not detonate when hit by 12.7 mm bullets, 30 mm armour-piercing projectiles and shell fragments. The Nozh explosive reactive armour elements do not require any maintenance and are safe to deal with.

The Nozh explosive reactive armour elements are stored in containers or on the tank in heated premises or in the open air under a shed protecting them against precipitation and solar irradiation at temperatures from -50 to +55 degrees Centigrade. They can also be stored under the conditions of high humidity (100%) at temperatures of up to +35 degrees Centigrade.

The Nozh explosive reactive armour elements retain their qualities for 10 years, including storage in field conditions for up to 5 years and use on the tank for up to 3 years if the requirements for use, transportation and storage are met.

It takes the tank crew 2.4 to 2.6 hours to prepare the BATW-ERA array for combat operation within without the need to use any special contrivances (to do this, only the explosive reactive armour elements are to be installed).

Anti-mine protection

The anti-mine protection makes it possible to preserve the combat readiness of the crew and operability of the tank's interior equipment in case an anti-tank mine explodes under the tank track (up to 10 kg TNT equivalent) or under the tank driver's compartment bottom plate (up to 4 kg TNT equivalent).

Opolt MBT

Opolt MBT

Opolt MBT

SPECIAL PROTECTION MEANS

Optronic countermeasures system

To improve the tank protectability, the Varta optronic countermeasure system is integrated in the tank.

The optronic countermeasure system provides:

  • confusing of the guidance systems of ATGM by putting out laser jamming covering the horizontal plane of 18 relative to the main gun tube and 2 in the vertical plane
  • jamming of the ATGM guidance systems that use laser illumination of targets, semi-automatic laser guided homing projectiles as well as artillery systems equipped with laser range-finders by activating the remote fast-deploying aerosol screens in a sector of 45 relative to the main gun tube

Optronic jamming station

Time of readiness
6 h (unlimited in combat conditions)
Time of uninterrupted operation
6 ( )
Sector of setting the light interferences relatively the gun:
in elevation
2 degrees
in azimuth (relative to the gun barrel axis)
20 degrees

Aerosol screen laying system

Mode of operation
automatic, semiautomatic, manual
System reaction time in auto mode
less than 0.5 s
Coverage sector by four laser emitters:
in azimuth
360 dg
in elevation
-5 to +25 dg
Qty of launchers
12
Grenade caliber
80 mm
Screen laying range
at least 50 m
Applicable grenade:
time for laying the screen
not more than 3 s
average area covered by a grenade
10x15 m
effective screen duration time
60 s

Crews collective protection system

The system ensures protection of the crew and interior equipment against effects of nuclear explosions, radioactive substances, toxic agents and biological warfare agents, as well as detection and suppression of fires in the crew compartment and power pack compartment.

Opolt MBT

Opolt MBT

NBC protection system

PRHR-M1 radiation and chemical agents detector

PRHR-1 (RCAD) is designed for continuous check-up, detection, signalling and control using actuators of protection means:

  • during intensive gamma- radiation (nuclear blast)
  • during gamma-radiation on the contaminated terrain followed by measuring the doze of radiation
  • during detection of poisonous vapors in the air as a result of enemy actions

The instrument provides light and audible signals in case of detection poisonous agents in the air or gamma-radiation on the terrain as well as it generates commands for switching blower on and shifting over the valve of filtering ventilation unit (FVU) in the filtering position.

The instrument provides light and audible signals in case of detection powerful gamma radiation as well as commands for engine shutdown, shifting over the valve of FVU in the filtering ventilation mode, switching off the blower if it was on, followed by switching it on in 30 to 50 s.

The instrument provides checking its electrical circuits by generation commands (or without command generation) to actuators.

Range of measuring power of gamma radiation exposure doze
0.2-150 R/h
Response time:
  • powerful gamma radiation
within 0.1 s
  • gamma radiation of contaminated terrain
within 10 s
  • detection the the air vapors of poisonous chemical agents (outside the vehicle)
within 40 s

Filter-ventilator unit

The filter-ventilator unit serves to clean external air from poisonous substances, radioactive dust, biological aerosols, to supply cleaned air into the crew compartment and create overpressure in it, as well as to ventilate the crew compartment during firing and fire fighting system comes into action.

