CN08 120 mm gun

The CN08 is a 120 mm 55-caliber smoothbore gun produced by Hyundai Wia. It is incorrectly known as the licensed production of the Rheinmetall Rh-120 L/55, but it was indigenously developed by the Agency for Defense Development and Hyundai Wia from 2003 to 2008 for XK2 development project started in 1995.[5] The development was completed after the operational test ended in September 2008.

CN08 120 mm gun
TypeTank gun
Place of originSouth Korea
Service history
In service2014–present
Used bySouth Korea
Production history
DesignerAgency for Defense Development
Hyundai Wia
Designed2008
ManufacturerHyundai Wia
Specifications
Mass1,324 kg (2,919 lb) Gun barrel
3,103 kg (6,841 lb) Gun mount
Length6.6 m (22 ft)
Barrel length55 calibers
Calibre120 millimetres
Muzzle velocity1,640 to 1,760 m/s (5,400 to 5,800 ft/s) with K279 APFSDS-T[1]
1,678 to 1,800 m/s (5,510 to 5,910 ft/s) with K279 Improved APFSDS-T[2]
Effective firing rangeAPFSDS-T: 3,000 meters (3,300 yd)[3]
KSTAM-I: 5,000 meters (5,500 yd)[4]
KSTAM-II: 8,000 meters (8,700 yd)[4]

Description

The CN08 is the main armament of the K2 Black Panther. The CN08 120 mm L/55 smoothbore gun is applied with Internal chrome plating technology for large-caliber gun. A large-caliber gun can endure a high explosive force as a result of the increased stiffness and wear resistance provided by this internal hard chromium surface.[6][7][8] The main components, including the breech ring and thermal sleeve, are simplified and designed lightly, the gun barrel weighs 1324 kg and the gun mount weighs 3103 kg.

This 120 mm gun consists of a hydropneumatic recoil system and an auto-closing system and is complemented by an autoloader, it can fire up to 10 rounds a minute. The chamber pressure of the main gun is 690 MPa (100,076 psi), and muzzle velocity is 1,800 m/s (5,900 ft/s).[2] It depends on the type of ammunition, but the effective firing range of the main gun is 8,000 meters (8,700 yd).[4]

In addition, the top of the thermal sleeve of the gun barrel is mounted with a Dynamic Muzzle Reference System (DMRS). This dynamic muzzle reference system allows the round to accurately hit the target even when the tank moves or shakes.[9]

Ammunition

CN08's 120mm round is produced in Poongsan Corporation, a South Korean ammunition manufacturer, and can fire NATO's 120×570 mm tank ammunition.

APFSDS Rounds[1][2][6][10][11][12][13][14][15][16]
Ammunition Compatible tank gun Type Penetrator Chamber pressure Muzzle velocity Ammunition weight Ammunition length Sub-projectile weight Sub-projectile length Penetrator weight with fin Penetrator length with fin Propellant type & weight RHA penetration Notes
K276 CN03, CN08, M256 APFSDS-T Tungsten composite 586 MPa 1700 m/s 19.7 kg 973 mm 7.35 kg 703.6 mm 600 mm K683 (Triple-base) 600 mm to 650 mm at 2000 m Self-Sharpening
K279 CN08 APFSDS-T Tungsten composite 1760 m/s 21.3 kg 998 mm 8.27 kg 761.6 mm 5 kg 8.6 kg of L15190 (SCDB) 700 at 2000 m The penetrator is made of W-Ni-Fe-Mo Alloy.
K279 Improved CN08 APFSDS-T Tungsten composite 690 MPa 1800 m/s 21.3 kg 998 mm 8.27 kg 761.6 mm 5 kg 8.6 kg of 19-hole cylinder-type (SCDB) New DNDA-57 Energetic Plasticizer for SCDB Propellant.
HEAT Rounds[1][10][11]
Ammunition Compatible tank gun Type Filler Chamber pressure Muzzle velocity Ammunition weight Ammunition length Sub-projectile weight Sub-projectile length Filler weight Propellant type & weight RHA penetration Notes
K277 CN03, CN08, M256 HEAT-MP-T Comp-B 448 MPa 1130 m/s 24.5 kg 989 mm 14.31 kg 713.32 mm K682 (Triple-base) 600 mm
K280 CN03, CN08, M256 HEAT-MP-T Comp-B 1400 m/s 23 kg 998 mm 11.38 kg 792.75 mm 2.1 kg K684 (Double-base)
TP-T Rounds[10][11]
Ammunition Compatible tank gun Type Filler Chamber pressure Muzzle velocity Ammunition weight Ammunition length Sub-projectile weight Sub-projectile length Propellant type & weight Notes
K282 CN03, CN08, M256 TP-T 448 MPa 1130 m/s 24.5 kg 989 mm 14.31 kg 713.32 mm K682 (Triple-base) For target practice
K287 CN03, CN08, M256 TP-T Fe Powder Sintered 1130 m/s 22.9 kg 980 mm KM30 (Triple-base) For target practice
Guided munition[4][17]
Ammunition Compatible tank gun Type Filler Chamber pressure Muzzle velocity Ammunition weight Ammunition length Sub-projectile weight Sub-projectile length Minimum range Maximum range RHA penetration Notes
KSTAM-I CN08 Terminal guidance TSCW 750 m/s 2500 m 5000 m
KSTAM-II CN08 Fire-and-forget EFP 21.5 kg 985 mm 9.03 kg 2000 m 8000 m

Export

Turkey
Further information: MKE 120 mm tank gun

On July 29 2008, Hyundai Rotem and Otokar signed a contract for technology transfer and design assistance for the Altay Tank Development Project. This contract includes technology transfer and design assistance for systems, armor package, and 120 mm guns required for Altay tank development.[18][19][20][21]

Variants
  • MKE 120 mm gun: Turkish 120 mm 55 caliber smoothbore gun based on the CN08. The design is the same as the CN08 but unlike the CN08, the thermal sleeve is equipped with a Static Muzzle Reference System (SMRS).

