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David
Thu January 16, 2003 10:55pm

M1A1 MBT

Function: Main battle tank (MBT).

Description: The M1A1 is an improved version of the M1 Main Battle Tank (MBT). It includes a 120mm smoothbore main gun, an NBC overpressure protection system, improved suspension and powertrain and an improved armor package. In 1988 the M1A1 design was further improved by the addition of depleted uranium (DU) to the tank's armor matrix. M1A1s assigned to the Marine Corps' tank battalions were further modified to include a Position Location Reporting System (PLRS) as well as a Deep Water Fording Kit (DWFK.) As with all tanks in the M1 line, the M1A1 utilizes a 3x-10x primary sight with both ambient light and thermal (infra red) capabilities which allow the gunner to acquire, identify and engage targets in all weather conditions and at ranges out to 2.5 miles. Furthermore, crew safety is enhanced by storing all main gun ammunition in an armored compartment with specially built "blow out" panels which will redirect explosive energy away from the crew in the event the ammunition is damaged.

General Characteristics, M1A1

Inventory:
U.S. Army: 4,796
U.S. Marine Corps: 221

Manufacturer:
General Dynamics (Land Systems Division)

Transmission:
Allison X-1100-3B hydrokinetic transmission, fully automatic with four forward and two reverse gear ratios.

Engine:
Lycoming Textron AGT-1500 (multi-fuel) gas turbine engine delivering 1500 horsepower

Length, Gun Forward:
385 inches (9.78 meters)

Width:
144 inches (3.66 meters)

Height:
114 inches (2.89 meters)

Combat Weight:
67.7 tons (61.4 metric tons)

Cruising Range:
289 miles (465.29 kilometers) without NBC system

279 miles (449.19 kilometers) with NBC system

Speed:
Maximum: 42 mph (67.72 kph)
Cross Country: 30 mph (48.3 kph)

Obstacle crossing:
Vertical: 42 inches (106.68 centimeters)

Trench: 9 feet wide (2.74 meters)

Slope: 60 degrees at 4.5 mph (7.24 kph)

Crew:
Four: driver, loader, gunner and tank commander

Armament:
Main: 120mm M256 main gun

Secondary:
.50 caliber .50 M2 machine gun
7.62mm M240 machine guns

Ammunition:
40 120mm Cannon rounds (combination of kinetic energy (SABOT) and High Explosive Anti Tank (HEAT) shaped charge)

1,000 Caliber .50 machine gun rounds

12,400 7.62mm NATO machine gun rounds

24 M8 red phosphorus smoke grenades

Sensors:
Cant sensor

Cross wind sensor

Laser rangefinder

Automatic lead input to ballistic fire control solution computer

Secondary armament:
TOW missile
7.62mm machine gun

Sight radius:
8 degrees at 10 power

Ground Clearance:
19 inches (48.26 centimeters)

Introduction date:
1985

Unit Replacement Cost:
$4,300,000

David
Fri March 21, 2003 6:30am

M1A2 MBT

The mission of the M1A2 Abrams tank is to close with and destroy enemy forces using firepower, maneuver, and shock effect. The M1A2 is being fielded to armor battalions and cavalry squadrons of the heavy force. In lieu of new production, the Army is upgrading approximately 1,000 older M1 tanks to the M1A2 configuration. Going from the M1A1 to M1A2, the Army did several things that significantly reduced ballistic vulnerability, adding dual, redundant harnesses components, redundant data buses, distributing electrical power systems so all the power controls are not in one place.

During the Army's current M1A2 procurement program about 1,000 older, less capable M1 series tanks will be upgraded to the M1A2 configuration and fielded to the active forces. There is currently no plan to field the M1A2 to the ARNG. The Army has procured 62 new tanks in the A2 configuration and as of early 1997 completed the conversion of 368 older M1s to M1A2s. The first three years of M1A2 Abrams upgrade tank work, between 1991-1993, delivered 267 tanks. A multi-year procurement of 600 M1A2 upgrade tanks was run at Lima [Ohio] Army tank plant from 1996 to 2001.

Further M1A2 improvements, called the System Enhancement Program (SEP), are underway to enhance the tank's digital command and control capabilities and to to improve the tank's fightability and lethality. In FY 1999, the Army began upgrading M1s to the M1A2 System Enhancement Program (SEP) configuration. In 1994, the Army awarded a contract to General Dynamics Land Systems to design system enhancements to the M1A2, and awarded GDLS another contact in 1995 to supply 240 of the enhanced M1A2s, with delivery scheduled to begin in 1999. M1A2 SEP started fielding in 2000. It adds second generation forward looking infrared technology to the gunner's and commander's thermal sights. This sensor also will be added to older M1A2s starting in FY 2001.

A multi-year contract for 307 M1A2 Abrams Systems Enhancement Program (SEP) tanks was awarded in March 2001 with production into 2004. The current Army plan allows for a fleet of 588 M1A2 SEP, 586 M1A2 and 4,393 M1A1 tanks. The potential exits for a retrofit program of 129 M1A2 tanks to the SEP configuration between 2004 and 2005. Initial fielding of the M1A2 to the Army's 1st Cavalry Division, Fort Hood, Texas, was complete by August 1998. Fielding to the 3rd Armored Cavalry Regiment, Ft. Carson, Colorado ended in 2000. Fielding of the M1A2 (SEP) began in spring 2000 with the 4th Infantry Division, Fort Hood, Texas, and continues. Rolling over of the 1st Cavalry Division's M1A2 tanks to new M1A2 (SEP) tank began in 2001 and continues.

