Questions tagged [soyuz-spacecraft]

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

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21
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2answers
3k views

Why did Soyuz TMA-18M take two days to reach the ISS?

Typically, a Soyuz crew vehicle takes 4 orbits to reach the ISS, but the Soyuz TMA-18M took 34 orbits or 2 days to reach it. Why is there so much variation from typical missions?
16
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1answer
841 views

Does the Soyuz spacecraft chemically stabilize its hydrogen peroxide (H₂O₂) to remain ISS-dockable for 200+ days?

Hydrogen peroxide (H2O2) from the local shop (dilute, 2-3%) sometimes has a stabilizer to slow its breakdown rate and increase its "shelf-life", since we'd like to keep it around the house on our ...
6
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1answer
177 views

Does the Soyuz spacecraft really try to achieve attitude accuracy of 0.5° from GLONASS and GPS signals?

This answer mentions that the Wikipedia article Soyuz MS (Союз МС, the latest revision of the Soyuz spacecraft, evolution of the Soyuz TMA-M) says: Instead of relying on ground stations for orbital ...
39
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4answers
5k views

Soyuz landing ground detection

How does Soyuz detect the ground to fire its retro rocket at the end stage? Is there any paper/reference describing the full entry descent and guidance algorithm and sensor suite used in Soyuz? If ...
23
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2answers
7k views

What happens to Soyuz reentry capsules after landing?

What happens to Soyuz reentry capsules after landing? I guess some must go to museums, but quite a lot of them have returned now. Is there any indication of where and how they are stored?
11
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1answer
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How does a gamma ray altimeter work? What kind of sensor is used?

The answers to the Space SE question Soyuz landing ground detection really surprised me. A gamma ray altimeter is used by the returning Soyuz capsule to detect the presence of solid ground immediately ...
4
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1answer
251 views

Do the Soyuz spacecraft bringing astronauts and supplies to the ISS use Ukraine-built Kurs systems?

A comment below this great answer about the Kurs navigation and docking system linked to the following page on the Ukrainian company Elimz website: http://www.elmiz.com/en/product/orbitalnyj-servis-...
24
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4answers
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How could the 2018-08-30 Soyuz MS-09 / ISS leak be so slow?

The leak reportedly led the ISS to lose 0.8 millibars of air pressure per hour, which is both big considering what was at stake and low for a 2-mm hole when the outside is near to complete vacuum. Am ...
9
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2answers
2k views

What is the ISS maximum altitude?

I see two threats to the ISS as its altitude goes up: Cosmic/solar radiation, which would endanger the crew and the electronics aboard. Orbital debris, which would have higher relative speed and ...
16
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3answers
2k views

Can a single Soyuz return a crew of six back to Earth?

Let's say that the ISS has to be immediately evacuated and that one of the two Soyuz is broken. Could the crew quickly remove "unnecessary weight" (seats maybe?) and fit six person to return back to ...
15
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1answer
3k views

How fast can the crew evacuate the ISS? (ACRV)

An important advantage of having a space station in LEO, as opposed to a space ship orbiting another celestial object, is allegedly that the crew can be saved by a quick return to Earth. But what ...
9
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2answers
887 views

Would Soyuz meet NASA current rating standards for manned spaceflight?

If NASA were to apply the safety standards it is using on the CCtCAP program (Dragon V2 and CST-100 now chosen) would Soyuz meet those standards? I suppose it helps if we are clear on what the ...
10
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2answers
4k views

Why will the Orion system land on water, while the Soyuz lands on land?

I wonder why the Orion Multi-Purpose Crew Vehicle will only allow ocean landings while the Soyuz spacecraft is capable of landing on land? Also, what mode of landings does the Chinese space program ...
10
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2answers
490 views

Can Soyuz be used to perform maintenance on satellites

The Space Shuttle made several servicing mission for satellites, most famous ones would be to service Hubble. Would theses kinds of operations be feasible with a Soyuz spacecraft ? Would it be ...
9
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2answers
2k views

Microgravity indicators

As mentioned in the YouTube clip below and in the image, in the Soyuz craft hangs small toys or dolls as microgravity indicators. Is this really the purpose of the dolls being hung? Are people not ...
5
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1answer
642 views

New Russian Sokol space suit [closed]

According to the pictures of the mission Soyuz MS-03, the crew is wearing a new "Sokol" space suit. The previous crew was still wearing the 1980 "vintage" KV2 version. Any information about this new ...
4
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2answers
230 views

What do the insulation and meteorite protection layers being opened on the Soyuz MS-09 spacecraft look like?

