The Alekseyev I-211 was a twin jet-engined soviet fighter developed from 1946 until 1948.
After having worked in the Lavochkin design bureau, the designer Semyon M. Alekseyev received permission to stablish his own design bureau in September 1946.
The first design of this newly stablished bureau was a single-seat fighter powered by two 1365Kgp Lyulka TR-1 axial-flow turbojets. Named the I-211, it had its' maiden flight in the autumn of 1947 but, considering that the engines were only performing at around 70% of their power, even if the handling was highly satifactory.
It was proposed to be armed with three 37mm cannons or two 52mm ones, but, apparently, they were never installed as they were expecting the better TR-1A engines which would be fitted in the second prototype, which was also kwnown as the I-215.
Sources:
1. https://en.wikipedia.org/wiki/Alekseyev_I-21
2. Salamander Books - The Complete Book of Fighters
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