Air consumption:
  • via absorber filter
at least 100 cubic metres per hour
  • bypassing the absorber filter
at least 390 cubic metres per hour

Filter-ventilator unit functions in 2 modes:

  • Ventilation mode. In this case blower delivers the dust-free air to crew compartment passing by the absorber filter
  • Filtering and ventilation mode. In this mode the blower delivers the clean air to the crew compartment through the absorber filter
Opolt MBT

Fire suppression system

The system with optical sensors and thermal sensors is designed for detection of fire sources in the crew compartment and power pack compartment and quick suppression, generation of commands for ventilation activation and removal thermal decomposition products from the crew compartment.

Methods of activation:
  • Automatically
vehicle mains is on
  • Manually
panel buttons of the driving compartment and power pack compartment
Response time:
  • crew compartment
not more than 150 ms
  • power pack
not more than 10 ms
  • Number of bottle use
2 times
  • Number of bottles with fire-extinguishing compounds
4 pcs

Fire suppression is exercised by filling the free space of the compartment with extinguishing compound where fire takes place.

For this article proposed are the bottles of 2 litre capacity filled with fire-extinguishing compound Chladon 114B2 or other compound (as agreed) under pressure of 75 kgf/cm2. The bottles are equipped with high-acting heads and pressure alarms.

To provide article survivability, the system has two bottles for each compartment (crew compartment and power pack compartment).

Tank signature reduction means

Dazzle painting

Dazzle is intended for decreasing visibility of a tank and distortion of its image. Dazzle painting used is of three colors. The main color is green, auxiliary color is yellow-gray and additional color is black. Desert color is also used for painting.

Natural camouflage clamps

Clamps for natural camouflage are intended for fastening on the tank branches, grass and so on. There are 24 clamps in the tank set.

Thermal insulation

Thermal insulation is intended for decreasing range and probability of tank detection with heat reconnaissance apparatus and high-precision home warheads.

The thermal insulation consists of ETC top plate blowing channels and reflective screens.

Engine smoke generator

Engine smoke generator is intended for laying smoke screen with the diesel fuel.

Mode of action
multiple
Continuous action time
not more than 10 minutes
Fuel consumption
10 to 12 l/min

Opolt MBT

Opolt MBT

Opolt MBT

Opolt MBT

Opolt MBT

Opolt MBT

CAMOUFLAGE COVER KIT

The camouflage cover kit is intended to reduce:

  • the visual signature of the tank
  • the value of the tank's effective surface of dispersion in order to decrease the distance of detection of the tank by means of radar-type detection stations and weapon guidance systems
  • the thermal irradiation of the heated outer surfaces of the tank in order to decrease the distance of detection of the tank by means of thermal imaging devices and to decrease the probability of 'capturing' the tank by infra-red homing warheads of anti-tank weapon systems (anti-tank guided missiles, mortar projectiles, artillery projectiles)
Level of reduction of power of the signal reflected from the camouflaged vehicle (in the band of 0.8-4 cm)
within 18 dB
Reduction of probability of detection of the camouflaged tank by air-borne radar-type detection systems, at distances of 20 km or more (with the resolution on the terrain being 5-15 m), in comparison with the non-camouflaged tank
at least by twice
Reduction of probability of 'capturing' the camouflaged tank by radar-type systems of weapon guidance, in comparison with the non-camouflaged tank
at least by twice
Probability of detection of the camouflaged vehicle on a airphoto (with the resolution on the terrain being at least 0.2 m)
within 0.3
Distance at which the camouflaged vehicle cannot be recognised visually
at least 1,000 m
Reduction of level of infra-red irradiation of the camouflaged vehicle, in comparison with the non-camouflaged vehicle
at least by thrice
Colours being used protective
green, grey-and-yellow, black

Opolt MBT

SELF-ENTRENCHING DEVICE

Self-entrenching device is intended for digging out individual trenches. It is mounted on the lower nose plate of the tank hull.

Blade is designed for cutting the soil, its displacement, bracings for keeping the blade in operational state during soil cutting, guiding planks for keeping bracings and for blocking the blade from rotation and the clamp serves for keeping the blade in the move.

Self-entrenching device can take two positions: in stowing and in operation.

In stowing, the blade is fastened with two clamps to the lower plate of tank nose.

In operation position, the blade is lowered and when the tank moves forward, it cuts the soil by resting on the bracings. When tank moves backwards, the blade freely slips with its rear part along the soil surface without displacing the soil.

INSTALLATION OF MINE CLEARING SYSTEM

The tank provides for installation of track mine-clearing system (TMC) that allows to pave the way for tanks across mine fields.

To do that the tank hull is equipped with special weldings. Driver's compartment provides place for connection to compressor and tank power supply for controlling the mine clearing system.

Individual set of SPTA is used for its assembly and maintenance. This set makes it possible to carry out the said work by tank crew.

