RD-843
| Country of origin | Ukraine |
|---|---|
| First flight | 2012-02-13 |
| Designer | Yuzhnoye Design Bureau |
| Manufacturer | Yuzhmash |
| Application | Upper Stage |
| Associated LV | Vega |
| Predecessor | RD-869 |
| Status | In Production |
| Liquid-fuel engine | |
| Propellant | N2O4 / UDMH |
| Mixture ratio | 2.0 |
| Cycle | Pressure Fed |
| Configuration | |
| Chamber | 1 |
| Performance | |
| Thrust, vacuum | 2.452 kilonewtons (551 lbf) |
| Chamber pressure | 2.04 MPa (296 psi) |
| Specific impulse, vacuum | 315.5 seconds |
| Burn time | up to 667s |
| Dimensions | |
| Dry weight | 15.93 kilograms (35.1 lb) |
| Used in | |
| AVUM | |
| References | |
| References | [1][2][3][4] |
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.[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 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.[2]
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.[5][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.
References
- ^ "Liquid rocket engine RD-843". Yuzhmash. Retrieved 2015-05-29.
- ^ a b c "RD-843". Yuzhnoye. Retrieved 2015-05-29.
- ^ 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.
- ^ "RD-843". Defense Industry Of Ukraine Products And Services. Retrieved 2016-07-11.
- ^ Clark, S. (2012-02-14). "Vega launcher program courts German participation". Spaceflight Now. p. 1. Retrieved 2015-05-29.
- ^ 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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