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About the EVA

> By December, 2013, NASA had determined the leak to have been caused by a design flaw in the Portable Life Support System liquid coolant. The designers failed to take into account the physics of water in zero-g, which unintentionally allowed coolant water to mix with the air supply.

They did not take into account that a space suit will primarily be used in… space. wat?!?




>> The designers failed to take into account the physics of water in zero-g, which unintentionally allowed coolant water to mix with the air supply.

> They did not take into account that a space suit will primarily be used in… space. wat?!?

That's not entirely fair. It's easy enough to know that something will be used in particular circumstances, but not to realise all of the consequences. Water behaves very, very weirdly in microgravity as compared with here on Earth, and unless you, personally, have experienced it and experimented with it, it's very, very easy not to notice something, or to expect something other than what actually happens.


I went digging because I was confused about that too, from https://en.wikipedia.org/wiki/Luca_Parmitano#Expedition_36/3...

> Engineers found that contamination had clogged one of the suit's filters, causing water from the suit's cooling system to back up.

So one of the failure scenarios didn't behave well in zero gravity, I think that's (more) reasonable.




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