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Soyuz-7 (rocket family)

From Wikipedia, the free encyclopedia

ManufacturerJSC SRC Progress
Country of originRussia
Height46.5 m (153 ft)[2]
Diameter4.1 m (13 ft)[3]
Mass270,000 kg (600,000 lb)[4]
Payload to LEO
Mass9 t (8.9 long tons; 9.9 short tons)[4]
Associated rockets
ComparableSoyuz-2 (rocket)
First stage
Diameter4.1 m (13 ft)[3]
Thrust3,330 kN (750,000 lbf)[6]
Specific impulseSea Level:321 seconds
Vacuum: 356 seconds
FuelCH4 / LOX[4]
Second stage
Diameter4.1 m (13 ft)[3]
Thrust737 kN (166,000 lbf)[6]
FuelCH4 / LOX[4]

The Soyuz-7 (Russian: Союз-7) is a proposed family of new Russian rockets proposed by JSC SRC Progress in the mid-2010s, to replace the legacy Soyuz for launch after the early 2020s. JSC SRC Progress had been the manufacturer and custodian of the Soyuz family design for many decades.[2] The new design concept was a part of Project Feniks (Russian: Феникс, lit.'Fenix').[not verified in body] While all previous iterations of the Soyuz family had their roots firmly set on the R-7 ICBM legacy, the new rocket, designated Soyuz-7 in 2013, was to be a completely new design from the ground up. The proposed new design was to be based on a new propellant: LOX and liquid methane, use a new tank structure, new propulsion, and would do away with the famous R-7 tulip[clarification needed], and have thrust vector control in the main engine rather than using vernier engines.[2] It was conceived in 2013 to be a scalable family with three versions covering the medium to heavy payload ranges.[2]

The project is considered[by whom?] as fundamental to assure access to space for Russia, since it[who?] is transitioning exclusively to the Angara family, and the Soyuz-7 would add redundancy in case of an Angara stand down.[4]

As conceived in the mid-2010s, the smallest version was to be a 270-tonne rocket, intended as a replacement of the Soyuz-2 rocket, with an expected payload to LEO of 9 t (9,000 kg). It will use a single RD-0164 engine on the first stage, and a RD-0169 engine on the second.[7] The first engineering design was expected to be completed by 2016,[needs update] and the first flight expected as early as 2022.[citation needed] The use of just two stages for the base version, and the simplification of subsystems was intended to product a more reliable and less-expensive launch vehicle, with the lightest version expected to be cheaper than the Soyuz-2.[8]


During an interview with the Kazakhstani magazine Space Research and Technologies during 2013, Mr. Kirilin, CEO of TSKB Progress, explained the conception of the project.[8] When the Rus-M project was cancelled, TSKB Progress started work on a methane fueled launch vehicle under the Roscosmos Magistral research program.[8] This work was self funded by the company, and looked to replace the Soyuz vehicle and keep the vehicle design capabilities within the company.[citation needed]

The venerable Soyuz rocket vehicle would be an approximately 60-year-old design by 2020 and it could not remain competitive with the new vehicles,[according to whom?] like the Falcon 9. It was described by Progress CEO, Mr. Kirilin, as technologically and operationally hopelessly outdated.[8] It has conical sections, where each panel is unique, it uses six engines with 24 nozzles, most rocket manufacturing tasks include a number of manual operations, it even requires five different fluids: kerosene, liquid oxygen, hydrogen peroxide, gaseous nitrogen and gaseous helium. Looking forward, the price of RG-1 fuel was going up, since it could only be distilled from a single oil field, that, by 2015, was expected to be depleted soon.[8]

The proposed Soyuz-7 would use the same diameter for all sections of the rocket, 3.6 m (12 ft), use liquid methane and liquid oxygen, have a single engine with a single nozzle on each stage, and automate[clarification needed] most tasks.[8] The proposed new rocket was conceived to used the existing Soyuz pads and installations after some modifications. Liquid methane is cheap, Russia has ample reserves and it has a huge installed base. It also has some important thermal and polymerizing properties that paves the way for reusable rockets. The rocket was expected to use the KBKhA RD-0164[clarification needed] engine in the core[clarification needed] stages, and a methane version of the KBKhA RD-0124[clarification needed] in the upper stage.[8]

