Evolutionary development is a common sight in tank development. The fact that engineers do not seek to make work for themselves should not be mistaken for laziness. This is often a necessary requirement set by the customer, especially when it is necessary to keep up the rate of production. For this reason, revolutionary projects were often vetoed from above. This happened with the KV-13 and T-34M in 1942 when both were put away until better days.
|Object 238 on trials, August 1943.
|85 mm ZIS-25 gun, precursor to the S-31.
|The ZIS-25 gun moved to the TsAKB in early 1943.
|A universal turret for the KV-13 and KV-1S equipped with an 85 mm S-31 gun.
|The turret made up for the ZIS-25's drawbacks, but the turret itself was a drawback. The NKTP did not want to build it.
|Conclusions on the TsAKB's turret, June 7th, 1943. This decision meant that the turret would not enter production.
|An analogous turret was built anyway in the fall of 1943, by which point it was no longer necessary.
|Draft of the Object 238, June 1943.
|Gun mount drawing. Note that the gun mantlet was altered.
|One of the two Object 238 prototypes, late July 1943.
|Both tanks were converted production KV-1S tanks.
|The only difference between the two tanks were the casting numbers on the back of the turret.
|Object 238 at the Gorohovets Proving Grounds.
|The tank had a low priority even before the trials began.
|Trials only confirmed the issues that ChKZ raised.
The Object 238 got lucky. One prototype was converted to test the aforementioned turret, the other was left as is. It was later sent to the NIBT Proving Grounds. The tank was not used in any more trials, but it was Kubinka's only KV-1S tank, and so it settled down in the proving grounds museum. Until recently, this was the only surviving KV-1S tank.
|Layout of the fighting compartment.
|Object 238 at Patriot Park.