▁official ▁newspaper ▁K ras n aya ▁Z vez da ▁( Red ▁Star ), ▁stated ▁that ▁while ▁Su - 5 7 ▁is ▁currently ▁not ▁being ▁considered ▁for ▁the ▁I AF , ▁but ▁the ▁combat ▁aircraft ▁can ▁be ▁evaluated ▁once ▁it ▁joins ▁active ▁service ▁with ▁the ▁Russian ▁Air ▁Force . ▁ ▁Design ▁ ▁Although ▁there ▁is ▁no ▁reliable ▁information ▁about ▁the ▁PA K ▁FA ▁and ▁F G FA ▁specific ations ▁yet , ▁it ▁is ▁known ▁from ▁inter views ▁with ▁people ▁in ▁the ▁Russian ▁Air ▁Force ▁that ▁it ▁will ▁be ▁ste alth y , ▁have ▁the ▁ability ▁to ▁super c ru ise , ▁be ▁out f itted ▁with ▁the ▁next ▁generation ▁of ▁air - to - air , ▁air - to - sur face , ▁and ▁air - to - ship ▁miss iles , ▁and ▁incorpor ate ▁an ▁A ES A ▁( active ▁electron ically ▁sc anned ▁array ) ▁rad ar . ▁The ▁PA K ▁FA / F G FA ▁will ▁use ▁on ▁its ▁first ▁fl ights ▁ 2 ▁Sat urn ▁ 1 1 7 ▁engines ▁( about ▁ 1 4 7 . 1   k N ▁thrust ▁each ). ▁The ▁ 1 1 7 ▁is ▁an ▁advanced ▁version ▁of ▁the ▁AL - 3 1 F , ▁but ▁built ▁with ▁the ▁experience ▁gained ▁in ▁the ▁AL - 4 1 F ▁programme . ▁The ▁AL - 4 1 F ▁power ed ▁the ▁M iko yan ▁M FI ▁f ighter ▁( M iko yan ▁Project ▁ 1 . 4 4 ). ▁Later ▁versions ▁of ▁the ▁PA K ▁FA