Questions tagged [soyuz-spacecraft]

Questions regarding the Soyuz manned spacecraft used by the Soviet and Russian space program.

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What is the lowest inclination orbit ever achieved by a crewed Soyuz mission?

Inspired by a recent question regarding Soyuz capsules I wondered what is the lowest inclination Soyuz mission? Highest inclination human spaceflights have been asked about here before. Soyuz 22 may ...
Organic Marble's user avatar
6 votes
1 answer
2k views

Could Soyuz spacecraft have saved the Columbia crew?

For the sake of the question, let's assume the STS-107 crew realizes in orbit that the heat shield is too damaged for reentry, but they realize it too late for shuttle Atlantis to rescue them in time. ...
Old Man John's user avatar
4 votes
1 answer
178 views

splashdown time Dragon vs Soyuz

Why did it take 3 days for dragon since detach from ISS till splashdown - while Soyuz would take 3 hours ?
user53342's user avatar
8 votes
2 answers
2k views

How do cosmonauts board the Soyuz spacecraft?

The Soyuz spacecraft consists of an orbital module, a descent module and a service module: (https://commons.wikimedia.org/wiki/File:Drawing-Soyuz-TMA-exp12.png) The spacecraft is fitted into a ...
Dave Gremlin's user avatar
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8 votes
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725 views

How was the ventilation valve supposed to work on Soyuz 7K-T (e.g. Soyuz-11)?

I'm reading the book Salyut - The First Space Station - Triumph and Tragedy and the usage of the ventilation valve on Soyuz-11 confuses me. There were no induction or exhaust pumps that pushes air ...
user3528438's user avatar
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10 votes
1 answer
750 views

What material is the wrinkled fabric(?) seen on the outside of some capsules and what is its purpose?

For example, the silver material on the Soyuz capsule Or the white wrapping on Canadarm and other robotic modules on the ISS My best guess is that it's beta cloth, used for fireproofing spacesuits, ...
Liam Dwyer's user avatar
4 votes
1 answer
149 views

What if Soyuz re-entered with orbital module attached?

Soyuz 5 and Soyuz TMA-11 survived reentry with an attached Service Module, which simply burned off. There have been no accidents where the Orbital Module has remained attached. What would be the ...
Abdullah is not an Amalekite's user avatar
9 votes
1 answer
1k views

Sending a Soyuz ship interplanetary - a plausible option?

This is my first time on Space Exploration SE, although I have participated quite a bit over on Worldbuilding. Anyway, as an avid sci-fi reader, I have been wondering if sending a Soyuz interplanetary ...
Lelu's user avatar
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6 votes
1 answer
399 views

Dragon as a Lifeboat for Soyuz

The only serious alternatives I have seen reported for the current Soyuz coolant problem are to either use the existing Soyuz, hopefully patching and testing it enough while attached to ISS to be able ...
manassehkatz-Moving 2 Codidact's user avatar
2 votes
1 answer
262 views

What was the coolant that leaked out of the Soyuz?

What exactly is the coolant used in the Soyuz external thermal loop, the one that just leaked out of a Soyuz docked to the ISS? I checked the Soyuz Crew Operations Manual but it just calls it the &...
Organic Marble's user avatar
6 votes
1 answer
871 views

How important is the radiator suspected of leaking on the Soyuz?

NASA has released a rather blithe blog about the Soyuz leak that occurred On Wednesday, Dec. 14, an external leak was detected from the Roscosmos Soyuz MS-22 spacecraft docked to the Rassvet module ...
Machavity's user avatar
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3 votes
1 answer
163 views

How long does the Soyuz Instrumentation/Propulsion Module remain attached to the Descent Module during re-entry?

Soyuz MS-22, attached to the ISS, has developed a leak in an external coolant loop in the Instrumentation/Propulsion Module. This spacecraft is needed to return the three cosmonauts who are currently ...
Dave Gremlin's user avatar
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1 vote
1 answer
86 views

What happens when an RCS thruster fails to fire?

Let's imagine a UDMH/N2O4 thruster (like on a Soyuz) has an issue where the oxidizer valve/line freezes solid, blocking the flow. What happens with the fuel? The propellants are pressure fed with a ...
Innovine's user avatar
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1 vote
1 answer
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What is the propellant consumption rate for Soyuz?

At what rate does a Soyuz propulsion system (KDTU-80) consume it's propellants? I am interested in the mass consumption rate of both the main engine (e.g. an s5.80) and a single DPO thruster. Please ...
Innovine's user avatar
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2 votes
0 answers
134 views

What is the most efficient method of landing for space capsules returning to earth? [closed]

I have read that the Russians don't land on water because they don't have access to a large warm-water coastline like the US. US has large swaths of land and water and most US capsules (Apollo, Dragon,...
user16734390's user avatar
3 votes
2 answers
339 views

Soyuz thruster placement

I notice that the Soyuz uses two high-thrust thrusters to translate in one direction along an axis, however some of the thrusters are located at a slight angle on either side of this axis, rather than ...
Innovine's user avatar
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12 votes
1 answer
2k views

Where can I download the Soyuz Crew Operations Manual?

