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Astronauts told to return to ISS after sheltering over air leak repairs

bbc.com

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Re: Astronauts told to return to ISS after sheltering over air leak repairs

#231
post #217
post #135

Earlier quoted context omitted.

They did use space tape (Kapton) and epoxy for that weird case with the hole drilled in the ISS.

The same kapton tape used in electronics? Never heard it called space tape.

It was invented for NASA

Re: Astronauts told to return to ISS after sheltering over air leak repairs

#232
post #16

Maybe someone who knows more about the ISS than I do can answer this: Naively, I would assume that there are airlocks between the different sections of the ISS. I would also assume that they would close these airlocks while doing the kind of work they are doing to repair the leaks. So, assuming I'm right (and my assumptions might be wrong,) why do the astronauts need to shelter?

There aren’t even doors between sections. Airlocks are serious things, there is one or two for station for EVA. There are multiple hatches for docking spacecraft. One of the innovations of ISS is larger docking adapter with bulkhead that is removed after docking. Russian section still uses hatches. All of the cables go through the docking adapter or hatch which makes impossible to close door or quickly disconnect.

There are doors (called hatches) between the segments. Each segment flew up separately and pressurized. So there are actually two hatches between each segment, since there’s one on each.

Re: Astronauts told to return to ISS after sheltering over air leak repairs

#233
post #205

Earlier quoted context omitted.

It's an almost 30 year old nearly 500 ton structure subjected to radiation, bombardment by starstuff and debris, the stresses of docking and undocking, of boosts, and of constant heating and cooling as it passes in and out of the sun. Getting a clear picture of the comings and going of gasses is probably not easy.

Are there things that happen on board that increase the pressure - eg fermentation whether it’s experiment or in humans?

Humans can ferment?

Re: Astronauts told to return to ISS after sheltering over air leak repairs

#234

Earlier quoted context omitted.

There aren’t even doors between sections. Airlocks are serious things, there is one or two for station for EVA. There are multiple hatches for docking spacecraft. One of the innovations of ISS is larger docking adapter with bulkhead that is removed after docking. Russian section still uses hatches. All of the cables go through the docking adapter or hatch which makes impossible to close door or quickly disconnect.

There are doors (called hatches) between the segments. Each segment flew up separately and pressurized. So there are actually two hatches between each segment, since there’s one on each.

[deleted]

Re: Astronauts told to return to ISS after sheltering over air leak repairs

#235

Earlier quoted context omitted.

But they still haven't located the leak. My blob of glue idea solves that by automatically permeating into the cracks. wait, do they have to have matched CTE and k to the existing material... hmm

Do you know what causes superglue to harden? Do you think that will be found in a vacuum?

ok, droplets of UV-curing resin first, then CA glue, then water.

Re: Astronauts told to return to ISS after sheltering over air leak repairs

#237
post #192
post #159

I found this interesting: NASA RELL (Robotic External Leak Detector) [1]. "NASA’s Robotic External Leak Locator (RELL) is a robotic, remote-controlled tool that helps mission operators detect the location of an external leak and rapidly confirm a successful repair. … Two instruments working in sync give RELL its ammonia-detecting superpowers. … Mass spectrometer & Ion vacuum pressure gauge" [1] (PDF fact sheet from N…

I’m imagining the robots from Silent Running 1972.

...or the scutters on Red Dwarf.

Re: Astronauts told to return to ISS after sheltering over air leak repairs

#238
post #173

Earlier quoted context omitted.

Why did you feel the need to post this comment?

[flagged]

> Because he suffers from MDS and as such can not but complain endlessly about anything which Musk has started. It is an unfortunate affliction for which the only cure seems to be extraction from whatever environment the sufferer inhabits and removal to another environment where there are no other sufferers, then slowly acclimatising to this new environment until the sufferer is again able to consider the person causing the derangement objectively.

Pot, meet kettle. It sounds like both of you should go outside and touch some grass.

Re: Astronauts told to return to ISS after sheltering over air leak repairs

#239
post #205
post #124

> After multiple inspections and sealant applications, Nasa reported in January that pressure readings suggested a stable configuration had been reached - though there remained uncertainty about whether the leak had truly been sealed or whether air was simply escaping elsewhere. I'm clearly not understanding what they're trying to say here. If _one_ leak was sealed, but the air was "escaping elsewhere", it would stil…

It's an almost 30 year old nearly 500 ton structure subjected to radiation, bombardment by starstuff and debris, the stresses of docking and undocking, of boosts, and of constant heating and cooling as it passes in and out of the sun. Getting a clear picture of the comings and going of gasses is probably not easy.

Also in 2021, Nauka (the cursed Russian module) arrived on the station, and accidentally fired thrusters while attached, fighting against the attitude control of the station, flipping it around 540 degrees and putting a lot of stress that the station wasn't designed for on all the structural parts.

Re: Astronauts told to return to ISS after sheltering over air leak repairs

#240
post #192
post #159

I found this interesting: NASA RELL (Robotic External Leak Detector) [1]. "NASA’s Robotic External Leak Locator (RELL) is a robotic, remote-controlled tool that helps mission operators detect the location of an external leak and rapidly confirm a successful repair. … Two instruments working in sync give RELL its ammonia-detecting superpowers. … Mass spectrometer & Ion vacuum pressure gauge" [1] (PDF fact sheet from N…

I’m imagining the robots from Silent Running 1972.

I’m imagining a pool snail
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