Author Topic: Soyuz Q & A  (Read 28743 times)

Offline brahmanknight

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Re: Soyuz Q & A
« Reply #40 on: 03/04/2014 02:20 PM »
Why does the Soyuz undock from the ISS only when the station has changed attitude from Node 2 in the velocity direction to the Soyuz releasing in retrograde?

Offline Nicolas PILLET

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Re: Soyuz Q & A
« Reply #41 on: 03/04/2014 06:59 PM »
I've just realized that EVERY Soyuz spaceships make a deorbit burn with Delta-V = 115,2m/s.

On the Soyuz Crew Operations Manual, available on L2, this value is also quoted.

But I don't understand why the Delta-V does NOT depends on the altitude of the orbit at the moment of the deorbit burn ?
Nicolas PILLET
kosmonavtika.com : The French site on Russian Space

Offline anik

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Re: Soyuz Q & A
« Reply #42 on: 03/04/2014 07:33 PM »
I've just realized that EVERY Soyuz spaceships make a deorbit burn with Delta-V = 115,2m/s

Soyuz TMA-09M - 128 m/s
Soyuz TMA-08M - 128 m/s
Soyuz TMA-07M - 128 m/s
Soyuz TMA-06M - 128 m/s
Soyuz TMA-05M - 128 m/s
Soyuz TMA-04M - 115 m/s
Soyuz TMA-03M - 115 m/s

Offline Nicolas PILLET

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Re: Soyuz Q & A
« Reply #43 on: 03/04/2014 08:19 PM »
I've just realized that EVERY Soyuz spaceships make a deorbit burn with Delta-V = 115,2m/s

Soyuz TMA-09M - 128 m/s
Soyuz TMA-08M - 128 m/s
Soyuz TMA-07M - 128 m/s
Soyuz TMA-06M - 128 m/s
Soyuz TMA-05M - 128 m/s
Soyuz TMA-04M - 115 m/s
Soyuz TMA-03M - 115 m/s

OK, I was not correct ! :-)

But it is still very strange to me that the dV is so constant, given each of these spaceships had different orbits !
Nicolas PILLET
kosmonavtika.com : The French site on Russian Space

Offline TJL

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Re: Soyuz Q & A
« Reply #44 on: 05/28/2014 11:03 PM »
Of the four previous Soyuz spacecraft (TMA 8, TMA 9, TMA 10, and TMA 11) that docked with ISS on the 4th orbit, which flight holds the record for the quickest docking...hours / minutes MET?
Thank you!

Offline anik

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Re: Soyuz Q & A
« Reply #45 on: 05/29/2014 02:21 AM »
TMA-08M: 5h 44m 56s
TMA-09M: 5h 39m 00s
TMA-10M: 5h 46m 32s
TMA-11M: 6h 13m 37s
TMA-13M: 5h 46m 21s

Offline TJL

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Re: Soyuz Q & A
« Reply #46 on: 05/29/2014 10:20 PM »
Excellent...thanks, Anik!

Offline Nicolas PILLET

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Re: Soyuz Q & A
« Reply #47 on: 07/20/2014 08:25 PM »
In 1997, starting with Soyuz TM-25, the gyrostabilized AS-VKA antenna of Kurs system was replaced by 1ASF antenna, for mass savings.

But, today, Soyuz TMA-M spaceships have AS-VKA again. Do we know when they were put back in operation ?
Nicolas PILLET
kosmonavtika.com : The French site on Russian Space

Offline OV135

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Re: Soyuz Q & A
« Reply #48 on: 08/02/2014 10:11 PM »
Anyone have diagrams of the TMA flight instrument panel? I'm curious on how much the real thing matches the movie Gravity. 

Offline Danderman

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Re: Soyuz Q & A
« Reply #49 on: 01/19/2016 10:21 PM »
Anyone have diagrams of the TMA flight instrument panel? I'm curious on how much the real thing matches the movie Gravity. 

Probably in L2.

Online ZachS09

Re: Soyuz Q & A
« Reply #50 on: 02/24/2016 07:21 PM »
Remind me if this question was answered already:

Why do nearly all of the ISS Soyuz launches take place at night? I mean, compared to the Space Shuttle, the lighting conditions for all logged flights are the opposite; the Shuttle launched more during the day (100 as opposed to 35 night launches).
« Last Edit: 08/07/2016 04:59 PM by longdrivechampion102 »
"Falcon 9 has landed. Landing operators, move into Procedure 11.100 on Recovery Net."

Offline Danderman

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Re: Soyuz Q & A
« Reply #51 on: 03/07/2016 11:21 AM »
Remind me if this question was answered already:

Why do nearly all of the ISS Soyuz launches take place at night? I mean, compared to the Space Shuttle, the lighting conditions for all logged flights are the opposite; the Shuttle launched more during the day (99 as opposed to 36 night launches).

Launch time is a function of payload requirements.

Offline Danderman

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Re: Soyuz Q & A
« Reply #52 on: 03/07/2016 03:41 PM »
And now for something different:



this is a short animation showing the nominal maneuver of the upper stage after separation of the Progress payload, as developed by the designers of the Soyuz rocket.  The movement is generated by some sort of gas system.

