S5.142

Last updated
S5.142
Country of origin Russia
Date1990-1996
First flight1996-02-21 (Soyuz TM-23)
Designer KB KhIMMASH
Application attitude control thruster
Predecessor11D427M
StatusRetired
Liquid-fuel engine
Propellant N2O4 / UDMH
Mixture ratio1.85
Cycle pressure fed
Configuration
Chamber1
Nozzle ratio45
Performance
Thrust, vacuum25 N (5.6 lbf)
Chamber pressure 0.88 MPa (128 psi)
Specific impulse, vacuum285 s (2.79 km/s)
Burn time25,000 seconds
Restarts300,000
Dimensions
Length180 mm (7.1 in)
Diameter136 mm (5.4 in)
Dry weight0.9 kg (2.0 lb)
Used in
KTDU-80
References
References [1] [2] [3] [4] [5] [6]

The S5.142 (AKA DST-25) is a liquid pressure-fed rocket engine burning N2O4/UDMH with an O/F of 1.85. [1] It is used for crew-rated spacecraft propulsion applications. [5] It was used in KTDU-80 propulsion module from the Soyuz-TM to the Soyuz-TMA-M, as the low thrust thruster (DPO-M). [3] As of the Soyuz MS, KTDU-80 does not use DPO-M anymore. [6]

Contents

The S5.142 generates 25 N (5.6 lbf) of thrust with a chamber pressure of 0.88 MPa (128 psi) and a nozzle expansion of 45 that enables it to achieve a specific impulse of 285 s (2.79 km/s). [1] 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 0.9 kg (2.0 lb). [1] [5]

Versions

This engine has been used in crewed Russian space program since the Soyuz TM-23. [1] There are two versions: [4]

See also

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References

  1. 1 2 3 4 5 6 "ЖРДМТ от 0,5 кгс до 250 кгс" [Small thrust jet engine from 0.5 kgf to 250 kgf] (in Russian). KB KhIMMASH. Archived from the original on 23 April 2013.
  2. "Двигатели 1944-2000: Аавиационные, Ракетные, Морские, Промышленные" [Aviadvigatel 19442-2000: Aviation, rocketry, naval and industry](PDF) (in Russian). pp. 75–81. Retrieved 2015-07-25.
  3. 1 2 Pillet, Nicolas. "Le système de propulsion du vaisseau Soyouz" [The propulsion system of the Soyuz spacecraft] (in French). Kosmonavtika.com. Retrieved 2015-07-14.
  4. 1 2 3 "Основные двигатели разработки КБХМ" [The main engines produced by KbKhA] (in Russian). Retrieved 2015-07-25.
  5. 1 2 3 RKK Energia (June 1999). "3.17. Комбинированная Двигательная Установка (КДУ) (Combined Propulsion System)". Soyuz Crew Operations Manual (SoyCOM) (ROP-19) Final . pp. 122–129 via NASASpaceFlight.com.
  6. 1 2 Zak, Anatoly (2016-07-07). "Propulsion system for the Soyuz MS spacecraft". Russian Space Web. Retrieved 2016-07-06.