The M1A2 SEP (System Enhancement Package), is the digital battlefield centerpiece for Army XXI. It is the heavy force vehicle that will lead Armor into the next century and transition the close combat mission to the Future Combat System (FCS). The M1A2 SEP is an improved version of the M1A2. It contains numerous improvements in command and control, lethality and reliability. The M1A2 System Enhanced Program is an upgrade to the computer core that is the essence of the M1A2 tank. The SEP upgrade includes improved processors, color and high resolution flat panel displays, increased memory capacity, user friendly Soldier Machine Interface (SMI) and an open operating system that will allow for future growth. Major improvements include the integration of the Second Generation Forward Looking Infared (2nd Gen FLIR) sight, the Under Armor Auxiliary Power Unit (UAAPU) and a Thermal Management System (TMS).

Increased funding for Stryker and Future Combat Systems (FCS) came as a result of Army decisions in 2002 to terminate or restructure some 48 systems in the FY '04 - '09 Program Objective Memorandum (POM) long-term spending plan. Among the systems terminated were: United Defense's Crusader self-propelled howitzer and the A3 upgrade for the Bradley Fighting vehicle, GD's M1A2 Abrams System Enhancement Program, Lockheed Martin's Army Tactical Missile System Block II and the associated pre-planned product improvement version of Northrop Grumman's Brilliant Anti-armor (BAT) munition, Raytheon's Stinger missile and Improved Target Acquisition System, and Textron's Wide Area Mine.

The 2nd Generation Forward Looking InfraRed sighting system (2nd Gen FLIR) will replace the existing Thermal Image System (TIS) and the Commander's Independent Thermal Viewer. The incorporation of 2nd Gen FLIR into the M1A2 tank will require replacement of all 1st Gen FLIR components. From the warfighter perspective, this is one of the key improvements on the SEP. The 2nd Gen FLIR is a fully integrated engagement-sighting system designed to provide the gunner and tank commander with significantly improved day and night target acquisition and engagement capability. This system allows 70% better acquisition, 45% quicker firing and greater accuracy. In addition, a gain of 30% greater range for target acquisition and identification will increase lethality and lessen fratricide. The Commander's Independent Thermal Viewer (CITV) provides a hunter killer capability. The 2nd GEN FLIR is a variable power sighting system ranging from 3 or 6 power (wide field of view) for target acquisition and 13, 25 or 50 power (narrow field of view) for engaging targets at appropriate range.

The UAAPU consist of a turbine engine, a generator, and a hydraulic pump. The generator is capable of producing 6 Kilowatts of electrical power at 214 Amps, 28 vdc, and the hydraulic pump is capable of delivering 10 Kilowatts of hydraulic power. The UAAPU can meet the electrical and hydraulic power to operate all electronic and hydraulic components used during mounted surveilance operations and charge the tank's main batteries. The UAAPU will reduce Operational and Support cost by utilizing the same fuel as the tank at a reduced rate of 3-5 gallons per operational hour. The UAAPU is mounted on the left rear sponson fuel cell area and weighs 510 pounds.

Another improvement in the M1A2 SEP is the Thermal Management System (TMS) which keeps the temperature within the crew compartment under 95 degrees and the touch temperature of electronic units under 125 degrees during extreme conditions. By reducing the temperature in the crew compartment for the crew and electronic units, this increases the operational capability for both soldiers and the vehicle. The TMS consists of an Air Handling Unit (AHU) and a Vapor Compression System Unit (VCSU) capable of providing 7.5 Kilowatts of cooling capacity for the crew and Line Repairable Units (LRUs). The AHU is mounted in the turret bustle and the VCSU is mounted forward of the Gunner's Primary Sight (GPS). The TMS uses enviromentally friendly R134a refrigerant and propylene glycol/water mixture to maintain the LRU touch temperature at less than 140 degrees Fahrenheit. The TMS is mounted in the left side of turret bussel and weighs 384 pounds.

The Army requires that all systems operate in the Army Common Operating Environment (ACOE) to improve combined arms operations. Digitization and information dominance across the entire Army for tactical elements is accomplished using Force XXI Battle Command for Brigade and Below (FBCB2) software. In Abrams, FBCB2 software is hosted on a separate card that enables situational awareness across the entire spectrum of tactical operation. It improves message flow, through 34 joint variable message formats, reports ranging from contact reports to logistic roll ups, as well as automatically providing vehicle location to friendly systems. The SEP allows for digital data dissemination with improved ability to optimize information based operations and maintain a relevant common picture while executing Force XXI full dimensional operation. This enhancement increases capability to control the battlefield tempo while improving lethality and survivability. Finally to ensure crew proficiency is maintained, each Armor Battalion is fielded an improved Advanced Gunnery Training System (AGTS) with state-of-the-art graphics.

