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#340
by
aquarius
on 03 Sep, 2009 19:32
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Did the Mir space station ever perform DAM and did the Russians track debris as closely as NASA does?
Thanks.
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#341
by
Nicolas PILLET
on 09 Sep, 2009 15:28
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Someone know how the blocks B/V/G/D of the Soyuz launchers are linked to the four arms of the launch pad ? And how the separation is physically made a the moment of liftoff ?
Thank you !
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#342
by
Jim
on 09 Sep, 2009 15:35
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Someone know how the blocks B/V/G/D of the Soyuz launchers are linked to the four arms of the launch pad ? And how the separation is physically made a the moment of liftoff ?
Thank you !
I believe it is not blocks B/V/G/D but block A
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#343
by
Nicolas PILLET
on 09 Sep, 2009 17:40
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I believe it is not blocks B/V/G/D but block A
I don't think so. As far as I understand, the four lateral are attached to the block A only with their upper cone. During the ascent, they "push" the rest of the launcher upward.
If the blocks B/V/G/D/ stop their engines during the ascent, they simply fall on the ground.
So, on the pad, if the launcher was sustained through the Block A, the lateral blocks would fall !
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#344
by
Jim
on 09 Sep, 2009 18:30
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I believe it is not blocks B/V/G/D but block A
I don't think so. As far as I understand, the four lateral are attached to the block A only with their upper cone. During the ascent, they "push" the rest of the launcher upward.
If the blocks B/V/G/D/ stop their engines during the ascent, they simply fall on the ground.
So, on the pad, if the launcher was sustained through the Block A, the lateral blocks would fall !
They would fall off before then, when the vehicle is erected on transporter.
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#345
by
Nicolas PILLET
on 09 Sep, 2009 18:33
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No, because they are not fueled at this moment, and there is a system to sustain the dry mass of the blocks.
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#346
by
anik
on 11 Sep, 2009 13:30
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Did the Mir space station ever perform DAM?
Never.
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#347
by
Danderman
on 19 Sep, 2009 14:35
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#348
by
Zpoxy
on 01 Oct, 2009 02:07
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I asked this once before with no response. Maybe yesterday's Soyuz launch will jog someone's memory.
I've noticed the two umbilical towers that drop away in the last minute of the countdown. Do they have the capability to re-mate automatically should there be some kind of on pad abort? Does Soyuz even have abort modes on the pad? I would think there would need to be some way to vent or drain the LOx tank in the upper stage if the vehicle doesn't launch.
Thanks in advance.
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#349
by
buran.fr
on 01 Oct, 2009 20:56
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Concerning the Moscow Aviation Institute (MAI) musuem, I found this web page with lots of photos:
http://www.buran-energia.com/blog/mai-museum/
The question is: is this museum now open to the public?
Unfortunatly this "museum" is not open to the public, and it's a shame, because there is really many interesting pieces there.
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#350
by
nathan.moeller
on 01 Oct, 2009 21:19
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I asked this once before with no response. Maybe yesterday's Soyuz launch will jog someone's memory.
I've noticed the two umbilical towers that drop away in the last minute of the countdown. Do they have the capability to re-mate automatically should there be some kind of on pad abort? Does Soyuz even have abort modes on the pad? I would think there would need to be some way to vent or drain the LOx tank in the upper stage if the vehicle doesn't launch.
Thanks in advance.
Soyuz has a Launch Abort System (LAS) similar to that of Apollo and now Orion. The crew can be launched away from the rocket inside their capsule if something goes wrong and land a few miles away. Although I cannot remember the flight as this moment, they had to do this once in 1983 when fuel lines ruptured, creating a blaze that consumed the booster. They were launched away from the pad just seconds before the rocket exploded beneath them and parachuted to safety a few minutes later.
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#351
by
William Barton
on 01 Oct, 2009 21:28
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I asked this once before with no response. Maybe yesterday's Soyuz launch will jog someone's memory.
I've noticed the two umbilical towers that drop away in the last minute of the countdown. Do they have the capability to re-mate automatically should there be some kind of on pad abort? Does Soyuz even have abort modes on the pad? I would think there would need to be some way to vent or drain the LOx tank in the upper stage if the vehicle doesn't launch.
Thanks in advance.
