I flew for the first time on a plane last week and I’ve seen planes take off at the airport. It looks crazy. But being on one is totally different like holy shit. The thing just FLIES. It just… Soars… Through the sky! Like whoa man. Wtf… It’s crazy. With how much these things weigh, it’s insane to me the thing can just go up and bam, there we are, we’re flying now. Like wow… Dude crazy.

  • bitwaba@lemmy.world
    15·
    4 days ago

    You think that’s crazy? The ship that blocked the Suez Canal, the Ever Given, has a ship displacement (how much water is displaced when it sits in the ocean) of 265,000 Tons.

    That’s 240 million kilograms.

    And that shit just floats on fucking water maaaaan…

      • bitwaba@lemmy.world
        5·
        4 days ago

        There are tons of tons, believe it or not.

        There’s the short ton (2000lbs), long ton (2240 lbs), and tonne (1000kgs) which are all measure weight. However there’s also the shipping/freight/ocean ton which is a measure of volume (which is also different in the US and UK), and the register ton.

        However I did make a mistake. The wikipedia page I was reading said the weight in t and long tons. I made the mistake of assuming they meant short tons - in reality when measuring displacement for a ship, tonnes are used (which is pretty sensible, considering you’re displacing water and a liter of water to a kilogram of water have a pretty easy conversion formula formula…)

      • Belgdore@lemm.ee
        11·
        4 days ago

        Basically. The wings have to be able to bend that much so they don’t break off in strong winds or hard maneuvers.

      • SynopsisTantilize@lemm.ee
        8·
        4 days ago

        No, every once in a while the planes need to stretch out. They get tired from being so stiff. This helps their joints later in their life span.

  • passiveaggressivesonar@lemmy.world
    7·
    4 days ago

    Airplane engines have deceptively high thrust, imagine each one as a rocket and it’ll start to make sense. The a380 (the big double decker) each engine produces around 350KN. When that thrust is applied to an 80kg human they’ll experience almost 450Gs of force

    In an extreme sense, imagine putting a little rocket engine on a paper airplane which will represent a high thrust to weight ratio

    • AngryCommieKender@lemmy.world
      5·
      4 days ago

      Your last description is essentially the idea behind the F-117a. That thing isn’t wasn’t flying, it’s it was achieving escape velocity.

  • ramenshaman@lemmy.world
    8·
    4 days ago

    I’m a mechanical engineer and have a general understanding of how wings work. I’ve flown many times. That shit still feels like magic to me.

    • SkyJuice@lemmy.world
      5·
      4 days ago

      I was most impressed by the sheer amount of power those engines put out when you finally take off. The acceleration gave me a boost of adrenaline when I flew for the first time (it was a Southwest Boeing 737)

  • spicy pancake@lemmy.zipEnglish
    15·
    5 days ago

    “It’s just always exciting! That amazing moment when twelve tonnes of metal leaves the earth… and no-one knows why!”

    “Yes, we do.”

    “Yeah, but, you know, not really. I mean, we know you need wings, and engines, and a sticky-up bit on the end for some reason, but it’s not like we actually know why a plane stays in the air.”

    “No. No, Arthur, we really do! We- we do, we do know that!”

    • JasonDJ@lemmy.zip
      2·
      5 days ago

      I don’t know why but I thought that said “Archie” instead of “Arthur”, and read that as Archie and Edith Bunker…and it kind of worked. From the later seasons, when Edith was getting sick of his shit.

  • Flocklesscrow@lemm.eeEnglish
    13·
    5 days ago

    I find it equally neat how displacement allows a 100,000 ton ship to float.

    As I’m sure most know, planes fly because of the angle of their wings and airframe shape (also known as an airfoil). As moving air flows over the wing it creates downward pressure, which, as a result of Newton’s 3rd law (reaction to a force), allows moving air below to create lift. And upsy daisy she goes.

    Science.

  • BastingChemina@slrpnk.net
    5·
    4 days ago

    The wings are crazy ! They look way too flimsy for what they do.

    Next time you see an airplane, imagine a crane picking it up by the wings, around the middle of the wing length, and then start shaking it up.

    It does not look like the wing will be able to hold that much weight.

    • /home/pineapplelover@lemm.ee
      1·
      4 days ago

      I think whoever doesn’t look up as they hear a plane or helicopter flying is insane. Ever since as a child I have looked up.

  • Cyrus Draegur@lemm.eeEnglish
    9·
    5 days ago

    Consider the amount of air its wings must displace in order to stay aloft. An equal quantity of mass at least. It’s passing through that air and, partly pushing it down, but also partially scraping it thin over the bowed top surface of the wing (the Bernoulli principle) which creates a pressure differential that lifts the wing, pulling it upward through suction, and thus the plane. That’s why the plane must go fast to fly, and why it “stalls” and falls if it isn’t moving through enough air. It’s also how turbulence affects a plane. Differences in air pressure mean that in pockets of low pressure there isn’t as much mass being displaced by the wings, not enough lift so it falls.

    Now, it’s quite likely that my layman’s comprehension of this is flawed. But I’m sure it’s entirely possible that someone will correct me soon :3

      • Cyrus Draegur@lemm.eeEnglish
        7·
        5 days ago

        I fully expect to come back to lemmy in 48 hours to find a fascinatingly detailed and viciously incisive rebuttal that calls me at least three slurs in the first paragraph, sprinkles additional passive aggressive repudiations of my character throughout, and finishes with a tactical f-bomb too :D

    • NiHaDuncan@lemmy.world
      4·
      5 days ago

      To be pedantic: It’s not necessarily an equal amount of mass, it just has to accelerate (this includes deceleration which is acceleration opposing a component of a vector of travel) any amount of mass along and opposite to the vector of the plane’s acceleration due to gravity so long as the amount of mass (and the averaged amount of that mass’ acceleration in the aforementioned direction i.e. force) is in ratio with the planes mass and it’s acceleration due to gravity.

      There’s a lot of other pedantic caveats but they’d make this comment far too long. The main thing I want to convey is that mass doesn’t necessarily matter but rather force (m*v) and also that the “suction” and thereby acceleration that a plane’s airfoil experiences is also it causing an acceleration on the air around it by decelerating it along the path that it wants to flow. It all depends on frame of reference.

      I suck at explaining things, this video might do a better job at getting the idea across.

      • Cypher@lemmy.world
        3·
        5 days ago

        So there’s this neat thing in quantum mechanics where the state of something could change to a more stable state in what is known as false vacuum decay.

        Then it causes everything else of the same type to decay/collapse to the more stable state in a wave travelling in every direction at nearly the speed of light.

        Such an event could rewrite fundamental forces of the universe and… one day planes just stop working.

        Probably other bad stuff happens as well like our cells stop working and we all die.

        • Karyoplasma@discuss.tchncs.de
          2·
          5 days ago

          It’s like quantum tunneling, theoretically possible but not applicable to macroscopic objects. No matter how often you throw a tennis ball on a wall, it will never tunnel through even tho the calculated chance is non-zero and your amount of tries is infinite.