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Thread: Okay go with me I need a number no matter how ridiculous. This is about bubbles!

  1. #1 Okay go with me I need a number no matter how ridiculous. This is about bubbles! 
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    Okay how many bubbles would be needed to push a light metal alloy aerodynamic craft out of the atmosphere? Can you make something float by pressurizing oxygen inside of it? Here's my thinking if both my entirely uninformed theorys bode true you could send a craft up with the pressurization then use the pressurized air to create the infinite amount of bubbles nessicary to punch it through the atmosphere. Is then anyway to enhance tiny bubbles to last longer and get more bang for the buck when shot out at high speeds?

    -JustAquestion


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  3. #2  
    Genius Duck Moderator Dywyddyr's Avatar
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    Quote Originally Posted by JustAquestion View Post
    Okay how many bubbles would be needed to push a light metal alloy aerodynamic craft out of the atmosphere?
    It won't work.
    Bubbles are - at best - of neutral buoyancy (or close to it). They don't lift at all. The only reason they seem to seem to float/ climb is because they're close to the density of air and any breeze will move them about.

    Can you make something float by pressurizing oxygen inside of it?
    No. Pressurised oxygen will be denser than the surrounding air. Add that extra weight to the weight of the container and there's no lift at all.

    Here's my thinking if both my entirely uninformed theorys bode true you could send a craft up with the pressurization then use the pressurized air to create the infinite amount of bubbles nessicary to punch it through the atmosphere. Is then anyway to enhance tiny bubbles to last longer and get more bang for the buck when shot out at high speeds?
    The idea is a non-starter.


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    A whole lot of problems with this - starting with the essential difficulty with launch to space is not in gaining altitude, but gaining enough velocity that you don't fall back down when you stop boosting. Lighter than air at sea level is not the same as lighter than air at low earth orbit.

    Lighter than air materials - closed cell foams with Hydrogen or Helium perhaps - could make aircraft and other constructions lighter but I shudder to think of the intractable litter problem that could result.
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