G.N. Moskvin suggested that part of the hull remain vertical and that floor remain flat. This solution did not require abandoning torsion bar suspension. The fuel would stored in between sheets of armor at the bottom of the tank. However this complexes welding and is not consistent with the all wedge hull that was originally envisioned. However G.N. Moskvin was replaced by S.V. Mickevich and worked further on his solution.
|The IS-2U in its final form|