Encyclopedia Astronautica
N2O4/UDMH



8k84back.jpg
8K84 back
Credit: © Mark Wade
Nitrogen tetroxide became the storable liquid propellant of choice from the late 1950's. Unsymmetrical Dimethylhydrazine ((CH3)2NNH2) became the storable liquid fuel of choice by the mid-1950's. Development of UDMH in the Soviet Union began in 1949. It is used in virtually all storable liquid rocket engines except for some orbital manoeuvring engines in the United States, where MMH has been preferred due to a slightly higher density and performance.

Nitrogen tetroxide consists principally of the tetroxide in equilibrium with a small amount of nitrogen dioxide (NO2). The purified grade contains less than 0.1 per cent water. Nitrogen tetroxide (N2O4) has a characteristic reddish-brown colour in both liquid and gaseous phases. The solid tetroxide is colorless. N2O4 has an irritating, unpleasant acid-like odour. N2O4 is a very reactive, toxic oxidiser. It is non-flammable with air; however, it will inflame combustible materials. It is not sensitive to mechanical shock, heat, or detonation. Nitrogen dioxide is made by the catalytic oxidation of ammonia; steam is used as a diluent to reduce the combustion temperature. Most of the water is condensed out, and the gases are further cooled; the nitric oxide is oxidised to nitrogen dioxide, and the remainder of the water is removed as nitric acid. The gas is essentially pure nitrogen tetroxide, which is condensed in a brine-cooled liquefier. 1959 production amounted to 60,000 tonnes per year. In carload lots of one-ton cylinders, the price was $ 0.15 per kg. By 1990 NASA was paying $ 6.00 per kg due to environmental regulations.

Unsymmetrical dimethylhydrazine (UDMH) is 98 to 99 per cent pure and is described by Military Specification MIL-D-25604. The normally expected impurities are dimethylamine and water. UDMH is a clear, hygroscopic liquid which yellows on exposure to air. It absorbs oxygen and carbon dioxide. UDMH is a toxic volatile liquid. It exhibits the sharp ammoniacal or fishy odour which is characteristic of organic amines. It is completely miscible with water, ethanol, and most petroleum fuels. It is not shock sensitive. The vapours are flammable in air over 2.5 to 95 per cent concentration range. UDMH can be produced commercially by nitrosation of dimethylamine, to N-nitro-sodimethylrtmine, followed by reduction of the intermediate to UDMH and subsequent purification. UDMH can be prepared, also, by a modification of the Raschig process (see discussion of hydrazine), in which the chloramine intermediate is with dimethylamine rather than with ammonia. The price in 1959 for tank-car quantities was under $ 1.00 per kg. Engineering studies indicated a price of $ 1.00 per kg with large scale sustained production. But due to its toxic nature, production and transport costs soared in response to environmental regulations. By the 1980's NASA was paying $ 24.00 per kg.

Oxidizer: N2O4. Fuel: UDMH. Propellant Formulation: N2O4/UDMH. Optimum Oxidizer to Fuel Ratio: 2.61. Temperature of Combustion: 3,415 deg K. Ratio of Specific Heats: 1.25. Density: 1.18 g/cc. Characteristic velocity c: 1,720 m/s (5,640 ft/sec). Isp Shifting: 285 sec. Isp Frozen: 273 sec. Oxidizer Density: 1.450 g/cc. Oxidizer Freezing Point: -11 deg C. Oxidizer Boiling Point: 21 deg C. Fuel Density: 0.793 g/cc. Fuel Freezing Point: -57 deg C. Fuel Boiling Point: 63 deg C.

Location: 1720.
Specific impulse: 333 s.
Specific impulse sea level: 285 s.

More... - Chronology...


Associated Spacecraft
  • LK-1 Russian manned lunar flyby spacecraft. Cancelled 1965. The LK-1 was the spacecraft designed by Chelomei for the original Soviet manned lunar flyby project. More...
  • LEAP American manned lunar flyer. Study 1961. LEAP was an early 1960's British design for getting disabled astronauts on the lunar surface quickly to lunar orbit for ferrying home. More...
  • LM Langley Light American manned lunar lander. Study 1961. This early open-cab single-crew Langley lunar lander design used storable propellants, resulting in an all-up mass of 4,372 kg. More...
  • Apollo CSM American manned lunar orbiter. 22 launches, 1964.05.28 (Saturn 6) to 1975.07.15 (Apollo (ASTP)). The Apollo Command Service Module was the spacecraft developed by NASA in the 1960's as a standard spacecraft for earth and lunar orbit missions. More...
  • LK-700 Russian manned lunar lander. Chelomei's direct-landing alternative to Korolev's L3 manned lunar landing design. Developed at a low level 1964 to 1974, reaching mockup and component test stage. More...
  • Apollo CSM Block I American manned spacecraft. The Apollo Command Service Module was the spacecraft developed by NASA in the 1960's as a standard spacecraft for earth and lunar orbit missions. More...
  • Almaz APOS Russian manned space station. Cancelled 1966. The initial Almaz program planned in 1965 consisted of two phases. More...
  • Apollo SM American manned spacecraft module. 22 launches, 1964.05.28 (Saturn 6) to 1975.07.15 (Apollo (ASTP)). More...
  • Gemini - Double Transtage American manned lunar orbiter. Study 1965. In June 1965 astronaut Pete Conrad conspired with the Martin and McDonnell corporations to advocate an early circumlunar flight using Gemini. More...
  • LK-1 PAO Russian manned spacecraft module. Cancelled 1965. Calculated masses, specific impulse based on mission requirements and drawing of spacecraft. Equipment-engine section. More...
  • Gemini Lunar Surface Rescue Spacecraft American manned lunar lander. Study 1966. This version of Gemini would allow a direct manned lunar landing mission to be undertaken in a single Saturn V flight, although it was only proposed as an Apollo rescue vehicle. More...
  • Gemini LSRS LM American manned spacecraft module. Study 1966. Calculated mass based on mission requirements, drawing of spacecraft, dimensions of propellant tanks. More...
  • Gemini LSRS AM American manned spacecraft module. Study 1966. Calculated mass based on mission requirements, drawing of spacecraft, dimensions of propellant tanks. More...
  • Gemini LSRS LOIM American manned spacecraft module. Study 1966. Calculated mass based on mission requirements, drawing of spacecraft, dimensions of propellant tanks. More...
  • Rescue Gemini American manned rescue spacecraft. Study 1966. A version of Gemini was proposed for rescue of crews stranded in Earth orbit. This version, launched by a Titan 3C, used a transtage for maneuvering. More...
  • Apollo RM American logistics spacecraft. Study 1967. In 1967 it was planned that Saturn IB-launched Orbital Workshops would be supplied by Apollo CSM spacecraft and Resupply Modules (RM) with up to three metric tons of supplies and instruments. More...
  • Big Gemini AM American manned spacecraft module. Reached mockup stage 1967. Earth orbit maneuver and retrofire. More...
  • Gemini LSSS LM American manned spacecraft module. Study 1967. Calculated mass based on mission requirements, drawing of spacecraft, dimensions of propellant tanks. More...
  • Gemini LORV SM American manned spacecraft module. Study 1967. Calculated mass based on mission requirements, drawing of spacecraft, dimensions of propellant tanks. More...
  • Gemini Lunar Surface Survival Shelter American manned lunar habitat. Study 1967. Prior to an Apollo moon landing attempt, the shelter would be landed, unmanned, near the landing site of a stranded Apollo Lunar Module. More...
  • Gemini LORV American manned lunar orbiter. Study 1967. This version of Gemini was studied as a means of rescuing an Apollo CSM crew stranded in lunar orbit. The Gemini would be launched unmanned on a translunar trajectory by a Saturn V. More...
  • LK-700 Block 1 Russian manned spacecraft module. Study 1968. Three identical stages of 34,491 kg each clustered around the core. Translunar Injection Stage. More...
  • LK-700 Block 11 Russian manned spacecraft module. Study 1968. Differed from the lateral Block 1 stages in having an engine unit for orientation of the assembly. Main engine of 23,500 kgf and three engines for soft landing / midcourse maneuvers of 1,670 kgf each. Midcourse manoeuvre/lunar braking stage. More...
  • LK-700 VA Russian manned spacecraft module. Study 1968. VA Re-entry Capsule. More...
  • LK-700 Block 1V Russian manned spacecraft module. Study 1968. Main engine of 13,400 kgf and three engines for soft landing / midcourse maneuvers of 1,670 kgf each. Trans-earth injection / midcourse manoeuvre stage. More...
  • Transtage American space tug. Flown 1968-1982 on Titan 3A and 3C boosters. Transtage mass remaining after insertion of Dynasoar and Abort Stage into orbit. Transtage had its own RCS. Maneuver in earth orbit. More...
  • LK Russian manned lunar lander. 3 launches, 1970.11.24 (Cosmos 379) to 1971.08.12 (Cosmos 434). The LK ('Lunniy korabl' - lunar craft) was the Soviet lunar lander - the Russian counterpart of the American LM Lunar Module. More...
  • Soyuz 7K-LOK Russian manned lunar orbiter. 2 launches, 1971.06.26 (N-1 6L) to 1972.11.23 (LOK). The two-crew LOK lunar orbiting spacecraft was the largest derivative of Soyuz developed. More...
  • LOK PAO Russian manned spacecraft module. 2 launches, 1971.06.26 (N-1 6L) to 1972.11.23 (LOK). Unique PAO developed for Soyuz lunar orbiter. Powerful sophisticated engine for lunar orbit rendezvous maneuvers and trans-earth injection. Equipment-engine section. More...
