The S5.142 (AKA DST-25) is a
liquid
A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure. As such, it is one of the four fundamental states of matter (the others being solid, gas, a ...
pressure-fed rocket engine burning
N2O4/
UDMH with an
O/F of 1.85.
It is used for crew-rated
spacecraft propulsion
Spacecraft propulsion is any method used to accelerate spacecraft and artificial satellites. In-space propulsion exclusively deals with propulsion systems used in the vacuum of space and should not be confused with space launch or atmospheric e ...
applications.
It was used in
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 ...
propulsion module from the
Soyuz-TM
The Soyuz-TM were fourth generation (1986–2002) Soyuz spacecraft used for ferry flights to the Mir and International Space Station, ISS space stations. The Soyuz spacecraft consisted of three parts, the Orbital Module, the Descent Module and th ...
to the
Soyuz-TMA-M, as the low thrust thruster (DPO-M).
As of the
Soyuz MS, KTDU-80 does not use DPO-M anymore.
The S5.142 generates of thrust with a chamber pressure of and a nozzle expansion of 45 that enables it to achieve a
specific impulse of .
It is rated for 300,000 starts with a total firing time of 25,000 seconds and can do single burns from 0.03 seconds to 4,000 seconds. Each unit weights .
Versions
This engine has been used in
crewed Russian space program since the
Soyuz TM-23
Soyuz TM-23 was a Soyuz spaceflight which launched on February 21, 1996, to ''Mir''.The mission report is available here: http://www.spacefacts.de/mission/english/soyuz-TM-23.htm The spacecraft launched from Baikonur Cosmodrome, and after two da ...
.
There are two versions:
* S5.142 (AKA DST-25): Version used as DPO-M (attitude control thrusters) on 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 ...
unit of the
Soyuz-TM
The Soyuz-TM were fourth generation (1986–2002) Soyuz spacecraft used for ferry flights to the Mir and International Space Station, ISS space stations. The Soyuz spacecraft consisted of three parts, the Orbital Module, the Descent Module and th ...
up to the
Soyuz-TMA-M.
* S5.142A: A version of the S5.142 adapted for the
KVTK upper stage for the
Angara
The Angara ( Buryat and mn, Ангар, ''Angar'', "Cleft"; russian: Ангара́, ''Angará'') is a major river in Siberia, which traces a course through Russia's Irkutsk Oblast and Krasnoyarsk Krai. It drains out of Lake Baikal and is ...
rocket.
See also
*
KB KhIMMASH
*
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 ...
*
Soyuz-TMA
References
External links
KB KhIMMASH Official Page (in Russian)
Rocket engines of Russia
Rocket engines using hypergolic propellant
Rocket engines using the pressure-fed cycle
KB KhimMash rocket engines
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