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TankovayaDiviziya@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

• neuromorph@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

  Its simple rocket math. Every lb of weight must consume fuel.

  Si.pky. 1 lb of weight needs 1 lb of fuel to escape orbit. But the fuel has weight also. So the effective fuel you need to lift the rocket and payload is exponential

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  • Town@lemmy.zip ⁨3⁩ ⁨weeks⁩ ago

    The tyranny of the rocket equation. Generally, 1% of weight is payload, 85% is fuel.

    scientificamerican.com/…/escaping-the-tyranny-of-…

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    • GamingChairModel@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

      Good article for pointing out that specific rocket math. The optimistic tone of that article, though, is very much a product of its publication date of February 2020. The space programs have suffered major technical, financial, and political setbacks since then, and the geopolitical moment doesn’t really lend itself to megaprojects like moon missions.

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    • Lucky_777@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

      The sooner humans can move past rocket tech the better to be honest.

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      • NewSocialWhoDis@lemmy.zip ⁨3⁩ ⁨weeks⁩ ago

        Stop living in a gravity well and we wouldn’t have to expend energy to get out of it!!

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• tetris11@feddit.uk ⁨3⁩ ⁨weeks⁩ ago

  • Artemis tanks were 10m wide and 30m tall.
  • Cylinder surface Area = (2pir^2^) * (2pir* h) ^[curved area plus top and bottom circles]
    • 2 * pi * 5 * 30 ~ 1100m^2^ to paint
  • Paints paints about 10m^2^ per Litre paint
  • Need 1100 / 10 = 110 Litres of paint
  • 1L of paint weighs about 2kg
  • 110 Litres of paint weighs about 220kg

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• icelimit@lemmy.ml ⁨3⁩ ⁨weeks⁩ ago

  Til dyscalculia. I hope you weren’t born in asia

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  • TankovayaDiviziya@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

    I am Asian 😂 I refuse to live up to the stereotype!

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    • chiliedogg@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

      Or expectations!

      Or are you a doctor?

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      • TankovayaDiviziya@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

        I won’t go too specific but my background is in biotech.

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    • icelimit@lemmy.ml ⁨3⁩ ⁨weeks⁩ ago

      So… you’re going to be a lawyer then?

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      • TankovayaDiviziya@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

        I already work on STEM, without the E, but a little bit of M.

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