7.58 cm Minenwerfer
Overview
 
The 7.58 cm Minenwerfer a.A. (alter Art or old model) (7.58 cm leMW) was a German
Germany
Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

 First World War mortar
Mortar (weapon)
A mortar is an indirect fire weapon that fires explosive projectiles known as bombs at low velocities, short ranges, and high-arcing ballistic trajectories. It is typically muzzle-loading and has a barrel length less than 15 times its caliber....

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The Russo-Japanese War
Russo-Japanese War
The Russo-Japanese War was "the first great war of the 20th century." It grew out of rival imperial ambitions of the Russian Empire and Japanese Empire over Manchuria and Korea...

 of 1905 had shown the value of mortars against modern fieldworks and fortifications and the Germans were in the process of fielding a whole series of mortars before the beginning of World War I. Their term for them was Minenwerfer, literally mine-thrower, and they were initially assigned to engineer units in their siege warfare role.
Encyclopedia
The 7.58 cm Minenwerfer a.A. (alter Art or old model) (7.58 cm leMW) was a German
Germany
Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

 First World War mortar
Mortar (weapon)
A mortar is an indirect fire weapon that fires explosive projectiles known as bombs at low velocities, short ranges, and high-arcing ballistic trajectories. It is typically muzzle-loading and has a barrel length less than 15 times its caliber....

.

History

The Russo-Japanese War
Russo-Japanese War
The Russo-Japanese War was "the first great war of the 20th century." It grew out of rival imperial ambitions of the Russian Empire and Japanese Empire over Manchuria and Korea...

 of 1905 had shown the value of mortars against modern fieldworks and fortifications and the Germans were in the process of fielding a whole series of mortars before the beginning of World War I. Their term for them was Minenwerfer, literally mine-thrower, and they were initially assigned to engineer units in their siege warfare role. By the Winter of 1916-17 they were transferred to the infantry where the leMW's light weight permitted them to accompany the infantry in the advance.

In common with Rheinmetall's other Minenwerfer
Minenwerfer
Minenwerfer is the German name for a class of short range mortars used extensively during the First World War by the German Army...

 designs the leMW was a rifled muzzle-loader and had hydraulic cylinders on each side of the tube to absorb the recoil forces and spring recuperators to return the tube to firing position. It had a rectangular firing platform with limited traverse and elevation. Wheels could be added to ease transportation or it could be carried by at least six men. In 1916 a new version, designated as the n.A. or neuer Art, was fielded that had a new circular firing platform that added a turntable which permitted a full 360 degree of traverse. It also had a longer 16 inches (406.4 mm) barrel and could be used for direct fire between 0° and 27° elevation if the new 90 kg (200 lb) trail was fitted to absorb the recoil forces. In this mode it was pressed into service as an anti-tank gun.

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