An anti-aircraft vehicle, also known as a self-propelled anti-aircraft gun (SPAAG) or self-propelled air defense system (SPAD), is a mobile vehicle with a dedicated anti-aircraft capability. The Russian equivalent of SPAAG is ZSU, for zenitnaya samokhodnaya ustanovka,.
Radar is a detection system that uses radio waves to determine the range, angle, or velocity of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. A radar system consists of a transmitter producing electromagnetic waves in the radio or microwaves domain, a transmitting antenna, a receiving antenna and a receiver and processor to determine properties of the object(s). Radio waves from the transmitter reflect off the object and return to the receiver, giving information about the object's location and speed.
Anti-aircraft warfare or counter-air defence is defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action". They include surface based, subsurface, and air-based weapon systems, associated sensor systems, command and control arrangements and passive measures. It may be used to protect naval, ground, and air forces in any location. However, for most countries the main effort has tended to be 'homeland defence'. NATO refers to airborne air defence as counter-air and naval air defence as anti-aircraft warfare. Missile defence is an extension of air defence as are initiatives to adapt air defence to the task of intercepting any projectile in flight.
The acronym "ZSU" stands for Zenitnaya Samokhodnaya Ustanovka (Russian: Зенитная Самоходная Установка), meaning "anti-aircraft self-propelled system"; the "23" signifies the bore diameter in millimeters; the "4" signifies the number of gun barrels. It is named after the Shilka River in Russia. Afghan soldiers nicknamed it the "sewing machine" due to the sound of firing guns. It is also referred to by its nickname of "Zeus", derived from the Russian acronym.
Russian is an East Slavic language, which is official in the Russian Federation, Belarus, Kazakhstan and Kyrgyzstan, as well as being widely used throughout Eastern Europe, the Baltic states, the Caucasus and Central Asia. It was the de facto language of the Soviet Union until its dissolution on 25 December 1991. Although, nowadays, nearly three decades after the breakup of the Soviet Union, Russian is used in official capacity or in public life in all the post-Soviet nation-states, as well as in Israel and Mongolia, the rise of state-specific varieties of this language tends to be strongly denied in Russia, in line with the Russian World ideology.
The Shilka is a river in Zabaykalsky Krai, south-eastern Russia. It has a length of 560 km (350 mi). It originates as a confluence of the Onon and Ingoda rivers. Its confluence with the Ergune on the Russia-China border gives rise to the Amur River. The river is navigable for its entire length. The name derives from Evenki shilki 'narrow valley.'
A sewing machine is a machine used to sew fabric and other materials together with thread. Sewing machines were invented during the first Industrial Revolution to decrease the amount of manual sewing work performed in clothing companies. Since the invention of the first working sewing machine, generally considered to have been the work of Englishman Thomas Saint in 1790, the sewing machine has greatly improved the efficiency and productivity of the clothing industry.
History
ZSU-23-4 at Yad la-Shiryon Museum, Israel.
The previous Soviet self-propelled anti-aircraft gun (SPAAG), the ZSU-57-2, was armed with two 57mm autocannons; it was aimed optically using a basic tracking and lead calculating system. The ZSU-57-2 was not particularly successful despite its very powerful autocannons; it could only carry a relatively small amount of ammunition, was inaccurate as it lacked radar and could not fire while on the move.
The ZSU-57-2 Ob'yekt 500 is a Soviet self-propelled anti-aircraft gun (SPAAG), armed with two 57 mm autocannons. 'ZSU' stands for Zenitnaya Samokhodnaya Ustanovka, meaning "anti-aircraft self-propelled mount", '57' stands for the bore of the armament in millimetres and '2' stands for the number of gun barrels. It was the first Soviet mass-produced tracked SPAAG. In the USSR it had the unofficial nickname "Sparka", meaning "twin mount", referring to the twin autocannon with which the vehicle is armed.
