First the general public were shown two aircraft PAK-FA with pylons for carrying weapons on the external load.
Trening of the Russian aircraft before victory parade to devoted 69th anniversary celebrations of Victory in the Great Patriotic War.
The plane bears a name of the known Soviet physicist, the developer of the Soviet nuclear bomb I.V. Kurchatov
The plane bears a name of the great Russian writer A.P. Chekhov.