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#340
by
Mark Dave
on 10 Sep, 2006 19:18
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Say what was that black line on the LO2 feed line of the STS-115 ET? I never saw that before on the two recent launches of Discovery.
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#341
by
Oli4
on 11 Sep, 2006 17:48
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Hi guys! First of all I've got to say I love this site! So much info to absorb... Anyway I've got some questions about ISS and the Shuttle, so here goes.
I know ISS has CO2 scrubbers. But does the Shuttle also has a system like that? And how the O2 flow is managed inside ISS and the Shuttle?
Is there a sort of airconditioning system aboard the Shuttle? I was wondering what the temperature is inside ISS and the Shuttle? And what systems aboard are used to keep the temperature constant. Or does the temp varies at night to save energy?
O and on another issue (the gap filler). Where is the port umbilical door located? And what systems are behind it?
Thanks for answering
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#342
by
spaceshuttle
on 11 Sep, 2006 19:37
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MarkD - 10/9/2006 2:05 PM
Say what was that black line on the LO2 feed line of the STS-115 ET? I never saw that before on the two recent launches of Discovery.
probably some random markings put on there...
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#343
by
spaceshuttle
on 11 Sep, 2006 19:44
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oakjon - 9/9/2006 2:08 PM
Questions from a simple mind.
In some camera views it looked like "rings" in the SSME exhaust path. How come it looks like they "pulse"?
Jon
yeah, as mentioned above, it's the shockwave (the definition of the shockwaves differ from launch to launch, but can't be seen on night launches because of the brightness of the flame) which is the ripple/pulsing you probably saw, and then the diamonds are a final result.
attachments: shockwave, then diamonds.
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#344
by
Chris Bergin
on 13 Sep, 2006 00:01
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Jim - 13/9/2006 12:36 AM
emarkay - 12/9/2006 6:41 PM
ET re-entry:
Has anyone ever filmed it?
On early missions "Freon" was used as a blowing agent for the insulating foam. How much damage to the Ozone Layer was caused by vaporizing this chloroflourocarbon agent in the realm of the Ozone?
What is the blowing agent now, and what is it's potential hazard to the upper atmosphere?
yes
Unquanitifiable
No hazard
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#345
by
emarkay
on 13 Sep, 2006 01:31
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Chris Bergin - 12/9/2006 6:48 PM
Jim - 13/9/2006 12:36 AM
emarkay - 12/9/2006 6:41 PM
ET re-entry:
Has anyone ever filmed it?
On early missions "Freon" was used as a blowing agent for the insulating foam. How much damage to the Ozone Layer was caused by vaporizing this chloroflourocarbon agent in the realm of the Ozone?
What is the blowing agent now, and what is it's potential hazard to the upper atmosphere?
yes
Unquanitifiable
No hazard
Thanks.
Any links to ET re-entry videos?
Found link to old and new ET foam via CAIB report page 129:
"In an effort to reduce its use of chlorofluorocarbons (CFCs), NASA had switched from a CFC-11 (chlorofluorocarbon) blowing agent to an HCFC-141b blowing agent beginning with External Tank-85, which was assigned to STS-84. (The change in blowing agent affected only mechanically applied foam. Foam that is hand sprayed, such as on the bipod ramp, is still applied using CFC-11.)"
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#346
by
Chris Bergin
on 13 Sep, 2006 01:47
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I believe there is only one full re-entry video on a very early mission where one of the crew stood up through the whole re-entry and videod it. I don't think it's ever seen light of day.
The only thing that comes near is something we worked real hard to get hold of for L2 - and we got four. STS-81, 86, 78, 94 Re-entry videos plus flight deck audio, and two STA landing videos.
Those STS re-entry videos are totally stunning, not just for the view on the way in, but the chatter in the flight deck is interesting (and funny in some). The videos are from the HUDs (Heads Up Display) Flight Deck camera, from something like 100,000 ft up (could be more, the HUD doesn't come up until a few minutes later)....but what a view leaving space and the stars!
Screenshot:
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#347
by
shuttlefan
on 13 Sep, 2006 02:11
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Did NASA ever give any thought to actually trying to fly any of the abort modes to prove they would work in a real emergency?
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#348
by
Mark Max Q
on 13 Sep, 2006 02:13
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Those re-entry videos on L2 are fantastic.
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#349
by
emarkay
on 13 Sep, 2006 02:17
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I was asking about ET re-entry.
I recall a few monochrome stills taken over India ( I think), but no motion pictures, Curious as to the color of the plasma and if there's any "exploding" water vapor as the tanks rupture.
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#350
by
Chris Bergin
on 13 Sep, 2006 02:20
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You can tell it's been a long day when I can't read
There are photos from the ground, none from space. Try using the search function as that might help locate them on here...pretty sure I've seen some. Nothing all that interesting though.
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#351
by
astrobrian
on 13 Sep, 2006 02:53
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I believe the "stand up" videographer was Story Musgrave. I will to watch A Space Story again to be sure but I think he mentions it in that
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#352
by
astrobrian
on 13 Sep, 2006 02:59
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There is only one video I know of that has the rupturing of the ET going back in, poor video quality though
emarkay check your email
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#353
by
Jim
on 13 Sep, 2006 11:26
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shuttlefan - 12/9/2006 9:58 PM
Did NASA ever give any thought to actually trying to fly any of the abort modes to prove they would work in a real emergency?
RTLS was a candidate for the first launch until they realized it was harder than an actual orbital flight
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#354
by
ianeck
on 14 Sep, 2006 01:23
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I have a question regarding the flight control team and flight controllers. What qualifies a flight controller to be a flight director? Does he or she need to have worked X number of missions at each of the FC positions (Fido, mmacs, etc?) or is it a series of exams they go through? Is it a measure of their quality of work in their previous flight control discipline? Or a mixture of all of the above?
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#355
by
astrobrian
on 14 Sep, 2006 02:07
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If you have L2, I think there was just such a document if you were "applying" for that job. Having no luck finding the link though. Anyone else able to help out?
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#356
by
DaveS
on 14 Sep, 2006 02:14
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#357
by
ianeck
on 14 Sep, 2006 03:34
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thanks DaveS and Astrobrian. I'm certainly in no position to consider applying, but it was a simple question of curiosity...thanks though :-)
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#358
by
oakjon
on 14 Sep, 2006 18:48
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RE: Questions from a simple mind. Finally got back to say thanks for the answers. Now another question. When they say they are going to sleep in 1 hr, or x-time, and the Iss crew goes to sleep 30 mins. earlier, or such, do they really go to sleep or lie there and "jaw around the campfire"?. Or do they just do normal people stuff like read or listen to music?
Jon (Simple Mind)
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#359
by
Jim
on 14 Sep, 2006 22:04
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up to the crew members