An autocannon or automatic cannon is a large, fully automatic, rapid-fire projectile weapon that fires armour-piercing or explosive shells, as opposed to the bullet fired by a machine gun. Autocannons often have a larger calibre than a machine gun, but are usually smaller than a field gun or other artillery. When used on its own, the word "autocannon" indicates a single-barrel weapon. When multiple rotating barrels are involved, the word "rotary" is added, and such a weapon is referred to as a "rotary autocannon". Modern autocannons are typically not single soldier-portable or stand-alone units, rather they are usually vehicle-mounted, aircraft-mounted, or boat-mounted, or even remote-operated as in some naval applications. As such, ammunition is typically fed from a belt to reduce reloading or for a faster rate of fire, but a magazine remains an option. They can use a variety of ammunition: common shells include high-explosive dual-purpose types (HEDP), any variety of armour-piercing (AP) types, such as composite rigid (APCR) or discarding sabot types (APDS).
The ZPU series armed with 14.5mm heavy machine guns carried on a towed mount for stationary, point air defence had a much higher rate of fire. The 23mm version of this weapon system was known as the ZU-23-2, a towed mount carrying two 23mm cannons. However, these towed or improvised truck-mounted weapons had similar disadvantages.
The ZPU is a family of towed anti-aircraft gun based on the Soviet 14.5×114mm KPV heavy machine gun. It entered service with the Soviet Union in 1949 and is used by over 50 countries worldwide.
A heavy machine gun or HMG is a class of machine gun implying greater characteristics than general purpose or medium machine guns.
The ZU-23-2, also known as ZU-23, is a Soviet towed 23 mm anti-aircraft twin-barreled autocannon. ZU stands for Zenitnaya Ustanovka – anti-aircraft mount. The GRAU index is 2A13.
The development of the ZSU-23-4 "Shilka" began in 1957 along with ZSU-37-2 "Yenisei"[8] and the vehicle was brought into service in 1965, replacing all ZSU-57-2s in air defense units toward the beginning of the 1970s. The ZSU-23-4 was intended for AA defense of military facilities, troops, and mechanized columns on the march; originally, the more powerful guns of "Yenisei" were judged to be effective at covering the inner dead-zone of Soviet surface-to-air missile systems despite the increased weight of the vehicle, but commonality prevailed. Initially, tank regiments should have had the anti-aircraft artillery battalion of "Shilka" (consisting of two batteries, four ZSU-23-4s in each). At the end of the 1960s, one battery was equipped with ZSU-23-4s and the other with ZSU-57-2s. Motorized rifle and tank regiment standard anti-aircraft batteries consisted of two platoons later (one platoon was equipped with four ZSU-23-4s and another with four mobile surface-to-air missile systems 9K31 Strela-1 or 9K35 Strela-10). The ZSU-23-4 combined a proven radar system, the non-amphibious chassis based on GM-575 tracked vehicle, and four 23mm autocannons. This delivered a highly effective combination of mobility with heavy firepower and considerable accuracy. The ZSU-23-4 outclassed all NATO anti-aircraft guns at the time, and it is still regarded as posing a major threat for low-flying fixed-wing aircraft and helicopters.
A surface-to-air missile (SAM), or ground-to-air missile, is a missile designed to be launched from the ground to destroy aircraft or other missiles. It is one type of antiaircraft system; in modern armed forces, missiles have replaced most other forms of dedicated antiaircraft weapons, with anti-aircraft guns pushed into specialized roles.
The 9K31 Strela-1 is a highly mobile, short-range, low altitude infra-red guided surface-to-air missile system. Originally developed by the Soviet Union under the GRAU designation 9K31, it is commonly known by its NATO reporting name, SA-9 "Gaskin". The system consists of a BRDM-2 amphibious vehicle, mounting two pairs of ready-to-fire 9M31 missiles.
The 9K35 Strela-10 is a highly mobile, visually aimed, optical/infrared-guided, low-altitude, short-range surface-to-air missile system. "9K35" is its GRAU designation; its NATO reporting name is SA-13 "Gopher".
The system was widely fielded throughout the Warsaw Pact and among other pro-Soviet states. Around 2,500 ZSU-23-4s, of the total 6,500 produced, were exported to 23 countries. The Soviet Union's successor states continue to manufacture and supply variants of the ZSU-23-4, notably the Ukrainian "Donets" and Polish "Biala" variants.
The Warsaw Pact, formally known as the Treaty of Friendship, Cooperation and Mutual Assistance, was a collective defense treaty signed in Warsaw, Poland among the Soviet Union and seven Soviet satellite states of Central and Eastern Europe in May 1955, during the Cold War. The Warsaw Pact was the military complement to the Council for Mutual Economic Assistance (CoMEcon), the regional economic organization for the socialist states of Central and Eastern Europe. The Warsaw Pact was created in reaction to the integration of West Germany into NATO in 1955 per the London and Paris Conferences of 1954, but it is also considered to have been motivated by Soviet desires to maintain control over military forces in Central and Eastern Europe.