Soyuz has a Launch Abort System (LAS) similar to that of Apollo and now Orion. The crew can be launched away from the rocket inside their capsule if something goes wrong and land a few miles away. Although I cannot remember the flight as this moment, they had to do this once in 1983 when fuel lines ruptured, creating a blaze that consumed the booster. They were launched away from the pad just seconds before the rocket exploded beneath them and parachuted to safety a few minutes later.
I mentioned this in another thread, and it appears that was Soyuz T-10a.
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#352
by
Zpoxy
on 02 Oct, 2009 01:32
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I asked this once before with no response. Maybe yesterday's Soyuz launch will jog someone's memory.
I've noticed the two umbilical towers that drop away in the last minute of the countdown. Do they have the capability to re-mate automatically should there be some kind of on pad abort? Does Soyuz even have abort modes on the pad? I would think there would need to be some way to vent or drain the LOx tank in the upper stage if the vehicle doesn't launch.
Thanks in advance.
Soyuz has a Launch Abort System (LAS) similar to that of Apollo and now Orion. The crew can be launched away from the rocket inside their capsule if something goes wrong and land a few miles away. Although I cannot remember the flight as this moment, they had to do this once in 1983 when fuel lines ruptured, creating a blaze that consumed the booster. They were launched away from the pad just seconds before the rocket exploded beneath them and parachuted to safety a few minutes later.
Thanks, I know about the LAS. I guess my post made me sound like a newbie, I'm not. Been working in the shuttle program 30+ years. What I was asking about would be similar to a Shuttle RSLS abort. Is that even an option with Soyuz? Or do they just press on with a launch commit after the umbilicals retract. Seems to me you would need some way to safely vent and drain the LOx tanks should some type of abort occur. Can those umbilicals be remated remotely?
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#353
by
DiggyCoxwell
on 02 Oct, 2009 20:38
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Hi, Anik.
Thanks for this Q&A thread for Soviet-era space activities, etc.
Cpaseeba!
First, I am aware that in the early 1950's the Soviet rocket designer,
Sergei Korolev, and his chief rocket-motor expert, Valentin Glushko,
transitioned from alcohol-LOX for propellant to kerosene-LOX
for use in the failed R3 missile project.
My question is: What did both Glushko and Korolev have against
mixing ammonia with kerosene (or alcohol) to increasing the specific impulse of their rocket motors in those early years?
I recall reading that Glushko's 1.2 million Newton RD-110 rocket motors
kept blowing up or suffering burn through on the test stands between 1950-1953,
forcing the cancellation of the R3 missile project.
I am CONVINCED that if Glushko had used a mixture of kerosene
and ammonia for fuel on the rocket motor in question, he would have
solved the problems of cooling that large powerful rocket motor
before 1953.
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#354
by
Hungry4info3
on 03 Oct, 2009 07:36
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Quick question:
Why did Valeri Polyakov stay up on Mir for so long?
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#355
by
Jim
on 03 Oct, 2009 11:17
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I am CONVINCED that if Glushko had used a mixture of kerosene
and ammonia for fuel on the rocket motor in question, he would have
solved the problems of cooling that large powerful rocket motor
before 1953.
And that is based on what research or data? Use of uppercase doesn't provide any more credibility.
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#356
by
anik
on 03 Oct, 2009 11:30
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Why did Valeri Polyakov stay up on Mir for so long?
Valeriy Polyakov
said: "I had a target flight: it was required to prove basic medical and biologic possibility of flight of the person to Mars"
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#357
by
DiggyCoxwell
on 03 Oct, 2009 18:11
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I am CONVINCED that if Glushko had used a mixture of kerosene
and ammonia for fuel on the rocket motor in question, he would have
solved the problems of cooling that large powerful rocket motor
before 1953.
And that is based on what research or data? Use of uppercase doesn't provide any more credibility.
Ahhhh, you're the NASA engineer on this website, eh?
My question to you, Jim is: How much do you know about Valentin Glushko's work?
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#358
by
DiggyCoxwell
on 03 Oct, 2009 18:15
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Anik?
Tovarish!
Shto ti nee slishit ooo moeee slova?
Kakoee prroeblem?
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#359
by
anik
on 03 Oct, 2009 18:27
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Anik? Tovarish! Shto ti nee slishit ooo moeee slova? Kakoee prroeblem?
No problem at all, I saw your question, but unfortunately I can not answer to it, that is why I am silent.
