this post was submitted on 04 Aug 2025
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xkcd #3124: Grounded

Title text:

We should have you at the gate in just under two hours--two and a half if we get pulled over.

Transcript:

Transcript will show once it’s been added to explainxkcd.com

Source: https://xkcd.com/3124/

explainxkcd for #3124

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[–] dandelion@lemmy.blahaj.zone 30 points 1 week ago (25 children)

why was it cold, because they couldn't maintain an internal cabin atmosphere, including temperature?

Also, I had to look it up, but just wanted to confirm 7000 feet is much lower than typical 737 cruising altitude, which is usually 30,000 - 40,000 feet.

7000 feet is still pretty high and around where oxygen saturation decreases - could you tell any effect? I just assume they were able to still oxygenate the cabin even if they couldn't go as high 🤷‍♀️

[–] genuineparts 30 points 1 week ago (3 children)

why was it cold, because they couldn’t maintain an internal cabin atmosphere, including temperature?

No pilot or Jet mechanic but afaik the pressurisation is happening with bleed air from the turbines that is then cooled down to comfortable levels. So there is no "heater" for the cabin so to speak as for a warmer cabin you just cool down the bleed air less. As such without pressurisation there is also no cabin heat.

[–] Empricorn@feddit.nl 5 points 1 week ago* (last edited 1 week ago) (2 children)

You just casually knew that offhand, and it's not even your industry??

[–] genuineparts 7 points 1 week ago

I am weirdly nerdy about planes. Always wanted to be a pilot as a kid.

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