Ukraine, sometimes called the Ukraine, is a country in Eastern Europe. Excluding Crimea, Ukraine has a population of about 42.5 million, making it the 32nd most populous country in the world. Its capital and largest city is Kiev. Ukrainian is the official language and its alphabet is Cyrillic. The dominant religions in the country are Eastern Orthodoxy and Greek Catholicism. Ukraine is currently in a territorial dispute with Russia over the Crimean Peninsula, which Russia annexed in 2014. Including Crimea, Ukraine has an area of 603,628 km2 (233,062 sq mi), making it the largest country entirely within Europe and the 46th largest country in the world.
ZSU-23-4 units saw active service in the Yom Kippur War (1973) and other Arab-Israeli conflicts, the Iran–Iraq War (1980–1988), and the First Gulf War (1990). During the 1973 Yom Kippur War, the system was particularly effective against the Israeli Air Force. Israeli pilots attempting to fly low in order to avoid SA-6 missiles were often shot down by ZSU-23-4s as in Operation Doogman 5. During the Soviet-Afghan War ZSU-23-4 units were used widely and to great effect against mujahideen positions in the mountains, the ZSU-23-4's guns being able to elevate much higher than the weapons on BMPs, BTRs, T-55s, or T-62s.[9] They were also used to suppress defensive positions around the presidential palace during the initial coup in Kabul at the start of the Soviet-Afghan war. The Russian Army used the ZSU-23-4 for mountain combat in Chechnya.
Initially fielded by the loyalist forces of the Syrian Arab Army as a fire support vehicle, a number of them were captured by different factions in the Syrian Civil War and they are normally fielded in a fire support role by all sides. There were no (or at most very limited) attempts by the different opposing forces to use the Shilka in its original anti aircraft role against loyalist and international air forces operating in the area.
Description
ZSU-23-4 graphic.
The radar-guided ZSU-23-4 "Shilka" SPAAG, with its four 23mm (0.90") autocannons, was a revolutionary SPAAG, proving to be an extremely effective weapon against enemy attack aircraft and helicopters under every weather and light condition. The ZSU-23-4 has a very high density, rate and accuracy of fire, as well as the capability for each of the four autocannons to fire its own type of projectile from separate belts. While it is technically possible that each cannon shoots different type of ammunition, there were two types commonly used in late 1970s: OFZT incendiary fragmentation and BZT armour-piercing tracer, which were to be loaded in 3:1 ratio—three OFZT, then one BZT, every 10th BZT round equipped with so-called "copper remover" and marked. Operators were strongly discouraged from shooting from a single barrel.
The appearance of the "Shilka" caused significant changes in NATO tactics in aircraft use at low altitude over the battlefield. Despite its present obsolescence as a modern short-range anti-aircraft weapon, the ZSU-23-4 is still deadly for enemy light armoured vehicles, infantry and firing points as an infantry-support vehicle. With its high rate of accurate fire, the ZSU-23-4 can even neutralize tanks by destroying their gun sights, radio antennas, or other vulnerable parts.[3] ZSU-23-4s, especially late models, have excellent performance and good systems reliability.
Based on the GM-575 tracked vehicle chassis, which used components from the PT-76 light amphibious tank, the ZSU-23-4 mounts an armored turret holding four liquid-cooled 23mm (0.9") 2A7 autocannons linked to an RPK-2 "Tobol" radar (NATO designator: "Gun Dish"). The vehicle weighs 19 tonnes (late modifications up to 21 tonnes), has a movement range of 450km (280mi) and a top speed of 50km/h (31mph). Additional firepower of late modifications can be supplied by a roof-mounted pod of six short-range SA-18 SAMs, or side mounted SA-16s.
The crew numbers four: driver, commander, gunner and radar operator. The driver's compartment is located in the nose part of the vehicle. The fighting compartment is in the center, and the engine compartment is in the rear part of the vehicle.
