# A.M. Isayev Chemical Engineering Design Bureau

The A.M. Isayev Chemical Engineering Design Bureau (Russian: Конструкторское бюро химического машиностроения имени A.M. Исаева), also known as KB KhimMash or just KBKhM, is a Russian rocket engine design and manufacturing company. It is located in the city of Korolyov. It started as the OKB-2 division of the NII-88 research institute, where A.Isaev directed the development of liquid rocket engines for ballistic missile submarines.

## Products
### Current engines

Engines in current production:
* Monopropellant Thrusters
** DOT-5
** DOT-25
** MLC-10
** MLC-50
* Bipropellant Thrusters
** S5.142 (DST-25)
** DST-50
** DST-100
** DST-100A
** DST-200
** DST-200A
** DMT-6
** DMT-500
** DMT-600
** DMT-1000
** DMT-2200
* Main propulsion
** S5.80
** S5.92
** S5.98
** KVD-1
* Propulsion Modules
** KTDU-80
* Experimental Engines
** S5.86.1000-0

### Former engines

Engines that are no longer produced.
* Monopropellant Thrusters
** S5.70: Used on Phobos 1 spacecraft.
** S5.70: Used on Phobos 1 spacecraft.
* Bipropellant Thrusters
** S5.144: Used on the control module 17D61 of the Ikar.
** S5.205
* Orbit Correction Engines
** S5.4: Liquid engine burning TG-02 and AK20F in the gas generator cycle. Used to deorbit Vostok, Voskhod and Zenit.
** S5.35: Backup engine of the KTDU-35.
** S5.53: Orbital correction engine for the lunar version of the Soyuz.
** S5.60: Main engine of the KTDU-35.
** S5.66: Maneuvering engine version for the Salyut 1 and Salyut 4 stations. Also was composed of primary and secondary engines.
** S5.79: Pressure-fed rocket engine burning N$_2$O$_4$/UDMH. Used as the main orbital engine of Salyut-6, Salyut-7, Mir Core Module and Zvezda.
* Propulsion Modules
** KDU-414: Pressure-fed liquid rocket engine burning UDMH and RFNA. Used on early soviet deep space probes.
** KTDU-35: Liquid rocket engine burning UDMH and AK27I in the gas generator cycle. Used on first generation Soyuz, and Progress.
** KTDU-425: Pump-fed liquid rocket engine. Used on the 4MV bus employed by unmanned Mars and Venus probes.
** KTDU-426: Spacecraft version of the S5.79. Used on the Soyuz-T.
* Military Missiles
** RD-1
** RD-1M
** Y-1250
** U-400-10
** PT 45-2
** SU-1500
** Y-2000
** S09.19A?
** S09.29A S09.29.0-0
** S09.29D
** S09.29B
** S09.29.0-OV?
** S09.29.0-OV?
** S2.145
** S2.145
** S2.168A
** S2.168B
** S2.219
** S.911.0100 S2.219?
** S2.244
** S2.258
** S2.260
** S2.268
** S2.514
** S2.711
** S2.711V S2.711V1
** S2.720
** S2.720.A2
** S2.720M
** S2.721 S2.721V
** S2.722
** S2.722V
** S2.726
** S2.727
** S2.751V?
** S2.1100: A TG-02/AK20K burning engine. Development years: 1955–1958. For use in the booster module of the Burya intercontinental cruise missile project.
** S2.1150: An improved version of the S2.1100. Development years: 1958–1960. For use in the booster module of the Burya project.
** S2.1200
** S5.1
** S.5.6.0000.0
** S5.15
** S5.33
** S5.33A S5.33M
** S5.41
** S5.44 5D25
** S5.57
** S5.44 5D25
** 5D25N
** S5.83
* Rocket engines for ICBM and SLBM
** S2.253 (8D511): A kerosene/AK20 burning engine in the pressure fed cycle. Development years: 1951-1955 . For use in first versions of Scud-A. Ignition by hypergolic start fuel TG-02.
** S2.253A: A kerosene/AK-20 burning engine in the pressure fed cycle. Development years: 1953-1959 . For use in the RSM-11FM. Ignition by hypergolic start fuel TG-02.
** S2.713: A TG-02/AK27I burning engine in the gas generator cycle. Development years: 1956-1961 . For use in the R-13. It included a fixed nozzle and four verniers.
** S5.2 (9D21): A TM-185/AK-27I burning engine in the gas generator cycle. Development years: 1959-1962 . For use in the R-17.
** S5.3: A TG-02/AK-27I burning engine in the gas generator cycle. Development years: 1958-1963 . For use in the R-21.
** S5.3M: A TG-02/AK-27I burning engine in the gas generator cycle. Development years: 1960. Project for the ICBM R-9B.
** 4D10: A UDMH/N$_2$O$_4$ burning engine in the staged combustion cycle. Development years: 1962-1968 . For use as main engine of the first stage of R-27. First engine submerged in the propellant tank.
** 4D10: A UDMH/N$_2$O$_4$ burning engine in the gas generator cycle. Development years: 1963-1968 . For use as the steering engine of the first stage of the R-27. Submerged in the propellant tank.
** 4D76: A UDMH/N$_2$O$_4$ burning engine in the gas generator cycle. Development years: 1964-1971 . For use as main engine of the second stage of R-29. Submerged in the propellant tank.
** 4D76M: A UDMH/N$_2$O$_4$ burning engine in the gas generator cycle. Development years: 1969-1970 . Improved version of the 4D-76.
** 4D28: A UDMH/N$_2$O$_4$ burning engine in the gas generator cycle. Development years: 1968-1970 . For use on the second stage of the rocket RSM-27K.
** 3D20: A UDMH/N$_2$O$_4$ burning engine in the staged combustion cycle. Development years: 1971-1973 . For use as main engine RSM-27U.
** 3D20: A UDMH/N$_2$O$_4$ burning engine in the gas generator cycle. Development years: 1971-1973 . For use as steering engine R-27U.
** 3D41: A UDMH/N$_2$O$_4$ burning engine in the gas generator cycle. Development years: 1973-1975 . For use on the second stage of R-29R. Submerged in the propellant tank.
** 3D42: A UDMH/N$_2$O$_4$ burning engine in the gas generator cycle. Development years: 1973-1975 . For use on warhead of the R-29R . Four fixed main combustion chambers and four verniers.
** 3D67?: A UDMH/N$_2$O$_4$ burning engine in the gas generator cycle. Development years: 1976-1980 . For use on warhead of the R-39. Dual-mode rocket engine with multiple regimen.
** 3D36: A UDMH/N$_2$O$_4$ burning engine in the gas generator cycle. Development years: 1980-1986 . For use on warhead of the R-29RM.
** 3D38: A UDMH/N$_2$O$_4$ burning engine in the staged combustion cycle. Development years: 1980-1986 . For use on the second stage R-29RM. Submerged in the propellant tank.
** 3D39: A UDMH/N$_2$O$_4$ burning engine in the staged combustion cycle. Development years: 1980-1986 . For use on the third stage R-29RM. Submerged in the propellant tank.