Opolt MBT

Opolt MBT

Opolt MBT

POWER PACK

Power pack is a system of units and assemblies that includes the engine and its service system as follows: fuel system, air feed system, oil system, cooling system, exhaust and heating systems. Power pack is operational in the ambient temperatures from -40 to +55 degrees Centigrade.

Opolt MBT

Engine

6D-2 engine is a multifuel, 6-cylinder, double-stroke liquid cooled diesel engine.

Maximum output using diesel fuel
882 kW (1200 hp)
Max. torque at diesel fuel at engine crankshaft rotation speed at (160010) rpm
3135 N (320 kgfm)
Rotational speed of the crankshaft at max. power
2600 rpm
Specific fuel consumption at maximum power mode
211-231 g/kWh (155-170 g/hph)
Mass of the dry engine
1180-1240 kg
Dimensions:
  • length
1602 mm
  • width
955 mm
  • height
581 mm

The engine is adapted for automatic transmission control. Regulator is equipped with the rack travel sensor of fuel pumps. Diesel has speed measuring device for recording the crankshaft rotational speed.

In electro-mechanical rotational speed governor used is a special mechanism restricting fuel delivery in the range of speeds from 800 to 2000 rpm. Due to that we provide reduction of optical density of exhaust gases at starting and free acceleration modes.

In this fuel apparatus used are nozzles with locking needle.

The engine consists of crankshaft mechanism, crank cases, cylinders, shifting over mechanism, compressor, gas turbine and hang-up assemblies: starter-generator, water pump, air compressor TK-150, regulator, fuel priming pump, fuel filters, high pressure fuel pumps, oil centrifugal filter, air distributor and other units.

Engine cylinders are arranged horizontally. Each cylinder has inlet ports and outlet ports. Inlet ports serve for blowing and filling the cylinders by air, outlet port provide exhaust gas withdrawal. Improved configuration of the inlet ports provides improvement of efficiency due to perfection of gas exchange process and mixture formation. Exhaust gases leaving the cylinders flow through the outlet collector to gas turbine.

Each cylinder holds two oppositely moving pistons. When they move to each other as close as possible formed is combustion chamber. Each piston is connected with its own crankshaft by the connecting rod. These pistons making their reciprocal motion open and close inlet and outlet ports and carry out the function of gas distribution mechanism. In these pistons used are the improved needle bearing of the upper head of the connecting rod and making it possible to increase maximum burning pressure, service life and reliability.

The compressor of inlet air provides improvement of the diesel parameter due to more efficient compression process attained by improved aerodynamics of flowing part.

Gas turbine converts the energy of exhaust gases into mechanical energy for driving the compressor.

The engine is mounted in the power pack compartment. Its installation does not require any adjustment. Axles of the engine crankshafts are arranged laterally to longitudinal tank axle.

The engine is fastened in three places. Two yokes fasten it in the rear part and pivoting bearing fastens it in the front.

Engine systems

Fuel system

The fuel system comprises the following:

  • fuel tanks
  • surge tank
  • fuel distributing valve
  • external tank switch-off valve
  • fuel priming pumps, fuel filling filter
  • fuel pre-filter
  • fuel fine filter
  • centrifugal fuel pump
  • fuel filling pump with a valve
  • air separating tank
  • reverse valve
  • fuel gauges
  • pipe-lines
Opolt MBT

Engine fuel is stored in the fuel tanks with a total capacity of 1,140 litres.

The following fuel is used: diesel fuel, jet engine fuel, petrol and mixtures of these type of fuel.

The system ensures supply of fuel to the engine from either of the fuel tank groups separately or from both of the fuel tank groups simultaneously.

The fuel system also ensures fuel supply to the auxiliary power unit, which is located on the right fender, by means of the pipe-lines going through the vehicle hull side.

Fuel can be replenished through the filling necks of the fuel tanks, as well as by using the filling pump.

Opolt MBT
Capacity of the internal fuel tanks
575 lt
Capacity of the external fuel tanks
570 lt
Capacity of the additional fuel drums
380 (1902) lt

Air system

The air system of the engine is intended to remove dust from the air that comes into the engine. Air purification is performed in three stages with ejection-type removal of dust. The first stage of air purification is performed at a bunker provided with an inertia grid, while the second and third stages, at a two-stage cassette-type air cleaner.

The system consists of an air cleaner with a dust removal ejector, air intake bunker with a inertia grid and ejector that removes dust from the inertia grid.

