tier VII SPG made in U.S.S.R.. Wargaming Tankpedia technical details »
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. Despite successful trials, the S-51 never entered mass production.
I personally play this artillery with 152mm BR-2 Gun. Same situation as with SU-14-1. I think the best cannon is not the best solution. Of course who likes to enjoy the big gun 203mm B-4, let him try and see for himself if I'm right. But when he misses a couple of times in a row, and the reloading time is 40 seconds, he will accept my advice. Mobility is very poor. One of the slowest artillery. So don't expect much from this artillery.
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*Numbers are total experience points earned in a battle..