Another angle:

    • Krauerking@lemy.lol
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      19 hours ago

      I mean the modern skyscraper is definitely built very different these days.
      The world trade center used hollow exterior support so they could avoid having support columns interrupting the floor plans and large central support columns but you can see what happens when the exterior support gets damaged and heat causes sag from the weight.

      Advanced techniques usually mean less material and faster build times.
      You know what was even more solid? A huge pile of rocks in the shape of a pyramid.

        • booly@sh.itjust.works
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          9 hours ago

          40x the kinetic energy. Now consider the chemical energy stored in sufficient fuel for a coast to coast flight of that weight and speed.

        • funkless_eck@sh.itjust.works
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          18 hours ago

          rough approximation, but I did double check the numbers.

          ie we don’t know the exact weight of the bomber, but that’s its average laden weight, could be lighter without bombs

          in 2001 the second plane hit faster than the first and I believe the first is guessed from footage but the second is from the black box?

      • wildcardology@lemmy.world
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        13 hours ago

        Those bombers back in the day needs to be made of lighter materials so they could carry those bombs and ammos for the . 30 machine guns.

    • prole@lemmy.blahaj.zone
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      19 hours ago

      Different/less fuel I imagine. The problem with WTC was the fires kept burning which weakened the steel enough for it to collapse under its own weight.

      Edit: Admittedly, I read the headline as “B-52” but I think the comment stands.

      • funkless_eck@sh.itjust.works
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        17 hours ago

        yes the B 25 actually lost its engines in the impact that caused two other separate sites with respective fires