The transmission consists of a multi-plate metal-contact main clutch, a manual gearbox with five forward gears, two planetary two-step steering gears with locking frictions and two final drive groups. The vehicle chassis has six single rubber tired road wheels, a rear drive sprocket with detachable sprocket rings (lantern-wheel gear) and one idler wheel per side. The first and fifth left, and sixth right road wheels have hydraulic shock absorbers. The track is 11.904 m long, 382mm (15") wide and has 93 links.
Because of a large number of different pipes and tubes to detach during maintenance, the repair procedure for some of the vehicle's mechanisms is hard (for example, replacement or repair of a starter). The electric drive of an air outlet hatch of a gas turbine engine (part of the vehicle's electric power supply system) has an inconvenient location (at the bottom of the hull) which causes overheating and sometimes, jamming of the electric drive. On the other hand, the construction of the electric power supply system is very reliable. Changing the main engine oil and coolant is easy, as is replacement of fuel and oil filters, and sections of the air filter.[10]
The ZSU-23-4 can cross vertical obstacles 0.7 m (2.3') high, trenches 2.5 m (8.2') wide, has a 1.0 m (3.3') fording depth and can climb 30° gradients.[11] The ZSU-23-4 has good maneuverability and cross-country ability, but its diesel engine's power is insufficient for a vehicle of its weight. As a result, off-road acceleration capabilities are sub-par, and the vehicle lags behind MBTs and IFVs on up-hill terrain.[10][12]
The ZSU-23-4 is equipped with an NBC system with an air filtration unit, fire-fighting equipment, TNA-2 navigational system, infrared vision device, R-123 radio set, R-124 intercom and electric power supply system consisting of a DGChM-1 single-shaft gas turbine engine (70hp at 6,000rpm) and a direct-current generator (which provides 27 V and 54 V direct current or 220 V 400Hz alternating current).[13]
Weapons and fire control
Turret and guns
Side view of a US Marine Corps ZSU at Camp Pendleton, 1997
Each water-cooled 23mm 2A7 autocannon has a cyclic rate of 850–1,000 rounds per minute for a combined rate of fire of 3,400–4,000 rounds per minute. The welded turret has a race ring transplanted from a T-54 medium tank with a 1,840mm (6') diameter. The 360° rotating turret is fully stabilised and capable of firing on the move. The turret rotation and autocannon elevation mechanisms provide very good speed and guidance accuracy. The hydraulically driven aiming mechanisms have been proven to be very reliable. Manual aim is used against ground targets. The quad automatic anti-aircraft gun AZP-23 "Amur" has a range of elevation from -4° to +85°. The GRAU designation for ZSU-23-4 turret with 23mm (0.9") AZP-23 "Amur" quad automatic gun is 2A10. An armoured plate inside the turret protects crew members from fire and explosive gas during intense firing.
Ammunition
23mm ammunition
Ammunition capacity is 2,000 rounds stowed aboard (520 rounds per each upper autocannon and 480 rounds per each lower autocannon) loaded in 50-round or shorter belts.
The water-cooled 2A7 23mm guns of ZSU-23-4 fire the same 23×152B mm caliber ammunition as the 2A14 guns of the twin-barrel ZU-23-2 towed gun. While the 23mm Volkov-Yartsev VYa-23 aircraft gun used in the Second World War era Il-2 Sturmovik also fired ammunition of the same cartridge case dimensions, the rounds differed in loading and primer, and are thus not interchangeable with the post-war AA gun ammunition.[14] Compared to the VYa and its ammunition, the air defence guns have slightly higher muzzle velocity, and explosive rounds also have slightly larger HE fillings.[15] The VYa ammunition has brass cases, while 2A7/2A14 ammunition has steel cases.[14]
Three main types of 23mm anti-aircraft ammunition were manufactured post-war: API-T, HEI and HEI-T. In addition to the original Soviet rounds, a number of ammunition manufacturers have since begun to produce ammunition for what is still a widely used caliber; these include new ammunition types such as sub-caliber armor-piercing rounds and frangible ammunition. The following table lists the main characteristics of some of the available 23×152B mm ammunition used in 23mm AA guns:
Blunt AP steel core, with incendiary charge inside windshield cap.[15] Penetration 15mm RHA at 1000 m range and 30-degree impact angle, or 25mm at 400m and 0-degree impact. Tracer burn time 5 seconds.
HE fragmentation round with a reduced HE charge due to the space taken by the tracer; tracer burn time 5 seconds.
