in 2015 will test three new machines T-50, produced by the program a fifth generation fighter "Sukhoi PAK FA" (PAK FA). Told "Lente.ru" a source in the defense industry. According to the source, the program develops in the chart, despite the break with the conclusion of the test on the new fighter prototype last year. However, in 2015 to begin testing three new flight instance. "In 2014, the new machines to the test is not passed. This was due to the fact that the structure of the aircraft were made to refine the results of tests of the first five machines built before, "- said the source. The fighter T-50 produced in the Sukhoi PAK FA program, first took to the skies in 2010. Since February 2014 Fighter program passes state joint tests. At the moment, the number of copies of the flight to five machines. Serial deliveries of the aircraft to the troops to begin in 2016. Earlier it was reported that the current state armaments program for delivery of the Air Force 60 production aircraft PAK FA program until 2020.