152 mm mortar M1931 (NM)
name=152 mm mortar model 1931 (NM)
manufacturer=Plant No. 172
weight=combat: 1,150 kg
part_length=overall: 1,415 mm / 9.3 calibers
elevation=-2° to 72°
152 mm mortar M1931 (NM) ( _ru. 152-мм мортира образца 1931 года (НМ))Note that in case of the NM "mortar" stands for Russian "мортира" ("mortira") and not for "миномёт" ("minomyot"). In Russian, the former word is typically reserved for old muzzle loaded short barrel high trajectory cannons, but was also used to designate some Soviet guns, essentially howitzers with very short barrels. The latter word is used for modern infantry mortars, like the 120 mm and 160 mm pieces mentioned in this article.] was a 152.4 mm (6 inch) artillery piece originally developed by the German arms manufacturer
Rheinmetall. The gun was produced in limited numbers in the Soviet Unionand saw action with the Soviet Armyin World War II. A modified version of the design was also adopted in Germany, as 15 cm sIG 33.
The gun had monobloc barrel fitted with horizontal sliding breech. The
recoilsystem consisted of hydrauliccompressor and hydropneumatic recuperator, both mounted in the gun cradle. The recoil length was fixed. The carriage was of box trail type, with equilibrator, suspension and a folding spade. Metal wheels had removable rubber tires. The gun was equipped with a shield.
Development and production
The first 152 mm divisional mortar for the RKKA was developed in by
Kirov Plantin 1930. The gun weighed about 1,500 kg. It utilized a breechblock and other elements of the 152 mm fortress howitzer M1909. It is not clear whether the piece was ever completed.
From late 1920s, USSR looked for foreign assistance in modernizing its artillery. Germany could and was willing to offer such assistance. The cooperation with USSR allowed Germany, constrained by the
Treaty of Versailles, an opportunity to proceed with arms development. In 1929, German arms manufacturer Rheinmetallcreated a dummy company "Butast" for contacts with USSR. In accordance with the Sovnarkom decision from 8 August 1930, on 28 August in Berlin a secret agreement was signed. Germans undertook to help USSR with production of six artillery systems:
* 37 mm anti-tank gun
* 76 mm anti-aircraft gun
* 152 mm mortar
* 152 mm howitzer
* 20 mm anti-aircraft autocannon
* 37 mm anti-aircraft autocannonFor $1,125 mil. Rheinmetall supplied pre-production samples, documentation and parts from which in USSR a few pieces of each type could be assembled.
Among other pieces, Rheinmetall brought to USSR eight 152 mm mortars. The guns went through ground trials in June 1931 and were tested by the army in August 1932. The weapon was adopted as 152 mm mortar M1931. In the contemporary documents it is often referred to as N or NM.
The gun was in production from 1932 to 1935 at Plant no. 172 ("MZM" - Motovilikha Machinery Plant; _ru. МЗМ - Мотовилихинский завод машиностроения). The production continuously lagged behind the schedule. In 1932, 5 mortars were manufactured; in 1933 - 50, in 1934 – 59, and in 1935 – 15 pieces. During the production period the gun was repeatedly modified; for example, the barrel of was lengthened by 65 mm.
In 1937 a modernized variant was developed. This variant, designated ML-21, reached factory trials on
27 March 1937and ground and army trials in 1938. The trials revealed some minor defects. The ML-21 was never adopted.
Meanwhile, in Germany a modified variant of the original Rheinmetall design was adopted as
15 cm sIG 33.
*The original variant, supplied from Germany (8 pieces).
*The Soviet mass production variant with longer barrel (129 pieces).
*ML-21 (3 pieces).
The NM was experimentally mounted on
T-26tank chassis. The resulting self-propelled gun, designated SU-5-3, successfully underwent factory trials in 1934 and even took part in a parade at the Red Square. However, in 1935 the project was cancelled, because the T-26 chassis was considered too weak for a 152 mm piece. The fate of the prototype vehicle is unknown. There is an unconfirmed information that it was rebuilt as SU-5-2, armed with 122 mm howitzer M1910/30.
The NM was employed in divisional artillery, which from 1935 to June 1941 included a
battalionof 152 mm howitzers. On 1 November 1936RKKA possessed 104 pieces (including three practical and one non-operational). By June 1941 only 51 of them remained [ [http://www.soldat.ru/doc/mobilization/mob/table17.html Обеспеченность Красной Армии артиллерийскими орудиями на 22 июня 1941 г ] ] and, according to the historian M. Svirin, all these were in mobilization reserve. Some pieces saw combat early in Great Patriotic War. In 1942, new ballistic tables for the mortar were released.