APDS-T
APDS-T
103
none
1220
A Polish sub-caliber armour-piercing round with tracer. Penetration 30mm RHA at 100 m range and 30-degree impact angle (from perpendicular), tracer burn time >2.5 s.
A typical loading of each ammunition belt contains 40 OFZT and 10 BZT rounds.[10] They can be fired to a maximum horizontal range of 7km (4.3mi), and a vertical range of 5.1km (3.2mi). The effective vertical range is 1.5km (0.93mi) at a direct range to target of 2.5km (1.6mi) and target speed of 250m/s (up to 500m/s if a modern fire control system is used). The usual autocannon burst consists of 3–10 projectiles and target lead angle is calculated for each burst (fire without adjustment) by computer.[13] In attacking targets on the ground, its effective range is around 2.5km (1.6mi). The short range of its 23mm autocannons and relatively low explosive effect of its small-calibre projectiles mean it is less able to engage threats such as jet attack aircraft and cruise missiles than modern systems like the 2K22 Tunguska armed with more powerful 30mm autocannons and integrated missile armaments. A special 23mm round with composite projectiles was developed for a modern variant of SPAAG (ZSU-23-4M4) to be used against cruise missiles.
Radar
The RPK-2 "Tobol" a.k.a. 1RL33 radar operates in the J band and can detect aircraft up to 20km (12mi) away. It has excellent target tracking capability and is relatively hard to detect by the enemy. However, the radar picks up many false returns (ground clutter) under 60m (200ft) of altitude. The radar antenna is mounted on collapsible supports in the top rear of the turret. There is an optical alignment sight. The RPK-2 radar proved to have good protection against enemy passive electronic radar counter-measures. Nevertheless, the radar system of the ZSU-23-4 has a short detection range during target search, depending on weather conditions (mainly dependent on rain and snow conditions). It is hard to automatically track the target at ranges less than 7–8km (4.3-5.0mi) because of the high angular speed of the target at close distances. The radar needs to be reset quite often because of the unstable parameters of electronic cathode-ray tubes of the target selection system. The absence of an automatic laser range finder requires a skillful commander and gunner.[17][10]
Limitations and problems
Early versions of the ZSU-23-4 sometimes had problems with "runaway guns": after prolonged periods of firing, the guns would get so hot that chambered rounds would "cook off" even if the operator was not pulling the trigger—discharging the weapon and chambering a new round, which would then also cook off, and continue to do so. This would sometimes continue until the entire belt of ammunition had been expended. Overheating barrels could jam and even break away from the vehicle. The problem resulted from a deficient cooling system and made the early ZSU-23-4s dangerous even to friendly troops standing nearby if this happened. Despite the fact that this seldom happened, Soviet operators learned to give these machines a wide berth.(Perrett 1987:100)[11] It was not recommended to perform continuous fire (bursts longer than 15 seconds without pause) on earlier models until the problem with autocannon reliability and overheating during intense fire was solved on ZSU-23-4M (welded tubes of coolant outlet were replaced with flexible pipes). After the autocannon cooling system was improved, the autocannons became extremely reliable.[10]
The ZSU-23-4 has an 1A7 SRP electro-mechanical fire solution calculator, weighing 180kg, that occupies all of the space before the Commander. It contains 60 electric motors driving 110 axles over different potentiometers, shafts, rods, cams, gears and linkages to mechanically calculate ammunition flight time till impact, elevation lead angle, and azimuth lead angle using the target parameters received from the 1RL33 RPK-2 (gun dish) radar, and the correction angle received from the GAG (gyroscope) unit.