  • Almaz OPS-2 Russian manned space station. Cancelled 1979. The initial Almaz military space station program planned in 1965 consisted of two phases. More...
  • LK-3 Russian manned lunar lander. Reached mock-up stage, 1972. The LK-3 was Chelomei's preliminary design for a direct-landing alternative to Korolev's L3 manned lunar landing design. More...
  • Almaz OPS Russian manned space station. 3 launches, 1973.04.03 (Salyut 2) to 1976.06.22 (Salyut 5). Vladimir Chelomei's Almaz OPS was the only manned military space station ever actually flown. More...
  • Almaz Russian manned space station. 3 launches, 1973.04.03 (Salyut 2) to 1976.06.22 (Salyut 5). Chelomei's Almaz space station was designed to conduct orbital research into the usefulness of manned observation of the earth. More...
  • LEK VS Russian manned spacecraft module. Study 1973. Ascent stage, carried a crew of three from the lunar surface to trans-earth trajectory. Contained within the pressurized cabin was a Soyuz descent module for reentry by the crew into the earth's atmosphere. Ascent stage - Carry crew and Soyuz descent module from lunar surface to trans-earth trajectory. Provide crew quarters and midcourse corrections during return journey from lunar surface to earth.. More...
  • LEK PS Russian manned spacecraft module. Study 1973. Descent stage very similar in appearance to that of Apollo LM, with same function - descent from lunar orbit to landing of crewed module on surface of moon. Landing stage - Carry LEK ascent stage from lunar orbit to lunar surface; act as launching platform for LEK ascent stage.. More...
  • Soyuz 7K-S Russian manned spacecraft. 3 launches, 1974.08.06 (Cosmos 670) to 1976.11.29 (Cosmos 869). The Soyuz 7K-S had its genesis in military Soyuz designs of the 1960's. More...
  • MTKVA Russian manned spaceplane. Study 1974. Manned lifting body spaceplane, designed by Soviet engineers as a recoverable spacecraft in the early 1970's. More...
  • TKS Russian manned spacecraft. 4 launches, 1977.07.17 (Cosmos 929) to 1985.09.27 (Cosmos 1686). More...
  • Salyut 6 Russian manned space station. One launch, 1977.09.29. The Salyut 6 space station was the most successful of the DOS series prior to Mir. It was aloft for four years and ten months, completing 27,785 orbits of the earth. More...
  • TKS FGB Russian manned spacecraft module. 4 launches, 1977.07.17 (Cosmos 929) to 1985.09.27 (Cosmos 1686). Orbital Living and Service Module. More...
  • Soyuz T Russian manned spacecraft. 18 launches, 1978.04.04 (Cosmos 1001) to 1986.03.13 (Soyuz T-15). Soyuz T had a long gestation, beginning as the Soyuz VI military orbital complex Soyuz in 1967. More...
  • Soyuz T PAO Russian manned spacecraft module. 18 launches, 1978.04.04 (Cosmos 1001) to 1986.03.13 (Soyuz T-15). Improved PAO service module derived from Soyuz 7K-S with pressure-fed main engines and unitary RCS/main engine propellant feed system. Equipment-engine section. More...
  • 37K-Mir Russian manned space station. Cancelled 1983. The basic 37K design consisted of a 4.2 m diameter pressurized cylinder with a docking port at the forward end. It was not equipped with its own propulsion system. More...
  • Salyut 7 Russian manned space station. One launch, 1982.04.19. Salyut 7 was the back-up article for Salyut 6 and very similar in equipment and capabilities. More...
  • OK-M1 Russian manned spaceplane. Study 1984. The OK-M1 manned spaceplane was designed by NPO Molniya as a follow-on to the OK-M of NPO Energia. The OK-M1 was an integrated part of a unique launch vehicle, the MMKS reusable multi-module space system. More...
  • OK-M2 Russian manned spaceplane. Study 1984. The OK-M2 was a manned spaceplane, a straight delta wing joined to a broad fuselage with an upturned nose. More...
  • OK-M Russian manned spaceplane. Study 1984. 1980's design for a spaceplane, smaller than Buran, to replace Soyuz and Progress spacecraft for space station crew rotation/replenishment tasks. More...
  • Mir Russian manned space station. One launch, 1986.02.20. Improved model of the Salyut DOS-17K space station with one aft docking port and five ports in a spherical compartment at the forward end of the station. More...
  • Soyuz TM Russian manned spacecraft. 34 launches, 1986.05.21 (Soyuz TM-1) to 2002.04.25 (Soyuz TM-34). More...
  • Almaz-T Russian civilian surveillance radar satellite. 3 launches, 1986.11.29 (Almaz-T s/n 303 Failure) to 1991.03.31 (Almaz 1). The results of the manned Almaz flights showed that manned reconnaissance from space was not worth the expense. More...
  • Soyuz TM PAO Russian manned spacecraft module. 34 launches, 1986.05.21 (Soyuz TM-1) to 2002.04.25 (Soyuz TM-34). Further improvement of Soyuz T PAO service module with pressure-fed main engines and unitary RCS/main engine propellant feed system. Equipment-engine section. More...
  • LOK Energia PAO Russian manned spacecraft module. Study 1988. The LOK provided a pressurized volume for three crew. Within the cabin was a descent module of the same configuration as Soyuz, but almost 50% larger. Equipment-engine section - Lunar orbit maneuver, trans-orbit propulsion, pressurized crew quarters.. More...
  • LK Energia VS Russian manned spacecraft module. Study 1988. Although similar in appearance to LEK ascent stage, 80% smaller and no descent module for reentry into earth's atmosphere. Ascent from lunar surface to lunar orbit, dock with LOK Energia.. More...
  • LK Energia PS Russian manned spacecraft module. Study 1988. Descent stage similar in appearance to Apollo LM and LEK stages, but of differing dimensions. Descent from lunar orbit to lunar surface, launch platform for ascent stage.. More...
  • Progress M Russian logistics spacecraft. Operational, first launch 1989.08.23 (Progress M-1). Progress M was an upgraded version of the original Progress. New service module and rendezvous and docking systems were adopted from Soyuz T. More...
  • Progress M PAO Russian manned spacecraft module. Operational, first launch 1989.08.23 (Progress M-1). Improved PAO service module derived from Soyuz 7K-S with pressure-fed main engines and unitary RCS/main engine propellant feed system. Equipment-engine section. More...
  • Zarya NO Russian manned spacecraft module. Cancelled 1989. Maneuver system consisted of two engines, each of 300 kgf. Expendable module for orbital maneuvering and experiments. More...
  • Briz K Russian space tug. 6 launches, (1990) to (2002). Upper stage / space tug - in production. Launched by Rokot. Briz KM differed from Briz K in having 'compact' components, and a special payload truss for the Globalstar dispenser. More...
  • Almaz-1B Russian civilian surveillance radar satellite. Study 1993. More...
  • Almaz-2 Russian civilian surveillance radar satellite. Study 1995. Plans for an even more sophisticated and capable civilian Almaz 2 spacecraft were made in the early 1990's. Almaz 2's payload mass of 6. More...
  • Briz M Russian space tug. 2 launches, (1999) to (2000). Upper stage / space tug - in production. New upper stage for Proton, replacing Energia Corporation's Block DM, making Proton an all-Khrunichev launch vehicle. More...
  • Ikar Russian space tug. Study 1999. Upper stage / space tug - in production. Launched by Soyuz. Derived from propulsion module of Yantar spy satellite, over 30 flights to 1998. 50 restarts. More...
  • Soyuz TMA Russian three-crew manned spacecraft. Operational, first launch 2002.10.30. Designed for use as a lifeboat for the International Space Station. After the retirement of the US shuttle in 2011, Soyuz TMA was the only conveying crews to the ISS. Except for the Chinese Shenzhou, it became mankind's sole means of access to space. More...
  • Soyuz TMA PAO Russian manned spacecraft module. Operational. First launch 2002.10.30. Further improvement of Soyuz T PAO service module with pressure-fed main engines and unitary RCS/main engine propellant feed system. Equipment-engine section. More...
  • Angara Briz M Russian space tug. Study 2004. Upper stage / space tug - in development 2004. Launched by Angara launch vehicle family.. 8 restarts. Propellant ration 2.0:1. More...

Associated Engines
  • 11D23 Kosberg N2O4/UDMH rocket engine. 230.5 kN. Study 1968. Engine used in Block 1 and Block 11 stages of LK-700 manned lunar lander. More...
  • 11D431 Melnikov N2O4/UDMH rocket engine. 6 N. Yantar-2K orbital propulsion. In Production. Orbital propulsion system of the Yantar-2K military satellite, including one 11D430, four 11D431, four 11D446, and eight 11D428. Up to 150,000 ignitions. More...
  • 11D458 Isayev N2O4/UDMH rocket engine. 0.392 kN. In Production. Isp=252s. Small attitude control thruster in Briz upper stage propulsion system S5.98M. Total summmary impulse 14,112 kg-s. Minimum impulse 4 kg-s. Specific impulse also reported as 275 sec. More...
  • 11D446 Melnikov N2O4/UDMH rocket engine. 0.052 kN. Yantar-2K orbital propulsion. In Production. Orbital propulsion system of the Yantar-2K military satellite, including one 11D430, four 11D431, four 11D446, and eight 11D428. Up to 40,000 ignitions. More...
