Author Topic: Soviet/Russian space programs Q&A  (Read 587084 times)

Offline Stan Black

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Offline TJL

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Re: Soviet/Russian space programs Q&A
« Reply #441 on: 07/01/2010 01:45 am »
Is the thrust generated by a Soyuz launch vehicle the same when launching a manned Soyuz spacecraft as opposed to an unmanned Progress?
Thank you.

Offline Prof68

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Re: Soviet/Russian space programs Q&A
« Reply #442 on: 07/03/2010 07:29 pm »
Is the thrust generated by a Soyuz launch vehicle the same when launching a manned Soyuz spacecraft as opposed to an unmanned Progress?
Thank you.

Last 9 years sligthly different versions of Soyuz launcher are used for Soyuz and Progress launches
Soyuz-FG (used for launch of Soyuz capsules*) use 4xRD-107A & 1xRD-108A engines
Soyuz-U (used for launch of Progress) use 4xRD-107 & 1xRD-108 engines

*and three Progress in 2001-2002 - there were qualification flights of Soyuz-FG.

Soyuz-FG engines have a little bigger thrust (except vac trust of RD-108A) and higher specific impulse:

Engine modifications      RD-107   RD-108   RD-107A    RD-108A
Thrust                  , SL/vac, tf   83/102   76/96   85,6/104     80,8/94
Specific impulse, SL/vac, sec   256/313   248/315   263,3/320,2 257,7/320,6
 
So, combined trust of Soyuz-U at sea level is 83*4+76=408 tf
and combined trust of Soyuz-FG is 85.6*4+80.8=423.2 tf, 3.7% higher
« Last Edit: 07/03/2010 07:39 pm by Prof68 »

Offline TJL

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Re: Soviet/Russian space programs Q&A
« Reply #443 on: 07/03/2010 11:47 pm »
Prof68...thanks very much for the very detailed information!

Offline Nicolas PILLET

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Re: Soviet/Russian space programs Q&A
« Reply #444 on: 07/04/2010 10:02 pm »
I've just "discovered" something and I would like your opinion...

If you watch some archive videos, you will see that Soyuz and Progress spacecrafts don't track the same target when they dock on a station module. For example, on Zvezda, the B&W cross shows nothing special at the moment of capture for a Soyuz. The target is only used for Progress dockings.

I think this is because Progress spacecrafts are NOT fitted with external front TV cameras. The camera used for Progress dockings is located in place of the Soyuz's periscope.

So, the view angle is not the same for a Progress and a Soyuz, which explains the different target !
Nicolas PILLET
Kosmonavtika : The French site on Russian Space

Offline Danderman

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Re: Soviet/Russian space programs Q&A
« Reply #445 on: 07/05/2010 03:04 am »
Is the thrust generated by a Soyuz launch vehicle the same when launching a manned Soyuz spacecraft as opposed to an unmanned Progress?
Thank you.
No, because different variants of the Soyuz are used for the 2 different spacecraft.

Offline Danderman

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Re: Soviet/Russian space programs Q&A
« Reply #446 on: 07/05/2010 03:08 am »
I've just "discovered" something and I would like your opinion...

If you watch some archive videos, you will see that Soyuz and Progress spacecrafts don't track the same target when they dock on a station module. For example, on Zvezda, the B&W cross shows nothing special at the moment of capture for a Soyuz. The target is only used for Progress dockings.

I think this is because Progress spacecrafts are NOT fitted with external front TV cameras. The camera used for Progress dockings is located in place of the Soyuz's periscope.

So, the view angle is not the same for a Progress and a Soyuz, which explains the different target !

If you look at this page:

http://forum.nasaspaceflight.com/index.php?topic=19728.210

you will see that at least one Soyuz mission used the standard target.

Offline steveS

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Re: Soviet/Russian space programs Q&A
« Reply #447 on: 07/05/2010 05:09 am »
The Soyuz with three full grown humans looks very cramped inside (as seen on launch footage). I wonder how they live for two days inside the spacecraft until it is docked with the ISS. Can some one explain how the crew are performing their day to day work (including hygiene breaks) inside such a small habitable volume for two days?

Offline Jorge

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Re: Soviet/Russian space programs Q&A
« Reply #448 on: 07/05/2010 05:14 am »
The Soyuz with three full grown humans looks very cramped inside (as seen on launch footage).

The launch footage is from a camera in the descent module.

Quote
I wonder how they live for two days inside the spacecraft until it is docked with the ISS. Can some one explain how the crew are performing their day to day work (including hygiene breaks) inside such a small habitable volume for two days?

They don't. They open up the hatch, and spread out into the orbital module, which has more habitable volume.