Soviet doctrine supplied the vehicle since 1965 in an anti-aircraft artillery battery of two, four-vehicle platoons for anti-aircraft defence of motor rifle and tank regiments. At the end of the 1960s one platoon was equipped with ZSU-23-4 SPAAGs while another one was still equipped with ZSU-57-2 SPAAGs. ZSU-57-2 was completely replaced with ZSU-23-4 by the beginning of the 1970s. In the 1970s, Soviet motor rifle and tank regiments were equipped with an anti-aircraft missile artillery battery consisting of two platoons, one equipped with four ZSU-23-4 SPAAGs and the other with four 9K31 Strela-1 (SA-9 Gaskin) or later with four 9K35 Strela-10 (SA-13 Gopher) short-range surface-to-air missile systems which cover the dead zones of 2K12 Kub (SA-6 Gainful) surface-to-air missile systems belonging to the divisional level. Since the 1980s Soviet motor rifle and tank regiments were equipped with an anti-aircraft artillery battalion of three batteries (one was equipped with ZSU-23-4 or 9K22 Tunguska SPAAGs, the second one was equipped with 9K35 Strela-10 (SA-13 Gopher) short-range surface-to-air missile systems and the third battery with 9K38 Igla man-portable surface-to-air missiles on IFVs or APCs.[13]
The ZSU-23-4 is very vulnerable to enemy anti-tank missiles, cannons and heavy machine guns; the armour is thin (not exceeding 15mm) and the exposed wheels, tracks, radar, and gun barrels can easily be damaged in combat. Firing positions of ZSU-23-4 SPAAGs are typically placed near the forward edge of the battle area (FEBA) but behind the main forces, usually 600–1000 m behind objectives when on the defensive or 400–600 m behind the leading tanks on the offensive. ZSU-23-4 SPAAGs are divided evenly along the troop columns on the march.
At first each ZSU-23-4 operated in combat autonomously, without target marking from regimental or divisional air defence. In 1978, the PPRU-1 (mobile reconnaissance and control post) was passed into service of the Soviet Army. The PPRU-1 ("Ovod-M-SV") vehicle is based on MT-LBu armoured tracked chassis and it was intended for control of motor rifle or tank regimental anti-aircraft unit equipped with ZSU-23-4 SPAAGs and 9K31 "Strela-1M" mobile surface-to-air missile systems. The PPRU-1 is equipped with "Luk-23" radar and an automatic fire control system associated with the divisional air defence system.
The guns are useful against low-flying aircraft and lightly protected ground targets. Due to its effectiveness against ground targets, ZSU-23-4s have been used in urban environments (e.g., Afghanistan, Abkhazia, Chechnya, Syria and Lebanon). This is primarily because the guns can elevate much higher than a tank or APC cannon, enabling armored units equipped with ZSU-23-4s to return fire against ambushes from above.
A small number of ZSU-23-4 SPAAGs are still in use by the Russian Naval Infantry (specifically the 61st and 175th brigades of the Northern Fleet and the 336th brigade of the Baltic Fleet).
Variants
Soviet Union
ZSU-23-4 "Shilka" (1964): pre-production and then initial production models.
ZSU-23-4V "Shilka" (1968): modernized variant with enhanced reliability of some details, ventilation system case located on the hull. Commander vision device was added.
ZSU-23-4V1 "Shilka" (1970): modernized variant with enhanced reliability of radar system and other details, ventilation system cases located on front bilges of the turret. Guidance-system computer was improved (as well as accuracy and efficiency of anti-aircraft fire on the move at 40km/h). It is fitted with a slightly improved diesel engine V-6R-1.
ZSU-23-4M1 (1973): armed with modernized autocannons 2A7M. The pneumatic loading was replaced with pyrotechnic loading (unreliable compressor was removed), welded tubes of coolant outlet were replaced with flexible pipes which increased autocannon barrel life from 3500 rounds to 4500 rounds.
ZSU-23-4M3 "Biryusa" (1977): equipped with identification friend-or-foe system "Luk". All ZSU-23-4M were upgraded to ZSU-23-4M3 level during scheduled repairs. It should be noted that army unofficially continued to use the name "Shilka" for all variants of ZSU-23-4.
ZSU-23-4M2 (1978): so-called "Afghan" variant. Reequipment performed during the Soviet–Afghan War for mountain combat. The radar system was removed and a night-sight was added. Ammunition increased from 2,000 to 4,000 rounds.
Russian Federation and Belarus
ZSU-23-4M4 and ZSU-23-4M5 (1999): modernized variants, armed with two additional paired man-portable air-defense systems"Igla" on each side of the turret and equipped with 81mm smoke grenade launchers, laser emission sensors, electro-optical vision devices (including television system for driver) and improved weapon radar system. The mechanical transmission was replaced with hydrostatic transmission, hydraulic boosters were installed. Mobility increased to the level of main battle tanks. This upgrade was first shown during the exhibition MAKS-99 in Zhukovsky and was carried out by the Minotor Service Enterprise and Peleng Joint Stock Company from the Republic of Belarus, and the Ulyanovsk Mechanical Plant of Russia. The Ulyanovsk Mechancial Plant is also offering ZSU-23-4 upgrade packages independently.[18][19][20]
Ukraine
Donets (1999): This is a Ukrainian modernization developed by Malyshev Tank Factory in Kharkov. It has the modified turret from the ZSU-23-4, armed with two additional paired man-portable air-defense systems"Strela-10" installed on the hull of the T-80UD main battle tank. Ammunition for 23mm autocannons increased two times.