  • 11D445 Melnikov N2O4/UDMH rocket engine. 0.065 kN. Yantar-2K descent propulsion. In Production. Propulsion system of the Yantar-2K military satellite descent capsule. Up to 10,000 ignitions. Thrust from 0,065 - 0,012 kN. More...
  • 11D43 Glushko N2O4/UDMH rocket engine. 1642 kN. Developed 1960-64. Isp=316s. Low-expansion ratio gimbaled variant for Proton stage 1 concept. Configuration 4 x 8D43 clustered with 4 x 11D43 abandoned in favor of 6 x Glushko 11D48 in final Proton design. More...
  • 11D428 Melnikov N2O4/UDMH rocket engine. 0.110 kN. Yantar-2K orbital propulsion. In Production. Orbital propulsion system of the Yantar-2K military satellite, including one 11D430, four 11D431, four 11D446, and eight 11D428. Up to 40,000 ignitions. More...
  • 11D416 Isayev N2O4/UDMH rocket engine. 16.4 kN. Study 1968. Three of these engines used for midcourse corrections and soft lunar landing in Block 11 and Block 1V stages of LK-700 manned spacecraft. More...
  • 11D423 Izotov N2O4/UDMH rocket engine. 134 kN. LK-700S manned lunar lander ascent stage engine. Development ended 1968. Isp=326s. Based UR-100 stage 2 engine. Gas generator cycle; 2 large turbine exhaust pipes. More...
  • 11D430 Melnikov N2O4/UDMH rocket engine. 29.430 kN. Yantar-2K orbital propulsion. In Production. Orbital propulsion system of the Yantar-2K military satellite, including one 11D430, four 11D431, four 11D446, and eight 11D428. Up to 50 ignitions. Isp=307s. Chamber Pressure: 9.00 bar. More...
  • 11D79 Stepanov N2O4/UDMH rocket engine. 44 kN. Blok D SOZ. In Production. Thrust 1.1-4.5 tf variable. More...
  • 15D13 Klimov N2O4/UDMH rocket engine. 131.4 kN. Study 1968. Main engine for midcourse Block 1V ascent/trans-earth injection stage of LK-700 manned spacecraft. See also 11D423. More...
  • 17D58E Isayev N2O4/UDMH rocket engine.13 N. In Production. Isp=247s. Small attitude control thruster used in Briz, Briz-M upper stage propulsion system S5.98M. More...
  • 17D61 Melnikov N2O4/UDMH rocket engine. 2.943 kN. Ikar stage 4 for Soyuz-Ikar. Design 1999. Isp=325s. Derived from propulsion module of Yantar spysat, with over 30 flights to 1998. Increased versatility compared to Block L due to capability for 50 restarts. More...
  • 4D10 Isayev N2O4/UDMH rocket engine. 255 kN. R-27 / RSM-25 (SS-N-6). Out of Production. First engine system to be submerged in propellant tank. One main engine chamber plus unknown number (probably 4) of steering thrusters. Thrust 226 + 29 kN. More...
  • 8D423 Izotov N2O4/UDMH rocket engine. 131 kN. Production from 1964. Isp=325s. Single chamber engine for UR-100 stage 2. Gas generator cycle with two large turbine exhaust pipes. First flight 1965. More...
  • 8D43 + 11D43 Kosberg N2O4/UDMH rocket engine. 2247.450 kN. Design 1962. Isp=310s. Originally the first stage of the Proton was designed for 4 x fixed 11D43 and 4 x gimballed Kosberg 8D43; replaced by 6 x 11D48 from Glushko in final Proton design. More...
  • 8D43 Kosberg N2O4/UDMH rocket engine. 559 kN. UR-500 stage 1 original concept. Hardware. Isp=316s. In early Proton design would be clustered with 4 x Glushko 11D43. Abandoned in favor of 6 x Glushko 11D48, but later developed into the RD-0208 and RD-0210. More...
  • 8D725 Glushko N2O4/UDMH rocket engine. 117 kN. Developed 1963-1970. 10 to 12 tonne thrust engine developed for an unstated military requirement. Isp=325s. More...
  • Burlak Stage 1 Russian N2O4/UDMH rocket engine. 360 kN. Burlak stage 1. Development ended 1992. Isp=320s. Air launched from Tu-160 at 13,500 m, Mach 1.7 release conditions. More...
  • Burlak Stage 2 N2O4/UDMH rocket engine. 98 kN. Burlak stage 2. Development ended 1992. Isp=330s. Air launched from Tu-160 at 13,500 m, Mach 1.7 release conditions. More...
  • CZ-1C-3 Chinese N2O4/UDMH rocket engine. 107.9 kN. Development ended 1988. Isp=287s. Used on CZ-1C launch vehicle. More...
  • DMT-600 Isayev N2O4/UDMH rocket engine. 0.600 kN. In Production. Bi-propellant hypergolic (self-igniting) engine, pressure-fed. 6,000 ignitions Isp=300s. More...
  • DST-200 Isayev N2O4/UDMH rocket engine. 0.200 kN. In Production. Bi-propellant hypergolic (self-igniting) engine, pressure-fed. 10,000 ignitions Isp=280s. More...
  • DST-200A Isayev N2O4/UDMH rocket engine. 0.20 kN. In Production. Bi-propellant hypergolic engine, pressure-fed. Larger nozzle and reduced chamber pressure to increase performance and lifetime compared to DST-200. 100,0000 ignitions. Isp=300s. More...
  • DST-100 Isayev N2O4/UDMH rocket engine. 0.100 kN. In Production. Bi-propellant hypergolic (self-igniting) engine, pressure-fed. 10,000 ignitions Isp=276s. More...
  • DST-25 Isayev N2O4/UDMH rocket engine. 0.025 kN. In Production. Bi-propellant hypergolic (self-igniting) engine, pressure-fed. 300,000 ignitions Isp=285s. More...
  • DST-100A Isayev N2O4/UDMH rocket engine. 0.100 kN. In Production. Bi-propellant hypergolic engine, pressure-fed. Larger nozzle and reduced chamber pressure to increase performance and lifetime in comparison to DST-100. 450,0000 ignitions. Isp=304s. More...
  • KDU-426 Isayev N2O4/UDMH rocket engine. 3.089 kN. Soyuz-T orbital correction engine. In Production. Pressure-fed engine. Used as long duration engine for correction orbits of satellites. Isp=292s. More...
  • KRD-442 Isayev N2O4/UDMH rocket engine. 4.38 / 0.17 kN. Orbital propulsion for FGB-derived modules for Mir and ISS. In Production. Main and low-thrust mode. Operation of turbopump without chamber used to pump propellants into tanks from Progress tankers. More...
  • KRD-61 Isayev N2O4/UDMH rocket engine. 18.8 kN. Luna Ye-8. Out of Production. Spacecraft maneuvering engine for ascent stage of Luna moon sample return missions. Isp=313s. First flight 1969. More...
  • KRD-79 Isayev N2O4/UDMH rocket engine. 3.090 kN. Salyut 6, 7and Mir orbital propulsion maneuvering engine. In Production. Probably derived from engine of propulsion system KDU-426. Pressure fed engine. More...
  • KTDU-425 Isayev N2O4/UDMH rocket engine. 18.850 kN. Mars 2 and 3 maneuver engine. Out of Production. Pump-fed engine. Could be throttled to 7.05 kN / 9.5 MPa / 2850 m/s. . Chamber pressure 133,2 - 95 bar. Isp=312s. More...
  • KTDU-425A Isayev N2O4/UDMH rocket engine. 18.890 kN. Mars 4-7, Venera 9-16, Vega 1-2, and Phobos 1-2 maneuvering engine. Out of Production. Could be throttled to 9.86/9.5/2870. Chamber pressure 149 - 95 bar. Isp=315s. First flight 1973. More...
  • KTDU-417-B Isayev N2O4/UDMH rocket engine. 3.430 kN. Luna 15-24 used this low thrust engine in system KTDU-417 for soft-landing on the moon. Out of Production. Isp=254s. Pressure-fed engine; could be throttled to 2.06 kN. More...
  • KTDU-80 Isayev N2O4/UDMH rocket engine. 6.190 kN. Soyuz TM, Progress M. In Production. Isp=326s. Propulsion system included 4 spherical tanks for a total of 880 kg propellant. Developed from NII Mash experimental thruster. 3 thrust levels by 4 valves. More...
  • NII 612 kgf NII Mash N2O4/UDMH rocket engine. 6 kN. experimental 612.25 kgf / 0.071 tf / 0.031tf. Developed. Experimental thruster, 3 thrust levels by 4 valves: 6000 N, 0.7 N, 0.3 N. Specific impulse 326 - 286 sec. Isp=286s. More...
  • PF N204/UDMH-2165k Notional N2O4/UDMH rocket engine. 21,232 kN. Study 1967. Isp=267s. Used on Saturn LCB-Storable-250 launch vehicle. More...
  • PF N204/UDMH-2912k Notional N2O4/UDMH rocket engine. 28,552 kN. Study 1967. Isp=267s. Used on Saturn LCB-Storable-140 launch vehicle. More...
  • Press Fed 1000k TRW N2O4/UDMH rocket engine. 9793 kN. Study 1968. 1960's designs for 'big dumb booster'. Isp=300s. Used on LCLV launch vehicle. More...
  • Press Fed 200k TRW N2O4/UDMH rocket engine. 2028 kN. Study 1968. 1960's designs for 'big dumb booster'. Isp=306s. Used on LCLV launch vehicle. More...