Changes to the M1A2 Abrams Tank contained in the System Enhancement Program (SEP) and "M1A2 Tank FY 2000" configuration are intended to improve lethality, survivability, mobility, sustainability and provide increased situational awareness and command & control enhancements necessary to provide information superiority to the dominant maneuver force. The Abrams Tank and the Bradley Fighting Vehicle are two central components of the dominant maneuver digital force.

System Enhancement Program upgrades are intended to:

improve target detection, recognition and identification with the addition of two 2nd generation FLIRs.
incorporate an under armor auxiliary power unit to power the tank and sensor suites.
incorporate a thermal management system to provide crew and electronics cooling.
increase memory and processor speeds and provide full color map capability.
provide compatibility with the Army Command and Control Architecture to ensure the ability to share command & control and situational awareness with all components of the combined arms team.
Additional weight reduction, embedded battle command, survivability enhancement, signature management, safety improvement, and product upgrade modifications to the M1A2 will comprise the "M1A2 Tank FY 2000" configuration fielded to units of the digital division beginning in FY 2000.

The M1A2 IOT&E was conducted from September-December 1993 at Fort Hood, TX and consisted of a gunnery phase and a maneuver phase. The Director determined that the test was adequate, the M1A2 was operationally effective, but not operationally suitable and unsafe. That assessment was based on poor availability and reliability of the tank, instances of the uncommanded tube and turret movement, inadvertent .50 caliber machine gun firing, and hot surfaces which caused contact burns.

FOT&E #1 was conducted in September-October 1995 in conjunction with the New Equipment Training for two battalion sized units. Despite assurances from the Army that all corrective actions were applied, numerous instances of uncommanded tube and turret movement, Commander's Independent Display (CID) lockup and contact burns continued during FOT&E #1. The follow-on test was placed on hold and the Army "deadlined" the two battalions of M1A2 tanks at Fort Hood for safety reasons. The PM isolated 30 "root causes" of the safety problems and completed hardware and software upgrades in June 1996 which were assessed in FOT&E #2.

The M1A2 TEMP was approved during 2QFY98. This TEMP includes a coordinated plan for FOT&E #3 of the M1A2 in conjunction with the IOT&E of the Bradley Fighting Vehicle in FY99 at Fort Hood, TX. This combined operational test will consist of 16 force-on-force battles between a Bradley Fighting Vehicle System-A3/M1A2 SEP combined arms team and M1A1/ Bradley-ODS combined arms team. Additionally, it will serve as the operational test for the 2d Generation FLIR. This approach implements the Secretary of Defense theme of combining testing in order to save resources and ensure a more realistic operational environment.

The Army and DOT&E completed vulnerability assessment efforts and concluded that the "M1A2 Tank FY 2000" is a significant change from the original M1A2 design and will require a system-level survivability evaluation. This evaluation will rely on full-up system level testing of two systems, component and sub-system level testing, modeling and simulation, existing data, and previous testing to assess susceptibility and vulnerability of the "M1A2 Tank FY 2000" and its crew to the expected threat and to assess battle damage repair capabilities.

The M1A2 Abrams Tank with the corrective actions applied by the Program Manager during FY96 is assessed to be operationally effective and suitable. The availability, reliability, fuel consumption, and safety problems observed in previous testing have been corrected. FOT&E #2 was adequately conducted in accordance with approved test plans and the Abrams TEMP. There were no observed instances of the uncommanded tube and turret movement, inadvertent .50 caliber machine gun firing, and hot surfaces which caused contact burns in previous testing.

The largest area of technical risk to the program is the development of the Embedded Battle Command software which is intended to provide friendly and enemy situational awareness and shared command & control information throughout the combined arms team. This software is being developed as a Horizontal Technology Insertion program and will be provided to the weapon systems and C2 nodes of the combined arms team in FY00. This development schedule is high risk and could adversely impact the M1A2 schedule.

In late 2002 the Army experienced a tragic accident involving the M1A2 Abrams main battle tank. While the crew of the M1A2 was operating the vehicle, a failure within the vehicle's Nuclear, Biological, Chemical (NBC) main system occurred which resulted in an NBC filter fire. One soldier died and 9 others received injuries. While there are numerous factors involved in this accident, the primary cause of the NBC Filter fire is an air cycle machine seizure, caused by dirt ingestion.

The M1A2 tank provides various warnings and cautions to crewmembers in the case of an NBC system problem. These warnings and cautions are displayed visually at the Commander's Integrated Display (CID) and at the Driver's Integrated Display (DID); additionally, an Audio tone is transmitted to each crewman via the Vehicular Intercommunication Set (VIS). The audio warning is generated from the tank's Analog Input Module (AIM) by way of the 2W119-5 wiring harness (Y-cable) which is connected to the driver's station, full-function, control box (AN/VIC 3). This Y-cable must be connected to the driver's control box at the J3 connector with the driver's CVC plugged into the P4 end of the Y-cable. Failure to properly hookup the 2W119-5 cable will not interfere with vehicle communications, but it will result in NO NBC warning tone being heard. In addition to the accident vehicle, several other M1A2 tanks at this installation were found to have the same incorrect connection. Commanders should ensure that each M1A2 in their command is inspected to ensure that this system is correctly connected. The NBC system should not be used until the inspection is complete.