The air cleaner is a two-stage device. The first stage ensures a preliminary removal of dust from air with the efficiency of 99.78 %. After going through the second stage of air purification, the air is purified with the efficiency of up to 99.85 %. The cassettes are the second stage of the air cleaner.

Engine lubrication system

Lubrication system is intended for oil arrangement in the tank, oil supply to the engine, cleaning and cooling of the oil used in the tank.

Engine lubrication system includes internal oil tank with intake filter; oil radiator; oil pump; priming pump; two exhaust pumps; centrifugal oil filter; oil-gauge, and pipelines.

Lubrication system circulating, performed on the dry crank case principle.

A 105-litre oil tank is installed in the front part of engine compartment, between the bulkhead and the engine. Oil intake for engine supply is performed from the middle compartment, which is filled with oil from other compartments.

The system is equipped with minimum oil pressure sensor.

Opolt MBT

Cooling system

Cooling system is liquid, high temperature system of closed type with forced circulation of coolant and ejection cooling of radiators, it is designed to provide thermal operation mode of the engine. Coolant priming through the engine (at engine crankshafts rotation speed 2600 rpm) is not less than 38 m3/hour. Refilling capacity - 94 litres.

Cooling system includes:

  • ejector
  • engine water pump
  • radiators
  • surge tank
  • steam-admission valve
  • preheater with air-heater
  • engine inner chambers
  • cooling belts of gas duct joint
  • engine water dump valve
  • preheater water dump valve and pipe lines

Main engine cooling system is connected to the APU, which is located on the right fender and provides cooling for operating APU.

Water radiators provide heat abstraction from coolant, and installed in the ejector box of engine compartment roof.

The system is equipped with coolant max temperature indicator and coolant level indicator, which give signal, when the coolant reaches maximal temperature.

The effectiveness of cooling system is regulated with the amount of gases, passing the ejector.

Exhaust system

The system provides cooling outer airflow through radiators, using the energy of engine exhaust gases and exhaust gases release.

The system includes compensator; gas duct; adapter, weld to the right side of the engine compartment roof, together with by-pass gas duct, receiver with nozzle device and ejector setting.

To provide the cooling of the gas duct joint there are water sleeves with circulating coolant.

Opolt MBT

Heating system

Heating system is the part of cooling system and is used to warm up the engine and the oil before engine start, as well as for keeping the engine ready to start at cold seasons.

Warming up of the engine is performed with the help of warmed by preheater coolant. Exhaust gases of preheater warm oil in the engine oil tank.

Heating system includes preheater, engine oil tank flue tube and pipe lines.

Preheater is used for coolant warming and providing its circulation through the cooling system pipes at engine warming up, and oil warming by engine oil tank exhaust gases.

Opolt MBT

Engine starting system

Starting methods:
  • main
by electric starter from four storage batteries
  • auxiliary
by compressed air from air bottles
  • combined
electric starter from SB and compressed air simultaneously
  • from outer source
electrical energy or compressed air of similar vehicle is used
  • push starting
used, when there is no chance to start the engine with all the above mentioned methods
Means to facilitate the starting
  • preheated
  • inlet manifold heater
  • oil injection
Temperature for starting the cold diesel engine without means for prestarting heating:
on GALOL M-4042, M16IHP-3 oil
down to +5C
on M8B2C low-viscosity oil
down to -25 C
Opolt MBT

REVERSIBLE (MULTIPLE REVERSE SPEED) TRANSMISSION

Reversible transmission is intended to increase the tank speed at forward motion and reverse movement. The enhanced gears of reverse movement provide when necessary quick change of position in combat conditions without tank turning.

Reversible transmission consists of two gear boxes with coaxially attached reversible final drives.

Gearboxes

Planetary, with friction gear engagement. Provide 7 forward gears and 1 reverse gear.

Reversible final drives

Reversible final drives consist of two planetary gear sets. Forward and reverse movement is engaged with tooth-type coupling..

Speeds at various gears:

Forward gears
Reverse gears
Number of gear
Speed (km/h)
Number of gear
1
8,4
Reverse 1
10,7
2
15,7
Reverse. 2
19,8
3
19,8
Reverse 3
25,0
4
24,8
Reverse 4
31,3
5
34,2
6
47,2
7
69,3
Reverse
4,8
Opolt MBT

COMPLEX MOVEMENT CONTROL SYSTEM

The complex movement control system (CMCS) is designed to ensure the tank mobility and controllability (=agility) under different road conditions as well as to minimize the drivers fatigue.

