Harkonnen

https://btvt.info/7english/490_2gun_eng.htm

It resulted in completely different design.

Returning to History -

So you offer to install frontal armor on the tank rear or what?

What do you mean?

1976. Firing Cobra guided projectiles from T-64B and T-80B tanks during military trials of new types of T-64B and T-80B tanks with the Cobra system and the "Ob" FCS and T-72A with the TPD-K1. The hit rate at the beginning of the trials was 0.73 without counting failures, but with the failures taken into account it was only 0.57. It was necessary to improve the complex and at the second stage of same testing it was 0.87 and 0.73.

Documentary film T-80U with 6TD engine. Testing running qualities of the machine, the use of weapons, examination of new features in the form of built-in ERA. By Resolution No. 837-249 of the CPSU Central Committee and the USSR Council of Ministers dated 02.09.85. the 478B tank was accepted for serial production under the name “T-80U with 6TD engine” and in accordance with Order No. 510 of the Ministry of Defense of the USSR of 19.09.85. In parallel with the T-64B, it was mass-produced by the Malyshev plant. Malyshev plant. In total, 715 T-80U 715 T-80UDs were produced under the USSR, most of them ended up in the Russian Federation. The T-80UD partially corrected the failure of the development of the T-80U with VTDT-1000 gas turbine. https://t.me/btvt2019/9218 and became the last Soviet tank. Despite adoption of the T-80U with gas turbine in '85, it went into production only in 1991.