That's clever

Comments

• trxxruraxvr@lemmy.world ⁨1⁩ ⁨month⁩ ago

  The proportions are way off, you’re never going to reach Mars this way. You only need 1 mentos per 1 - 1.5 liter of coke

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  • stoy@lemmy.zip ⁨1⁩ ⁨month⁩ ago

    This made me wonder, what is the fuel and oxidizer in a coke/mentos reaction?

    To me, it seems like coke is the fuel, and mentos is the oxidizer.

    Or would you say that coke is a monopropellant and the mentos is just the igniter?

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    • Zer0_F0x@lemmy.world ⁨1⁩ ⁨month⁩ ago

      The fuel is CO2 gas within the coke that gets rapidly released by the surface texture of the mentos.

      Since the mentos doesn’t interact chemically it’s not an oxidizer, it interacts mechanically though so it acts as a turbopump maybe?

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    • alteredEnvoy@sopuli.xyz ⁨1⁩ ⁨month⁩ ago

      technically mentos is the catalyst

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  • Cerothen@lemmy.ca ⁨1⁩ ⁨month⁩ ago

    That’s the trick, it’s actually about advertising to increase the total NASA budget so that they can actually get some space travel done

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  • IAmNorRealTakeYourMeds@lemmy.world ⁨1⁩ ⁨month⁩ ago

    you need about 18000km/s delta V to go from Earth’s surface to Mars’s surface.

    A mentos+coke gets about a couple meters per second delta V.

    no, you cannot use 18 million bottles, because of the rocket equation

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    • Viking_Hippie@lemmy.dbzer0.com ⁨1⁩ ⁨month⁩ ago

      no, you cannot use 18 million bottles

      Not with that attitude, you can’t!

      because of the rocket equation

      “Equation esmation!”

      – whichever idiot Trump is undoubtedly about to appoint as head of NASA regardless of whether or not he is legally authorized to do so

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• ShaggyBlarney@lemmy.ca ⁨1⁩ ⁨month⁩ ago

  Whoa whoa whoa…everybody knows it’s diet coke that works best with mentos.

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  • HeyThisIsntTheYMCA@lemmy.world ⁨1⁩ ⁨month⁩ ago

    Apparently spacex doesn’t

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    • NatakuNox@lemmy.world ⁨1⁩ ⁨month⁩ ago

      I mean. Have you seen their owner lately? Also Trump needs all the diet coke for himself. You think we have enough to go around after he’s done?

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• 4am@lemmy.zip ⁨1⁩ ⁨month⁩ ago

  The fools! Diet works WAY better.

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  • Etterra@discuss.online ⁨1⁩ ⁨month⁩ ago

    If I remember correctly diet is the only one that works at all. I don’t know why.

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• abbadon420@sh.itjust.works ⁨1⁩ ⁨month⁩ ago

  What in the capitalistic hell is the plan, sponsorship?

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  • Tollana1234567@lemmy.today ⁨1⁩ ⁨month⁩ ago

    mentos and coke is used as propellant for science projects, or for fun.

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  • marcos@lemmy.world ⁨1⁩ ⁨month⁩ ago

    That’s literally the example in the XKCD 10k people comic. You should search for the coke + mentos thing, it’s cool.

    xkcd.com/1053/

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    • abbadon420@sh.itjust.works ⁨1⁩ ⁨month⁩ ago

      I know what coke and mentos do together. That has been mentioned plenty in this thread. My comment was going for a different take, a more literal interpretation of the image, but that seems to have missed its target.

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• Thyazide@lemmy.world ⁨1⁩ ⁨month⁩ ago

  en.wikipedia.org/…/Project_Orion_(nuclear_propuls…

  The whole unit was built into a can with a diameter no larger than 6 inches (150 mm) and weighed just over 300 pounds (140 kg) so it could be handled by machinery scaled up from a soft-drink vending machine; Coca-Cola was consulted on the design.[40]
  

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  • brown567@sh.itjust.works ⁨1⁩ ⁨month⁩ ago

    There’s video of a small-scale demo with conventional explosives:

    youtu.be/E3Lxx2VAYi8

    I’m surprised it’s not shared around more frequently XD

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• Rudee@lemmy.ml ⁨1⁩ ⁨month⁩ ago

  Any r/theydidthemath refugees around to calculate the amount of thrust you would receive from something like this?

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  • IAmNorRealTakeYourMeds@lemmy.world ⁨1⁩ ⁨month⁩ ago

    the questions are the specific impulse of those engines, then Delta-V.

    a mentos and coke can reach about 3m height gayser, therefore initial nozzle velocity is 7.67m/s, and a 2l bottle lasts about 2 seconds. resulting in a ISP of 0.7822 seconds.

    for comparison, the shuttle solid rocket booster has an isp of 250 seconds, a normal liquid rocket engine is about 450 seconds (the more the better).

    plugging in the weights of the Saturn 1, gives a delta V of [drumroll] 18.6 m/s… enough to accelerate a giant rocket to highway speeds.

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    • auzy1@lemmy.world ⁨1⁩ ⁨month⁩ ago

      Also, there would be ants everywhere in the vicinity after

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    • ivanafterall@lemmy.world ⁨1⁩ ⁨month⁩ ago

      Fine, be that way. Maybe we can use it for the little psshhh pshh boosters they use in space on the spacesuits, etc.

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• tiramichu@sh.itjust.works ⁨1⁩ ⁨month⁩ ago

  It’s actually nothing to do with mixing mentos and coke but just funding the mission via corporate sponsorship

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• stolig@lemmy.world ⁨1⁩ ⁨month⁩ ago

  Finally! Faster than light travel has been achieved!

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• zr0@lemmy.dbzer0.com ⁨1⁩ ⁨month⁩ ago

  I wouldn’t be surprised if Elon came up with such an idea in front of all the lead scientists at SpaceX.

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• Furbag@pawb.social ⁨1⁩ ⁨month⁩ ago

  Does this still count as a solid-fuel booster or is this some new science shit I’m too dumb and/or drunk to understand?

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