If an NBC warning message is given (visually or audio), crews should immediately press NBC MAIN pushbutton on the CID to turn off the NBC main system. Continued use of the NBC main system will result in an NBC filter fire.

The NBC system is a critical component of the M1A2; it provides crews with increased protection when operating in a combat environment. This system requires proper servicing and checks as outlined in the technical manual. Ensure that all NBC sponson bolts and hardware are properly mounted and secure at all times. Failure to do so can result in the build up of dirt and dust within the NBC sponson box with the potential of damaging the Air Cycle Machine (ACM) and other components.

David
Fri March 21, 2003 6:30am

David
Sat January 3, 2004 10:15pm

T-62 MBT

Function: Soviet front line MBT during the 1960s.

Background: The T-62 was introduced in 1961 to replace the T-55 as a Soviet front line main battle tank. In many respects, the T-62 represents a product improvement upgrade of the T-55; the T-62 uses the same 580hp V-12 diesel engine, the track, suspension, and drive train arrangement are essentially the same. The initial-run T-62 also shared the same NBC protection system and active infrared gunner's sight as the T-55. The T-62 uses the same fording components as the T-55 and is capable of fording to a depth of 1.4m without modification and to 5.5m with the snorkel kit. The T-62 is capable of producing onboard smoke by injecting vaporized diesel fuel directly onto the engine exhaust.

The T-62's real improvement lay in its 115mm smoothbore, high velocity cannon. With a muzzle velocity of over 1,600m/s, the T-62 has a nearly flat trajectory through its entire effective range, making the gun very accurate. Later production models incorporate a true NBC filtration/over-pressurization system, thus eliminating the need for the crew to wear protective masks while inside the tank, as well as a passive IR gunner's sight which eliminated the need for active infrared search lights which would reveal the location of the illuminating tank.

Although the Soviet Union ceased production of the T-62 in 1975, the T-62 still remains in front-line service with a number of countries world-wide.

Description: The T-62 is similar in appearance to the T-55. The T-62 uses the same "live track" design as the T-55. There are 5 large cast road wheels, with a distinctive gap between the third and fourth and the fourth and fifth road wheels. The track is all steel, the idler wheel is to the front, the drive sprocket is to the rear and there are no return rollers.

The turret is more egg or pear-shaped than dome-shaped, as with the T-55, and the attached infantry hand rails, if present, are both curved, as opposed to the straight and curved rails on the T-55.

The main IR searchlight is mounted on top of the turret, to the right of the main gun, as with the T-55, with one secondary searchlight mounted below the main light to the right of the gun and one mounted on the commander's cupola on the left side of the turret.

The 115mm smoothbore cannon uses the same trunion arrangement as with the T-55, substituting an armored mantlet for a canvas weather-resistant cover. The cannon has a bore evacuator mounted one third of the way down the gun tube and may be equipped with a thermal sleeve.

The T-62 employs the same coaxial PKT-T 7.62mm machine gun as the T-55 and is mounted to the right of the main gun. The 12.7mm DShK anti-aircraft machine gun is mounted at the loader's station.

As with the T-55, the T-62 does not use armored fuel cells. Instead, the fuel is stored in exposed tanks on the track fenders. The engine exhaust is expelled out the left rear side of the hull. Auxiliary fuel tanks may be attached to the rear of the hull.

General Characteristics, T-62 Main Battle Tank

Manufacturer:
Soviet Union

Transmission:
Automatic

Engine:
620hp liquid cooled V-12 diesel

Length. Gun Forward:
21.55 feet (6.63 meters)

Width:
11.44 feet (3.52 meters)

Height:
7.8 feet (2.4 meters)

Combat Weight:
41.5 tons

Cruising Range:
450 kilometers (650 kilometers with additional fuel tanks)

Speed:
Maximum: 28 mph (45 kph)

Fording:
Without Preparation:
4.55 feet (1.4 meters)

With Snorkel:
17.88 feet (5.5 meters)

Crew:
Four (Loader, driver, gunner, Tank Commander)

Armament:
Main:
115-mm smoothbore gun, 2A20
AT-10 Sheksna Cannon launched ATGM

Secondary:
One 12.7mm DShK anti-aircraft machine gun (loader's station)

One 7.62mm PKT-T coaxial machine gun

Ammunition:
40 main gun rounds, typically 12 HVAPFSDS rounds, 6 HEAT rounds, and 22 HE rounds

Sensors:
Drozd APS (T-62D)

Introduction Date:
1961

Variants:
T-62A: First production model of the T-62. Incorporates the 12.7-mm DShK anti-aircraft machine gun, which is mounted at the loader's station, and an improved two-axis gun stabilization system that gives the gunner limited a shoot-on-the-move capability.

T-62K: Command variant. In addition to having increased radio capabilities, the "K" model also possesses an inertial land navigation system. Using a gyroscopic compass and distance calculator this navigation system allows the commander to plot his location from a known point as well as display direction and distance to a plotted point.

