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K21

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For other uses, seeK21 (disambiguation).
K21
K21 on combat firing practice
TypeInfantry fighting vehicle
Place of originSouth Korea
Service history
In service2009–present
Production history
DesignerAgency for Defense Development
Designed1999–2008
ManufacturerHanwha Defense (originally Daewoo Heavy Industries, later renamed as Doosan DST, follow by Hanwha Defense Systems)
Unit cost$3.2 million
Produced2009–present
No.built466[1]
Specifications
Mass25.6 t (25.2 long tons; 28.2 short tons)
Length6.9 m (23 ft)
Width3.4 m (11 ft)
Height2.6 m (8.5 ft)
Crew3 crew + 9 passengers
Armor2519 aluminium alloychassis. Layers consisting of S2 glass fiber reinforced Al2O3 ceramic armour

All round protection against14.5×114mmAPI projectiles as well as 20 mm FSP

Frontal armour is resistant to 30 mm APDS rounds fired from a 2A72 autocannon (standard on BMP-3 turrets)

Roof armour is resistant to 155 mm artillery shell fragments

Soft- and hard-kill anti-missile defense systems,ERA,NERA (only for the K21 PIP)
Main
armament
SNT DynamicsK40 40 mmautocannon(240 rounds)[2]
TwoRayboltATGMlaunchers (planned)
Secondary
armament
7.62 mmM60GPMG
EngineDoosan- D2840LXEdiesel
750 hp (840 hp for the PIP)
Power/weight29.2 hp/tonne
SuspensionPassive in-arm suspension unit (ISU)
Operational
range
500 km (310 mi)
Maximum speed70 km/h (43 mph) (road)
40 km/h (25 mph) (cross-country)
7 km/h (4.3 mph; 3.8 kn) (water)

TheK21is a South Koreaninfantry fighting vehicle.A replacement for theK200-series, it was formerly designated asK300orXK21KNIFV (Korea Next-generation Infantry Fighting Vehicle). The initial production began in 2009, with theRepublic of Korea Armyplanning to field approximately 466 units. It is designed to effectively defeat other IFVs as heavily armed and armored as theBMP-3.[3]

History[edit]

Development began in 1999. A $77 million contract was awarded toDoosan DSTfor the NIFV prototype in 2003. Three prototype vehicles were delivered to theROK Armyin 2005. A contract for the first batch of K21 vehicles was signed in October 2008 worth $386.7 million. Production began in November 2009 after a ten-year development period. K21s will be deployed from 2013 through 2016.

Design[edit]

Construction[edit]

The K21 KNIFV's chassis is constructed entirely out of aluminium with certain parts, like hatches, made of fiberglass, reducing the weight of the vehicle and enabling it to travel at higher speeds without bulky and powerful engines. The NIFV is to be lighter than other IFVs, including the AmericanBradleyseries, increasing both speed and payload.

The design was finally deemed production-ready in 2009, following 10 years in development and a research budget expenditure of approximately USD $80 million. More than 85% of the vehicle's design is domestic. However a redesign is in order following the sinking of two vehicles while engaged in amphibious operations. A board of inquiry found that the problem was a lack of buoyancy, a malfunctioning wave plate, and a technical problem with the drain pump, all of which are to be corrected in the new design.

Armaments[edit]

K-21 firing its cannon

The two-man turret on the K21 is armed with anS&T DynamicsK40 40 mm cannon.[2]The K40 40 mm automatic gun was developed based on the design of theNobong[4]40 mm twin naval cannon, which was developed to replace theOTO MelaraDARDOCIWS,which was serviced by theSouth Korean Navy,[5][6][7]capable of firingAPFSDS,high-explosive, smoke and multipurpose munitions, and a 7.62 mm machine gun. This is combined with an advanced fire-control system and gun stabilizer usually found on third-generation main battle tanks that makes the K21, together with the GermanPuma,able to move and engage the targets with high degree of accuracy at the same time. The ammunition for the autocannon is stored under the turret. The 40 mm cannon can fire up to 300 rounds per minute, with a projectile velocity of up to 1,005 m/s (3,300 ft/s). The improved APFSDS for it are able to penetrate up to 160–220 mm (6.3–8.7 in) of armor, slightly higher than other similar rounds, due to a self-sharpening process as the round penetrates armour.

The K236 MMFA (Multi-mode Fused Ammunition) has several modes includingproximity,air burst,armour-piercing and fragmentation. The mode is configured by the K21's FCS, which then transmits the necessary data to a small programmable fuse system inside the round before it is fired. This allows more control over the trajectory and impact of the round, expanding the scope of possible targets from medium armored vehicles to aircraft and infantry personnel.

Anti-tank armament includes an indigenous 3rd-generationATGM,with performance similar to the IsraeliSpikeand armour penetration of 700 to 1,000 mm (28 to 39 in) ofRHAbase.