  • Press Fed 5748k TRW N2O4/UDMH rocket engine. 56,368 kN. Study 1968. 1960's designs for 'big dumb booster'. Isp=267s. Used on LCLV launch vehicle. More...
  • R6-117 Chelomei N2O4/UDMH rocket engine. 132 kN. LK-1 Blok A. Developed 1964-66. Developed in cooperation with OKB-117 on the basis of the latter's main engine for the UR-100 stage II. More...
  • RD-0257 Kosberg N2O4/UDMH rocket engine. R-36M2 / RS-20V (SS-18 Mod-4) stage 2 vernier. Out of Production. Steering engine of system RD-0255. Gas generator cycle. First flight 1987. More...
  • RD-0236 Kosberg N2O4/UDMH rocket engine. 15.760 kN. UR-100N / RS-18 (SS-19) stage 2 vernier. Out of Production. Developed in 1969-1974 / problems not solved until 1978. Vernier engines. Gas generator cycle. Isp=293s. More...
  • RD-0235 Kosberg N2O4/UDMH rocket engine. 240 kN. UR-100N / RS-18 (SS-19) stage 2. Main engine based on RD-0217 with larger nozzle for altitude operation. Staged combustion cycle. Isp=320s. First flight 1972. More...
  • RD-0234 Kosberg N2O4/UDMH rocket engine. 520 kN. UR-100N / RS-18 (SS-19) stage 1. Out of Production. Staged combustion cycle. Modification of RD-0233 including tank pressurization system. Isp=310s. First flight 1974. More...
  • RD-0237 Kosberg N2O4/UDMH rocket engine. 4.9 kN. UR-100N / RS-18 (SS-19) stage 3. MIRV service block. Open cycle. Analogous to RD-0225, pressure fed. Steering engine for space vehicles gimbaling +/- 45 degree. Isp=200s. First flight 1972. More...
  • RD-0232 Kosberg N2O4/UDMH rocket engine. UR-100N / Rokot Stage 1. Engine unit (DU - dvigatelnaya ustanovka) consisting of 1 RD-0234 for tank pressurization and three RD-0233. First flight 1972. More...
  • RD-0246 Kosberg N2O4/UDMH rocket engine. Design concept. Project for further development of RD-0243. More...
  • RD-0231 Kosberg N2O4/UDMH rocket engine. 29 kN. P-700 Granit. Out of Production. Staged combustion cycle. Isp=275s. First flight 1970. More...
  • RD-0233 Kosberg N2O4/UDMH rocket engine. 520 kN. UR-100N / RS-18 (SS-19) stage 1. Out of Production. Staged combustion cycle. Isp=310s. First flight 1974. More...
  • RD-0230 Kosberg N2O4/UDMH rocket engine. R-36M / RS-20A (SS-18 mod-1) stage 2 vernier. Out of Production. Vernier engine. Gas generator cycle. First flight 1974. More...
  • RD-0242 Kosberg N2O4/UDMH rocket engine. 123.6 kN. sea-based missile booster stage developed 1977-83. Isp=302s. First concept planned N2O4/kerosene as propellant, but changed to N2O4/UDMH. Single ignition, 297 development tests. 50 engines for sale. More...
  • RD-0243 Kosberg N2O4/UDMH rocket engine. 825.8 kN. R-29RM stage 1. Out of Production. Isp=300s. Consisted pf single-chamber main engine RD-0244 plus four-chamber steering engines RD-0245 driven by turbine exhaust gas. Engine submerged in propellant tank. More...
  • RD-0245 Kosberg N2O4/UDMH rocket engine. 211 kN. R-29RM / RSM-54 (SS-N-23) stage 1 vernier. Out of Production. Four-chamber steering engine in system RD-0243 driven by turbine exhaust gas. Isp=300s. First flight 1985. More...
  • RD-0250 Kosberg N2O4/UDMH rocket engine. Further development of RD-0235 main engine for projected modification of stage 2 of classified Chelomei rocket. Development ceased during study phase. Staged combustion cycle. More...
  • RD-0251 Kosberg N2O4/UDMH rocket engine. Further development of RD-0236 steering engine for projected modification of stage 2 of classified Chelomei rocket. Development ceased during study phase. Gas generator cycle. More...
  • RD-0255 Kosberg N2O4/UDMH rocket engine. 755 kN. R-36M2 / RS-20V (SS-18 Mod-4) stage 2. Comprises of single-chamber main engine RD-0256 plus four-chamber steering engines RD-0257. Development based on RD-0228 with thrust increase by 11%. First flight 1986. More...
  • RD-0256 Kosberg N2O4/UDMH rocket engine. R-36M2 / RS-20V (SS-18 Mod-4) stage 2. Out of Production. Main engine of system RD-0255. Staged combustion cycle. First flight 1987. More...
  • RD-0211 Kosberg N2O4/UDMH rocket engine. 582.1 kN. Proton stage 2. Out of Production. Variant of RD-0210 providing tank pressurization. Staged combustion cycle. Isp=326s. More...
  • RD-0244 Kosberg N2O4/UDMH rocket engine. 682 kN. R-29RM / RSM-54 (SS-N-23) stage 1. Out of Production. Main engine in system RD-0243. Staged combustion cycle. Submerged in propellant tank. Isp=310s. First flight 1985. More...
  • RD-0206 Kosberg N2O4/UDMH rocket engine. 575.5 kN. UR-200 stage 2. Developed 1961-64. Staged combustion cycle. Isp=326s. First flight 1964. More...
  • RD-0213 Kosberg N2O4/UDMH rocket engine. 582.1 kN. Proton stage 3. Design 1962. Version of RD-0210. Staged combustion cycle (Oxidizer pre-burner gas routed to main chamber after driving turbine). Main engine for Proton Stage 3 in system RD-0212. Isp=326s. More...
  • RD-0229 Kosberg N2O4/UDMH rocket engine. R-36M / RS-20A (SS-18 mod-1) stage 2. Out of Production. Main engine. Staged combustion cycle. Used on Ikar launch vehicle. First flight 1974. More...
  • RD-0202 Kosberg N2O4/UDMH rocket engine. 2236 kN. UR-200 stage 1. Engine unit (DU - dvigatelnaya ustanovka) consisting of 1 RD-0204 for tank pressurization and three RD-0203. Isp=311s. First flight 1963. More...
  • RD-0203 Kosberg N2O4/UDMH rocket engine. 559 kN. UR-200 stage 1. Hardware. DU consisting of 4 RD-0204 gimballed motors. Staged combustion cycle. Isp=311s. First flight 1964. More...
  • RD-0205 Kosberg N2O4/UDMH rocket engine. 606.4 kN. UR-200 stage 2. Engine unit consisting of 1 RD-0206 maine engine and 4 RD-0207 vernier/steering engines. Version of 8D44 and 8D45 with extended nozzle. Developed 1961. Isp=322s. First flight 1963. More...
  • RD-0207 Kosberg N2O4/UDMH rocket engine. 30.9 kN. UR-200 stage 2 vernier. Developed 1961-64. Gas generator cycle. Four vernier thrusters. Isp=297s. First flight 1964. More...
  • RD-0208 Kosberg N2O4/UDMH rocket engine. UR-200 stage 1. Developed 1961-65. Stage 1 had three RD-0208 plus one RD-0209. Further developed into RD-0210. More...
  • RD-0209 Kosberg N2O4/UDMH rocket engine. UR-200 stage 1. Developed 1961-65. Engine unit consisting of 1 RD-0211 for tank pressurization and three RD-0210. Modification of RD-0208 with tank pressurization. Further developed into RD--0211. First flight 1965. More...
  • RD-0221 Kosberg N2O4/UDMH rocket engine. 78 kN. upper stage of unnamed missile by Mishin. Developed 1965-70. Isp=330s. More...
  • RD-0204 Kosberg N2O4/UDMH rocket engine. 559 kN. UR-200 stage 1. Hardware. Diameter is per chamber. Staged combustion cycle. Variant of RD-0203 with additional pressure sensor. Isp=311s. First flight 1964. More...
  • RD-0225 Kosberg N2O4/UDMH rocket engine. 3.923 kN. Almaz space station orbital maneuvering. Hardware. Originally designed for UR-100 follow-ons spaceships. Two engines used on Almaz space station for orbital maneuvering, Pressure fed. Isp=287s. First flight 1974. More...
  • RD-0210 Kosberg N2O4/UDMH rocket engine. 582.1 kN. Isp=326s. Cluster of four similar engines used in second stage of Proton - one providing tank pressurization (8D412K/RD-0211) and three (8D411K/RD-0210). Staged combustion cycle. First flight 1965. More...
  • RD-0217 Kosberg N2O4/UDMH rocket engine. 219 kN. UR-100, UR-100K stage 1. Out of Production. Staged combustion cycle. Version of RD-0216 without tank pressurization system. Manufacturing until 1974, operational use until 1991. Isp=313s. More...
  • RD-0216 Kosberg N2O4/UDMH rocket engine. 219 kN. UR-100 stage 1. Isp=313s. Staged combustion cycle. Includes tank pressurization system (RD-0217 without tank press.). First launch November 1963, manufactured until 1974, operational until 1991. First flight 1965. More...
  • RD-0215 Kosberg N2O4/UDMH rocket engine. 2450 kN. Developed 1962-65 for heavy Chelomei launcher (UR-900?) stage 1. Isp=310s. Engine unit consisting of 1 RD-0217 for tank pressurization and three RD-0216. Hardware not hot-tested. More...
