Information About

Su-122




  Length 695 m
  Width 300 m
  Height 232 m
  Weight 309 tonnes
  Suspension Christie
  Speed Road 55 km/h
  Range 300 km
  Primary 122 mm M-30S howitzer
  Secondary none
  Armour 45 mm
  Engine diesel model V-2
  Crew 4
  Engine Power 500 hp (375 kW)
  Pw Ratio 16 hp/tonne


The SU-122 (''Samokhodnaya Ustanovka–122'') was a Soviet self-propelled gun used during World War II .


HISTORY


The SU-122 was an assault gun which used the hull of the T-34 tank and was the result of an April 1942 specification for assault guns aimed with guns of 122 mm calibre or higher. The SU-122 was designed by the Uralsky Machine Building factory (UZTM). The first production SU-122s were built at the end of 1942, for a total of 25 vehicles.

The SU-122 did reasonably well in combat against the Wehrmacht , although the HEAT round for its gun didn't perform up to expectations. Production continued from 1942 until the early autumn of 1943 , for a total of roughly 1,150 SU-122s built. SU-122 was completely replaced by SU-85 in mass production for better anti-armour capabilities.


VARIANTS


Towards the end of the production run, SU-122s were built with the same ball mantlet as the later SU-85s, but are easily recognizable by the thicker, shorter gun barrel of the 122-mm M-30 howitzer .

The SU-122 had no variants that went into production, but there were several unsuccessful prototypes and minor variants. Various attempts were made to modernise and improve the SU-122, particularly in the area of simplification, to lower production costs.

The first attempt to modernise the SU-122 resulted in the SU-122M, which was armed with the 122-mm U-11 howitzer instead of the M-30 howitzer of the SU-122 itself. To accommodate the new gun, the gun compartment was altered. Though this design showed some promise, trials showed numerous defects: the SU-122M was less reliable than the original SU-122, cost more and was overloaded. It was therefore not taken into production.

The other attempt to create an improved SU-122 replacement was done by taking a SU-85 chassis and coupling it with the 122-mm D-6 howitzer, which was lighter and compacter than the U-11 howitzer. This again was not a success.

Finally, there was a small series of SU-122s built on the chassis of the SU-100 .


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