T-62M: The T-62M is essentially an "A" model upgraded to the T-55M standard. Added the Soviet made Volna fire control system (dual-axis stabilization, laser range finder) as well as a cannon launched ATGM (AT-10 Sheksna.) Upgrades in armor protection include the 180o "bra" armor belt on the front half of the turret, track side skirts, and smoke grenade launchers.

T-62M1: "M" model without the through cannon ATGM capability. "-1" variants have replaced their standard power plant with the 780hp V-46 12 cylinder diesel engine from T-72 MBT.

T-62D: Variant with the Drozd APS in place of Explosive Reactive Armor (ERA.) Developed by the Soviet Union in 1977, the Drozd system was designed as an active defense against ATGMs and anti-tank grenades. The system was based on a number of millimeter-wave radar transceivers situated around the turret. The radar sensors would detect the approach of an ATGM and fire off short-ranged fragmentation rockets that were intended to shred the incoming missile. To prevent accidental discharge, the system was equipped with a filter to react only to objects flying at characteristic ATGM speeds. The four-barreled launchers were located on the forward part of the turret and only provided protection for the front 60? portion of the turret. To change the covered arc of coverage the crew would have to rotate the turret and orient the coverage cone on the threat.

T-62MK: Command variant of the T-62M.

T-62MV: "M" variant with ERA (either Kontakt or Kontakt-5 second generation) in place of the bra armor.

David
Sat January 3, 2004 10:15pm

T-80 MBT

Function: Current Russian front line main battle tank (MBT).

Description: The T-80 MBT is a continuation of the T-64/T-72 series, retaining many similar features of the previous tanks. It is similar to the T-72 in that it retains the low silhouette, centrally mounted round turret with the commander seated to the right of the main gun and the gunner on the left. As with the T-72 the T-80 retains the use of the automatic loader, feeding ammunition from a 27 round circular magazine around the turret ring. Attached to the hull below the front slope is a toothed dozer blade. Beneath the blade are attachment points for the KMT-6 mine plow. The T-80 is the first Soviet design to incorporate a laser rangefinder as well as a gas turbine engine for increased automotive performance. The T-80 is currently in service with the Russian army and is slowly being replaced by the T-90.

General Characteristics, T-80 Main Battle Tank

Manufacturer:
KBTM, Omsk, Russian Federation

XKBM, Kharkov, Ukraine (T-80UD and T-84)

Transmission:
Automatic

Engine:
GTD-1250 gas turbine, 1250 horsepower (T-80U, T-80 originally equipped with the GTD-1000 delivering 1,100 horsepower)

Length. Gun Forward:
31.69 feet (9.66 meters)

Width:
12.00 feet (3.60 meters)

Height:
7.21 feet (2.20 meters)

Combat Weight:
46 tons

Cruising Range:
350 kilometers (600 kilometers with additional fuel tanks)

Speed:
Maximum: 43 mph (70 kph)

Cross Country: 30 mph (48 kph)

Obstacle Crossing:
Trench: 9.35 feet (2.85 meters)
Slope: 32 degrees

Fording:
Without preparation: 5.9 feet (1.8 meters)

With Snorkel: 16.4 feet (5 meters), or (39.4 feet (12 meters) with BROD-M system

Crew:
A three-man crew composed of a driver, gunner, and tank commander

Armament:
Main: 125mm 2A46M-1 main gun

Secondary: One 12.7mm NSVT anti-aircraft machine gun (commander's station), one 7.62mm PKT coaxial machine gun

Ammunition:
45 125mm Cannon rounds (combination of kinetic energy (SABOT), High Explosive Anti Tank (HEAT) shaped charge, High Explosive-Fragmentation (HE-FRAG), cannon launched AT-8 ATGM)

450 12.7mm machine gun rounds

1,000 7.62mm machine gun rounds

Sensors:
Shtora-1 countermeasures suite (T-80UK, T-80UM1)

Arena active protection system (T-80UM1, T-84)

Introduction Date:
1978

Variants:
T-80: Original production version. Fielded in 1978, equipped with the GTD-1000 gas turbine engine delivering 1100 horsepower. Utilized the same 125mm smoothbore cannon (2A46M-1) as the T-72 series but capable of firing the cannon launched, 9M177 Kobra ATGM (NATO designation AT-8 SONGSTER.) Tank is equipped with a 7.62mm PKT machine gun coaxial mounted on the right side of the cannon and a 12.7mm NSV machine gun mounted in the commanders cupola.

T-80B: First upgrade. Incorporates composite K ceramic armor in turret design to improve defense against kinetic energy (KE) penetrators. T-80BK is the command variant of the B model and has increased communications equipment. T-80BV: B model equipped with first generation reactive armor. At the time of its introduction, the application of reactive armor made the T-80 immune to all NATO ATGMs in production. The T-80BVK was the command variant of the T-80BV.

T-80U: First observed in 1989. Designated the M1989 SMT (Soviet Medium Tank). Modifications include a new turret design with improved frontal armor as well as the application of second generation explosive reactive armor. The AT-8 has been replaced by the cannon launched, laser guided 9M119 Refleks ATGM (NATO designation AT-11 SNIPER). Engine has been upgraded to the more powerful GTD-1250 gas turbine producing 1250 horsepower. The commander's weapon station has been redesigned to allow the firing of the 12.7 NSVT machinegun from within the turret. The T-80UK is the command variant of the T-80U. In addition to additional communications equipment, the T-80UK also fields the Shtora-1 countermeasures suite, an automated system combining an infrared jammer, laser warning system, and grenade discharging system.

