The Russian Aerospace Forces will get four serial fifth-generation Su-57 fighters in December, a source in the defence industry has told Sputnik.
"In December, the aircraft plant in Komsomolsk-on-Amur will supply the Russian Aerospace Forces with four serial fighters Su-57", the source said.
According to the source, the Russian Aerospace Forces are currently testing the only serial Su-57 aircraft they have received.
