They recovered four, three of them AT the crash sites! How. The black boxes didn't even survive. cat-confused

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[–] [S] 15 points 2 years ago (9 children)
  • [–] 19 points 2 years ago* (8 children)

    Jet fuel doesn't melt steel beams. But metal loses it's strength while retaining its solid phase as it is heated. https://www.engineeringtoolbox.com/metal-temperature-strength-d_1353.html

    This is the issue with laypeople speculating on complex engineering failures. The mechanisms of action that one might intuit from looking at a complex systems failure and the ones that actually cause it are oftentimes not related to or even opposite.

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  • [–] [S] 6 points 2 years ago (5 children)

    Does that link talk about the explosions in the basement?

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  • [–] 15 points 2 years ago (2 children)

    Hey, you know the deal, no investigation, no right to speak. The link doesn't talk about 9/11 at all, it talks about changes in metal strength at different temperatures.

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  • [–] 4 points 2 years ago (1 child)

    My favorite comment on this was a blacksmith heating a steel bar to a few hundred degrees and then pushing it around with his pinky. Also, the sheer number of people who don't have any conception of what a blast furnace is or how it works, how oxygen and fire interact. Idk, I always thought the "jet fuel can't melt steel beams" thing was absurd on it's face. It's such a silly premise. I've forged metal on backyard wood fires, you just need to set the airflow up to get incredibly hot fires.

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