The 11D428A-16 (manufacturer's name RDMT-135M) is a liquid pressure-fed

rocket engine A rocket engine uses stored rocket propellants as the reaction mass for forming a high-speed propulsive jet of fluid, usually high-temperature gas. Rocket engines are reaction engines, producing thrust by ejecting mass rearward, in accorda ...

burning N₂O₄/

UDMH Unsymmetrical dimethylhydrazine (UDMH; 1,1-dimethylhydrazine, НДМГ or codenamed Geptil) is a chemical compound with the formula H2NN(CH3)2 that is used as a rocket propellant. It is a colorless liquid, with a sharp, fishy, ammonia-like smell ...

with an O/F of 1.85. It is used for crew-rated spacecraft propulsion applications. It is currently used in the

KTDU-80 The KTDU-80 (Russian: ) is the latest of a family of integrated propulsion system that KB KhIMMASH has implemented for the Soyuz since the Soyuz-T. It integrates main propulsion, RCS and attitude control in a single system pressure fed from a co ...

spacecraft propulsion module. The previous version, the 11D428A (manufacturer's name RDMT-135) is still used as the

reaction control system A reaction control system (RCS) is a spacecraft system that uses thrusters to provide attitude control and translation. Alternatively, reaction wheels are used for attitude control. Use of diverted engine thrust to provide stable attitude cont ...

thrusters of the Zvezda

ISS The International Space Station (ISS) is the largest modular space station currently in low Earth orbit. It is a multinational collaborative project involving five participating space agencies: NASA (United States), Roscosmos (Russia), JAXA (J ...

module. The 11D428A-16 generates of thrust with a chamber pressure of and achieves a

specific impulse Specific impulse (usually abbreviated ) is a measure of how efficiently a reaction mass engine (a rocket using propellant or a jet engine using fuel) creates thrust. For engines whose reaction mass is only the fuel they carry, specific impulse is ...

of . It is rated for 500,000 starts with a certified ignition time of 0.03 seconds to 2000 seconds. Each unit weights .

Versions

This engine has been used with certain variations in manned

Russian space program The State Space Corporation "Roscosmos" (russian: Государственная корпорация по космической деятельности «Роскосмос»), commonly known simply as Roscosmos (russian: Роскосмос) ...

since the

Salyut 6 Salyut 6 (russian: Салют-6; lit. Salute 6), DOS-5, was a Soviet orbital space station, the eighth station of the Salyut programme. It was launched on 29 September 1977 by a Proton rocket. Salyut 6 was the first space station to recei ...

Soviet The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen nation ...

times. The three main versions are: * 11D428: Delivered in 1970 for use in

Salyut 1 Salyut 1 (DOS-1) (russian: Салют-1) was the world's first space station launched into low Earth orbit by the Soviet Union on April 19, 1971. The Salyut program followed this with five more successful launches of seven more stations. The f ...

. * 11D428M: Version developed for the Yantar-2K platform. It reached space on the first launch, Kosmos 697 on August 6, 1974. * 11D428A (AKA RDMT-135): Version developed for the Soyuz 7K-S, it flew on Kosmos 670, Kosmos 772 and Kosmos 869. Later used on the KTDU-426. * 11D428A-10: Thruster used on the Zvezda ISS Module. Originally developed for the

Mir Core Module ''Mir'' (russian: Мир lit. ''Peace'' or ''World''), DOS-7, was the first module of the Soviet/Russian ''Mir'' space station complex, in low Earth orbit from 1986 to 2001. Generally referred to as either the core module or base block, t ...

. * 11D428A-14: Thruster used on the Zvezda ISS module. * 11D428A-16 (AKA RDMT-135M): Improved specific impulse version. Used on the

since Soyuz TM-28. * 11D428AF-16:Thruster version developed for the

Fobos-Grunt Fobos-Grunt or Phobos-Grunt (russian: link=no, Фобос-Грунт, where ''грунт'' refers to the ''ground'' in the narrow geological meaning of any type of soil or rock exposed on the surface) was an attempted Russian sample return mis ...

planetary sample mission.

References

External links

KB KhIMMASH Official Page (in Russian)
{{Orbital spacecraft rocket engines Rocket engines of Russia Rocket engines of the Soviet Union Rocket engines using hypergolic propellant Rocket engines using the pressure-fed cycle NIIMash rocket engines

Versions

See also

References

External links