Operators

See also

Weapons of comparable role, performance and era

References
  1. Security Management Institute (25 May 2018). "화기별·탄종별 사격장 안전기준 정립 연구". Republic of Korea Army Headquarters. Archived from the original on 14 October 2021. Retrieved 14 October 2021.
  2. Agency for Defense Development (9 December 2016). "Pressure Analysis and Conceptual Design for Indoor Ballistic Test Range by Numerical Methods" (PDF). Korea Science. Archived from the original (PDF) on 14 October 2021. Retrieved 14 October 2021.
  3. "Gun & Artillery System" (PDF). Hyundai Wia. Archived from the original (PDF) on 14 October 2021. Retrieved 14 October 2021.
  4. Agency for Defense Development (31 January 2006). "A Trade Study of the Top Attack Smart Tank Ammunition" (PDF). Korea Science. Archived from the original (PDF) on 17 October 2021. Retrieved 17 October 2021.
  5. Lee Jihun (5 January 2016). "방위산업, 저성장 시대의 대안" (PDF). SK Securities. Archived from the original (PDF) on 28 October 2021. Retrieved 28 October 2021. p. 14
  6. Agency for Defense Development (30 December 2005). "Effect of CCC Composition on Burning Characteristic for 120mm Kinetic Energy Ammunition" (PDF). Korea Science. Archived from the original (PDF) on 19 October 2021. Retrieved 19 October 2021.
  7. Cotec (1 July 2008). "시뮬레이션 기법을 이용한 장축 실린더 내경도금의 전류분포 기술지원" (PDF). Ministry of Knowledge Economy. Archived from the original (PDF) on 14 October 2021. Retrieved 14 October 2021.
  8. Defense Agency for Technology and Quality (7 October 2015). "Study On Effect of Fe Density on Electrolyte Exfoliation of Chromium Plating Layer" (PDF). Korea Science. Archived from the original (PDF) on 14 October 2021. Retrieved 14 October 2021.
  9. Hyundai Rotem (5 April 2016). "A Study on Measurement of Gun's Attitude of K2 MBT Using Inertial Navigation System and Its Effects on the Hit Probability" (PDF). Korea Science. Archived from the original (PDF) on 7 July 2021. Retrieved 7 July 2021.
  10. Poongsan Corporation. "Ammunition and Explosives" (PDF). Archived from the original (PDF) on 17 October 2021. Retrieved 17 October 2021.
  11. Poongsan Corporation (2020). "풍산탄약". MADEX. Archived from the original on 14 October 2021. Retrieved 14 October 2021.
  12. Defense Agency for Technology and Quality (29 February 2020). "Study on the Improving Penetration Performance of Tungsten Heavy Alloy Penetrator by Heat Treatment" (PDF). Korea Science. Archived from the original (PDF) on 17 October 2021. Retrieved 17 October 2021.
  13. Agency for Defense Development (1 October 2004). "Manufacturing of Tungsten Heavy Alloy Composites for Kinetic Energy Penetrator" (PDF). Korea Science. Archived from the original (PDF) on 17 October 2021. Retrieved 17 October 2021.
  14. Sun-Kil Kwon (17 May 2012). "Study on the Temperature Independent Property of the Surface Coated Double Base Propellant" (PDF). The Korean Society of Propulsion Engineers. Archived from the original (PDF) on 17 October 2021. Retrieved 17 October 2021.
  15. Tae Soo Kwon (December 2014). "Study on the Temperature Independent Property of the Surface Coated Propellant for 105mm Armor Piercing Fin Stabilized Discarding Sabot Ⅰ". The Korean Society of Propulsion Engineers. Archived from the original on 29 March 2022. Retrieved 29 March 2022.
  16. Tae Soo Kwon (May 2015). "Study on the Temperature Independent Property of the Surface Coated Propellant for 105mm Armor Piercing Fin Stabilized Discarding Sabot Ⅱ". The Korean Society of Propulsion Engineers. Archived from the original on 29 March 2022. Retrieved 29 March 2022.
  17. Kim, Hyeong Gyu (June 2009). "Systems Analysis on Smart Ammunition for 120mm Tank Gun" (PDF). Korea Association of Defense Industry Studies. Archived from the original (PDF) on 30 March 2022. Retrieved 30 March 2022.
  18. Hyundai Rotem (31 July 2008). "터키 전차개발 기술협력 계약 체결". Hyundai Rotem. Archived from the original on 10 October 2021. Retrieved 10 October 2021.
  19. Kim Gwigeun (11 October 2009). "'흑표' 기술수출료 2014년까지 사용유예". Yonhap News. Archived from the original on 10 October 2021. Retrieved 10 October 2021.
  20. Choi Seunguk (20 October 2014). "[방산업계 울리는 ADD] 터키 수출 K-2전차 기술료 다 챙겨…'700억 돈잔치' 벌이겠다는 ADD". Korea Economic Daily. Archived from the original on 10 October 2021. Retrieved 10 October 2021.
  21. Army Recognition (1 October 2021). "Altay MBT Main Battle Tank". Army Recognition. Archived from the original on 4 December 2021. Retrieved 24 October 2021.
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