MOSCOW—The Russian military plans to use a new Sukhoi S-70 Okhotnik (Hunter) unmanned combat air vehicle to expand the radar coverage of the Su-57 fifth-generation fighter.  A video recently published by the Russian defense ministry showed a first joint flight of the two aircraft that presumably took place in a test center in Akhtubinsk, South Russia. The ministry reported that during the 30-min. flight, the S-70 flew in full automatic mode and demonstrated interoperability with ...


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