Sensors[edit]

The fire-control system is able to spot and track targets as far away as 6,000 metres (3.7 mi) away and identify them from up to 3,000 metres (1.9 mi) away. IFF sensors are also present. The vehicle also has hunter-killer capabilities with its separate commander's sight (IFV Commander's Panoramic Sight or ICPS) and gunner's sight (IFV Gunner's Primary Sight or IGPS), which can detect both ground and aerial targets. The sights are designed by Samsung Thales.

The gunner's sight is equipped with a third generation thermal viewer and a 1.54μmlaser rangefinder.It can detect targets from 6,000 meters away and identify them from 3,000 meters away. The commander's sight is equipped with the same system as the gunner's. This allows the gunner to use the commander's sight to engage targets if his own sight is disabled or destroyed. The commander of the vehicle also has the ability to override the command to take control of the turret and gun from the gunner.

Armour[edit]

Although not much is known about the composition of the K21's armour, the frontal armour of the vehicle is specifically designed to protect against large caliber automatic cannon rounds, primarily the 30 mm APDS munitions (30×165mm) for2A72automatic cannon used on BMP-3, which has approximately 50 mm (2.0 in) armour penetration at ranges of 1,000 m. The side armour is designed to protect against 14.5 mm AP rounds, which have approximately 25 mm (0.98 in) armour penetration at 1,000 m. The top can withstand fragments from 152 mm artillery shells exploding as close as 10 meters. It has been confirmed that the composite armour comprises S2-glass fibre and Al2O3 ceramic including lightweight aluminium alloy.[8]

The vehicle has a softself-sealing fuel tankthat can absorb the impact of a projectile.[9]There is also anautomatic fire suppressionsystem inside the vehicle to extinguish any internal fires that might erupt.

The K21 PIP (Product Improvement Program) will include an active protection suite and hard-kill anti-missile system similar to the AWiSS that will also be utilized for theK2 PIP.This will increase the vehicle's ability to defend itself against various ATGMs.

Troop deployment[edit]

The K21 is able to carry a total of 9 passengers and 3 more vehicle crew members. With theBattle ManagementSystem, the vehicle crew and passengers inside the vehicle can be instantly notified about the environment around them, improving their situational awareness. A 15 in (38 cm) screen is installed inside the passenger compartment, which provides various data from the BMS. The vehicle is mounted with an external CCD camera, and the passengers inside can survey the environment using the same screen.

Mobility[edit]

Amphibious driver training

The K21 is equipped with a turbochargedDoosanD2840LXE V-10 diesel engine. The vehicle weight is approximately 25.6 tonnes which, combined with the total output of the engine, gives it a power/weight ratio of approximately 29 hp/t. The K21 PIP will feature an improved version of the engine that will give the vehicle an increased power of 840 hp.

A newly developed semi-active ISU, or In-arm Suspension Unit, is available for the K21. The same unit is to be used on theK2 Black Panther.Despite having the same ISU used on the K2 Black Panther, the K21 cannot change its posture.

The vehicle can travel on both land and water. A pontoon system gives more buoyancy to float on water when additional weight is put on to the vehicle.

Pricing[edit]

The average cost per unit is approximately₩3.95 billion ($3.5 million USD) (2014).[10]

Variants[edit]

Light tank[edit]

Doosan DST and Belgian firm Cockerill joined in early 2013 to develop the Cockerill XC-8 turret for the K21 to provide a medium weightdirect firecapability. The XC-8 is based on the Cockerill CT-CV 105HP turret and is fitted with a105 mmor 120 mm gun. The 105 mm version fires all NATO 105 mm ammunition and can also use the Cockerill Falarick 105 Gun-Launched Anti-Tank Guided Missile (GLATGM). It has a maximum elevation of 42 degrees, allowing for a max indirect fire range of 10 km (6.2 mi). The 120 mm version fires all NATO 120 mm ammunition and can utilize the Cockerill Falarick 120 GLATGM. The missile can engage heavy armor beyond 5 km (3.1 mi). Both turrets have a two-man crew, are autoloaded, and are digital, fully stabilized, day/night weapon systems.[11]

