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#20
by
sivodave
on 09 Jun, 2010 12:02
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HI all.
I'm looking for any document explaining the contingency EVA necessary for manually closing the payload cargo bay door on the Shuttle. I've tried on the NASA Tech Server Report but nothing for the moment.
Any tip?
thanks in advance
Davide
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#21
by
AnalogMan
on 09 Jun, 2010 12:31
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I'm looking for any document explaining the contingency EVA necessary for manually closing the payload cargo bay door on the Shuttle.
Orbiter contingency EVA procedures can be found in Section 14 of the document below. However, for payload bay door closing better info can be found in the checklists in Section 15, specifically pages 15-9 thru 15-11.
EVA Checklist - Generic Rev H PCN-19 (Jan 8, 2010)http://www.nasa.gov/centers/johnson/pdf/438130main_EVA_G_H_19.pdf
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#22
by
alexw
on 09 Jun, 2010 19:32
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Orbiter contingency EVA procedures can be found in Section 14 of the document below. However, for payload bay door closing better info can be found in the checklists in Section 15, specifically pages 15-9 thru 15-11.
EVA Checklist - Generic Rev H PCN-19 (Jan 8, 2010)
http://www.nasa.gov/centers/johnson/pdf/438130main_EVA_G_H_19.pdf
The dry checklists conceal what must be a very scary scenario.
I especially liked the "96 bolt EVA"!! The steps between removing the last four bolts, opening the (temporary?) clamps, and the EVs declaring themselves clear and initiating the separation burn must be pretty tense.
-Alex
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#23
by
LostInSpace
on 10 Jun, 2010 18:58
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Did the STS-80 spacewalk attempt switch to battery power?
No, a switching of spacesuits to battery power in that spacewalk was planned after an opening of hatch, which was not performed.
Speaking of, what is the average or peak power that the spacesuit batteries provide?
Also, what capacity (Watt-hours)?
This is the info I have:
Extra-Vehicular Mobility Unit
EMU battery operates at 16.8 V
Capacity = 26.6 A-hr
Produces ~64 W of power (average)
Useful power supplied for ~7 hours @ 3.8 A
(These silver-zinc batteries have limited 170-day life once activated, with only 6 on-orbit charge/discharge cycles normally allowed - capacity drops with each cycle.)
The current EMU batteries have a minimum 32.0 A-hr capacity.
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#24
by
mikes
on 27 May, 2011 13:27
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Must be something to finish a 7.5 hour EVA and have to hold your arms up for over 10 minutes when you get back in.
That raises some interesting questions. In free-fall, the only forces are the astro's muscles and the tensioning in the suit.
How different is the "neutral" arm position when there's no pressure differential versus outdoors in vacuum?
Do the EMUs have a mechanism for changing the neutral position?
How much force does the astro have to apply for "arms up" once they're indoors?
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#25
by
JayP
on 27 May, 2011 16:15
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Does anyone know of any good sources for information about the design and development of the EMU? There is plenty of information aboult the Apollo suits, but not much on how they got from the AL-7B to the EMU.
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#26
by
brahmanknight
on 03 May, 2013 20:35
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In an emergency, how quickly can the US EMUs be donned for an EVA?
I remember when the pump module failed a few years back, the crew was already in the midst of preparing for a scheduled EVA
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#27
by
manboy
on 04 May, 2013 00:06
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Does anyone know of any good sources for information about the design and development of the EMU? There is plenty of information aboult the Apollo suits, but not much on how they got from the AL-7B to the EMU.
I own both of the below books and they contain plenty of information on the Shuttle EMU development. I own the 2006 edition of 'U.S. Spacesuits' and I do know they got the dates wrong for LES/ACES, I'm unsure if there are any other inaccuracies.
U.S. Space Gear : Outfitting The Astronaut (1994) by Lillian KozloskiU. S. Spacesuits (
2006/
2012) by Kenneth S. Thomas and Harold J. McMann.
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#28
by
AnalogMan
on 04 May, 2013 00:20
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Does anyone know of any good sources for information about the design and development of the EMU? There is plenty of information aboult the Apollo suits, but not much on how they got from the AL-7B to the EMU.
This report may be of interest:
ILC Space Suits & Related Products - Report 0000-712731 Rev A - November 28, 2007 171 pages
http://www.hq.nasa.gov/alsj/ILC-SpaceSuits-RevA.pdf
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#29
by
erioladastra
on 10 May, 2013 17:26
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In an emergency, how quickly can the US EMUs be donned for an EVA?
I remember when the pump module failed a few years back, the crew was already in the midst of preparing for a scheduled EVA
Monitor the EVA 21 thread in the ISS section and we will all find out the answer.
