Sukhoi has completed the first flight of its fifth prototype T-50/PAK FA stealth fighter at Komsomolsk-on-Amur, the company announces in a 28 October media release.

The NPO Saturn 117-powered aircraft flew for 50min and conducted stability and propulsion system tests, says Sukhoi, adding that the pilot reported that the aircraft’s system performed reliably.

After completing initial test flights, the aircraft will join four other T-50/PAK FA aircraft for more testing at Russia's flight test centre outside Moscow in Zhukovsky, says the company.

The T-50/SAK FA first flew on 29 January 2010, and the five initial aircraft have completed more than 450 flights, according to Sukhoi.