[FPSPACE] emergency return to airlock

[Jim Oberg]

On Apollo they also had a buddy system for supplying air
from one suit to another. Good point on this threat exposure.


----- Original Message ----- 
From: "Geert Sassen" <geert at navtools.nl>
To: "Chris Faranetta" <cfaranetta at spaceadventures.com>
Cc: <fpspace at friends-partners.org>
Sent: Friday, November 02, 2007 6:36 AM
Subject: Re: [FPSPACE] Critical spacewalk Saves of the Past


> Hubble repairs were certainly spectaculair and very ingenious, however 
> these were more or less planned long before the mission started, same 
> with the solar max. With the Skylab, Salyut, and Mir repairs, as well as 
> with the present ISS EVA we are talking about EVA's and repairs which 
> were not planned and (more or less) have to be improvised and designed 
> during the mission, which is a very difficult thing to do as you are 
> working with astronauts/cosmonauts who are asked to do something for 
> which they did not receive exact training before the mission.
> 
> In my opinion one of the most dangerous items is that Parazynski will be 
> very far away from the airlock, too far in fact to bring him back to 
> safety should his spacesuit fail (his emergency supply lasts only 30 
> minutes which will not be sufficient). I don't know whether there have 
> ever been EVA's where this safety-feature was waved away (even during 
> the moon-rover missions, they were always within 30 minutes driving of 
> the LM, only if both the rover and a PLSS failed they would have a big 
> problem), I have great faith in mission control and the guys planning 
> this repair but they certainly work very close to the edge...
> 
> 
> Chris Faranetta wrote:
>> What about Hubble repairs?
>>
>> CF
>>
>> -----Original Message-----
>> From: fpspace-bounces at friends-partners.org
>> [mailto:fpspace-bounces at friends-partners.org] On Behalf Of Geert Sassen
>> Sent: Thursday, November 01, 2007 5:59 PM
>> To: Jim Oberg
>> Cc: fpspace at friends-partners.org
>> Subject: Re: [FPSPACE] Critical spacewalk Saves of the Past
>>
>> Good day,
>>
>> I would add the repair of the Soyuz TM 9 thermal blankets by 
>> Solovyov/Balandin (the same spacewalk where they damaged the Kwant 2 
>> hatch and had to use the 2nd compartment as emergency airlock, almost 
>> depleting their Orlan suits). Should be worth a third place on your
>> list.
>>
>> The Mir/Kvant docking fouling spacewalk was more or less repeated early 
>> on in the ISS construction (with one of the Progress ships if I remember
>>
>> correctly?).
>>
>> The internal EVA on Mir after the Spektr de-pressurization might also
>> count?
>>
>> And, certainly, freeing the stuck KRT-10 10 mtr dish antenna from the 
>> aft dockingport of Salyut 6 by Lyakhov/Ryumin on Soyuz 34.
>>
>> Jim Oberg wrote:
>>   
>>> Critical spacewalk Saves of the Past
>>>
>>> If I were to compile a list of critical
>>> 'spacewalk saves' of the past, to see how this
>>> array repair rates, I'd include:
>>>
>>> 1973 -- Skylab solar wing deploy
>>>
>>> 1984 -- Salyut-7 propulsions system re-routing
>>>
>>> 1987 -- Mir/Kvant docking fouling
>>>
>>> 1991 -- Three-person satellite grab on third try...
>>>
>>> What other such events should rate as high, or higher?
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>>>
>>>   
>>>     
>>
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>>   
> 
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