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#30
by
Kasponaut
on 11 May, 2013 12:41
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I have search for a long time to find a list of only US spacewalks - not the grand total on wikipedia - but the US total list and/or number of EVAs? Anybody?
Kasper
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#31
by
anik
on 11 May, 2013 12:45
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357 official EVAs in the world: 134 EVAs in Russian spacesuits, 222 EVAs in U.S. spacesuits, 1 EVA in Chinese spacesuits.
My list of all EVAs (in Russian): see attachment.
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#32
by
Kasponaut
on 13 Jul, 2013 14:32
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357 official EVAs in the world: 134 EVAs in Russian spacesuits, 222 EVAs in U.S. spacesuits, 1 EVA in Chinese spacesuits.
My list of all EVAs (in Russian): see attachment.
Thank you!!!
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#33
by
carmelo
on 05 Oct, 2013 03:47
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Theoretically the Russian Sokol suit can performing a short contingecy EVA?
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#34
by
Danderman
on 05 Oct, 2013 05:34
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You wouldn't get very far. Sokol requires connection to a ship's ECLSS, or else it will overheat, and CO2 buildup will commence.
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#35
by
obi-wan
on 09 Oct, 2013 14:42
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Well, in fairness, you're saying it needs a life support system, which is true for any pressure garment.
A better answer would be: launch and entry suits, such as Sokol and ACES, are intended to keep the crew alive in the event of a pressure failure long enough to do an emergency deorbit. They are designed to provide a minimum level of arm and hand mobility to allow them to actuate flight and vehicle system controls. They are not worn with liquid cooling garments, so you would overheat quickly in EVA. If it were a life and death, desperation need to go EVA and that's all you had, they would probably give it a try, but only if every other option had first been exhausted.
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#36
by
Jim
on 09 Oct, 2013 16:27
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Well, in fairness, you're saying it needs a life support system, which is true for any pressure garment.
A better answer would be: launch and entry suits, such as Sokol and ACES, are intended to keep the crew alive in the event of a pressure failure long enough to do an emergency deorbit. They are designed to provide a minimum level of arm and hand mobility to allow them to actuate flight and vehicle system controls. They are not worn with liquid cooling garments, so you would overheat quickly in EVA. If it were a life and death, desperation need to go EVA and that's all you had, they would probably give it a try, but only if every other option had first been exhausted.
No, they don't even have umbilicals to allow them to leave the cabin, much less a life support system
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#37
by
temoana
on 25 Nov, 2013 15:25
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Good afternoon everyone !
I am a french student, actually making a presentation about the space suit.
Fortunatly, I found this website, and I thought of posting my question here.
I'd like to know if you guys have some more informations about the space suit such as :
-How will we be able to breathe when using it ?
-How will the pressure system work ?
-What are the differences between the PLSS and the OPS in the pressure suit ?
It may seems pretty easy for some of you but I'd be very happy if I get the answers.
I am interested in every pieces of information concerning the space suit
I also need technical details please !
Thank you in advance
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#38
by
manboy
on 27 Nov, 2013 03:24
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Good afternoon everyone !
I am a french student, actually making a presentation about the space suit.
Fortunatly, I found this website, and I thought of posting my question here.
I'd like to know if you guys have some more informations about the space suit such as :
-How will we be able to breathe when using it ?
-How will the pressure system work ?
-What are the differences between the PLSS and the OPS in the pressure suit ?
It may seems pretty easy for some of you but I'd be very happy if I get the answers.
I am interested in every pieces of information concerning the space suit
I also need technical details please !
Thank you in advance
Which space suit?
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#39
by
temoana
on 16 Dec, 2013 14:13
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Hello everybody,
I am actually looking for some information on the space suits:
As I am studying the breathing system, I would be glad to have some more knowledge on this.
I know there are different space suits depending on the country, however I don't know if the breathing system is different. If so, I would be happy to know these differences.
Every pieces of advice you got will really help me.
I also need details such as formulas:
(for example : 2(LiOH, H2O) + CO2 ---> LiCo3 + 3H2O)
Any websites about this are welcomed.
What in your opinion could make this breathing system better?
Do you have any ideas on the possible future improvements?
Still concerning the space suit equipments, I needed some information about the pressure system.
First of all, I dont really know if it works the same way for the different space suits.
The pressure in the space suit is lower than on Earth, is there a consequence on the human using it?
How does it work, how is it possible to lower the pressure in the space suit?
If you have any more information about pressure, such as pressure in space compared to pressure on Earth, or just interesting websites
that will be really helpful
Thanks !
(Please forgive the mistakes I made as English isn't my first language)