The CMCS fulfills the following functions:

  • tank take-off and forward/reverse motion
  • automatic gear shifting depending upon road conditions
  • smooth change of the tank turning radius
  • manual (overriding) transmission control mode within 6 forward and 4 reverse gears
  • locking in case of driver wrong actions
  • built-in check of the movement control equipment
Opolt MBT Opolt MBT Opolt MBT Opolt MBT
 

Components of the CMCS:

1. Control equipment:

  • electronic control unit
  • gear number indication panel
  • protection and adjustment unit
  • interlocking control unit (for manual control mode)
  • transmission current state monitoring electronic unit

2. Controls:

  • steering wheel
  • selector of movement control mode and gear-shift in a manual mode (fited with transmission warning panel)
  • fuel feed pedal
  • clutch pedal

Opolt MBT

Opolt MBT

3. Actuators:

  • electrohydraulic distributing mechanisms of the left and right transmissions
  • electrohydromechanical engine governor
  • control drives

4. Movement control system sensors:

  • engine rotational speed measurement sensor
  • fuel pump rack position sensor
  • rotational speed measurement sensors of the right and left transmission sprockets
  • speed sensor unit
  • controls position sensors

5. Mounting and wiring kit:

  • harnesses
  • pipes
  • hardware

Technical characteristics of the CMCS

Automated operation mode
 
Number of gear
Speed (km/h)
forward
1-7
0-69,3
reverse
1-4
0-31,3
Manual control mode
forward
16
069,3
reverse
13
025,0

Turning radius range (m) 1,4 to ...

Opolt MBT

Opolt MBT

RUNNING GEAR

Running gear consists of track mover and cushion system.

Track mover with rear placement of drive sprockets consists of two idler wheels with track tensioning mechanisms, two sprocket wheels, two tracks, twelve road wheels, ten supporting wheels.

Cushion system consists of twelve personal torsion suspensions and six hydraulic telescopic shock-absorbers.

Track mover

  • Idler wheel is made of cast steel
  • Track tensioner is crank-type, with hour-glass worm pair
  • diameter of idler wheel is 514 mm

Opolt MBT

Opolt MBT

Drive sprocket consists of cast disc, two gear rings, attached with bolts and nuts, and restraining disc, that provides firm gearing of track with sprocket wheel.

To provide firm gearing while moving along the marshland and alike road conditions, there is a sprocket wheel cleaner installed aboard the main battle tank.

Diameter of sprocket wheel gearing
630 mm
Opolt MBT

Road wheels are twodiscs with outer shock absorption made of high quality rubber, that allows tank to move on high speed for a long period of time. Discs of the road wheels are made of high-strength aluminium alloy, they are attached to the hub with the help of bolts, which allows to change them quickly when damaged.

Road wheel diameter
670 mm
Width of road wheel tyre
170 mm
Opolt MBT

Track with replaceable rubber pads includes parallel rubber-metal joint, rubberized running-track and removable rubber shoes; allows the tank to move on the asphalt road without damaging it. The removable rubber shoes are attached to the track grooves and locked with spring lock. Due to the customer requirements the SPTU can include steel grousers to enhance cohesion with the ground, when moving on ice or ground with low bearing capacity.

Number of track-links in the track
80 pcs
Track step
164 mm
Track width
580 or 600 mm
Opolt MBT

Track support rollers are single-tyre, consist of rim with tyre made of high quality rubber, seals and fastening elements.

Track support roller outer diameter
225 mm
Track support roller width
125 mm
Opolt MBT

Cushioning system

Torsion bars are high quality, torsion strength is 14000 kgf/cm2, provide full suspension movement of 410 mm. Torsion bars are located from side to side, with mutual displacement 100 mm.

Shock absorbers are hydraulic, telescopic, double-acting, installed on first, second and sixth suspensions. Shock absorbers use sealing made of heat-resistant rubber, that provide firm sealing at temperature up to 220. Besides, there is a heat restraint installed in the shock absorber, which prevents the shock absorber from heating higher than 220.

Working stroke225 mm
Piston diameter90 mm
Piston-rod diameter40 mm
Maximum direct stroke resistance15 ton-force
Opolt MBT

DEEP FORDING EQUIPMENT

Deep fording equipment (DFE) provides for negotiating the water obstacle up to 1.8 m deep without special preparation of the tank (Brod mode) and water obstacles up to 5 m after installation of special removable assemblies of DFE (PH mode), as well as engaging in combat after negotiating the obstacle without any special works that require the crew to leave the tank. DFE set includes removable and stationary assemblies.

