The KH178 ("Korean Howitzer 1 (First) 78") is a South Korean

105 mm 105 mm (4.1 in) is a common NATO-standard artillery and tank gun calibre. The rifled tank round is defined by STANAG 4458. The artillery round is defined by AOP-29 part 3 with reference to STANAG 4425. Artillery Since the early 21st century, mos ...

caliber In guns, particularly firearms, but not #As a measurement of length, artillery, where a different definition may apply, caliber (or calibre; sometimes abbreviated as "cal") is the specified nominal internal diameter of the gun barrel Gauge ( ...

towed

howitzer The howitzer () is an artillery weapon that falls between a cannon (or field gun) and a mortar. It is capable of both low angle fire like a field gun and high angle fire like a mortar, given the distinction between low and high angle fire break ...

. It was designed and developed by the

Agency for Defense Development The Agency for Defense Development (ADD, ) is the South Korean government agency for research and development in defense technology, funded by the Defense Acquisition Program Administration (DAPA). It was established in August 1970 under the ban ...

(ADD) for the

Republic of Korea Armed Forces The Republic of Korea Armed Forces (), also known as the ROK Armed Forces, are the armed forces of South Korea. The ROK Armed Forces is one of the largest and most powerful standing armed forces in the world with a reported personnel strength o ...

and manufactured by

Hyundai WIA Hyundai WIA Corporation (), formerly known as WIA (World Industries Ace; ) is a member of the Hyundai Motor Group and is the second biggest automotive parts manufacturer in South Korea. As one of the core companies of Hyundai Motor Group, it i ...

History

In 1976, the plan for a domestic 105 mm howitzer design was scrapped, and the factories began preparing for mass production of KM101A1 with assistance from the United States. In June, South Korea continued its development work by importing two newly introduced British 105mm

L118 light gun The L118 light gun is a 105 mm towed howitzer. It was originally designed and produced in the United Kingdom for the British Army in the 1970s. It has since been widely exported. The L119 and the United States Army's M119 are variants that use a ...

s (an air-portable towed howitzer) for evaluation. In 1977, the mass production of KM101 began and South Korea quickly boosted manufacturing capacity. In March 1978, South Korea obtained partial blueprints of the

West German West Germany was the common English name for the Federal Republic of Germany (FRG) from its formation on 23 May 1949 until its reunification with East Germany on 3 October 1990. It is sometimes known as the Bonn Republic after its capital c ...

105 mm lightweight howitzer and produced an operational sample, which contributed to the further development of the new howitzer. After a series of technical breakthroughs South Korea launched the developed KH178 105 mm howitzer to replace the M101. Since KH178 is based on the technology of M101A1, South Korea requires US approval when exporting the howitzer. By the time KH178 began development,

NATO The North Atlantic Treaty Organization (NATO ; , OTAN), also called the North Atlantic Alliance, is an intergovernmental organization, intergovernmental Transnationalism, transnational military alliance of 32 Member states of NATO, member s ...

members were fielding artillery such as the 155mm

FH70 The FH70 (field howitzer for the 1970s) is a towed 155 mm howitzer used by several nations. History In 1963, NATO agreed a NATO Basic Military Requirement 39 for close support artillery, either towed or tracked. Subsequently, Germany and UK ...

and

M198 howitzer The M198 is a medium-sized, towed 155 mm artillery piece, developed for service with the United States Army and Marine Corps. It was commissioned to be a replacement for the World War II-era M114 155 mm howitzer. It was designed and prototyped a ...

developed under a Joint Ballistics Memorandum of Understanding standard—increasing maximum firing range to 30 km. Due to changing battlefield environment and to support joint operations with the US, the Republic of Korea Armed Forces started development of the KH179 155 mm towed howitzer in 1979. The decision led to continuation of mass production of KM101A1 rather than KH178 for cost efficiency. Since 1983, only 18 KH178 howitzers were delivered to the

Army An army, ground force or land force is an armed force that fights primarily on land. In the broadest sense, it is the land-based military branch, service branch or armed service of a nation or country. It may also include aviation assets by ...

and the

Marine Corps Marines (or naval infantry) are military personnel generally trained to operate on both land and sea, with a particular focus on amphibious warfare. Historically, the main tasks undertaken by marines have included raiding ashore (often in supp ...

