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| Country of origin | USSR |
|---|---|
| First flight | 1981-12-27 |
| Designer | OKB-154 |
| Associated LV | R-36M and Dnepr |
| Predecessor | RD-0229 |
| Status | In Service |
| Liquid-fuel engine | |
| Propellant | N2O4 / UDMH |
| Mixture ratio | 2.6 |
| Cycle | Oxidizer Rich Staged combustion |
| Configuration | |
| Chamber | 1 |
| Performance | |
| Thrust | 755 kilonewtons (170,000 lbf) |
| Used in | |
| RD-0255 Propulsion Module | |
| References | |
| References | |
| Country of origin | USSR |
|---|---|
| First flight | 1981-12-27 |
| Designer | OKB-154 |
| Associated LV | R-36M and Dnepr |
| Predecessor | RD-0230 |
| Status | In Service |
| Liquid-fuel engine | |
| Propellant | N2O4 / UDMH |
| Cycle | Gas Generator |
| Configuration | |
| Chamber | 4 |
| Used in | |
| RD-0255 Propulsion Module | |
| References | |
| References | |
The RD-0255 (Russian: Ракетный Двигатель-0255, romanized: Raketnyy Dvigatel-0255, lit. 'Rocket Engine 0255') is a propulsion module composed of an RD-0256 main engine and a RD-0257 Vernier thruster. Both are liquid-fuel rocket engines, burning a hypergolic mixture of unsymmetrical dimethylhydrazine (UDMH) fuel with dinitrogen tetroxide (N2O4) oxidizer. The RD-0256 main engine operates in the oxidizer rich staged combustion cycle, while the vernier RD-0257 uses the simpler gas generator cycle. It was used on the R-36MUTTKh (GRAU:15A18) and R-36M2 (GRAU:15A18M). Subsequently, it has been in the Dnepr second stage and as of 2016 it is still in active service.
The RD-0256 is an improved version of the RD-0228 (GRAU: 15D84), itself composed of an RD-0229 (GRAU: 15D84) main engine and a RD-0230 (GRAU: 15D79) vernier engine. The RD-0228 was developed between 1967 and 1974 for the first generation of R-36M (GRAU: 15D83) ICBM second stage, but was replaced on subsequent iterations by the RD-0256. The RD-0228 debut was on January 21, 1973. With the START I and START II the RD-0228 was retired and its successor, the RD-0256, only continued as the Dnepr.
See also
- R-36M – A Soviet ICBM that used the RD-0228 and RD-0255.
- Dnepr – Small launch vehicle designed by Yuzhmash that uses the RD-0255.
- KBKhA – The RD-0228 and RD-0255 design bureau.
- Vernier Engine
- Rocket engine
References
- ^ "RD-0255". Encyclopedia Astronautica. Archived from the original on May 20, 2002. Retrieved 2016-07-06.
- ^ "RD-0228". Encyclopedia Astronautica. Archived from the original on June 25, 2002. Retrieved 2016-07-06.
- ^ "РД0228, РД0229, РД0230, РД0255, РД0256, РД0257. Межконтинентальные баллистические ракеты РС-20А, РС-20Б, РС-20В" [RD0228, RD0229, RD0230, RD0255, RD0256, RD0257. Intercontinental ballistic missile PC-20А, PC-20Б, PC-20В]. KBKhA. Archived from the original on 5 May 2014.
- Krebs, Gunter Dirk (2016-06-13). "Dnepr". Gunter's Space Page. Retrieved 2016-07-05.
- Norbert Brügge. "Dnepr, Propulsion". B14643.DE. Retrieved 2015-07-15.
- Krebs, Gunter Dirk (2016-05-02). "R-36M Voivode (SS-18, Satan) ICBM". Gunter's Space Page. Retrieved 2016-07-05.
- ^ Pillet, Nicolas. "Le deuxième étage de Dniepr" [The second stage of the Dnepr] (in French). Kosmonavtika.com. Retrieved 2016-07-06.
External links
- KbKhA official information on the engine. (Archived)
- Encyclopedia Astronautica information on the propulsion module. (Archived)
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