This current news item in TASS Russian cosmonaut Kononenko approaches Soyuz MS-09 spacecraft for inspection says: Earlier in the day, the two Russian cosmonauts began their six-hour spacewalk, ...
3
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2answers
478 views

Why will Soyuz MS-04 bring only two crew to the ISS?

Soyuz MS-04 has the distinction of being the first manned launch of 2017, and the first (at least in a while?) to bring only two, rather than three crew members to the ISS. Is there an official ...
3
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1answer
846 views

Where is the hole now? (ISS/Soyuz spacecraft hole)

Gizmodo's Report: ISS Hole Drilled From the Inside, Cosmonaut Says has made me realize I've lost track of the hole. It was in the part of a Soyuz spacecraft docked to the ISS wouldn't contain the crew ...
2
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1answer
771 views

Why does “Tim Peake's capsule” look like it's copper now?

What are these capsules made of? This is the Expedition 47 return capsule that brought Astronauts Yuri Malenchenko, Timothy Peake, and Timothy Kopra back to Earth. According to IFL Science!: The ...
-2
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1answer
323 views

How can spacecraft be reusable for new missions? [closed]

When a spacecraft enters earth's atmosphere, it is totally destroyed and comes down as a single probe, so how can a spacecraft be reusable for new missions? The Soyuz spacecraft is launched on a ...
13
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1answer
2k views

How do the Soyuz flight control sticks operate?

I would like informations on the flight controls of the Soyuz spacecraft. Especially the two control sticks, as shown in this picture (of a Soyuz simulator). I'm particularly interested by the user ...
26
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3answers
2k views

August 30th 2018 Soyuz leak, any dangers for re-entry?

On August 30th 2018, Soyuz MS-09 had a leak that was fixed by the ISS crew (source). Does the leak/fix have any consequences on using the Soyuz for returning to Earth? Would the fix hold the stress ...
14
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2answers
2k views

Do Russian and American spacecraft use the same docking mechanism?

Back in the days of the Apollo era, the Apollo–Soyuz Test Project had the two craft meeting each other in orbit and docking. The stated reason for this was so that if a spacecraft from one country was ...
22
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1answer
1k views

What are the reasons Soyuz's lifespan in orbit is limited?

Following the recent Soyuz failure news, I found out that the currently docked Soyuz expires in the foreseeable future, leaving the crew with no means to return back to Earth. What are the reasons ...
21
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2answers
6k views

Why were Space Shuttle astronauts able to walk off the orbiter?

I am watching loads of ISS related videos and there is one detail I recently noticed; At the time, when Space Shuttles were still in operation and visiting ISS, when astronauts returned home, they ...
20
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1answer
5k views

Why is a stick required to operate Soyuz's computer?

In this screenshot from the recent Soyuz TMA-12M launch, a crewmember is seen using a stick to enter commands into the computer: Is this stick standard, taken on all Soyuz flights? Also, why aren't ...
19
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1answer
2k views

How did the attitude system of the uncrewed Soyuz 7K-OK No.1 fail on the launch pad in 1966, killing ground staff as LES was activated?

Wikipedia has a stub article on the loss of the Soyuz 7K-OK No.1 test flight in 1966-12-14, but this part doesn't make sense to me: However, once the Soyuz rocket's engines ignited, they did not ...
14
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2answers
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Why is the descent module of the Soyuz in the middle of its stack?

The Soyuz is made up of three major components/modules. The Orbital module on top, basically a sphere, which is basically extra room, and contains the toilet, which allows for some modicum of ...
13
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1answer
3k views

How is the periscope port on Soyuz spacecraft secured for the atmospheric reentry?

Soyuz Backup Periscope (ВСК-4) is used in Soyuz spacecraft to align itself for orbital corrections, deorbit burn, and rendezvous with the International Space Station. Here is a cute closeup photograph ...
11
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3answers
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Could a Soyuz land in water?

While watching Soyuz exp. 37/1 land, I was struck with a thought: that capsule looks an awful lot like a submarine. This seems to be a problem if the crew ever needed to make an emergency landing ...
11
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1answer
1k views

Flashing lights on soyuz underside?

Watching the recent landing video of TMA-16M, I noticed a flashing light on the underside of the soyuz (video here). There appears to be an off-centre, bright flash approximately every 10 seconds. ...
11
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2answers
691 views

How do items from the Russian and Soviet space programs end up in private collections?

A member today posted this photo showing a complete instrument panel from a Soyuz TM capsule, and a globus instrument from a Voskhod capsule: Both items are in their private collection. Only 5 ...
11
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2answers
370 views

Does Russia still manufacture parts for their space program that would otherwise be obsolete?

