The RD-856 (GRAU Index 8D69M), also known as the RD-69M, is a four-nozzle liquid-fuel rocket vernier engine, burning N2O4 and UDMH in a gas generator cycle.[3] It was used on the R-36, Tsyklon-2 and Tsyklon-3 second stage as thrust vector control by gimbaling of its nozzle.[3] The engine is distributed through a cylindrical structure that is integrated around the main engine RD-252 module. The structure includes aerodynamic protection for the nozzles.[2] The engine was started by a pyrotechnic ignitor.[2]
The engine was serially produced between 1965 and 1992. It was first launched on December 16, 1965 on an R-36 and its last launch was on January 30, 2009 with the last launch of the Tsyklon-3. The production capability was restarted for the Tsyklon-4 but with the apparent cancellation of the program the engine would still be out of production.[4]
See also
- R-36 - The Soviet ICBM for which the RD-856 was created.
- Tsyklon-2 - A Soviet small rocket that uses the RD-856.
- Tsyklon-3 - A Soviet small rocket that uses the RD-856.
- Tsyklon-4 - A Ukrainian small rocket project that would have used the RD-856.
- Yuzhnoe Design Bureau - The RD-856 designer bureau.
References
- ^ "RD-856". Encyclopedia Astronautica. Archived from the original on June 27, 2002. Retrieved 2016-07-06.
- ^ a b c Pillet, Nicolas. "Tsiklone - Le deuxième étage" [Tsyklon - The second stage] (in French). Kosmonavtika.com. Retrieved 2016-07-06.
- ^ a b c "RD-856". Yuzhnoye. Archived from the original on 29 May 2015.
- ^ Krebs, Gunter Dirk (2016-04-24). "Tsiklon". Gunter's Space Page. Retrieved 2016-07-05.
External links
- Yuzhnoye Design Bureau English-language home page Archived 2021-06-29 at the Wayback Machine
- Yuzhmash Home Page
| Liquid fuel |
|  | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solid fuel |
| |||||||||||||||||
| ||||||||||||||||||
Recent Comments