. All howitzers were retired in 2000.

Design

The overall characteristic is similar to the M101A1 howitzer. KH178 is designed as a division artillery for a counter-battery role with agile positioning benefited from its light weight. The howitzer has a longer 38 caliber progressive twist rifling barrel, which provides a longer range of with standard ammunition and with RAP ammunition—compared to 22 caliber with EFC of 7,500 rounds. The cannon is made up of a tube, breech mechanism, muzzle brake, and locking ring. The tube is made of high strength alloy steel, heat-treated and autofrettaged to provide maximum life. The firing mechanism is a continuous pull (self-cocking) type. The weapon is fired by pulling a lanyard. It returns to firing position when releasing a lanyard. The carriage is single axle and split trail. The trails spread at emplacement, but draw together and lock for travel. The carriage consists of an equilibrator, shield, elevating mechanism, cradle, traversing mechanism, top carriage, wheels and trails. The carriage traversal is a screw type. The recoil mechanism is a hydro-pneumatic system that absorbs the energy/recoils by forcing oil through orifices and returns the gun to ready by compressed gas. It is installed in the cradle of the carriage and attached to the cradle and the barrel. The gun maintains traverse of ±23° (±409 mils) for easier direct fire targeting during close combat, which frequently occurred during the

Korean War The Korean War (25 June 1950 – 27 July 1953) was an armed conflict on the Korean Peninsula fought between North Korea (Democratic People's Republic of Korea; DPRK) and South Korea (Republic of Korea; ROK) and their allies. North Korea was s ...

. Indirect fire instruments includes the panoramic telescope KM12A8 and telescope mount KM21A2. Direct fire instruments includes the elbow telescope KM16A2, and fire control range quadrant KM4A3. The howitzer has an elevation of -5° (-89 mils) to 65° (1,156 mils) to engage enemies from higher position, and can fire both anti-personnel and anti-tank ammunitions. It can fire maximum of 15 rds/min or 3 to 5 rds/min for sustain. KH178MK1 has GPS and inertial navigation for faster operation and improved accuracy.

Operators

Current operators

* : 16 howitzers in 1991, used by the

Chilean Marine Corps The Chilean Marine Corps () is an entity of the Chilean Navy special forces which specializes in amphibious assaults. History The Marine Corps was born with the establishment of the first armed forces of an independent Chile: the Corps was f ...

. * : 6 howitzers granted by South Korea in 2014 to replace

Ordnance QF 25-pounder The Ordnance QF 25-pounder, or more simply 25-pounder or 25-pdr, with a calibre of 3.45 inches (87.6 mm), was a piece of field artillery used by British and Commonwealth forces in the Second World War. Durable, easy to operate and versatile, ...

s to use as ceremonial guns. * : 54 howitzers in 2010.Upgraded KH178 artillery system offers more range - Indo14-Day3
- Janes.com, 7 November 2014 * : 18 howitzers in 1983, used by the

Republic of Korea Army The Republic of Korea Army (ROKA; ), also known as the ROK Army or South Korean Army, is the army of South Korea, responsible for ground-based warfare. It is the largest of the military branches of the Republic of Korea Armed Forces with 365,0 ...

and the

Republic of Korea Marine Corps The Republic of Korea Marine Corps (ROKMC; ), also known as the ROK Marine Corps, ROK Marines or South Korean marines, is the naval infantry of South Korea. The ROKMC is a branch of the Republic of Korea Navy responsible for amphibious operat ...

. All retired in 2000. 6 transferred to Fiji in 2014.

References

External links