The Russian space program is notable for continuing to use the same designs that have been successful for decades. For example, the Soyuz boosters and Soyuz crew vehicles in use today are still the ...
10
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2answers
4k views

What is the outside of the Soyuz capsule covered in?

When you look at a Soyuz, it seems like the descent and orbital modules are covered in some kind of fabric-like material. You can see wrinkles and it does not look like traditional metal as you might ...
6
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1answer
1k views

What is the maximum velocity at which Soyuz TMA-M may transit through Earth' atmosphere at reentry without a heat-shield?

A quick follow-up to Re-entry Heat Shield Alternative Instead of looking for an alternative to heat-shield, I'd like to draw from analogous naval tactics I heard about; Back in the 1950's to 1960's, ...
5
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2answers
1k views

What does Soyuz's button-pushing “fancy stick” look like? Are there others?

In the Smarter Every Day video How to FLY A SPACESHIP to the SPACE STATION - Smarter Every Day 131 the host Destin Sandlin (seated in the center seat of a Soyuz capsule) asks astronaut Scott Kelly (...
14
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1answer
955 views

Can Soyuz spacecraft operate without the orbital module?

Normally, before reentry, Soyuz separates into 4 chunks - the orbital module, the service module, the reentry module, and the periscope. Only the reentry module survives the reentry. Let's imagine a ...
13
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1answer
583 views

How many people have returned to Earth in a different type of vehicle than the one that launched them into space?

Recently we had the 15 year anniversary of Expedition 1 of the ISS. That particular crew launched in a Soyuz (TM-31) and returned on a Space Shuttle (Discovery, STS-102), which I found a remarkable ...
13
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1answer
2k views

Do American astronauts wear Sokol space suits when flying on a Soyuz?

The Wikipedia article on the Sokol space suit seems to suggest that all personel traveling on a Soyuz vehicle must wear a Russian made spacesuit: Each Soyuz crew member is provided with a made-to-...
12
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2answers
1k views

Are any of these Soyuz controls involved in separating the orbital module?

According to this Q & A, it's very likely that the Soyuz spacecraft's orbital module can be manually separated independent of other spacecraft operations. On this CollectSpace page, there's an ...
11
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1answer
1k views

Can a Soyuz-MS still propel itself back to earth if all its Hydrogen Peroxide decomposed?

In this answer it is stated that: If the fuel fully decomposes then return to Earth is still possible but only via ballistic descent I find it a little bit surprising, but maybe there is enough Δv ...
11
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1answer
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How does the landing accuracy of Dragon (under parachutes) compare to Soyuz?

The Dragon capsule landed yesterday, and I saw this picture of it: Historically, capsules had a rather large uncertainty when landing, especially with parachutes. This picture was obviously taken ...
9
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1answer
388 views

Any risk from Soyuz 22-ton fuel dump?

Following the recent mishap with the Soyuz, Kazakhstan's deputy minister for defense and the aerospace industry said that about 22 tons of fuel (kerosene and liquid oxygen) were dumped/fell over the ...
9
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2answers
1k views

What influenced the shape of the Soyuz descent module?

The original Vostok and Voshkod space vehicles were mostly spherical shapes. The Americans went with vaguely conical/capsule shapes. But Soyuz from the beginning has had a sort of gumdrop shape for ...
8
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2answers
1k views

What does the abbreviation “MS” for the current Soyuz version name mean?

A quick search the meaning of the abbreviations for the previous versions of the Soyuz spacecraft easily tells me their meaning: Soyuz T. 'T' is for транспортный, ...
8
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1answer
378 views

On Mir, did they ever move a Soyuz at the front end, to a side docking port using Lyappa?

On Mir, the docking module was at the front end of the station. It technically had 6 ports (one was used to connect to Mir itself, so 5 exposed). In general the docking node had one active port ...
8
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4answers
340 views

Why is Soyuz's third stage's engine cutoff the most intense?

Based on the motion and reaction of the cosmonauts, the 3rd stage engine cutoff (cued video) at about T+ 08:46 in this video of a Soyuz ascent causes greater ...
7
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3answers
1k views

To what extent is the orbital Time Period of ISS affected by soyuz thrusters?

Numerically, to what extent is the orbital time period of ISS affected during the time when it boosts back higher to gain the lost altitude, using Soyuz thrusters/engines?
6
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1answer
872 views

What abort modes does Soyuz have in space?

In Progress 59 mission, the service module was damaged and venting pressured gas, which caused the spacecraft to tumble. What could be done if similar situation occurs on a Soyuz? Or generally, What ...