Despite some advantages of the NM, notably its versatility and very light weight for a 152-mm piece, the production was cancelled after a limited number of guns were built. According to M. Svirin, complexity of the design was the main reason. For example, Soviet ordnance plants experienced major problems with production of sliding breechblocks. Also, the NM poorly fitted the Soviet artillery doctrine, mainly because of its range - too short for a divisional gun. The related German design - the 15 cm sIG 33 - was employed as a regimental weapon; it was somewhat heavy for a regimental piece, but better mechanization of
Wehrmachthelped to solve the problem. In the RKKA, the niche of heavy regimental weapon was filled by a 120 mm infantry mortar, a cheaper, lighter weapon with slightly longer range, but on the other hand less powerful, less accurate and less versatile. Eventually, a need for a divisional weapon more powerful than a 122 mm howitzer became apparent; in 1943 the RKKA adopted another infantry mortar, the 160 mm divisional mortar MT-13, which was similar to the NM in terms of weight, range and shell weight.
The mortar used separate loading ammunition. The cartridge case could contain five different propellant charges. In addition to an old HE shell, two new HE-Frag shells were developed. The "draft 4139" shell was produced in limited numbers and was no longer used by 1934.
*Shirokorad A. B. - "Encyclopedia of the Soviet Artillery" - Mn. Harvest, 2000 (Широкорад А. Б. - Энциклопедия отечественной артиллерии. — Мн.: Харвест, 2000., ISBN 985-433-703-0)
*Shirokorad A. B. - "Teutonic Sword and Russian Armor. Military Collaboration Between Russia and Germany." - M. Veche, 2003 (Широкорад А. Б. - Тевтонский меч и русская броня. Русско-германское военное сотрудничество. - М.: Вече, 2003., ISBN 5-9533-0025-5)
*Shirokorad A. B. - "Soviet Mortars an Rocket Artillery" - M. AST, 2000 (Широкорад А.Б. - Отечественные минометы и реактивная артиллерия. - М., АСТ, 2000., ISBN 5-17-001748-0)
*Ivanov A. - "Artillery of the USSR in Second World War" - SPb Neva, 2003 (Иванов А. Артиллерия СССР во Второй Мировой войне. — СПб., Издательский дом Нева, 2003., ISBN 5-7654-2731-6)
Wikimedia Foundation. 2010.
Look at other dictionaries:
152 mm howitzer M1943 (D-1) — D 1 howitzer … Wikipedia
152 mm gun M1935 (Br-2) — Infobox Weapon name=152 mm gun M1935 (Br 2) caption=Br 2 in the Central Museum of Armed Forces, Moscow. origin=USSR type=heavy gun is ranged= is bladed= is explosive= is artillery=yes is vehicle= is UK= service= used by= wars= designer=Barrikady… … Wikipedia
122 mm gun M1931/37 (A-19) — 122 mm gun M1931/37 (A 19) … Wikipedia
85 mm air defense gun M1939 (52-K) — 85 mm air defense gun M1939 (52 К) 52 K in Nizhny Novgorod Kremlin. Type Air defense gun Place of origin … Wikipedia
List of World War II topics (0-9) — # 1 Alpine Division Taurinense # 1 Alpini Regiment # 1 Cent WWII (Dutch coin) # 1 Mountain Artillery Regiment (Italy) # 1 vs 40 (Zipang manga) # 1. Jagd Division # 1.1 /75 caliber gun # 10 cm K 17 # 10.5 cm FlaK 38 # 10.5 cm leFH 16 # 10.5 cm… … Wikipedia
List of artillery by country — Argentina = * CITEFA Model 77 Cold War / Modern 155 mm gun/howitzer, based on the French 155mm gun mounted on AMX Mk F3 SP gun * CALA 30 155 mm L45 long range gun * SLAM PAMPERO 105 mm multiple rocket launcher * SAC SAPBA 127 mm multiple rocket… … Wikipedia
List of military vehicles — Military vehicles include all land combat and transportation vehicles, excluding rail based, which are designed for or are in significant use by military forces throughout the world. See also list of armoured fighting vehicles. Contents:… … Wikipedia
Список артиллерии СССР Второй мировой войны — Эмблема Артиллерии В список вошла артиллерия СССР, произведённая в межвоенный период и в период Второй мировой войны. В список не вошли опытные и не пошедшие в серийное производство образцы. Содержание … Википедия
Список артиллерии СССР периода Второй мировой войны — Эмблема Артиллерии В список вошла артиллерия СССР, произведённая в межвоенный период и в период Второй мировой войны. В список не вошли опытные и не пошедшие в серийное производство образцы. Содержание … Википедия