KH178

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 guns (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 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 but does not pay license fees when exporting. ==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. 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. • : 54 howitzers in 2010. • : 21 howitzers used by the Republic of Korea Army and the Republic of Korea Marine Corps. All retired in 2000. 6 transferred to Fiji in 2014. ==See also==