The S-51 is an experimental Soviet heavy self-propelled artillery unit from the Great Patriotic War . This combat vehicle was developed in the fall of 1943 on the basis of the KV-1s heavy tank by the Central Artillery Design Bureau (TsAKB) under the leadership of Vasily Gavrilovich Grabin .

The S-51 is a Soviet tier 7 self-propelled gun. Designed and built on the chassis of the KV-1S. The development of a prototype started in January 1944. The 203-mm B-4 howitzer was mounted on the restored hull of a KV-1S. From March 1944 through to the beginning of April, the vehicle underwent trials.

The S-51 self-propelled artillery was an attempt by the Soviet army in the Great Patriotic War. The final product had amazing destructive power, but did not enter service.

2017年3月15日 · The self propelled S-51 howitzer consists of the oscillating part of the 203 mm mod. 1931 howitzer (B-4) installed on a KV-1S. The installation is done in the following way: The turret and turret ring are removed from the KV-1S.

2012年2月22日 · The main armament of the S-51 SPG was to be a modified 203,4 mm B-4 howitzer. The howitzer was openly mounted on the roof of the armored hull and had vertical aiming angles in the range from 0 to 60 degrees, the horizontal aiming sector was 40 degrees (20 in each direction).

VII S-51. SPG. This is a proposed field modification from skill4ltu for S-51. Skill4ltu's note: Doctor_Nix™ approved

In order to build a single prototype, only TsAKB submitted a draft SAU under the symbol "S-51" (or C-51) . The chassis of the KV-1S was considered for the base of the S-51, but it was quickly discovered that the length of the support-surface was insufficient and needed adjustment: a modified version with 7 or 8 rollers.

S-51 in early 1944 by nearly 300 design test and a series of wild march test, basically reached the requirements, Soviet firepower summarized as, machine power in artillery belonging to excellent. 43 years after the SU-152, ISU-152 type of either anti-tank and fire support, or the emergence of closed fighting compartment fighting vehicles, as ...

Developed by the Grabin Central Artillery Design Bureau in the fall of 1943. The S-51 passed trials successfully in the spring of 1944, but never entered mass production.

Along with its counterpart the SU-14-1, the S-51 carries a massive-for-its-tier 203mm gun, but it pays dearly for that power. Similar to the G.W. Tiger (p) and SU-14-1, it has high damage for its tier (and is often overkill against tanks below its tier), but at the cost of low accuracy, long reload, and low mobility.