  • RD-0214 Kosberg N2O4/UDMH rocket engine. 30.980 kN. Proton stage 3 vernier. In Production. Based on RD-0207. Four used as steering engines for Proton Stage 3 in system RD-0212. Isp=293s. First flight 1967. More...
  • RD-0212 Kosberg N2O4/UDMH rocket engine. 613 kN. Proton stage 3. Engine unit consisting of 1 RD-0213 maine engine and 4 RD-0214 vernier/steering engines. 8D48 essentially similar to 8D411 and 8D412 and has the same combustion chamber. Isp=324s. First flight 1967. More...
  • RD-0228 Kosberg N2O4/UDMH rocket engine. 755 kN. R-36M / RS-20A (SS-18 mod-1) stage 2. Out of Production. Comprises single-chamber main engine RD-0229 plus four-chamber steering engine RD-0230. Further developed to RD-0255. More...
  • RD-263 Glushko N2O4/UDMH rocket engine. 1155 kN. R-36M / RS-20A (SS-18 Mod 1) stage 1. Out of Production. Four RD-263 engines combined into RD-264 system. Isp=318s. More...
  • RD-253 Glushko N2O4/UDMH rocket engine. 1745 kN. In Production. Version of RD-253 with thrust increased by 7%. Included an additional gas generator for tank pressurization. First flight 1986. More...
  • RD-275 Glushko N2O4/UDMH rocket engine. 1745 kN. Proton stage 1. In Production. Uprated version of RD-253, developed in the 1980's. Isp=317s. First flight 1986. More...
  • RD-274 Glushko N2O4/UDMH rocket engine. 4952 kN. Developed 1975-85. Upgrade of RD-264 engine with increased chamber pressure and thrust. Development stopped due to problems with turbopump shaft balance. More...
  • RD-273 Glushko N2O4/UDMH rocket engine. 1238 kN. Developed 1975-82. Upgrade of RD-263 in 1982 based on RD-263F project. More...
  • RD-270 Glushko N2O4/UDMH rocket engine. 6713 kN. UR-700, R-56 stage 1. Development ended 1968. Isp=322s. Developed 1962-1971, largest rocket engine ever built in the Soviet Union, answer to F-1. Tested but cancelled before combustion instability problems solved. More...
  • RD-268 Glushko N2O4/UDMH rocket engine. 1236 kN. MR-UR-100 / RS-16 (SS-17) stage 1. Out of Production. First flight 1976. Modification of RD-263 engine. Isp=319s. First flight 1990. More...
  • RD-264 Glushko N2O4/UDMH rocket engine. 4521 kN. R-36M / RS-20A (SS-18 Mod 1) stage 1. Consists of four RD-263 engines. Isp=318s. Used on Dnepr launch vehicle. First flight 1986. More...
  • RD-263F Glushko N2O4/UDMH rocket engine. Developed 1980. Project to upgrade RD-263. Upgrade was realized in RD-273 engine. More...
  • RD-251 Glushko N2O4/UDMH rocket engine. 2643 kN. R-36-0 stage 1, Tsyklon 2 stage 1. In production. Assembly of 3 RD-250-type units. Isp=301s. First flight 1965. More...
  • RD-261 Glushko N2O4/UDMH rocket engine. 3032 kN. Tsyklon 3 stage 1. In production. Based on RD-251 Isp=301s. First flight 1977. More...
  • RD-254 Glushko N2O4/UDMH rocket engine. 1716 kN. N-1 upper stage, UR-700 stage 3. Study 1961. Proposed for use in N-1. High altitude version of RD-253 for 2nd stages. First flight 1974. More...
  • RD-253-UR-700 Glushko N2O4/UDMH rocket engine. 1745 kN. Designed 1964-1968. UR-700 Stage 3. Development of RD-253 with increased expansion ratio for upper stage use. More...
  • RD-250 Glushko N2O4/UDMH rocket engine. 881 kN. R-36-0 stage 1, Tsyklon 2 stage 1. Out of Production. Assembly of 3 RD-250 units make RD-251. Isp=301s. More...
  • RD-253-11D48 Glushko N2O4/UDMH rocket engine. 1635 kN. Isp=316s. Six gimballed single chamber RD-253s provide the first stage power for the UR-500 Proton launch vehicle. First flown in 1965. More...
  • RD-253-14D14 Glushko N2O4/UDMH rocket engine. 1746 kN. Proton KM-1. In production. Developed in 1990s. Isp=317s. First flight 1999. More...
  • RD-252 Glushko N2O4/UDMH rocket engine. 940.5 kN. R-36-0 stage 2; Tsyklon 2 stage 2. In production. Used modified chamber from RD-219, nozzle is conventional, so performance is higher. Isp=317s. First flight 1965. More...
  • RD-262 Glushko N2O4/UDMH rocket engine. 941 kN. Tsyklon 3 stage 2. In production. Based on RD-252 Isp=317s. First flight 1977. More...
  • RD-68M Yuzhnoye N2O4/UDMH rocket engine. 285 kN. R-36 stage 1 attitude control engine. Out of Production. 4 nozzles, maximum 42 degree gimbal angle. More...
  • RD-69M Yuzhnoye N2O4/UDMH rocket engine. 54.3 kN. R-36 stage 2 attitude control engine. Out of Production. 4 nozzles, maximum 50 degree gimbal angle. More...
  • RD-858 Yuzhnoye N2O4/UDMH rocket engine. 20.1 kN. Isp=315s. Primary engine for LK manned lunar lander. Propulsion cluster provided the variable thrust needed for a soft landing onto the lunar surface, then restarted for injection into lunar orbit. Flown 1970. More...
  • RD-861K Yuzhnoye N2O4/UDMH rocket engine. 77.630 kN. Tsyklon 2 and 3 stage 3; Ikar. Developed 2005. Isp=330s. High pressure fuel was used to gimbal the engine in two planes, replacing four thrust vector engines on the basic RD-861. More...
  • RD-869 Yuzhnoye N2O4/UDMH rocket engine. 8.580 kN. R-36M2 vehicle bus. Based on RD-864. Two thrust levels. The four thrusters swing out of the stage housing before use. Chamber pressure 41 / 17 bar. Diameter 3,0 / 4,02 m. Isp=313s. First flight 1986. More...
  • RD-868 Yuzhnoye N2O4/UDMH rocket engine. 23.250 kN. Apogee stage. Developed 1983-. Isp=325s. In development in 1996. One main and an unknown number of control thrusters. 23.25 + 0.03 kN. Chamber pressure 91.5 / 6.9 bar. Specific impulse 325 / 230 sec. More...
  • RD-866 Yuzhnoye N2O4/UDMH rocket engine. 5.2 kN. RT-23 MIRV-bus. Out of Production. Isp=305s. Engine consisted of two turbopumps with gas generators and two feeders; a single chamber main engine; and 16 liquid thrusters for attitude control and translation. More...
  • RD-864 Yuzhnoye N2O4/UDMH rocket engine. 20.2 kN. R-36M vehicle bus. Out of Production. Isp=309s. Two thrust levels. The four thruster swing out of the stage housing before use. Chamber pressure 41 / 17 bar. Specific impulse 309 / 298 sec. More...
  • RD-863 Yuzhnoye N2O4/UDMH rocket engine. 276.840 kN. MR-UR-100 / RS-16 (SS-17) stage 1 attitude control engine. Out of Production. Isp=301s. More...
  • RD-862 Yuzhnoye N2O4/UDMH rocket engine. 142.630 kN. MR-UR-100 / RS-16 (SS-17) stage 2. Out of Production. Based on RD-857. Thrust vector control by secondary gas injection into nozzle. Roll control via special small jet nozzles. Isp=331s. More...
  • RD-861 Yuzhnoye N2O4/UDMH rocket engine. 78.710 kN. Tsyklon 2 and 3 stage 3; Ikar. In production. Isp=317s. Based on RD-854. Thrust vector control by 4 nozzles (thrust 98 N each) fed from a gas generator. First flight 1965. More...
  • RD-854 Yuzhnoye N2O4/UDMH rocket engine. 75.5 kN. R-36orb (SS-X-10) orbital stage. Out of Production. Thrust vector control by 4 nozzles fed from gas generator. Isp=312s. More...
  • RD-859 Yuzhnoye N2O4/UDMH rocket engine. 20.050 kN. LK lunar lander reserve engine. Hardware. Isp=312s. Backup engine for the LK manned lunar lander in the event the primary RD-858 engine failed. Restart within three seconds after shut down. Flight tests 1970. More...
  • RD-860 Yuzhnoye N2O4/UDMH rocket engine. 5.9 kN. Upper stages. Developed 1972. Isp=320s. Engine used a novel scheme combining an existing proven combustion chamber but using a pneumatic pump for propellant supply. More...
  • RD-857 Yuzhnoye N2O4/UDMH rocket engine. 137.3 kN. RT-20P missile stage 2. Out of production. Isp=329s. Designed for second stage of mixed propulsion missile, only flight tests. Thrust vector control by secondary gas injection into nozzle. First flight 1967. More...
  • RD-856 Yuzhnoye N2O4/UDMH rocket engine. 54.230 kN. Tsyklon stage 2 attitude control engine. Out of Production. Isp=280s. Autonomous four-chamber pump-fed single-run engine burned hypergolic propellants in a gas generator scheme. More...