Where can I download the Soyuz Crew Operations Manual?
Bob's user avatar
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8 votes
1 answer
635 views

What is the propellant mass for the Soyuz descent module?

I learned some time ago that the Soyuz capsules use hydrogen peroxide as a monopropellant. I'm trying to use this fact for a chemistry question posed to my students, but I cannot find anywhere how ...
Lux Claridge's user avatar
5 votes
1 answer
270 views

Soyuz flight books?

I have the Crew Operations Manual, but I wonder if any of the books carried onboard mentioned in it are available anywhere? There is a flight plan book, a nominal checklist, off-nominal, backup and ...
Innovine's user avatar
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5 votes
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How is roll alignment achieved by the Soyuz docking mechanism (SSVP)

The best description of the Soyuz docking system I could find is in the proceedings of the 6th Aerospace Mechanisms Symposium (scroll to PDF page 139, labeled page 143). The alignment process is ...
Hans's user avatar
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3 votes
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Soyuz: Do you know the coefficient drag and lift to drag ratio are during reentry?

I've been learning Python as a hobby the last two years. I like spaceflight too. Therefore I wrote this code to simulate the reentry of a Soyuz. I'd appreciate some feedback: https://github.com/fra-...
Francisco Martínez's user avatar
7 votes
1 answer
267 views

What is this thing on the right of the frame in this photograph? (STS-71)

What is this (blurred) thing that can be seen to the right of the frame in this photograph? (some versions crop it out) It is a photograph taken from Soyuz TM-21 of Mir and STS-71 Atlantis docked in ...
blobbymcblobby's user avatar
3 votes
0 answers
111 views

How much did NASA pay Roscosmos for the Soyuz to provide assured crew return services

The STS orbiter wasn't able to stay on orbit for very long, and the ISS had an SOP of having a return seat for each body on the station, so during the years of the Shuttle performing crew rotation ...
user40799's user avatar
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3 votes
2 answers
694 views

Dragon ballistic/drag coefficients?

I'm looking for some estimates of Dragon's ballistic or drag coefficients in its reentry (heat shield forward) configuration. Estimates for other spacecraft would be useful also as they would give me ...
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5 votes
0 answers
134 views

Soyuz 11 - communication transcript

Are there any communication transcripts available of Soyuz 11 spaceflight? I am especially interested in the part where pressure equalisation valve was opened way too fast and the crew died due to ...
Bartosz Brożek's user avatar
11 votes
1 answer
1k views

What is the procedure in case the ISS loses one of the evacuation crafts?

Suppose that a micrometeorite or a sudden failure renders one of the Soyuz inoperable, or that a routine inspection discovers a defect in one of them that makes it unsafe. What is the protocol to ...
Ginasius's user avatar
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17 votes
3 answers
5k views

Evacuating the ISS but wait, there's only one Spacecraft?

I was doing some research regarding the Soyuz as I'm currently planning a summer project in which I would build a close replica of a Soyuz when the question popped into my mind, "What would ...
James Ervin's user avatar
9 votes
2 answers
3k views

Soyuz for Sale?

Reading through some stuff on the interwebs I came across some information saying that some old Soyuz Capsules are keep in a junkyard. Does anyone know if it's actually possible to purchase one of ...
James Ervin's user avatar
2 votes
0 answers
188 views

How often are fewer than three astronauts present when moving a Soyuz spacecraft from one docking port to another?

CNN's Astronauts relocated a spacecraft outside the International Space Station (was it inside before?) says: Russian cosmonauts Sergey Ryzhikov and Sergey Kud-Sverchkov, along with NASA astronaut ...
uhoh's user avatar
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4 votes
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Why have astronauts had to take Soyuz capsules "out for a spin" on 15 separate occasions? (move from one Soyuz port to another)

NASA News item Space Station Crew to Relocate Soyuz to Make Room for New Crewmates says: Three residents of the International Space Station will take a spin around their orbital neighborhood in the ...
uhoh's user avatar
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1 vote
0 answers
91 views

Soyuz TMA Neptune IDS Button Lights Behavior On Click

I made a simple virtual Soyuz TMA Neptune IDS using simple coding (a work in process). The purpose of it is solely for the buttons location familiarization of the control panels. The buttons react on ...
Кедр's user avatar
3 votes
1 answer
356 views

What is the cost of production or sale of a Soyuz spacecraft?

Soyuz manned spacecraft have been operating for over fifty years and have made one hundred and forty five flights. There have been many upgrades and improvements and is still going strong. I imagine ...
Dave Gremlin's user avatar
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6 votes
1 answer
198 views

Docking orientation of Soyuz 4 and 5

I was discussing with a friend about the risk of solar panels colliding with each other if the rates imparted during undocking of similar crafts are higher. Which led to the question, then, why not ...
zephyr0110's user avatar
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1 vote
0 answers
146 views

Why do the Shenzhou seating assignments differ from Soyuz?

