Engine Model: RD-0155. Manufacturer Name: RD-0155. Designer: Kosberg. Developed in: 1998-. Application: Onega or Avrora (improved Soyuz) first stages. Propellants: Lox/Kerosene. Thrust(sl): 902.500 kN (202,890 lbf). Isp (sea level): 296 sec. Mass Engine: 1,150 kg (2,530 lb). Chambers: 2. Chamber Pressure: 176.00 bar. Country: Russia. Status: Design concept 2007. Engine proposed to replace RD-107 in Onega and Avrora improved versions of the Soyuz launch vehicle. The engine consists of two chambers, a fixed inner chamber and a gimbaled outer chamber. Chamber pressure in the fixed chamber, 180 kg/m2; in the gimbaled chamber, 160 kg/m2.
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