RD-843

RD-843
Country of origin Ukraine
First flight 2012-02-13
Designer Yuzhnoye Design Bureau
Manufacturer Yuzhmash
Application Upper Stage
Associated L/V Vega
Predecessor RD-869[1]
Status In Production
Liquid-fuel engine
Propellant N2O4[2] / UDMH[2]
Mixture ratio 2.0[1]
Cycle Pressure Fed[1]
Configuration
Chamber 1[1]
Performance
Thrust (vac.) 2.452 kilonewtons (551 lbf)[2]
Isp (vac.) 315.5 seconds[1]
Burn time up to 667s[2]
Dimensions
Dry weight 15.93 kilograms (35.1 lb)[2]
Used in
AVUM

The RD-843 is a Ukrainian single nozzle liquid propellant rocket engine burning pressure-fed UDMH and nitrogen tetroxide. It is rated for up to 5 restarts, and can gimbal up to 10 degrees in each direction.[1]

It was developed by Yuzhnoye Design Bureau for Avio and is manufactured by Yuzhmash. It uses the RD-869 thrust chamber, the old Soviet ICBM SS-18 Satan final stage engine from which it is evolved, and which was also designed by Yuzhnoye. The RD-843 ground test campaign included 74 tests, 140 ignitions, reaching a total of 8201 s, which is approximately 12 service lives on 4 engines. As of May 2015 it has been successfully used on four orbital launches.[1]

It is currently used as the main engine of Vega's AVUM upper stage. Germany’s aerospace technology agency-DLR is understood to be keen to work with the Italians to develop a replacement for the RD-843.[3][4]

See also

References

  1. 1 2 3 4 5 6 7 "RD-843". Yuzhnoye. Retrieved 2015-05-29.
  2. 1 2 3 4 5 "Liquid rocket engine RD-843". Yuzhmash. Retrieved 2015-05-29.
  3. Clark, S. (2012-02-14). "Vega launcher program courts German participation". Spaceflight Now. p. 1. Retrieved 2015-05-29.
  4. Thisdell, Dan (2014-04-24). "ESA keeps eye on Ukraine crisis as Vega launch nears.". Flightglobal. Retrieved 2015-05-29.

External links

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