ZSU-23-4M-A (2017): A modernisation package developed by the Arsenal Factory in Kyiv, this system features a new Rokach-AS radar, laser rangefinder, and four automatic Igla missiles.[21]
Poland
ZSU-23-4MP "Biała" (2000): Polish upgrade with Grom anti-aircraft missiles and fully digital passive aiming devices instead of the radar.
India
ZSU-23-4 upgrade: This version was developed by Bharat Electronics Ltd (BEL) of India in cooperation with Israel Aircraft Industries (IAI). The upgraded systems will feature an advanced AESA radar[22] and computers, electro-optical fire control systems, a new Caterpillar 359 BHP diesel engine and a new APU. The upgraded systems are able to operate despite enemy jamming, are able to pick up targets from more than 15km away, and functions in temperatures between 55° Celsius and minus 40° Celsius. The gun is able to shoot down targets flying at 450 miles per hour up to 1,500 meters and out to 2,500 meters. The purpose of the upgrade is to extend the life of the air defence system by 15 years. In December 2004 it was reported that the Indian Army awarded a USD $104 million contract to upgrade 48 ZSU-23-4 air defence systems of the Indian Army.[23][24]
Netherlands
ZSU-23-4 upgrade (1998): As a private venture, Hollandse Signaalapparaten company (now Thales Nederland) of the Netherlands, obtained a number of ex-East German Army ZSU-23-4V1s and developed an upgrade package. The main part of this upgrade is the modernisation of the radar and fire-control system. The first prototype was completed in mid-1998. The upgraded vehicle is equipped with the ASADS Ka-band target tracking radar and the PAGE I-band surveillance radar.[25]
↑ Russian General Staff (translated and edited by Lester Grau and Michael Gress) (2002); The Soviet-Afghan war: how a superpower fought and lost; University Press of Kansas, p. 38. ISBN0-7006-1185-1.
The Flugabwehrkanonenpanzer Gepard is an all-weather-capable German self-propelled anti-aircraft gun (SPAAG). It was developed in the 1960s and fielded in the 1970s, and has been upgraded several times with the latest electronics. It constituted a cornerstone of the air defence of the German Army (Bundeswehr) and a number of other NATO countries. In Germany, the Gepard was phased out in late 2010 to be replaced by "Leichtes Flugabwehrsystem (LeFlaSys)", a mobile and stationary air defence system using the LFK NG missile and the new MANTIS gun system. The mobile platform of SysFla will likely be based on the GTK Boxer.
The M163 Vulcan Air Defense System (VADS) is a self-propelled anti-aircraft gun (SPAAG) that was used by the United States Army. The M168 gun is a variant of the General Dynamics 20 mm M61 Vulcan rotary cannon, the standard cannon in most U.S. combat aircraft since the 1960s, mounted on either an armored vehicle or a trailer.
The M247 Sergeant York DIVAD was a self-propelled anti-aircraft gun (SPAAG), developed by Ford Aerospace in the late 1970s. Based on the M48 Patton tank, it replaced the Patton's turret with a new one that featured twin radar-directed Bofors 40 mm rapid-fire guns. The vehicle was named after Sergeant Alvin York, a famous World War I hero.
The Oerlikon GDF or Oerlikon 35 mm twin cannon is a towed anti-aircraft gun made by Oerlikon Contraves. The system was originally designated as 2 ZLA/353 ML but this was later changed to GDF-001. It was developed in the late 1950s and is used by around 30 countries.
The 2K22 Tunguska is a Russian tracked self-propelled anti-aircraft weapon armed with a surface-to-air gun and missile system. It is designed to provide day and night protection for infantry and tank regiments against low-flying aircraft, helicopters, and cruise missiles in all weather conditions. Its NATO reporting name is SA-19 "Grison".