The Shenzhou spacecraft is China's crewed space vehicle. It is derived from the Russian Soyuz spacecraft. According to Wikipedia, The commander sits in the center seat on both spacecraft. However, ...
DrSheldon's user avatar
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5 votes
1 answer
317 views

Why will the Soyuz MS-17 be relocated on the ISS?

According to the Soyuz MS-17 Wikipedia page, the spacecraft is planned to relocate from Rassvet nadir to Poisk zenith on 10 March 2021. This 3 weeks before the next Soyuz, MS-18 arrives. From ...
Speedphoenix's user avatar
  • 5,324
18 votes
2 answers
2k views

Highest apogee of a Soviet/Russian crewed spacecraft?

I wonder which Soviet/Russian crewed spaceflight reached the highest apogee and how high. For America, the highest apogee ever reached is 1,368 kilometers (~ 850 mi) by Gemini 11 (except that America ...
Giovanni's user avatar
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2 votes
0 answers
151 views

What is the splash down speed of the manned dragon capsule? [duplicate]

What's the rated speed of the crewed dragon capsule? Do we have any data on the actual measurement for the demo mission? I'd also appreciate any info on speed for Soyuz, other soviet manned, Apollo, ...
Fabio's user avatar
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10 votes
1 answer
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Is there an equivalent of the Dragon 'claw' and Apollo umbilical fairing between the Soyuz crew and service modules?

The Apollo service module provided power etc. to the command module through umbilical connections covered by a fairing. When the two modules were separated, a 'guillotine' cut through the cables and ...
Dave Gremlin's user avatar
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3 votes
1 answer
191 views

How do Russians enumerate old Soviet space missions?

How are old Soviet space missions numbered in Russia? Were the earliest missions actually given a number, or are they referred to by their cosmonaut, or by a spacecraft nickname instead? Does the ...
DrSheldon's user avatar
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10 votes
1 answer
563 views

How close to a building has a Soyuz landed?

Soyuz capsules are designed to land onto land. To avoid the small chance of harming people or property, they are usually targeted to land in remote parts of Kazakhstan. However, some landings aren't ...
DrSheldon's user avatar
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-3 votes
1 answer
236 views

Why are the Soyuz and Progress spacecrafts about as expensive as the Soyuz rocket?

I have found this text: "In billion rubles: For Progress (without the cost of ~2.8 tonnes of cargo): Rocket: ~1.25 (Soyuz 2.1a) = 20.83 mil dollars Ship: ~0.9 (Progress MS) = 15 mil dollars ...
user avatar
3 votes
0 answers
85 views

Soyuz parachute cord/rope forces

I'm wondering about the forces (e.g., how much pressure is being applied, how much pulling force, etc.) experienced by the ropes of the Soyuz parachutes when they are deployed. Many thanks!
MORGAN ORMROD's user avatar
4 votes
2 answers
139 views

Do non-American space travellers train on Dragon capsule as well?

Soyuz is a spacecraft which still uses technologies from soviet era. The Dragon capsule is state of the art with its electronic upgrades. With Russia and US sharing the International Space Station ...
Harish's user avatar
  • 390
14 votes
1 answer
443 views

Will Soyuz spacecraft be able to visit the Lunar Gateway?

I mean launch from Earth, dock to the gateway and come back.
Anixx's user avatar
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6 votes
1 answer
109 views

Are there any differences in docking procedures between ISS and manned capsules vs. unmanned capsules?

The Russian Soyuz has an extensive history in docking with ISS with both manned and unmanned capsules. SpaceX just recently demonstrated manned-capsule docking with ISS with a history of unmanned ...
aranedain's user avatar
  • 463
2 votes
1 answer
190 views

Why were there two Soyuz 39?

Why were there two Soyuz missions numbered 39? There was Soyuz 7K-T No.39 in 1975, and Soyuz 39 in 1981. Questions about similarly confusing numbering by NASA: Why did Apollo mission numbering skip ...
DrSheldon's user avatar
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5 votes
1 answer
189 views

Why does the ISS occasionally operate with just 3 crew members?

There have many instances where the ISS only has 3 crew members, often for many weeks. This places significant strain on workload and productivity. Why isn't a new crew launched quicker?
Eloy Falco's user avatar
10 votes
3 answers
2k views

Why doesn't Roscosmos launch Soyuz spacecraft with only Russians on board?

Just very curious. There are three seats in the Russian Soyuz spacecraft, and sometimes just one astronaut of the three is a Russian and the other two are either one American and someone from yet ...
user avatar
4 votes
1 answer
253 views

How did the atmospheres of Soyuz, Shuttle, Mir, and ISS compare?

Soyuz and the Space Shuttle each docked with Mir and the International Space Station. When docked, the crew vehicle and station each share a common atmosphere for the crew to breathe. However, how ...
DrSheldon's user avatar
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1 vote
0 answers
90 views

What are these two items sticking out of Soyuz capsule MS-13 with returning Expedition 61 Crew? [duplicate]

At 18:55and 19:00 in NASA Videos' NASA Television Video File- MS 13 Hatch Closing Undocking Landing - February 6, 2020 what ...
uhoh's user avatar
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