Removable assemblies include:

  • air supply pipe
  • exhaust pipe with wire rope to disengage the lock
  • nose bilge pump valve
  • coax MG port sealing
  • gun muzzle end sealing
  • rope with caps for sealing the AIU intake valves of PRHR-M1
  • back-up communication system, input with signal lamp

Air intake pipe is used for supply of air to the engine of the completely tight tank while moving under water.

Exhaust pipe is used for exhausting the fumes to atmosphere while moving under water at the depth of 5 m to exclude penetration of water into exhaust channel when the engine is shut off.

Nose bilge pump valve prevents the water from penetrating into the tank through the water discharge port with the inoperative pump.

Signal lamp is used to mark the place of the tank while moving through the water obstacle in night conditions.

The set of removable equipment is supplied to the tank in a separate box bearing the tank number.

In view of using the DFE while negotiating the water obstacles at the distance of not more than a day's range, the DFE removable equipment may be stowed on the tank.

Opolt MBT

OBSERVATION AND ORIENTATION DEVICES

Day vision devices

TNPO-160 vision block

Type
Prism with heating of inlet and outlet windows
Number:
commander's station
1 unit is installed and 1 unit is available in SPTA kit
driver's station
3 units are installed in shaft and 1 unit is available in SPTA kit
Magnification
1
Field of view:
in elevation
5 dg
in azimuth
36 dg
Angle of vision in azimuth
78 dg
Periscopicity
160 mm

TNP-165A vision block

Type
Prism
Quantity:
at the commander's
2 in the hatch cover
at the gunner's
3 in the turret and 1 in SPTA kit
Magnification
1
Field of view:
in elevation
8 dg
in azimuth
36 dg
Angle of vision in azimuth
74 dg
Periscopicity
165 mm

Hydraulic pneumatic cleaning of hull and turret vision devices

It is designed for cleaning of vision devices and protection glass from mud by fluid and from dust and snow by air.

TVN-5 drivers night vision device

Type
periscopic, binocular, with image intensifier of the 2nd generation
Number
1
Magnification
1x
Field of view:
in the vertical plane
27 dg
in the horizontal plane
36 dg
Distance of vision of the flat road:
in the passive mode at NNIL from 310 -3 to 510 -3 lx
at least 180 m
in the active mode at NNIL of at least 3 10 -3 lx
at least 80 m

Orientation device

Type
directional gyro
Model
GPK-59
 

TIUS-NM NAVIGATION SUPPORT SYSTEM

The navigation support system (NSS) ensures the solution of the following tasks:

  • determination of own coordinates X, Y and the bearing grid angle a in the rectangular coordinate system using the SN-3700 radio-navigation equipment (RNE);
  • generation, transmission and receipt of commands with coordinates of destination points;
  • gathering of information about subordinates location;
  • input, storage and processing of route points (up to 50 pcs)and movement along the route, number of control points for each route up to 50;
  • formation, transmission and receiving of telecode (textual) messages via the radio channel;
  • indication at the driver's station of information of direction and value of angle of turn to the point of destination.
Accuracy (standard deviation) of the tank location coordinates determination when operating on the following systems signals:
GPS NAVSTAR
40 m
GLONASS
30 m
GPS NAVSTAR/GLONASS
20 m
Quantity of routes being set
Up to 10
Quantity of control points for each route
Up to 50
Gathering of information about the subordinate tanks location, transmission of destination points coordinates and textual information is provided in the units up to the tank battalion level inclusive
Yes
Time of transmission and receipt of information in digital radio channel and range of communication
To be determined by specifications of standard means of communication
Accuracy of presenting the current time (with allowance for the correction for the zone time)
1 s
Time of readiness for operation, max:
under the "cold" start
180 s
under the "hot" start
15 s
Built-in control system
Yes

1KPI commander's information panel is designed for input by means of key-boards into the system of initial settings, codes, commands, requests, destination and control points coordinates, as well as telecode messages that are generated from the Russian language symbols or Latin alphabet and digital symbols on the display of alphabet-digital and graphic information, received or input from outside through the radio station or from navigation equipment. It is also used to set the status of the tank the commander of the respective level (up to the battalion commander) or subordinate (linear) of the respective unit.

1KBI-N information unit provides for:

  • reading of input data and commands from 1KPI panel keyboard and its processing
  • exchange of information ans commands with NSS and radio station
  • processing of information received from NSS and radio station
  • solution of tasks of:
    • computing the current coordinates and directional angle
    • receipt and transmission of commands with coordinates of point of destination
    • gathering of information on location of subordinates
    • input, storage and operation of route points
    • receipt and transmission of telecode messages
    • indication of angle of turn to the driver
  • controlling the indicator (screen) of 1KPI panel (indication of information and command messages)

1KVI panel is designed for providing the information for the driver about the value and direction of the tank angle of turn to the point of destination.