T-80UM1: Incorporates new gunner's thermal sight as well as the Shorta-1 countermeasures suite and new Arena active ATGM protection system. Use of the Arena system precludes the need for the Kontakt-5 second generation reactive armor and so it has been removed.

T-80UD: Esentially a Ukrainian built version of the Russian T-80U. Major differences include the replacement of the gas turbine engine with a GTF V-12 diesel engine producing 1000 horsepower and the use of first generation reactive armor in pmace of the second generation Kontakt-5 ERA.

T-84: An improved version of the Ukrainian T-80UD incorporating the 6TD-2 diesel engine generating 1200 horsepower. In addition, the T-84 fields the Shtora-1 countermeasures suite and the ARENA active antimissile defensive system as well as the Ukrainian produced KBA-3 125mm smoothbore cannon and 28 round autoloader.

David
Sat January 3, 2004 10:15pm

T-55 MBT

Function: Soviet front line MBT during the 1950s.

Background: Introduced in 1949, the T-54/55 is in service with more countries world-wide and in greater numbers than any other tank manufactured since World War II. The first new tank of the post-World War II Soviet Union, the T-54/55 can trace its lineage back to the IS series Stalin heavy tanks and the revolutionary T-34 medium tanks.

The T-54 entered production in the Soviet Union in 1947, and was fielded with Soviet ground forces in 1949. By 1958, the T-54 had undergone a number of improvements and modifications and was re-designated the T-55. The T-55 represents an evolution of the T-54 rather than a completely new design.

The T-55 was produced by the Soviet Union through 1981. In addition, the T-55 was also produced in China (where it was designated the Type 59), Czechoslovakia, and Poland. The T-55 is capable of fording to a depth of 1.4m without modification and to 5.5m with the addition of a snorkel kit. The T-55 is capable of producing onboard smoke by injecting vaporized diesel fuel directly onto the engine exhaust.

Though time and technology have rendered the T-55 obsolete as a front-line main battle tank, large numbers of 54/55s remain in service with militaries world-wide. The T-55 saw service in Hungary in 1956, Czechoslovakia in 1968, and in Syria in 1970. In addition, it was the main battle tank used by the Arab forces during the 1967 and 1973 Arab-Israeli wars. During the 1970s the T-54/55 also saw extensive use during the border wars in Africa. Since so many T-54/55s remain in service, many countries, such as Israel, Pakistan, and India offer upgrade packages to rebuild existing tanks using more modern, and in many cases Western, fire control components, thus extending their usable life even further.

There are currently seven production models of the T-54/55, and more than a dozen variants.

Description: The T-54/55 tank follows a conventional layout, with a dome-shaped turret centrally located on the hull and the engine mounted in the rear. The 54/55 has a crew of four; driver (located in the left hand side of the hull, forward of the turret) loader (right hand side of the turret) tank commander and gunner (both located on the left side of the turret.

The T-54/55 can be identified by the distinct gap between the first and second of its five large cast road wheels. The 54/55 uses steel track (this may be substituted for padded track in modified versions), a torsion bar "live track" suspension with no return rollers and a rear mounted drive sprocket. The T-55 does not use armored fuel cells. Instead, the fuel is stored in exposed tanks on the track fenders. The engine exhaust is expelled out the left rear side of the hull.

The 100mm cannon is centrally mounted in the turret. The cannon trunions are not protected by an armored mantlet, but rather a canvas sleeve that protects the mechanism from the elements. There is no fume extractor on the T-54, while the T-55 has a bore evacuator mounted on the muzzle of the gun.

There are two hatches on the top of the turret (loader's and tank commanders.) Both hatches open forward. In the T-54 the 12.7mm DShK AA MG is mounted in the commander's station; on the T-55 ("A" version and beyond) the machine gun is located in the loader's position.

Two infantry support rails (one straight, one curved) are affixed to the turret sides. These may be removed to accommodate ERA, APS or applique armor packages. If present the main IR searchlight will be mounted on top of the turret (to the left of the gun.) An additional searchlight may be mounted on the commander's hatch. If present, the laser rangefinder will be mounted externally on the top of the main gun itself.

Because the T-55 does not use synchronized optics for the main gun, another identifying characteristic of the T-55 is the large sighting oval on the left hand side of the turret next to the gun mantlet. The aperture on the right hand side of the turret is the firing port for the coaxial PKT-T machine gun.

General Characteristics, T-55 Main Battle Tank

Manufacturers:
Soviet Union, Czechoslovakia, and Poland

Transmission:
Automatic

Engine:
580hp liquid cooled V-12 diesel

Length. Gun Forward:
20.15 feet (6.20 meters)

Width:
11.7 feet (3.60 meters)

Height:
7.54 feet (2.32 meters)

Combat Weight:
40.5 tons

Cruising Range:
500 kilometers (715 kilometers with additional fuel tanks)

Speed:
Maximum: 31 mph (50 kph)
Off road: 22 mph (35 kph)

Fording:
Without Preparation:
54.5 feet (1.4 meters)

With Snorkel:
17.9 feet (5.5 meters)

Crew:
Four (Loader, driver, gunner, tank commander)

Armament:
Main:
100mm rifled gun, D-10T2S
AT-10 Sheksna Cannon launched ATGM

Secondary:
One 12.7mm DShK anti-aircraft machine gun (loader's station.)