In 2014, CMI Defence and Doosan DST publicly revealed theK21-105,alight tankversion of the K21 chassis fitted with a CMI Defence CT-CV 105HP turret.[12]Referred to as a medium tank by its developers, the vehicle weighs around 25 tons with a 3-man crew, and is cheaper to produce and maintain and has better mobility than actual tanks. The vehicle's main role is direct fire support for infantry against armored and soft-skinned vehicles, buildings, and fortifications. Main armament is a 105 mm rifled low-recoil gun that fires standard NATO and newly developed smart ammunition with a max direct fire range of 4 km (2.5 mi); although the gun would not be effective against modern main battle tanks, it can defeat older tanks that North Korea still has in widespread service. The gun can also fire the Ukrainian-designedlaser-guidedFalarick 105 GLATGM, which has a range of 5 km (3.1 mi) and atandem warheadcapable of penetrating 550 mm (22 in) of armor behind ERA. The turret has a bustle-mounted automatic ammunition loading system capable of firing 8 rounds per minute and stores rounds in the bustle compartment, separated from the crew. Secondary armament is a coaxial 7.62 mm machine gun plus an optional roof-mounted 12.7 mm machine gun in aremote weapon station.The K21-105 retains the protection level and amphibious capability of the K21 IFV.[13]

Hanwha Defense (previously Doosan DST) now labels the K21-105 as amedium tank.[14]

Operators[edit]

Current operators[edit]

South Korea
550 units in Republic of Korea Army service.[citation needed]

Future operators[edit]

Australia
129 units to be ordered for the Australian Army.[15]Hanwha Defense Australia (HDA), a subsidiary ofHanwha Defense,proposed a derivative of the K21 known as theAS21 Redbackfor the Australian Army's Land 400 Phase 3 IFV project.[16]In March 2019, Rheinmetall'sLynx KF41and the Redback AS21 were shortlisted for consideration for the project.[17]The same month three prototype AS21s were delivered to the Australian Army for testing purposes.[18]Testing was supposed to begin in 2019 and last two years, but it was delayed by theCOVID-19 pandemic.[16]In July 2023, the AS21 Redback was announced as the successful bidder for the project.[16]The Redback weighs 42 tons and is powered by a MTU America MT881 Ka-500 diesel with anAllisontransmission.[19][15]It has a maximum range of 525 km (326 mi) and a top speed of 65 km/h (40 mph).[15]It can carry eight passengers and has a crew of three.[15]The Redback has a Soucy Defense single piece composite rubber track.[19]The Australian designed EOS (Electro Optic Systems) T-2000 turret based on theElbit SystemsMT30 Mk 2 features an ATKMark 44S Bushmaster II30mm auto cannon, fitted with a two round RafaelSpike LR2anti-tank guided missile (ATGM) system, a EOS R400Remote Weapons Station(RWS) and a coaxial mountedMAG587.62mm machinegun.[19][15]The Redback is equipped with the ElbitIron Fistactive protection system(APS) and an Elbit IronVision system that provides the crew with a 360 degree view.[19][20][15]The Redback is protected byPlasanarmour.[21]Originally 450 vehicles were planned to be acquired to replace Australia'sM113AS4APCs on a one-for-one basis, but this was reduced in April 2023 by theDefence Strategic Review.[16][22]The review recommended that the acquisition be accelerated.[16][22][15]The first Redback is planned to be delivered in early 2027 with deliveries completed by late 2028 at an acquisition cost of betweenAU$5-$7 billion (US$3.4-$4.7 billion).[16]The Redback will be built in a purpose-built Australian factory.[16]HDA has proposed a small initial tranche be built in South Korea to meet the accelerated delivery date.[23]

Potential operators[edit]

Latvia
Latvia is testing the capabilities of multiple IFVs and has expressed interest in the platform.[24]
Romania
Romania has a budget of $3.3 billion for 298 infantry fighting vehicles. According to local observers and public information, the potential candidates are theASCOD 2,the Hanwha AS-21 Redback, and theRheinmetall KF-41 Lynx.The award procedure is ongoing, a winner will be selected in 2024, and the contract should also be signed in 2024.[25][26]

Unsuccessful bids[edit]

Poland
The AS21 Redback was tested in Poland at the end of October 2022 as a potential heavy IFV to serve alongside the lighter, amphibiousBorsuk.[27]However, according to unofficial sources (no official test reports are available) it did not perform well. On November 29, 2022 at the Polish-Korean Defense Industry Cooperation Conference, Hanwha proposed to co-develop a Redback-based heavy IFV withHSW.That IFV would have been called PL-21 and armed with the PolishZSSW-30unmanned turret. This proposal was not chosen however as Poland ultimately decided to develop their own heavy IFV using theKrabSPGpowerpackand suspension as well as experiences gained during the development of the Borsuk IFV.[28]
United States
Oshkosh Defensedeveloped a version of the Redback as its entry under a competitive contract for the U.S. ArmyOptionally Manned Fighting Vehicleprogram,[29]but the Oshkosh/Hanwha submission was not selected.[30]

See also[edit]

References[edit]

