The RD-843 is a Ukrainian single nozzle liquid propellant rocket engine. It burns a hypergolic mixture of unsymmetrical dimethylhydrazine (UDMH) fuel with dinitrogen tetroxide (N2O4) oxidizer. It is pressure-fed. It is rated for up to 5 restarts, and can gimbal up to 10 degrees in each direction.[2]

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 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 8,201 seconds, which is approximately 12 service lives on 4 engines. As of June 2020 it has been successfully used on 14 orbital launches.[5]

The Vega and Vega C uses it as the main engine on its AVUM (Attitude & Vernier Upper Module) fourth stage which it calls the MEA (short for Main Engine AVUM).[6]

See also

  • AVUM - The upper stage of the Vega rocket that uses the RD-843 as its main engine.
  • Vega - The ESA small rocket that uses AVUM.
  • Yuzhnoe Design Bureau - The RD-843 designer bureau.
  • Yuzhmash - A multi-product machine-building company that's closely related to Yuzhnoe and manufactures the RD-843.

Notes

  1. ^ Engine can burn up to 612.5 seconds per burn. Maximum cumulative burn time of 924.8 seconds.

References

  1. ^ "Liquid rocket engine RD-843". Yuzhmash. Retrieved 2015-05-29.
  2. ^ a b "RD-843". Yuzhnoye. Archived from the original on 2020-12-02. Retrieved 2015-05-29.
  3. ^ Degtyarev, Alexander; Kushnaryov, Alexander; Shulga, Vladimir; Ventskovsky, Oleg (2016-10-01). "Yuzhnoye's new liquid rocket engines as enablers for space exploration". Acta Astronautica. 127: 693–698. Bibcode:2016AcAau.127..693D. doi:10.1016/j.actaastro.2016.04.006.
  4. ^ "RD-843". Defense Industry Of Ukraine Products And Services. Retrieved 2016-07-11.
  5. ^ "Vega". 4 June 2020.
  6. ^ "Vega C Users Manual" (PDF). Arianespace. May 2018. p. 1-6. Retrieved 2024-07-08.
Allikas: https://en.wikipedia.org/wiki/RD-843
No tags for this post.