The BMD-3 is an infantry fighting vehicle (IFV) originating from the former Soviet Union. This armored fighting vehicle is one of the lightest in its class and is intended to be a fire support platform for use by airborne and air assault units. The primary armament is a 30 mm 2A42 autocannon capable of firing different types of ammunition which include high-explosive and armor-piecing. The BMD-3 possesses multiple secondary weapons such as the 9M113 Konkurs missile and the AGS-17 grenade launcher to defeat a wide range of targets from enemy infantry to other armored fighting vehicles.
The ZSU-23-4MP "Biała" is a Polish modification of the ZSU-23-4 Shilka self-propelled anti-aircraft gun. The ZSU-23-4MP "Biała" includes a new digital optical targeting system and 4 Grom surface-to-air missile launcher. The AZP-23 autocannons are equipped with modern ammunition and have an increased effective anti-aircraft range to about 3.5 km, 0.5–1 km more than the original ZSU-23-4. The Grom missiles' maximum range is about 5.5 km.
57 mm AZP S-60 is a Soviet towed, road-transportable, short- to medium-range, single-barrel anti-aircraft gun from the 1950s. The gun was extensively used in Warsaw Pact, Middle Eastern and South-East Asian countries.
Marksman is a British short range air defense system developed by Marconi, consisting of a turret, a Marconi Series 400 radar and two Swiss Oerlikon 35 mm anti-aircraft autocannons. It is similar to the German Gepard system in terms of engine performance, ammunition carried and effective range of the ammunition.
The Type 95 is a Chinese self-propelled anti-aircraft vehicle. It is armed with four 25 mm caliber cannons and optionally four fire-and-forget QW-2 infrared homing missiles. It was first displayed publicly at the Beijing Military Parade in 1999. Earlier in development the system was designated Type 90-II and Type 90-III.
ZSU-37 was a Soviet-made, light, self-propelled anti-aircraft gun (SPAAG), developed by the end of 1943 and produced at Works No. 40 in Mytishchi. It was the first Soviet series-produced tracked SPAAG. ZSU stands for Zenitnaya Samokhodnaya Ustanovka, meaning "anti-aircraft self-propelled mount".
The 23×152mmB used by the USSR/CIS in the VYa-23 aircraft autocannon the Ilyushin Il-2 ground attack aircraft and in the 2A7 and 2A14 autocannons on the ZU-23 anti-aircraft gun series and ZSU-23-4 "Shilka", among others. Note that the ammunition for the VYa-23 uses a brass case and is not functionally interchangeable with the steel-cased ammunition of the modern ZU-23 anti-aircraft gun series. These two weapon systems use different headspace sizes, therefore requiring ammunition of slightly different dimensions. While it is no longer in use in the main anti-aircraft weapons of modern Russia, being replaced by the 30×165mm, it is still in service with the Russian Naval Infantry and many other countries.
The Afanasev Makarov AM-23 is a Russian designed aircraft autocannon that has been used in a number of aircraft in the Soviet Air Force. Its GRAU index was 9-A-036. It was often used in place of the earlier and slower-firing Nudelman-Rikhter NR-23.
The Type 09 is a Chinese self-propelled anti-aircraft vehicle manufactured by Norinco. It is armed with two 35 millimeter cannons and optionally two fire-and-forget infrared homing missiles. It starts to gradually replace the predecessor Type 95. Some military analysts designated the vehicle as Type 07, however the official designation was confirmed as Type 09 on the Theme Exhibition of the 90th Anniversary of Chinese People's Liberation Army.
The KORKUT is a Turkish all-weather-capable 35 mm self-propelled anti-aircraft gun (SPAAG) developed by ASELSAN.
Shirokorad, A. (February 1998). Bronekollektsiya: "Shilka" i drugie otechestvennye ZSU ("Shilka" and Other Native SPAAGs). Issue of a Russian journal.
Zaloga, Steve [Steven J.] (1993). ZSU-23-4 Shilka & Soviet Air Defense Gun Vehicles. Hong Kong: Concord Publications. ISBN962-361-039-4. OCLC48683481.
Mike Guardia and Henry Morshead, Self-Propelled Anti-Aircraft Guns of the Soviet Union, New Vanguard 222, Osprey Publishing Ltd, Oxford 2015. ISBN9781472806222
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