  1. ^"K 21 보병전투차 120여대 추가 양산".22 December 2021. Archived fromthe originalon 22 December 2021.Retrieved6 May2022.
  2. ^ab"Guns & Artillery Systems"(PDF).SNT Dynamics.Archived fromthe original(PDF)on 24 May 2022.Retrieved24 May2022.
  3. ^"K-21 K21 Doosan tracked armoured infantry fighting technical data sheet description information UK".Archivedfrom the original on 26 October 2018.
  4. ^"노봉 40mm 쌍열 함포".Hanwha Defense. Archived fromthe originalon 24 May 2022.Retrieved24 May2022.
  5. ^Lee Chiheon (9 July 2020)."K21 보병전투장갑차의 개량이 필요한 이유".Defense Today. Archived fromthe originalon 24 May 2022.Retrieved24 May2022.
  6. ^Yang Nakgyu (13 June 2020)."육군 최초의 대공포 M2A1".Asia Economy. Archived fromthe originalon 24 May 2022.Retrieved24 May2022.
  7. ^"K-21 개량".Bemil. 25 July 2020. Archived fromthe originalon 8 June 2022.Retrieved8 June2022.
  8. ^복합재 동체복합재 방호판Archived5 July 2015 at theWayback MachineDacc Co., Ltd
  9. ^"복합재 연료탱크".Archived fromthe originalon 5 July 2015.
  10. ^"A Study on Developing a CER Using Production Cost Data in Korean Maneuver Weapon System"(PDF).Bemil. September 2014. Archived fromthe original(PDF)on 8 June 2022.Retrieved8 June2022.
  11. ^CMI Defence and Doosan DST Present a New 120/105mm Medium Tank ConceptArchived14 January 2016 at theWayback Machine- CMIgroupe, 18 February 2013
  12. ^https://odin.tradoc.army.mil/WEG/Asset/K21-105_South_Korean_Amphibious_Light_Tank
  13. ^K21-105Archived20 April 2016 at theWayback Machine- Military-Today
  14. ^K21-105 Medium Tank (경전차),archivedfrom the original on 21 December 2021,retrieved6 October2021
  15. ^abcdefgKerr, Julian (27 July 2023)."Hanwha wins lucrative Army IFV contract".Australian Defence Magazine.Retrieved18 October2023.
  16. ^abcdefgYeo, Mike (28 July 2023)."Australia selects South Korea's Hanwha in military vehicle competition".Defense News.Sightline Media Group.Retrieved18 October2023.
  17. ^Acting Minister for Defence Marise Payne; Minister for Defence Linda Reynolds; Senator Jim Molan (12 March 2021)."Infantry Fighting Vehicle contenders unveiled".Department of Defence Ministers(Press release).Retrieved19 October2023.
  18. ^"Prototype vehicles arrive for assessment".Department of Defence(Press release). 3 March 2021.Retrieved19 October2023.
  19. ^abcdBlenkin, Max (March–April 2021)."Title fight".Australian Defence Business Review.Vol. 40, no. 2. Felix Defence. pp. 40–41.Retrieved19 October2023.
  20. ^"Team Redback Completes Key Capability Tests".Electro Optic Systems(Press release). 19 March 2021.Retrieved31 December2023.
  21. ^Yeo, Mike (12 January 2021)."Hanwha unveils Redback IFV for LAND 400 Ph 3".Australian Defence Business Review.Retrieved18 October2023.
  22. ^abSmith, Stephen; Houston, Angus (2023).National defence: Defence strategic review: 2023.Canberra: Department of Defence. pp. 59–60.ISBN9781925890662.Retrieved13 October2023.
  23. ^Kajal, Kapil (4 August 2023)."Hanwha lays out short-term plan for Australian Redback IFVs".Janes.Retrieved18 October2023.
  24. ^"K-21 장갑차, 라트비아 수출될까…3파전 속 지난달 시험평가".SPN 서울평양뉴스(in Korean). 16 December 2023.Retrieved20 December2023.
  25. ^Adamowski, Jaroslaw (22 January 2024)."Romanian government readies fighting vehicle, howitzer deals in 2024".Defense News.Retrieved26 January2024.
  26. ^"România - planuri mari privind achizițiile din Coreea de Sud. Obuziere K9, mașini de luptă și K239 Chunmoo, versiunea coreeană a HIMARS".
  27. ^"AS21 Redback testowany w Żelaznej Dywizji".MILMAG(in Polish). 20 October 2022.Retrieved21 August2023.
  28. ^"Umowy na dostawy ciężkich BWP, nowych KTO i Lekkich Pojazdów Rozpoznawczych".DziennikZbrojny.pl(in Polish).Retrieved21 August2023.
  29. ^Beinart, Matthew (26 July 2021)."Oshkosh Defense's OMFV Concept Utilizes Hanwha's Redback Chassis".Defense Daily.Retrieved28 February2022.
  30. ^Here's who will move forward in the Bradley replacement competition.Defense News.26 June 2023.

External links[edit]

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