Development was prolonged by the evacuation of the design bureau forced by the German advance on Moscow in the fall of 1941.

By the time the second prototype was finished the Soviets had fighters with equivalent or better performance already in production and the program was cancelled.

In November 1940, Nikolai Polikarpov proposed a heavy cannon-armed fighter for bomber escort duties and ground attack missions.

[2] The ITP was a low-wing, mixed construction monoplane with a wooden monocoque fuselage made from 'shpon', molded birch plywood.

The curved, one-piece windshield lacked a flat front panel which gave the pilot a rather distorted view.