  • RD-855 Yuzhnoye N2O4/UDMH rocket engine. 328 kN. Tsyklon stage 1 attitude control engine. Out of Production. Isp=292s. Four-chamber pump-fed single-run engine burned hypergolic propellants in a gas generator scheme. More...
  • RD-861G Yuzhnoye, Fiat Avio N2O4/UDMH rocket engine. 76.453 kN. Vega upper stage. Developed 1996-. Isp=325s. Proposed uprate of RD-861 engine. Thrust vector control by gimbal, roll control by 4 nozzles (thrust 29 N each). More...
  • RDMT-100 NII Mash N2O4/UDMH rocket engine. 0.100 kN. Salyut, Mir, Soyuz-T and -TM, Progress, Kosmos-satellites. In Production. Low-thrust attitude control thruster. Isp=260s. More...
  • RDMT-8 X NII Mash N2O4/UDMH rocket engine. 8 N. Developed 1980's. Experimental low-thrust thruster. Isp=296s. More...
  • RDMT-50 NII Mash N2O4/UDMH rocket engine. 0.050 kN. Kosmos satellites. In Production. Low-thrust attitude control thruster. Isp=255s. More...
  • RDMT-400A NII Mash N2O4/UDMH rocket engine. 0.400 kN. Developed 1980's. Experimental low-thrust thruster. Niobium combustion chamber with coating. Isp=290s. More...
  • RDMT-400 X NII Mash N2O4/UDMH rocket engine. 0.400 kN. Developed 1980's. Experimental low-thrust thruster. Carbon combustion chamber. Mass may be chamber only. Isp=296s. More...
  • RDMT-400 NII Mash N2O4/UDMH rocket engine. 0.400 kN. Almaz, Kvant, Kristall, Spektr, Priroda. In Production. Low-thrust attitude control thruster. Used in Isayev 11D458 engine. Isp=255s. More...
  • RDMT-200 NII Mash N2O4/UDMH rocket engine. 0.200 kN. Almaz. In Production. Low-thrust attitude control thruster. Isp=255s. More...
  • RDMT-12 NII Mash N2O4/UDMH rocket engine. 12 N. Almaz, Kvant, Kristall, Spektr, Priroda. In Production. Low-thrust attitude control thruster. Predecessor was RDMT-400. Used in Isayev 17D58E engine. Isp=279s. More...
  • RDMT-0.4 X NII Mash N2O4/UDMH rocket engine. 400 mN. In Production. Experimental low-thrust thruster. Chamber from niobium alloy. Chamber pressure 41 / 17 bar. Specific impulse 313 / 302,3 sec. Isp=290s. More...
  • RDMT-135 NII Mash N2O4/UDMH rocket engine. 0.135 kN. Salyut, Mir, Soyuz-T and -TM, Progress, Kosmos-satellites. In Production. Low-thrust attitude control thruster. Isp=260s. More...
  • S5.51 Isayev N2O4/UDMH rocket engine. 33.196 kN. Hardware 1969. Isp=314s. Complex engine used to maneuver the LOK to a rendezvous with the LK lander in lunar orbit, then propel the LOK out of lunar orbit. Verniers included for midcourse corrections. More...
  • S5.92 Isayev N2O4/UDMH rocket engine. 19.6 kN. Phobos propulsion module, later adapted as Fregat upper stage. In production. Isp=327s. Gas generator cycle. Nominal and low-thrust thrust levels. More...
  • S5.98M Isayev N2O4/UDMH rocket engine. 19.62 kN. Used on Briz and Briz-M upper stages. Isp=325s. Engine system consists of: main engine (2000 kgf, Isp=325.5s) + 4x11D458 (40 kgf, Isp=252s) + 12x17D58E (1.36 kgf, Isp=247s). 8 restarts. First flight 1990. More...
  • SE-1, 1-1, -2, and -4 Series Rocketdyne N2O4/UDMH rocket engine. SE-1, 1-1, -2, and -4 Series. Spacecraft Reaction Control. Pressure-fed. Multiple thrust levels. First flight 1959. More...
  • SE-5-2/-3 Rocketdyne N2O4/UDMH rocket engine. 0.205 kN. SE-5-2/-3. Agena Auxiliary. Pressure-fed. SE-5-2 four engines in satellite system. SE-5-3 two engines for Agena auxiliary propuslion. Isp=272s. First flight 1963. More...
  • Topaze SEP N2O4/UDMH rocket engine. 120.1 kN. Out of production. Isp=255s. Used on Diamant launch vehicle. First flight 1965. More...
  • Vexin B SEP N2O4/UDMH rocket engine. 75.4 kN. Out of production. Isp=251s. Used on Diamant launch vehicle. First flight 1965. More...
  • Vexin C SEP N2O4/UDMH rocket engine. 99.1 kN. Out of production. Isp=251s. Used on Diamant B launch vehicle. First flight 1970. More...
  • Vexin A SEP N2O4/UDMH rocket engine. 68.6 kN. Isp=277s. Used on Europa launch vehicle. First flight 1964. More...
  • Viking 2B SEP N2O4/UDMH rocket engine. 720 kN. Isp=278s. Used on Ariane 2/3. First flight 1984. More...
  • Viking 4 SEP N2O4/UDMH rocket engine. 721 kN. Isp=296s. Used on Ariane 1, GSLV, PSLV. First flight 1979. More...
  • Viking 4B SEP N2O4/UDMH rocket engine. 805 kN. Isp=296s. Used on Ariane 4. First flight 1984. More...
  • Viking 5C SEP N2O4/UDMH rocket engine. 752 kN. Isp=278s. Used on Ariane 42L, Ariane 44L, Ariane 44LP. First flight 1988. More...
  • Viking 2 SEP N2O4/UDMH rocket engine. 693 kN. In production. Isp=281s. Used on Ariane 1, GSLV space launchers. First flight 1979. More...
  • YF-20B Beijing Wan Yuan N2O4/UDMH rocket engine. 816.3 kN. In production. Isp=289s. Boosted CZ-2C, CZ-2D, CZ-2E, CZ-2E(A), CZ-3A, CZ-3B, CZ-3C, CZ-4A. First flight 1988. More...
  • YF-25/23 Beijing Wan Yuan N2O4/UDMH rocket engine. 831 kN. In production. Cluster of YF-25 and 4 x YF-23 verniers. Isp=295s. First stage engine for CZ-2D, CZ-2E, CZ-2E(A), CZ-3A, CZ-3B, CZ-3C, CZ-4A. First flight 1988. More...
  • YF-25 Beijing Wan Yuan N2O4/UDMH rocket engine. 787.4 kN. In Production. Isp=297s. More...
  • YF-23 Beijing Wan Yuan N2O4/UDMH rocket engine. 11 kN. In Production. Used as vernier motor with YF-22 and YF-25. Isp=282s. More...
  • YF-22 Beijing Wan Yuan N2O4/UDMH rocket engine. 717.8 kN. In Production. Isp=295s. More...
  • YF-22A/23A Beijing Wan Yuan N2O4/UDMH rocket engine. 762 kN. Out of production. Cluster of YF-22A and 4 x YF-23 verniers. Isp=295s. Boosted CZ-2C, CZ-3. First flight 1975. More...
  • YF-20A Beijing Wan Yuan N2O4/UDMH rocket engine. 750.2 kN. Out of production. Isp=289s. Boosted CZ-2A, CZ-2C, CZ-2E(A), CZ-3, FB-1. First flight 1972. More...
  • YF-22/23 Beijing Wan Yuan N2O4/UDMH rocket engine. 762 kN. Out of production. Cluster of YF-22 and 4 x YF-23 verniers. Isp=295s. Boosted CZ-2A, FB-1. First flight 1972. More...
  • YF-3 Beijing Wan Yuan N2O4/UDMH rocket engine. 294 kN. Out of production. Isp=287s. Used on CZ-1D launch vehicle. First flight 1995. More...
  • YF-40 Beijing Wan Yuan N2O4/UDMH rocket engine. 49 kN. Out of production. Isp=295s. Used on CZ-4A launch vehicle. First flight 1988. More...

Associated Stages
  • 8K94 N2O4/UDMH propellant rocket stage. Loaded/empty mass 9,800/900 kg. Thrust 147.00 kN. Vacuum specific impulse 330 seconds. Empty mass estimated. More...
  • 8S816 N2O4/UDMH propellant rocket stage. Loaded/empty mass 32,799/3,000 kg. Thrust 868.80 kN. Vacuum specific impulse 310 seconds. Orevo has sectioned hardware. Total mass, sea level thrust accurate; Isp, empty mass and burn time estimated. Source: Placard, Orevo. More...
  • 8S817 N2O4/UDMH propellant rocket stage. Loaded/empty mass 8,611/900 kg. Thrust 131.45 kN. Vacuum specific impulse 325 seconds. Orevo has sectioned hardware. Total mass, thrust accurate; Isp, empty mass and burn time estimated. Source: Placard, Orevo. More...
  • Angara Briz M N2O4/UDMH propellant rocket stage. Loaded/empty mass 6,565/1,600 kg. Thrust 19.60 kN. Vacuum specific impulse 325.5 seconds. Version proposed as Angara upper stage. 8 restarts. Propellant ration 2.0:1. More...
  • Ariane 1-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 160,030/13,750 kg. Thrust 2,771.94 kN. Vacuum specific impulse 281 seconds. More...
  • Ariane 1-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 37,130/3,625 kg. Thrust 720.97 kN. Vacuum specific impulse 296 seconds. More...
  • Ariane 2-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 160,030/13,750 kg. Thrust 2,880.00 kN. Vacuum specific impulse 281 seconds. More...
