Guerre du Vietnam Iran-Irak Guerre de 1982 Guerre du Liban Guerre du Golfe
Photo galery d’un Obusier M110A2, L’obusier automoteur M110 de 8 pouces (203 mm) était le plus grand obusier automoteur disponible dans l’armée des États-Unis.’l’inventaire. Il a été déployé dans l’artillerie de division dans des bataillons de soutien généraux et dans des bataillons séparés au niveau du corps et de l’armée. Les missions incluent le soutien général, le tir de contre-batterie, et la suppression des systèmes ennemis de défense aérienne. Le M110 a été exporté vers un certain nombre de pays. La M110A2 est la dernière version avec frein double museau, la version précédente A1 avait un museau ordinaire.
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Heavy Artillery for High Stakes
Lla M110A2was the ultimate evolution of the M110 series, designed to provide long-range, heavy-fire support to NATO corps. Unlike the turreted M109, the M110A2 featured an open-mount design to accommodate its massive 8-inch (203mm) barrel. It was a weapon of extremes: it could fire a 200-pound shell over 30 kilometers with pinpoint accuracy, or deliver tactical nuclear warheads to blunt a Soviet armored thrust. By the time the A2 variant arrived in 1978, it featured a massive double-baffle muzzle brake and a longer barrel to maximize the range of the newest high-explosive projectiles.
Attribute
Technical Specification (M110A2)
Rôle
Self-Propelled Heavy Howitzer
Crew
5 on vehicle (up to 8 additional in support vehicle)
Calibre
203 mm (8 inches)
Barrel Length
M201A1 cannon (approx. L/37)
Maximum Range
22,900 m (Standard) / 30,000 m (Rocket Assisted)
Rate of Fire
1 round every 2 minutes (Sustained) / 1.5 per minute (Burst)
moteur
Detroit Diesel 8V71T Turbocharged (405 hp)
Combat Weight
28.3 tonnes
Design Engineering: Physics of the Big Gun
The Double-Baffle Muzzle Brake:To handle the violent recoil of the 8-inch shells, the A2 variant was equipped with a large muzzle brake. This diverted the gasses outward and forward, pulling the barrel « loin » from the vehicle during firing to reduce the stress on the chassis.
The Rear Hydraulic Spade:Because the vehicle was relatively light compared to the size of its gun, it would literally flip over or roll backward from the recoil if not anchored. A massive hydraulic spade was lowered into the earth at the rear to transfer the energy of the shot directly into the ground.
The Loader-Rammer:Loading a 200lb shell by hand is impossible for a sustained period. The M110A2 used a hydraulic loading arm at the rear that lifted the shell from the ground or a support truck and rammed it into the breech automatically.
Open-Air Vulnerability:To keep the weight down and allow for the gun’s massive traverse and elevation, the crew worked in the open. They had zero protection from small arms fire, shrapnel, or NBC (Nuclear, Biological, Chemical) threats while firing, relying on speed and distance for survival.
Operational History: The Corps Level Asset
Nuclear Capability:During the Cold War, M110 units were a key part of NATO’s tactical nuclear deterrent, trained to fire the W33 and later the W79 nuclear shells.
Operation Desert Storm:The M110A2 saw its final major combat service during the 1991 Gulf War. British and American units used them to pulverize Iraqi fortifications, as the 8-inch shell’s explosive yield was significantly more effective than the standard 155mm for destroying deep bunkers.
The MLRS Replacement:The US Army retired the M110A2 in the 1990s, replacing its role with theM270 MLRS(Multiple Launch Rocket System), which offered even greater range and area saturation with fewer crew requirements.
Global Survivors:While retired by the US, the M110A2 remains in service with countries like Taiwan, Japan, and Turkey, where its massive « firepower per shot » is still highly valued for coastal and mountain defense.
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