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#440 by Stan Black on 22 Jun, 2010 19:50
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Some further sources of information about Briz-M
http://www.buran.ru/htm/gud%2033.htm
http://www.novosti-kosmonavtiki.ru/content/numbers/211/34.shtml
http://www.khrunichev.ru/main.php?id=49
http://www.khrunichev.ru/main.php?id=50 -
#441 by TJL on 01 Jul, 2010 01:45
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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. -
#442 by Prof68 on 03 Jul, 2010 19:29
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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 -
#443 by TJL on 03 Jul, 2010 23:47
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Prof68...thanks very much for the very detailed information!
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#444 by Nicolas PILLET on 04 Jul, 2010 22:02
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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 !
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#445 by Danderman on 05 Jul, 2010 03:04
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Is the thrust generated by a Soyuz launch vehicle the same when launching a manned Soyuz spacecraft as opposed to an unmanned Progress?
No, because different variants of the Soyuz are used for the 2 different spacecraft.
Thank you. -
#446 by Danderman on 05 Jul, 2010 03:08
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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.
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#447 by steveS on 05 Jul, 2010 05:09
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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?
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#448 by Jorge on 05 Jul, 2010 05:14
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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.QuoteI 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. -
#449 by Nicolas PILLET on 29 Jul, 2010 22:44
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Does anyone know the 11S861 DM-2 serial numbers used to launch:-
Kosmos-2345 14th August 1997 : n°88L Globus-1 15L 28th February 1999 : n°84L GLONASS 13th October 2000 : n°91L
Data are from Energuia's big book (1996-2001 history). -
#450 by Downix on 30 Jul, 2010 23:56
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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)
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#451 by Stan Black on 01 Aug, 2010 19:28
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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. -
#452 by anik on 02 Aug, 2010 13:37
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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. -
#453 by Stan Black on 02 Aug, 2010 14:38
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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! -
#454 by Danderman on 02 Aug, 2010 15:42
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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 ...... -
#455 by Stan Black on 07 Aug, 2010 16:12
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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? -
#456 by Danderman on 07 Aug, 2010 17:39
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Perhaps, using a supersynchronous transfer orbit.
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#457 by anik on 08 Aug, 2010 07:37
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But this appears to be in error
Yes, Venera-9 was launched from 81/24, Venera-10 was launched from 81/23. -
#458 by QuantumG on 08 Aug, 2010 07:41
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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.
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#459 by Nicolas PILLET on 11 Aug, 2010 10:49
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Yes, Venera-9 was launched from 81/24, Venera-10 was launched from 81/23.
Thank you anik and Stan, I've updated my list.