The trials proving the flight performance of Russian fifth-generation fighter T-50 PAKFA (Russian acronym for future tactical fighter) have been virtually completed, Russian Deputy Defense Minister Yuri Borisov told the Russia 24 television broadcaster in an interview.

“Several aircraft are flying to test the avionics suite now. The tests of their flight characteristics have virtually been completed,” he said.

The delivery of the PAKFA is due in 2017. The T-50 powered by the so-called Stage II engine (or Product 30) will first fly in 2018. The Defense Ministry is to receive a total of 55 fifth-generation fighter before 2020. Later, Borisov warned that the ministry could adjust its PAKFA order due to the new economic situation and high performance of the Sukhoi Su-35S (NATO reporting name: Flanker-E) multi-role fighter.

The PAKFA has kicked off the testing of its weapons, with their characteristics checking with the manufacturer’s performance ratings. Air Force test pilots are testing the T-50’s capabilities at the Chkalov State Flight Test Center in Akhtubinsk. The T-50’s maiden flight took place in January 2010. Five aircraft of the type are in trials now.