During an August, 2015 interview with Ria Novosti, Mr. Kirilin stated that a preliminary design was expected in 2015 or 2016,[needs update] that they intended to first develop a light version[clarification needed], that they anticipated an initial test flight of the first prototype in 2022 and that the propulsion would be the RD-0164 for the cores[clarification needed] and the RD-0169[clarification needed] rocket engine for the upper stage.[4]


In the mid-2010s, Soyuz-7 was conceived to be a scalable family, with three conceptual versions:

  • Basic version, designed to replace the Soyuz-2.1a/b rockets, would use use just a first and a second stage. It was conceived to have a payload to a 200 km (120 mi) circular LEO orbit of 9 t (8.9 long tons; 9.9 short tons).[9][2]
  • A three-core-stage version, designed as a crew carrier vehicle, that would use a central core and two equal cores on the side as boosters. This design concept was to have not an air-ignited second stage to eliminate air start risk. It was expected to have a payload to LEO of 16 t (16 long tons; 18 short tons).[9][2]
  • The heaviest version with maximum capability.[10] It was expected to achieve a payload to LEO of 25 t (25 long tons; 28 short tons).[9][2]

See also


  1. ^ "Российскую ракету с метановыми двигателями хотят назвать "Союз-7"" [Russian rocket with methane engine could be named Soyuz-7] (in Russian). RIA. 2017-07-18. Retrieved 2017-11-23.
  2. ^ a b c d e f g Zak, Anatoly (2014-07-31). "Soyuz-5 rocket". RussianSpaceWeb. Retrieved 2015-08-20.
  3. ^ a b c d Voroncov, Dimitry (2013). ""Союз" с метаном" [Soyuz on Methane] (PDF). Space Research and Technologies (in Russian). 3 (8): 47–51. Retrieved 2015-08-20.
  4. ^ a b c d e f g "РКЦ "Прогресс": летный образец ракеты "Союз-5" ожидаем к 2022 году" [RCC "Progress": expects to fly "Soyuz-5" prototype by 2022] (in Russian). RIA Novosti. 2015-08-18. Retrieved 2015-08-20.
  5. ^ ГОДОВОЙ ОТЧЕТ Акционерного общества "Конструкторское бюро химавтоматики" (АО КБХА) за 2013 год ["Chemical Automatics Design Bureau" (JSC KBKhA) Annual Report for 2013] (PDF) (Report) (in Russian). JSC KBKhA. 2014-05-28. p. 37. Retrieved 2015-08-20.
  6. ^ a b ГОДОВОЙ ОТЧЕТ Акционерного общества "Конструкторское бюро химавтоматики" (АО КБХА) за 2014 год ["Chemical Automatics Design Bureau" (JSC KBKhA) Annual Report for 2014] (PDF) (Report) (in Russian). JSC KBKhA. 2015-05-22. p. 43. Retrieved 2015-08-20.
  7. ^ "Russia's new rocket will be named Fenix — source". Russian News Agency TASS. 2015-04-27. Retrieved 2015-08-20.
  8. ^ a b c d e f g Nowakowski, Tomasz (2015-08-20). "Russia to build new eco-friendly Soyuz-5 rocket by 2022". Retrieved 2015-08-20.
  9. ^ a b c "Делегация "ЦСКБ-Прогресс" приняла участие в открытии международной выставки "ILA Berlin Airshow 2014"" [Samara Space Center participates in the International Exhibition «ILA Berlin Airshow 2014»] (in Russian). JSC SRC Progress. 2014-05-06. Retrieved 2015-08-20.
  10. ^ "What Roscosmos showed, and said, during the Paris Air Show". Space Digest. 2015-06-22. Retrieved 2015-08-20.

External links

This page was last edited on 8 April 2021, at 09:53
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