One 7.62mm PKT-T coaxial machine gun

Ammunition:
43 main gun rounds.

Sensors:
Drozd APS (T-55AMD, T-55AD Drozd)

Introduction Date:
1949

Variants:
T-54A: The initial production model of the T-54 tank. It has a bore evacuator at the end of the barrel for the 100mm gun, a stabilization system for the main gun (in the vertical plane only) and deep fording equipment. The turret is also equipped with a coaxially mounted PKT-T 7.62mm machine gun, and the tank commander's station is equipped with a 12.7mm DShK anti-aircraft machine gun.

T-54AK: Command tank variant of the T-54. The AK variant is a T-54A with long-range radio transmitting capability. The Polish model is the T-54AD.

T-54B: Equipped with active infra-red sights, giving the tank a limited night time fighting ability.

T-55: Essentially an upgraded T-54. The T-55 incorporates a more powerful water-cooled V-12 diesel engine. The cruising range has also been increased from 400km to 500km (range can be increased to 715km with the addition of auxiliary fuel tanks mounted on the rear of the hull.) The T-55 uses a new turret design, which incorporates an improve ventilation design and hatch design. The initial production T-55 did not have the 12.7mm DShK AA MG.

T-55A: Incorporates a new anti-radiation lining in the turret as well as a Nuclear Biological Chemical (NBC) air filtration system. The T-55A Model 1970 saw the re-introduction of the 12.7mm DShK AA MG, though it is now mounted at the loader's station.

T-55M: Added the Soviet made Volna fire control system (dual axis stabilization, laser range finder) as well as a cannon launched ATGM (AT-10 Sheksna.) Upgrades in armor protection included the addition of side skirts on the track, applique armor, as well as smoke grenade launchers. T-54s upgraded to the "M" standard were designated the T-54M

T-55AM: Adds an armor band around the front of turret for 180? coverage (similar to the T-72B "Dolly Parton" variant.)

T-55AMV: Substitutes Explosive Reactive Armor for the "bra" armor belt of the "AM" variant. Some variants have replaced the standard T-55 V-12 diesel with the 780hp V-46 12 cylinder diesel engine from T-72 MBT.

T-55AM2B: Czech version of T-55AMV with Czech built Kladivo fire control system.

T-55AM2: Variant of the T-55AM that incorporates all of the upgrades of the "M" and "AM" except for the Volna fire control system and cannon launched AT-10 ATGM.

T-55AM2P: Polish version of T-55AMV. Equipped with the Polish built Merida fire control system.

T-55AMD: T-55AMV incorporating the Drozd Active Protection System (APS) instead of ERA. Developed by the Soviet Union in 1977, the Drozd system was designed as an active defense against ATGMs and anti-tank grenades. The system was based on a number of millimeter-wave radar transceivers situated around the turret. The radar sensors would detect the approach of an ATGM and fire off short-ranged fragmentation rockets that were intended to shred the incoming missile. To prevent accidental discharge, the system was equipped with a filter to react only to objects flying at characteristic ATGM speeds. The four-barreled launchers were located on the forward part of the turret and only provided protection for the front 60? portion of the turret. To change the covered arc of coverage the crew would have to rotate the turret and orient the coverage cone on the threat.

T-55AD Drozd: Naval Infantry T-55A variant equipped with Drozd but not the Volna fire control system or ERA.

David
Sat January 3, 2004 10:15pm

T-72 MBT

Function: Soviet and Warsaw Pact Cold War main battle tank (MBT).

Description: Where the T-64 was never exported from the Soviet Union the T-72 was a parallel design intended for distribution throughout the Soviet Bloc as well as exported through arms sales to other nations. Similar to the T-64, the T-72 has the low, round turret made from cast steel as well as the 2A46M 125mm smoothbore cannon, which, at the time, was the largest mounted on an MBT. In addition, the T-72 mounts a 12.7mm antiaircraft machine gun in the commander's station and a single 7.62mm machine-gun coaxial to the main gun. Though outclassed by the T-80 and T-90 tanks which followed it, the T-72 is currently still in service with the Russian army as well as being produced for export.