What you see on the launch footage isn't everything, you know.
JRF

Offline Nicolas PILLET

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Re: Soviet/Russian space programs Q&A
« Reply #449 on: 07/29/2010 10:44 pm »
Does anyone know the 11S861 DM-2 serial numbers used to launch:-
Kosmos-234514th August 1997 : n88L
Globus-1 15L28th February 1999 : n84L
GLONASS13th October 2000 : n91L

Data are from Energuia's big book (1996-2001 history).
Nicolas PILLET
Kosmonavtika : The French site on Russian Space

Offline Downix

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Re: Soviet/Russian space programs Q&A
« Reply #450 on: 07/30/2010 11:56 pm »
The Soyuz with three full grown humans looks very cramped inside (as seen on launch footage). I wonder how they live for two days inside the spacecraft until it is docked with the ISS. Can some one explain how the crew are performing their day to day work (including hygiene breaks) inside such a small habitable volume for two days?
As explained above, the launch section is just that, the launch/landing segment.  There is an Orbital Module, where they actually live once in space.  Here's a diagram which shows this better, and gives you an idea how much actual space there is inside of a Soyuz.  (It's actually pretty roomy so I understand)
chuck - Toilet paper has no real value? Try living with 5 other adults for 6 months in a can with no toilet paper. Man oh man. Toilet paper would be worth it's weight in gold!

Offline Stan Black

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Re: Soviet/Russian space programs Q&A
« Reply #451 on: 08/01/2010 07:28 pm »
Anyone know the serial numbers of the last four Soyuz rockets delivered to Baikonur?

18-05-2010 Soyuz-U for Progress M-07M and a Soyuz-FG
http://www.federalspace.ru/main.php?id=2&nid=10715

24-07-2010 Soyuz-U for Progress M-08M and a Soyuz-FG for Soyuz TMA-20
http://www.federalspace.ru/main.php?id=2&nid=11790

Please, thank you etc.

Offline anik

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Re: Soviet/Russian space programs Q&A
« Reply #452 on: 08/02/2010 01:37 pm »
18-05-2010 Soyuz-U for Progress M-07M and a Soyuz-FG

122 and 035.

24-07-2010 Soyuz-U for Progress M-08M and a Soyuz-FG for Soyuz TMA-20

123 and 034.

Offline Stan Black

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Re: Soviet/Russian space programs Q&A
« Reply #453 on: 08/02/2010 02:38 pm »
18-05-2010 Soyuz-U for Progress M-07M and a Soyuz-FG

122 and 035.

24-07-2010 Soyuz-U for Progress M-08M and a Soyuz-FG for Soyuz TMA-20

123 and 034.

Once again thank you!

Offline Danderman

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Re: Soviet/Russian space programs Q&A
« Reply #454 on: 08/02/2010 03:42 pm »
As explained above, the launch section is just that, the launch/landing segment.  There is an Orbital Module, where they actually live once in space.  Here's a diagram which shows this better, and gives you an idea how much actual space there is inside of a Soyuz.  (It's actually pretty roomy so I understand)

A company I once worked for had a staff meeting inside a Soyuz. It was a small company, but still ......

Offline Stan Black

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Re: Soviet/Russian space programs Q&A
« Reply #455 on: 08/07/2010 04:12 pm »
Ekspress-AM44 and Ekspress-MD1 together amounted to 3,700 kilogrammes and were taken directly to geosynchronous orbit; by a Phase III Proton-M with enhanced Briz-M using a 48-degree initial orbit. A Phase III Proton is quoted as being able to lift 6,15 metric ton to geosynchronous transfer orbit.

Ekspress-AM8 and Ekspress-MD2 are the next pair.

However the 48-degree orbit is no longer available.

There is to be a Phase IV Proton and is quoted as being able to lift 6,3 metric ton to geosynchronous transfer orbit.

The Question
Do you think a Phase IV Proton-M heading to a 51,5-degree parking orbit can match the geosynchronous orbit capabilities of a Phase III Proton-M heading to 48-degree parking orbit?

Offline Danderman

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Re: Soviet/Russian space programs Q&A
« Reply #456 on: 08/07/2010 05:39 pm »
Perhaps, using a supersynchronous transfer orbit.

Offline Stan Black

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Re: Soviet/Russian space programs Q&A
« Reply #457 on: 08/08/2010 07:15 am »
Venera-9 and Venera-10 are oftened listed as having started from the same launch platform; even an older document I downloaded from Khrunichev website shows this.

But this appears to be in error; the quickest turn around of a Proton launch site according to Novosti Kosmonavtiki was 11 days in 2000 [source].

Proton rocket lists:-
http://www.kosmonavtika.com/lanceurs/proton/liste/liste-tous.html
http://space.skyrocket.de/doc_lau_fam/proton.htm
« Last Edit: 08/08/2010 10:31 am by Stan Black »

Offline anik

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Re: Soviet/Russian space programs Q&A
« Reply #458 on: 08/08/2010 07:37 am »
But this appears to be in error

Yes, Venera-9 was launched from 81/24, Venera-10 was launched from 81/23.

Offline QuantumG

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Re: Soviet/Russian space programs Q&A
« Reply #459 on: 08/08/2010 07:41 am »
The upcoming Nauka module to the ISS looks interesting.  I hear it is to have some new rat experiments, is there any details available of what precisely will be flying?

Thanks.
Human spaceflight is basically just LARPing now.

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