RD-8

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For the Dominican Republic national highway #8, see DR-8.
RD-8 (РД-8)
Country of originSoviet Union
First flightApril 13, 1985
DesignerYuzhnoye Design Bureau
ManufacturerYuzhmash
ApplicationSecond Stage Vernier
Associated LVZenit
SuccessorRD-809M
StatusIn Production
Liquid-fuel engine
PropellantLOX / RG-1
Mixture ratio2.4
CycleStaged Combustion
Configuration
Chamber4
Performance
Thrust, vacuum78.45 kN (17,640 lbf)
Chamber pressure7.747 MPa (1,123.6 psi)
Specific impulse, vacuum342 s (3.35 km/s)
Burn time1100 s
Gimbal range±33°
Dimensions
Length1,500 mm (59 in)
Diameter4,000 mm (160 in)
Dry weight380 kg (840 lb)
Used in
Zenit family second stage
References
References[1][2][3][4][5][6]

The RD-8 (Russian: РД-8 and GRAU Index: 11D513) is an Ukrainian liquid propellant rocket engine burning LOX and RG-1 (a rocket grade kerosene) in a oxidizer rich staged combustion cycle.[5][6] It has a four combustion chambers that provide thrust vector control by gimbaling each of the nozzles in a single axis by +/- 33°.[2] It was designed in Ukraine by Yuzhnoye Design Bureau as the vernier thruster of the Zenit (GRAU: 11K77) second stage.[7] As such, it has always been paired with the RD-120 engine as main propulsion.[8][1]

It can only be started once, and as a high altitude engine it has a thrust of 78.45 kN (17,640 lbf) and a specific impulse of 342 s (3.35 km/s).[5][6] It is the first ever steering engine to use the staged combustion cycle, and as such is the basis for a family of planned engines for the Mayak launch vehicle family.[3]

References

  1. ^ a b Gunter Dirk Krebs (2015-12-15). "Zenit family". Gunter's Space Page. Retrieved 2016-07-14.
  2. ^ a b Brügge, Norbert (2016-07-11). "Ukrainian space-rocket and missile liquid-propellant engines". B14643.de. Retrieved 2015-08-06.
  3. ^ a b Degtyarev, A . V.; Shulga, V . A.; Zhivotov, A . I.; Dibrivny, A . V. (2013). "Создание семейства кислородно-керосиновых жидкостных ракетных двигателей на базе отработанных технологий для перспективных ракет-носителей гп «Кб «Южное»" [The development of LOX - kerosene liquid rocket engines family for perspective launch vehicles of SDO Yuzhnoye based on proven technologies] (PDF). Авиационно - космическая техника и технология (in Russian). 2013 nr. 01 (98). National Aerospace university them. NE Zhukovsky: 44–50. ISSN 1727-7337. Retrieved 2016-07-11.
  4. ^ "RD-8". Defense Industry Of Ukraine Products And Services. Retrieved 2016-07-11.
  5. ^ a b c "RD-8". Yuzhnoye. Retrieved 2016-07-11.
  6. ^ a b c "Liquid rocket engine RD-8". Yuzhmash. Retrieved 2015-05-29.
  7. ^ "Двигатели 1944-2000: Аавиационные, Ракетные, Морские, Промышленные" [Aviadvigatel 19442-2000: Aviation, rocketry, naval and industry] (PDF) (in Russian). pp. 265–266. Retrieved 2015-07-25.
  8. ^ Hendrickx, Bart; Vis, Bert (2007-10-04). Energiya-Buran: The Soviet Space Shuttle (UK 2007 ed.). Springer. p. 80. ISBN 978-0-387-69848-9.

See also

  • RD-120 – The Zenit second stage main engine which is the companion of the RD-8 and the basis for some of its derivatives.
  • Zenit – The launch vehicle family for which the RD-8 was developed.
  • Mayak – Prospective Ukrainian launch vehicle family for which the RD-805, RD-809M and RD-809K are being developed.
  • Yuzhnoe Design Bureau - The RD-8 designer bureau.
  • Yuzhmash - A multi-product machine-building company that's closely related to Yuzhnoe and manufactures the RD-8.

External links

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