General Characteristics, T-72 Main Battle Tank

Manufacturer:
Malyshev HMB Plant, Kharkov, Ukraine

UKBM Nizhny Tagil, Russian Federation

Transmission:
Automatic

Engine:
V-12 air cooled diesel producing 840 horsepower

Length. Gun Forward:
31.70 feet (9.66 meters)

Width:
11.75 feet (3.58 meters)

Height:
7.20 feet (2.19 meters)

Combat Weight:
44.5 metric tons

Cruising Range:
310 miles (500 kilometers); 403 miles (650 km) with additional fuel tanks

Speed:
Maximum: 37 mph (60 kph)

Cross Country: 21 mph (35 kph)

Obstacle Crossing:
Trench: 2.85 meters
Slope: 32 degrees

Fording:
Without preparation: 3.9 feet (1.2 meters)

With Snorkel: 16.5 feet (5 meters)

Crew:
A three-man crew composed of a driver, gunner, and tank commander

Armament:
Main: 125mm 2A46M main gun

Secondary: One 12.7mm NSV antiaircraft machine gun (commander's station); one 7.62mm PKT coaxial machine gun; 9K120 Svir (NATO designation AT-11 SNIPER) cannon launched, laser guided Anti Tank Guided Missile (ATGM) (T-72S, SK, BM)

Ammunition:
45 125mm cannon rounds (combination of kinetic energy (SABOT), High Explosive Anti Tank (HEAT) shaped charge, High Explosive-Fragmentation (HE-FRAG), cannon launched AT-11 ATGM)

300 12.7mm machine gun rounds

2,000 7.62mm machine gun rounds

Introduction Date:
1971

Variants:
T-72: Original production version from which all variants are derived. Fielded in 1971, equipped with 780 horsepower diesel V-12 engine. Tank is equipped with a 7.62mm PKT machine gun coaxially mounted on the right side of the cannon and a 12.7mm NSV machine gun mounted in the commander's cupola.

T-72A: Basic Russian model. Differs from basic T-72 in that it incorporates a laser rangefinder, track sideskirts, additional armor on the turret top and front, smoke grenade launchers and is slightly heavier. Went out of production in 1985.

T-72AV: A model equipped with first generation explosive reactive armor.

T-72B: Entered production in 1985. Incorporates increased frontal armor in the turret. Known in the U.S. as the "Dolly Parton" version. Additionally, engine output is improved to 840 horsepower. The T-72BK is the command variant of the T-72B with additional communications equipment.

T-72BV: T-72B model equipped with first generation ERA.

T-72BM: T-72 B model with Kontakt-5 second generation explosive reactive armor. All T-72s produced for export are currently being built to this standard.

T-72M: Polish-Czechoslovakian version of the basic T-72 tank. The T-72M differs from the T-72 in that the coincident rangefinder has been replaced with a laser rangefinder. Went out of production in 1985.

T-72M1: Export version of the T-72M. Equivalent to the Soviet built T-72A. Produced in Poland and Czechoslovakia. Went out of production in 1985.

T-72M1V: M1 model equipped with reactive armor. Equivalent to the T-72AV.

T-72S: T-72A model upgraded to be on comparable with the T-72BM though lacking increased turret armor. May be equipped with first generation ERA. T-72SK is the command variant with additional communications equipment.

T-72CZ: Czechoslovakian M1 models upgraded with western automotive, fire control and weapon system components.

David
Sat January 3, 2004 10:15pm

T-90 MBT

Function: Latest Russian production Main Battle Tank (MBT).

Description: The T-90 MBT represents a combination of the T-72 and T-80 designs, drawing from the best of both to achieve a more modern product. While the fire control system on the T-90 represents the latest in Russian design and is an improvement over the T-80, the T-90 uses the same V-12 diesel powerplant found in the late model T-72s, sacrificing speed for range and automotive reliability. The T-90 also retains the use of the 125mm smoothbore cannon and automatic loader, feeding ammunition from a 22 round circular magazine around the turret ring. In addition the T-90 continues to use the 9M119 Refleks (NATO AT-11 SNIPER) cannon launched, laser guided ATGM found on the late model T-80s. The T-90 also uses the Shtora-1 countermeasures suite as well as the ARENA hard kill Anti-Missile defensive system. Though currently the most modern tank fielded in the Russian army and available for export, production rates remain low as the T-90 is seen as an interim solution until the next generation of Russian MBT is fielded.

General Characteristics, T-90 Main Battle Tank

Manufacturer:
Nizhnyi Tagil, Russian Federation

Transmission:
Automatic

Engine:
V-84MS Liquid cooled V-12 diesel engine producing 840 horsepower

Length. Gun Forward:
31.7 feet (9.66 meters)

Width:
11.8 feet (3.60 meters)

Height:
7.21 feet (2.20 meters)

Combat Weight:
46.5 tons

Cruising Range:
403 miles (650 kilometers)

Speed:
Maximum: 43 mph (70 kph)

Cross Country: 30 mph (48 kph)

Obstacle Crossing:
Trench: 9.35 feet (2.85 meters)
Slope: 30 degrees

Fording:
Without preparation: 6 feet (1.8 meters)

With Snorkel: 16.4 feet (5 meters)

Crew:
A three-man crew composed of a driver, gunner, and tank commander

Armament:
Main: 125mm 2A46M-1 main gun

Secondary: One 12.7mm NSVT anti-aircraft machine gun (commander's station), one 7.62mm PKT coaxial machine gun

Ammunition:
43 125mm cannon rounds (combination of kinetic energy (SABOT), High Explosive Anti Tank (HEAT) shaped charge, High Explosive-Fragmentation (HE-FRAG), cannon launched AT-11 ATGM)

300 12.7mm machine gun rounds

2,000 7.62mm machine gun rounds

Sensors:
Shtora-1 countermeasures suite

ARENA active anti-missile defense system

Introduction Date:
1993

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