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Balloon in steel bottle pressurized to 200PSI (Patreon)

Published:
2018-08-03 10:46:07
Edited:
2018-08-03 11:14:17
Imported:
2021-10

Content

You can really see the balloon shrink as the pressure increases but you may also notice that the balloon remains aloft. 

In case you are wondering I was doing 3 tests here, 1: can the camera survive? 2: will a light bulb be able to handle the pressure? and of course 3: how small can I make the balloon while having it still float? lol at least I now have data on this up to 200 psi, however I'd like to take it to about 1300psi and 800F with a carbon dioxide atmosphere ( The surface conditions on Venus) and see if I can get a vacuum balloon working. 

Files

balloon in bottle 2 2

I was attempting to recreate my balloon in bottle video: https://www.youtube.com/watch?v=9YNhXs0G-vM except with a steel tank rated for 1000PSI Unfortunately a brass fitting started leaking and I decided to call it at just 200PSI. I'm going to try this again but with a bigger chamber, better camera, and hopefully no leaks.

Comments

Anonymous

Semi unrelated question. The dielectric strength of air at 1 atmosphere is like 1kv per mm. I should know the answer but would that increase or decrease with an increase in pressure.

CodysLab
>>14365175

depends on humidity but for dry air it will increase more or less linearly with pressure but will eventually decrease as the pressure gets so high that the molecules start to disassociate.

Anonymous

30 metric tons??? I don't know the numbers but the quantity is something absurd. And we don't have a single power producing reactor!!!! Such a shame.

Anonymous

Quantity that we have that is. All goes offshore

Anonymous

Mmmm metallic hydrogen. PBS space time had a great video or maybe Scott Manley about metallic H used as a 'rocket fuel'

Anonymous

Just the Energy in it reverting back into h2 is incredible. Theoretically that is

Anonymous

Oh BY THE WAY. CAN I JUST SAY. that footage of the waterbombing planes was fucking incredible man!!! I'm glad you guys came out all right. We are no strangers to bush fires in our part of Australia and even grass fires can and do cause devastation

Anonymous

Too many people are afraid of the fallout problem. The sad thing is that the only reason we use the reactors we do is basically war. Enriching it for weapons, using depleted stuff for weapons and of course you can't forget submarines and aircraft carriers... Before nuclear they had to fuel up every few days. The irony is there is a working salt reactor from the same era that as far as I know is still in operation but only just, they started it and hand manipulated it with long tools in the beginning if I recall the documentary correctly. Molten Salt reactors are self cooling, easier to cold start, don't really have the massive melt down problem but don't enrich uranium so they were less useful to the government, also they are heavier than water cooled units which ment they couldn't be used for navel vessels. But honestly I this day and age so we really need more of that stuff floating around? Enriched uranium that is... I mean I don't think we need tons more militaries either but tell the government's that. I read an article about a startup that wants to build a molten salt reactor and aside from the normal fuels it would actually run on nuclear waste. Note that's something we all should want

CodysLab
>>14365516

agreed. I like how that design is very versitial in the fuel it can burn. which is always good when we really need the nuclear to save us from global warming.

Anonymous

Well, I don't know about save us from global warming, I mean our current ice age has lasted a long time and it comes in cycles right? That's not to say we are not helping things along or making them worse or anything, but I have always thought that eventually the global climate would change to the warmer again. But that is only an opinion, based on the previous warnings and cooling periods. Of course the earth has mechanisms for balancing these things and when we interfere we are asking for trouble. No dumping carbon into the atmosphere is stupid, wind and solar are great but are not likely to be able to solve all the need, and I highly doubt any country will be ok with massive space collectors microwaving the power back to earth..... Death rays.... Yeah no, to provocative for our governments.... Though I could get behind some of the orbital ring ideas... Isaac Arthur I think his name is did a really good episode in the options and there are some real plausible ones there but even then I doubt it's enough for all the needs and MSR gobbling up radioactive waste by products from the beginning of the atomic age is just good for everyone

Anonymous

I don’t think i’ve ever seen such a small balloon float haha.

Silviu T

For Venus conditions you would need to add some sulfuric acid vapors. :)

U.S. Water Rockets

I don't believe you ever explained what gas was inside the balloon. At first I thought it was just ambient air, but then I saw it was floating in the unpressurized surrounding air, so it must be hydrogen or helium or some other lighter than air gas.

Anonymous

Claustrophobic. Unsubscribing.

Jasper

Balloon was filled with Helium, i presume? Hmm, so 13.8atm, and you want to go to 90atm, at 426C.. Make sure it doesn't break in such conditions.. Edit: idea of a vacuum balloon awesome btw.

Brian Reddeman

Not too many people decide "Hmm what happens if I put a light bulb, a balloon and a camera into a air tank and fill it to 200 psi". Awesome.

Anonymous
>>14365507

California gets roaring too. My brother-in-law was a firefighter/EMT until his knees said no more. Now he lives here in South Dakota with us, thank God! Or he would be strapped into his gear fighting the Redding Fire. That beast of a fire in Northern California isn't too far from where they used to live. You be safe there down under! My mother always wanted to go to Australia! 😁 ~Blessings to you and yours 🕊

Anonymous
>>14365694

It sure would be helpful if Gov't would stop spraying in the skies. That absolutely doesn't help with the climate issues or the ozone. Nor with the health of the population that gets sprayed on.

Anonymous

I'm really interested by the changes in the image due to pressure. Why did it go white as you let the pressure drop? Was it just fog in the chamber, if do why did it only go away when you opened the chamber fully? Why did it seem to get fuzzier as the pressure goes up? What light source did you use? How did you power everything? Was it the cable we see? I HAVE ALL THE QUESTIONS!!! :-) I think that means you are doing it right.

Nani Isobel

lol. I like the part at the end when you grabbed the string and started pulling the stuff out.

Nani Isobel
>>14383381

I suspect the index of refraction changed as the pressure went up. That would change the focus a little.

Nani Isobel

Might need an autofocus camera for higher pressures. Or a flat-faced external lens or whatever they use for over/under water cameras.