  • Ariane 2-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 37,130/3,625 kg. Thrust 805.00 kN. Vacuum specific impulse 296 seconds. More...
  • Ariane 4-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 245,900/17,900 kg. Thrust 3,034.10 kN. Vacuum specific impulse 278 seconds. More...
  • Ariane 4L N2O4/UDMH propellant rocket stage. Loaded/empty mass 43,772/4,493 kg. Thrust 752.00 kN. Vacuum specific impulse 278 seconds. More...
  • AVUM N2O4/UDMH propellant rocket stage. Loaded/empty mass 650/150 kg. Thrust 2.45 kN. Vacuum specific impulse 315.2 seconds. The AVUM propulsion module was composed of a UDMH/NTO bipropellant main engine with a re-ignition capability and a cold gas attitude control system, based on two clusters of three thrusters, each having a 50 N thrust. More...
  • Briz-KM N2O4/UDMH propellant rocket stage. Loaded/empty mass 6,700/1,700 kg. Thrust 19.60 kN. Briz KM differs from Briz K in having 'compact' components, special payload truss for Globalstar dispenser. The truss is 1.8 m in diameter and has a volume of 8.8 m3. More...
  • Burlak Stage 1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 18,000/1,800 kg. Thrust 357.90 kN. Vacuum specific impulse 320 seconds. Masses, thrust, specific impulse estimated based on total vehicle mass of 28.5 tonnes and first stage burn time of 140 seconds. Air launched from Tu-160 at 13,500 m, Mach 1.7 release conditions. More...
  • Burlak Stage 2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 9,400/900 kg. Thrust 98.00 kN. Vacuum specific impulse 330 seconds. Masses, thrust, specific impulse estimated based on total vehicle mass of 28.5 tonnes and first stage burn time of 140 seconds. Air launched from Tu-160 at 13,500 m, Mach 1.7 release conditions. More...
  • CZ-1C-3 N2O4/UDMH propellant rocket stage. Loaded/empty mass 6,400/1,000 kg. Thrust 107.00 kN. Vacuum specific impulse 287 seconds. More...
  • CZ-1D-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 14,850/2,650 kg. Thrust 294.00 kN. Vacuum specific impulse 287 seconds. More...
  • CZ-2E-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 91,500/5,500 kg. Thrust 831.01 kN. Vacuum specific impulse 298 seconds. More...
  • CZ-2C/SD-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 55,000/5,000 kg. Thrust 761.90 kN. Vacuum specific impulse 298 seconds. Stretched version of CZ-2C second stage. Empty mass estimated. More...
  • CZ-2C-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 153,000/10,000 kg. Thrust 3,295.00 kN. Vacuum specific impulse 291 seconds. More...
  • CZ-2C-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 39,000/4,000 kg. Thrust 761.90 kN. Vacuum specific impulse 295 seconds. More...
  • CZ-2E(A)-0 N2O4/UDMH propellant rocket stage. Loaded/empty mass 80,000/8,000 kg. Thrust 1,632.80 kN. Vacuum specific impulse 291 seconds. More...
  • CZ-2E-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 196,500/9,500 kg. Thrust 3,265.14 kN. Vacuum specific impulse 289 seconds. More...
  • CZ-3A-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 33,600/4,000 kg. Thrust 831.01 kN. Vacuum specific impulse 297 seconds. More...
  • CZ-3A-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 179,000/9,000 kg. Thrust 3,265.14 kN. Vacuum specific impulse 289 seconds. More...
  • CZ-3-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 151,000/9,000 kg. Thrust 3,000.00 kN. Vacuum specific impulse 289 seconds. More...
  • CZ-3-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 39,000/4,000 kg. Thrust 761.90 kN. Vacuum specific impulse 295 seconds. More...
  • CZ-4A-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 192,700/9,500 kg. Thrust 3,265.14 kN. Vacuum specific impulse 289 seconds. More...
  • CZ-4A-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 39,550/4,000 kg. Thrust 831.01 kN. Vacuum specific impulse 295 seconds. More...
  • CZ-4A-3 N2O4/UDMH propellant rocket stage. Loaded/empty mass 15,150/1,000 kg. Thrust 100.81 kN. Vacuum specific impulse 303 seconds. More...
  • CZ-4B-2 N2O4/UDMH rocket stage. 742.00 kN (166,808 lbf) thrust. Mass 39,600 kg (87,303 lb). More...
  • CZ-4B-3 N2O4/UDMH rocket stage. 98.10 kN (22,054 lbf) thrust. Mass 15,200 kg (33,510 lb). More...
  • Diamant-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 2,815/540 kg. Thrust 120.08 kN. Vacuum specific impulse 255 seconds. More...
  • Diamant-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 14,685/1,946 kg. Thrust 301.55 kN. Vacuum specific impulse 251 seconds. More...
  • Diamant B-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 21,500/3,500 kg. Thrust 396.52 kN. Vacuum specific impulse 251 seconds. More...
  • Europa-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 11,894/2,099 kg. Thrust 274.00 kN. Vacuum specific impulse 277 seconds. More...
  • FB-1-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 150,400/10,000 kg. Thrust 3,000.00 kN. Vacuum specific impulse 289 seconds. More...
  • FB-1-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 38,300/3,500 kg. Thrust 761.90 kN. Vacuum specific impulse 295 seconds. More...
  • Fregat N2O4/UDMH propellant rocket stage. Loaded/empty mass 6,535/1,100 kg. Thrust 19.60 kN. Vacuum specific impulse 327 seconds. Upper stage developed from propulsion bus for Lavochkin lunar and planetary probes (Luna Ye-8, Mars M1, Fobos 1F). 20 restarts. More...
  • Grom-2 N2O4/UDMH propellant rocket stage. Loaded mass 25,000 kg. More...
  • GSLV-0 N2O4/UDMH propellant rocket stage. Loaded/empty mass 45,600/5,600 kg. Thrust 735.00 kN. Vacuum specific impulse 281 seconds. More...
  • GSLV-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 42,900/5,400 kg. Thrust 725.02 kN. Vacuum specific impulse 295 seconds. More...
  • Ikar N2O4/UDMH propellant rocket stage. Loaded/empty mass 3,164/820 kg. Thrust 2.94 kN. Vacuum specific impulse 326 seconds. Derived from propulsion module of Yantar spysat, over 30 flights to 1998. 50 restarts. More...
  • LB-40 N2O4/UDMH propellant rocket stage. Loaded/empty mass 41,000/3,200 kg. Thrust 816.29 kN. Vacuum specific impulse 291 seconds. More...
  • LCLV-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 3,253,246/396,013 kg. Thrust 56,368.00 kN. Vacuum specific impulse 267 seconds. More...
  • LCLV-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 798,389/95,092 kg. Thrust 9,793.30 kN. Vacuum specific impulse 300 seconds. More...
  • LCLV-3 N2O4/UDMH propellant rocket stage. Loaded/empty mass 161,304/19,518 kg. Thrust 2,028.04 kN. Vacuum specific impulse 306 seconds. More...
  • Martlet 4L-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 243/46 kg. Thrust 20.50 kN. Vacuum specific impulse 300 seconds. More...
  • Martlet 4L-3 N2O4/UDMH propellant rocket stage. Loaded/empty mass 58/9 kg. Thrust 5.39 kN. Vacuum specific impulse 300 seconds. More...
  • MR-UR-100 St 1 N2O4/UDMH rocket stage. 1236.00 kN (277,864 lbf) thrust. Mass 59,000 kg (130,073 lb). More...
  • MR-UR-100-2 N2O4/UDMH rocket stage. 142.00 kN (31,923 lbf) thrust. Mass 10,000 kg (22,046 lb). More...
  • Proton K-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 450,510/31,100 kg. Thrust 10,470.16 kN. Vacuum specific impulse 316 seconds. More...
  • Proton K-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 167,828/11,715 kg. Thrust 2,399.22 kN. Vacuum specific impulse 327 seconds. More...
  • Proton K-3 N2O4/UDMH propellant rocket stage. Loaded/empty mass 50,747/4,185 kg. Thrust 630.17 kN. Vacuum specific impulse 325 seconds. More...
  • Proton KM-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 450,400/31,000 kg. Thrust 10,532.00 kN. Vacuum specific impulse 317 seconds. More...
  • Proton KM-3 N2O4/UDMH propellant rocket stage. Loaded/empty mass 50,300/3,700 kg. Thrust 613.80 kN. Vacuum specific impulse 326.5 seconds. More...
  • Proton KM-4 Briz M N2O4/UDMH propellant rocket stage. Loaded/empty mass 22,170/2,370 kg. Thrust 19.60 kN. Vacuum specific impulse 326 seconds. New upper stage for Proton, replacing Energia Corporation's Block DM, making Proton an all-Khrunichev launch vehicle. The Khrunichev-built Briz-M upper stage is a derivative of the flight-proven Briz -K stage (as used on the Rokot booster). More...
  • Proton-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 134,900/13,180 kg. Thrust 2,399.19 kN. Vacuum specific impulse 325 seconds. Proton UR-500 second stage. Flew only on two-stage version of Proton. Empty mass is correct; all other values estimated based on UR-500 Stage 2 original design and UR-500K stage 2 figures. More...
  • PSLV-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 45,800/5,300 kg. Thrust 725.02 kN. Vacuum specific impulse 293 seconds. More...
  • R-21-1 N2O4/UDMH propellant rocket stage. Loaded mass 16,600 kg. More...
