Russia Air Force admits problems in 5th-generation jet engines

Russia's Air Force chief acknowledged on Thursday faults in engines for a fifth-generation fighter jet currently being developed. The Advanced Front-Line Aviation Complex (PAK FA) plane is set to replace the Air Force's fourth-generation fighters, namely, the Su-27 Flanker and the MiG-29 Fulcrum. Speaking at the MAKS air show outside Moscow, Alexander Zelin said: "For the time being the aircraft will use Saturn engines. There are problems, I admit, but research is continuing."

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