Russia's New Su-57 Stealth Fighter Has A Big Problem That Won't Be Fixed Until 2025

Russia has started testing its new Sukhoi Su-57 PAK-FA fifth-generation fighter with its new next-generation Saturn izdeliye 30 engines. The flight-testing with the new engines will run for several years. In the meantime, the Russians will build a dozen Su-57s equipped with interim Saturn AL-41F1 afterburning turbofans producing 32,500lbs thrust each for operational testing.

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