This page no longer updated from 31 October 2001. Latest version can be found at S5.92

Other Designations: S5.92. Designer: Isayev. Developed in: 1966-1987. Application: Phobos propulsion module. Used on stages: Fregat. Used on launch vehicles: Soyuz 11A511U / Fregat, Soyuz ST / Fregat. Used on spacecraft: Fobos 1F. Propellants: N2O4/UDMH Thrust(vac): 2,000 kgf. Thrust(vac): 19.60 kN. Isp: 327 sec. Burn time: 2,000 sec. Mass Engine: 75 kg. Diameter: 0.8 m. Length: 1.0 m. Chambers: 1. Chamber Pressure: 97.00 bar. Area Ratio: 153.80. Oxidizer to Fuel Ratio: 2.00. Country: Russia. Status: Out of Production. References: 293 . Comments: Gas generator cycle. Nominal and low-thrust thrust levels. Low thrust version with 1400 kgf, chamber diameter of 0.68 m, chamber pressure of 67 bar, specific impulse 316 seconds. Chamber pressure 97 / 67. Specific impulse 327 / 316 sec.
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Last update 12 March 2001.
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© Mark Wade, 2001 .