  • R-29-1 N2O4/UDMH propellant rocket stage. Loaded mass 20,000 kg. Thrust 682.00 kN. More...
  • R-36M2-3 N2O4/UDMH propellant rocket stage. Loaded/empty mass 4,266/2,356 kg. Thrust 18.60 kN. Vacuum specific impulse 317 seconds. Main engine could be throttled to 800 kgf. More...
  • R-36-0-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 48,000/5,000 kg. Thrust 955.99 kN. Vacuum specific impulse 317 seconds. More...
  • R-36--1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 122,300/6,400 kg. Thrust 2,651.70 kN. Vacuum specific impulse 301 seconds. Verniers 4 x RD-68M, 285 kN, maximum 42 degree gimbal angle. More...
  • R-36-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 49,300/3,700 kg. Thrust 940.40 kN. Vacuum specific impulse 317 seconds. Verniers 4 x RD-69M, 54.3 kN, maximum 50 degree gimbal angle. More...
  • R-36M St 1 N2O4/UDMH rocket stage. 4522.00 kN (1,016,586 lbf) thrust. Mass 210,000 kg (462,971 lb). More...
  • R-36M-2 N2O4/UDMH rocket stage. 760.00 kN (170,855 lbf) thrust. Mass 49,000 kg (108,027 lb). More...
  • R-36M2-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 161,520/13,620 kg. Thrust 4,523.00 kN. Vacuum specific impulse 318 seconds. Surplus ICBMs; failures based on ICBM tests through 1994. More...
  • R-36M2-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 41,114/4,374 kg. Thrust 760.00 kN. Vacuum specific impulse 340 seconds. Surplus ICBMs; failures based on ICBM tests through 1994. More...
  • R-36-0-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 125,000/8,500 kg. Thrust 2,640.00 kN. Vacuum specific impulse 301 seconds. More...
  • R-56 Block O N2O4/UDMH propellant rocket stage. Loaded/empty mass 32,000/2,000 kg. Thrust 544.20 kN. Vacuum specific impulse 327 seconds. Empty mass estimated (rounded figures given in source material indicates impossible 31 tonnes gross with 30 tonnes propellant). More...
  • R-56 Block B N2O4/UDMH propellant rocket stage. Loaded/empty mass 213,000/13,000 kg. Thrust 1,980.00 kN. Vacuum specific impulse 325 seconds. More...
  • R-56 Block A N2O4/UDMH propellant rocket stage. Loaded/empty mass 1,162,000/162,000 kg. Thrust 1,608.00 kN. Vacuum specific impulse 316 seconds. More...
  • Rif-3 N2O4/UDMH propellant rocket stage. Loaded mass 10,000 kg. More...
  • Rokot-3 Briz N2O4/UDMH propellant rocket stage. Loaded/empty mass 6,565/1,600 kg. Thrust 19.60 kN. Vacuum specific impulse 326 seconds. High performance storable liquid engine. The basic stage can be adapted with 'wrap-around' propellant tanks for Proton booster applications. More...
  • RT-23-3 N2O4/UDMH propellant rocket stage. Loaded mass 15,000 kg. Thrust 206.00 kN. More...
  • Saturn LCB-Storable-140 N2O4/UDMH propellant rocket stage. Loaded/empty mass 1,995,800/199,600 kg. Thrust 28,553.00 kN. Vacuum specific impulse 267 seconds. Boeing Low-Cost Saturn Derivative Study, 1967 (trade study of 260 inch first stages for S-IVB, all delivering 86,000 lb pyld to LEO): Low Cost Booster, Single Pressure-fed N2O4/UDMH Propellant engine, HY-140 Hull More...
  • Saturn LCB-Storable-250 N2O4/UDMH propellant rocket stage. Loaded/empty mass 1,451,500/108,900 kg. Thrust 21,232.30 kN. Vacuum specific impulse 267 seconds. Boeing Low-Cost Saturn Derivative Study, 1967 (trade study of 260 inch first stages for S-IVB, all delivering 86,000 lb pyld to LEO): Low Cost Booster, Single Pressure-fed N2O4/UDMH Propellant engine, Ni-250 Hull More...
  • Saturn PFL N2O4/UDMH propellant rocket stage. Loaded/empty mass 2,057,400/205,400 kg. Thrust 28,553.00 kN. Vacuum specific impulse 267 seconds. NASA, Saturn Alternative Booster Studies, 1969 (trade study of 120, 156, 260 inch solid, and Storable liquid boosters for S-IVB. Reached opposite conclusion from Boeing study, that Pressure Fed Liquid Booster would be 6.5% more expensive than solid). Pre More...
  • Shtil'-2 N2O4/UDMH propellant rocket stage. Loaded mass 10,000 kg. More...
  • Tsyklon 2-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 122,300/6,400 kg. Thrust 2,640.00 kN. Vacuum specific impulse 301 seconds. SL-11; 11K68;R-36M More...
  • Tsyklon 2-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 49,300/3,700 kg. Thrust 940.40 kN. Vacuum specific impulse 317 seconds. More...
  • Tsyklon 2-3 N2O4/UDMH propellant rocket stage. Loaded/empty mass 3,200/400 kg. Thrust 77.96 kN. Vacuum specific impulse 317 seconds. Integral portion of payload. More...
  • Tsyklon 3-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 127,000/8,300 kg. Thrust 3,032.00 kN. Vacuum specific impulse 301 seconds. SL-14;11K69 More...
  • Tsyklon 3-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 53,300/4,800 kg. Thrust 941.00 kN. Vacuum specific impulse 318 seconds. More...
  • Tsyklon 3-3 N2O4/UDMH propellant rocket stage. Loaded/empty mass 4,600/1,407 kg. Thrust 78.71 kN. Vacuum specific impulse 317 seconds. More...
  • UR-100N Stage 2N N2O4/UDMH propellant rocket stage. Loaded/empty mass 12,195/1,485 kg. Thrust 214.27 kN. Vacuum specific impulse 322 seconds. Engine has one main engine and four verniers. Verniers continue to burn for 19 seconds after mainstage shutoff. More...
  • UR-100N MIRV Bus N2O4/UDMH propellant rocket stage. Loaded/empty mass 1,100/725 kg. Thrust 4.90 kN. Vacuum specific impulse 200 seconds. More...
  • UR-100N Stage 1N N2O4/UDMH propellant rocket stage. Loaded/empty mass 77,150/5,695 kg. Thrust 1,778.66 kN. Vacuum specific impulse 310 seconds. More...
  • UR-200-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 25,810/2,400 kg. Thrust 612.90 kN. Vacuum specific impulse 322 seconds. Tsniimash has 1:10 structural simulation model. Developed 1960-1965. Orevo has sectioned hardware. All data accurate except empty mass prorated between first and second stages. More...
  • UR-200-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 107,500/6,600 kg. Thrust 2,235.00 kN. Vacuum specific impulse 311 seconds. Tsniimash has 1:10 structural simulation model. Developed 1960-1965. Orevo has sectioned hardware. All data accurate except empty mass prorated between first and second stages. More...
  • UR-500 Monoblok Stage 1M N2O4/UDMH propellant rocket stage. Loaded/empty mass 367,360/25,560 kg. Thrust 8,989.70 kN. Vacuum specific impulse 310 seconds. Original conventional 'Monoblock' design for Proton first stage. More...
  • UR-500 Polyblock Stage 1P N2O4/UDMH propellant rocket stage. Loaded/empty mass 378,900/26,900 kg. Thrust 8,989.70 kN. Vacuum specific impulse 310 seconds. Original 'Polyblock' design for Proton first stage. This was selected configuration; although somewhat greater in dry mass, it had the advantages of shorter length. More...
  • UR-500 Stage 2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 137,700/16,000 kg. Thrust 3,183.20 kN. Vacuum specific impulse 320 seconds. Original Proton second stage design. More...
  • UR-500 Stage 3 N2O4/UDMH propellant rocket stage. Loaded/empty mass 23,940/2,180 kg. Thrust 613.11 kN. Vacuum specific impulse 320 seconds. Original Proton third stage design. More...
  • UR-700-4 N2O4/UDMH propellant rocket stage. Loaded/empty mass 33,500/1,900 kg. Thrust 131.40 kN. Vacuum specific impulse 326 seconds. Estimated empty mass. Three used to propell LK-700 spacecraft towards moon. More...
  • UR-700-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 3,210,000/222,100 kg. Thrust 40,364.00 kN. Vacuum specific impulse 322 seconds. Includes propellant tanks which fed stage two engines from liftoff to first stage cutoff. More...
  • UR-700-2 N2O4/UDMH propellant rocket stage. Loaded/empty mass 1,072,000/75,600 kg. Thrust 20,182.00 kN. Vacuum specific impulse 322 seconds. More...
  • UR-700-3 N2O4/UDMH propellant rocket stage. Loaded/empty mass 399,400/26,000 kg. Thrust 5,139.60 kN. Vacuum specific impulse 328 seconds. More...
  • Volna-1 N2O4/UDMH propellant rocket stage. Loaded mass 20,000 kg. Thrust 682.00 kN. More...
  • Volna-2 N2O4/UDMH propellant rocket stage. Loaded mass 10,000 kg. More...
  • Vysota-1 N2O4/UDMH propellant rocket stage. Loaded mass 20,000 kg. Thrust 682.00 kN. More...
  • Vysota-2 N2O4/UDMH propellant rocket stage. Loaded mass 10,000 kg. More...

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