Online Stan Black

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Re: Soyuz Q & A
« Reply #53 on: 03/10/2016 08:19 AM »
And now for something different:



this is a short animation showing the nominal maneuver of the upper stage after separation of the Progress payload, as developed by the designers of the Soyuz rocket.  The movement is generated by some sort of gas system.

You can see the pipe in this picture. It is used to vent the oxygen tank.
http://www.roscosmos.ru/media/gallery/big/22014/177239996.jpg

See also this video, the burst at payload separation.
http://forum.nasaspaceflight.com/index.php?topic=33868.msg1180079#msg1180079

Offline Danderman

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Re: Soyuz Q & A
« Reply #54 on: 03/10/2016 12:05 PM »
Which is the pipe? Are those things wrapped in silver plastic telemetry antennas?

Online Stan Black

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Re: Soyuz Q & A
« Reply #55 on: 03/10/2016 07:45 PM »
Which is the pipe? Are those things wrapped in silver plastic telemetry antennas?

See page 16
https://forum.nasaspaceflight.com/index.php?topic=17286.msg732670#msg732670

Offline Danderman

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Re: Soyuz Q & A
« Reply #56 on: 03/11/2016 02:16 PM »
When the Soyuz rocket is mated to the Volga upper stage, the connecting ring between them is called SZB "standard payload section" by RussianSpaceWeb:

http://www.russianspaceweb.com/volga.html

A similar item on Soyuz is called the "launch vehicle transfer compartment" when integrated with Progress or Soyuz spacecraft:

http://inspaceforum.ru/en/post/roscosmos-transfer-compartment-was-docked-with-sc-soyuz-tma-19m

Are the different terms for the same type of hardware simply a function of two different companies doing the processing (TsSKB vs RSC Energia) or are these adapter rings really that different?



« Last Edit: 03/11/2016 02:33 PM by Danderman »

Online Stan Black

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Re: Soyuz Q & A
« Reply #57 on: 03/11/2016 02:59 PM »
When the Soyuz rocket is mated to the Volga upper stage, the connecting ring between them is called SZB "standard payload section" by RussianSpaceWeb:

http://www.russianspaceweb.com/volga.html

A similar item on Soyuz is called the "launch vehicle transfer compartment" when integrated with Progress or Soyuz spacecraft:

http://inspaceforum.ru/en/post/roscosmos-transfer-compartment-was-docked-with-sc-soyuz-tma-19m

Are the different terms for the same type of hardware simply a function of two different companies doing the processing (TsSKB vs RSC Energia) or are these adapter rings really that different?





SZB is the combination of transfer compartment PKhO and fairing GO

Quote
 Сборочно-защитный блок (СЗБ) предназначен для обеспечения защиты КА от воздействия внешней атмосферы и тепловых потоков и для сопряжения КА с РН. В состав СЗБ входят головной обтекатель (ГО) и переходной отсек (ПхО). Для запусков КА с помощью РН Союз-2 в составе СЗБ планируется использование штатного ГО 11С529, массой 1050 кг и штатного ПхО массой 220 кг.Вместе с тем, в случае выведения КА с помощью РН Союз-2 (этапа разработки 1б) в составе СЗБ может использоваться унифицированный ГО 14С74 массой 2100 кг и ПхО массой 350 кг.

Quote
борочно-защитный блок (СЗБ) в составе головного обтекателя (ГО) и переходного отсека, (ГО изготавливается по разделу II ФКПР-2015). Для выведения КА Ресурс-П № 2  используется сборочно-защитный блок 196КС, включающий головной обтекатель (ГО) 81КС диаметром 4,11м, c необходимой доработкой;

Offline Danderman

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Re: Soyuz Q & A
« Reply #58 on: 03/11/2016 04:29 PM »


Quote
Сборочно-защитный блок (СЗБ) предназначен для обеспечения защиты КА от воздействия внешней атмосферы и тепловых потоков и для сопряжения КА с РН. В состав СЗБ входят головной обтекатель (ГО) и переходной отсек (ПхО). Для запусков КА с помощью РН Союз-2 в составе СЗБ планируется использование штатного ГО 11С529, массой 1050 кг и штатного ПхО массой 220 кг.   Вместе с тем, в случае выведения КА с помощью РН Союз-2 (этапа разработки 1б) в составе СЗБ может использоваться унифицированный ГО 14С74 массой 2100 кг и ПхО массой 350 кг.



What this tells us that is that during development of Soyuz 2-1b, there were versions of the payload fairing and transfer compartment that were much heavier than the standard units. Perhaps these were heavier due to requirements to maintain drop zones for the rocket consistent with Soyuz-U.
« Last Edit: 03/11/2016 04:30 PM by Danderman »

Offline Danderman

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Re: Soyuz Q & A
« Reply #59 on: 03/11/2016 08:08 PM »
The whole interstage (a/k/a transfer compartment) issue is new to me; apparently, the interstage is the responsibility of either the payload provider or the upper stage provider. So, RSC Energia seems to provide the transfer compartment for Progress and Soyuz, whereas Lavochkin handles the interstage for launches using Fregat, and TsSKB for launches using their payloads.

It would be interesting to see the index numbers for the interstages, and also if there are any other providers besides those mentioned above.


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