. Completed the inspection of the first production engine RD-108A working on a new propellant for the second stage of " Soyuz-2 ". About this Last news said Commissioners of the United engine Corporation, part of rostec. Naphthyl fuel instead of kerosene for the first time used in November 2017 with the launch of "Soyuz-2" From the East, then they refueled the third stage of the rocket. Any launch using naftel on the 1st and second stages of the Union have not had. Replacement of kerosene naftilos part of the program of modernization of the rocket " Soyuz-2 launches From the East. Propulsion units of RD-107/RD-108 equipped with the first and second stages all rockets family "Soyuz" for 60 years. Since 1958, they are produced in the JSC "Kuznetsov" in cooperation With JSC " NPO Energomash them. V. P. Glushko ". Prior to delivery details all products for the space program, as does the engine pass three-stage quality supervision. <span style="color:darkgray