SN-3700 radio-navigation equipment provides for continuous monitoring of the tank coordinates, its route (only on move) and time according to radio signals of navigation space craft of GLONASS and GPS NAVSTAR via open codes at any point of the globe at any point of time and any meteo conditions.

Remarks:

  1. The data on the own tank position, subordinate tanks, points of destination and route points are displayed on the screen of 1KPI in text of graphic format (at the discretion of the commander)
  2. VHF radio stations are used in NSS for exchange of commands, navigation and telecode information via digital radio channel
Opolt MBT

COMMUNICATIONS EQUIPMENT

VHF radio set

Type
VHF, Tx/Rx
Model
R-030U
Operation frequency band
30-110 MHz
Nominal output power
30 W (at reduced power 1 W)
Receiver sensitivity
1 µV
Max. communication range in the cross-country
20-25 km
Transmitter operation modes
  1. Fixed frequency
  2. Pseudo-random operation frequency tuning (POFT), average number of band tuning is 312,5 per second
Modulation type
  1. F3 - for fixed frequencies
  2. F1 - for (POFT)
Number of pre-fixed frequencies
  1. For fixed frequencies - 16 frequencies
  2. For POFT 16 channels
Operation modes
  1. Simplex
  2. Semi-duplex
  3. Duty reception
  4. Simplex in one channel and duty reception in another channel
Transmitted information
  1. Analog (audio) information providing code conversion (technical concealment)
  2. Digital information
  3. Short alpha-numeric code messages
  4. Individual, group and tone calls
Information transmission speed in the digital channel
1 200, 2 400, 4 800, 9 600, 16 000 bit/s
Built-in test system
Available, provides accuracy replacement up to typical component
Opolt MBT

HF radio set

Type
HF, Tx/Rx
Model
R-163-50K
Operation frequency band
2000-29999 kHz over a step of 1 kHz
Number of pre-fixed frequencies
16
Communication range:
  • vertical rod antenna
250 km
  • inclined rod antenna
250 km
  • dipole antenna
350 km
Opolt MBT

Crew intercom system

Model
AVSK-1
Number of subscribers
4, taking in view a socket of troop commander
Headset
ShSh1
Number
4

Opolt MBT

Opolt MBT

AUXILIARY POWER UNIT

Diesel-electric auxiliary power unit is designed to supply power of tank users while at stop and with the main engine shut-off. The auxiliary power unit is arranged on the right fender in tight armoured box and connected to electrical, fuel and main engine cooling systems.

Components

  • Diesel 468A
  • DC starter-generator
Fuel consumption at max output mode, max
4 kg/hr
Time of start of drive engine without pre-start preparation, max
30 s
Continuous operation time, min
24 hr

GENERAL ELECTRICAL EQUIPMENT

Type of scheme
DC, single line (for emergency lightening two line)
Mains voltage
22.5 28.5 V
Mains protection system
Automatic circuit breakers and fuses

Storage batteries

Type
Lead-acid battery
Model
12S-85
Quantity
4
Electric capacity of one battery,
85 A·hr
Total electric capacity of batteries
340 A·hr
Rated voltage of a battery
24 V

Relay-regulator

Model
RN505M1

Rotary junction box

Model
VKU-1

DC starter-generator

Model
SG-18-1S
Starter mode:
  • rated power
at least 20.5 kW
Generator mode:
  • voltage
26.5 28.5 V
  • current strength at the engine shafts rotation frequency of 1600 rpm
630±20 A
  • rated power
18 kW

Illumination and road signaling device

Illumination headlight (quantity, model):
  • headlight with extension
1, FG-127
  • headlight without extension
2, FG-126
  • headlight for VN-5 device
1, FG-125
  • fender lights
5, GST064
Opolt MBT

DRIVERS DIGITAL INSTRUMENTATION PANEL

The driver's digital instrument panel is intended to control the tank's systems, viz.:

  • operation of the pre-heater
  • main engine pre-starting and starting
  • traffic lights operation
  • emergency warning
  • indication of current parameters of the engine and transmission
  • protection of the engine against wrong actions of the driver during engine pre-starting and starting
Overall dimensions
640x390x235 mm
Weight
22 kg

Components of the driver's digital instrument panel:

  • engine and transmission current parameter indication panel
  • engine pre-starting and starting control panel
  • air intake device pipe, bilge pump and directional gyro control panel
  • traffic lights control panel
  • fuel and oil level indication panel
  • transmission control equipment protection and switching-on unit

The driver's digital instrument panel is connected to the vehicle mains ( V, DC) and ensures the following:

  • displaying information about the parameters of the vehicle with the aid of the current parameter indication panel (vehicle speed, vehicle mileage, engine crankshaft rotation speed, engine coolant temperature, engine oil temperature, engine oil pressure, transmission oil pressure, engine operation time, vehicle mains voltage, value of the currant in the circuit of charging/discharging the storage batteries)
  • displaying information about the amount of fuel and oil available in the vehicle
  • control of the actuating mechanisms (by means of using relevant buttons and toggle switches)
  • automated procedure for preparation of the engine for starting
  • control of the outer lighting/warning devices (headlights, marker lights, turning lights, horn signal)
Opolt MBT

AIR CONDITIONING SYSTEM OF THE CREW COMPARTMENT

The air conditioning system is intended to ensure crew comfort in the crew compartment by means of cooling, drying, heating and ventilating the air in the compartment.

Cooling capacity
2.5 kW
Heating capacity
1 kW
Air flow
300 m3/h
Consumed power:
  • cooling mode
1,8 kW
  • ventilation
0,15 kW
  • heating
0,15 kW
Weight (without the armoured protection)
60 kg
Cooling agent
R134

The air conditioning system consists of two air conditioners (one is installed in the tank hull, and the other, in the tank turret). This approach makes it possible to ensure efficient processing of air in both the driver's compartment and the fighting compartment of the tank.

Either of the air conditioners comprises a compressing-and-condensing unit, air processing unit, power unit, control panel, connecting pipes and electrical cables.

The air conditioner is a steam-compressing unit, which is installed in the turret or in the hull of the tank and consists of two main units: compressing-and-condensing unit and air processing unit. The compressing-and-condensing unit is connected to outside air, while the air processing unit sucks in and then lets out the air of the crew compartment. The compressing-and-condensing unit is water-tight, so there is no need for any preparation of the unit before water obstacle crossing.

Heating is ensured by installing electric heaters in the air processing unit.

Opolt MBT

TECHNICAL CHARACTERISTICS

General
Typemain battle tank
Total weight51 t
Crew3
Power-to-weight ratioat least 18.2 kW (24.7 hp/t)
Specific ground pressurewithin 0.097 MPa (0.97 kgf/cm2)
Operating temperature range-40 to +55 C
Main dimensions
Length:
  • gun forward
9720 mm
  • gun rearward
9750 mm
  • hull
7075 mm
Width:
  • without removable side skirts
3400 mm
  • with removable side skirts
4176 mm
Height (commanders sight)2800 mm
Length of track on ground4290 mm
Ground clearance470-500 mm
Track2800 mm
Operational data (single tank in various terrain conditions)
Movement speed:
Average (on dry natural soil road)40-45 km/h
Maximum (on hard-surface road)70 km/h
In reverse gear:
  • minimum
4.8 km/h
  • maximum
31.3 km/h
Fuel consumption per 100 km:
  • on dry natural soil road
325-370 lt
  • on hard-surface road
up to 300 lt
Oil consumption per 100 km:
  • on dry natural soil road
7-19 lt
  • on hard-surface road
4-11 lt
Cruising distance:
  • on dry natural soil road:
    • by using fuel from main fuel tanks
350 km
    • by using fuel from additional fuel tanks
450 km
  • on hard-surface road:
    • by using fuel from main fuel tanks
400
    • by using fuel from additional fuel tanks
500
Negotiating obstacles
Gradient32 degrees
Side slope25 degrees
Trench2.85 m
Obstacle1 m
Deep fording (without preparation)1.8 m
Crossing water obstacles by using deep water fording equipment:
  • depth
5 m
  • width
no limits
Ammunition
Ammunition for the main gun46 (28 in automatic loader)
Gun ammunition typesHE-FRAG, APFSDS, HEAT, GM
Ammunition for:
  • KT-7.62 machine gun
1250 rds (250x5)
  • KT-12.7 machine gun
450 rds (150x3)
  • AKS submachine gun
450 rds
  • flare pistol
12
F-1 hand grenades10
Aerosol grenades12
   

Additional historical data

KMDB
126 Plekhanivska St.
Kharkiv 61001
UKRAINE
Tel.: +380 (577) 57 41 44
Fax: +380 (577) 57 41 01, +380 (577) 57 41 68
www.morozov.com.ua
marketing@morozov.com.ua

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