The 9 cm mortar Type GR (German-Russian) was a World War I Russian mortar, developed circa 1915. It was a variant of captured Austro-Hungarian mortars 9 cm Minenwerfer M 14. 12,519 9 cm GR mortars were produced in 1915–1917 in Russia. Its shell is comparable in power to the modern 81 mm mortar shell.
Comparison of Russian Front mortars (1915—1917) Mortar nameCalibre (mm)Shell (kg)Propellant mass (kg)Muzzle velocity (metres/second)Mass of the mortar (kg)Rate of fire (rounds/minute)Maximum range (metres)9 cm mortar Type GR91bomb 3.30.7100464-5500Aasen mortar88.9grenade 1.20.4—24—40020-mm mortar20grenade 2.450.176133——Likhonin mortar48bomb 3.00.3416.816.5—500
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External links
http://s51.radikal.ru/i131/0810/3d/84794d10a32c.jpg http://ww1.milua.org/9minGR.htm