Army in 1963 and was used in the Vietnam War by the United States Army. The M110 howitzer first entered service with the U.S. The M110's range varied from 10.4 mi (16.8 km) to approximately 16 mi (25 km) when firing standard projectiles, and up to 19 mi (30 km) when firing rocket-assisted projectiles. Using the manual rammer was physically demanding, but crews were not required to lower the barrels as much as with the hydraulic rammer. Well trained and motivated crews could achieve two to four rounds per minute for short periods by using the manual rammer, essentially a heavy steel pole with a hard rubber pad on one end. These rammers were prone to breakdown and generally slowed operation of the gun because the rammers required crews to completely lower the massive barrel before using it. The M110 featured a hydraulically operated rammer to automatically chamber the 200+ pound projectile. Missions include general support, counter-battery fire, and suppression of enemy air defense systems.Īccording to the operator's manual, the M110's typical rate of fire was three rounds per two minutes when operated at maximum speed, and one round per two minutes with sustained fire.
Before its retirement from US service, it was the largest available self-propelled howitzer in the United States Army's inventory it continues in service with the armed forces of other countries, to which it was exported. The 8 inch (203 mm) M110 self-propelled howitzer is an American-made self-propelled artillery system consisting of an M115 203 mm howitzer installed on a purpose-built chassis.
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