h a l f b a k e r yWhat was the question again?
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Produce an "aerogel" evacuating the air fill in order to
enclose vacuum in the process. Maybe other matter
would
compound the struture (as for example aluminum)
sufficiently to avoid shrinking but enough ligher-weight
to
create a effective light-than-air lattice. Let's suppose we
can produce
at low cost (overwhelming a formidable
phalanx
of technological barriers) large quatities of Hiper Light
Silica (HLS). By synthetizing it massively will permit
gather
and storage amount of enormous volume of critical
cummulating mass in a huge flying
assemblage looking forwardly to apply a
Trans"Air"tlantic ship construction.
Develop a lighter-than-air solid
Develop_20a_20lighter-than-air_20solid
[xaviergisz, Feb 24 2010]
lightest aerogel *is* LTA
http://en.wikipedia...wiki/Aerogel#Silica
and it's evacuated. [FlyingToaster, Feb 27 2010]
Real Vacuum Airship
http://en.wikipedia...airship#cite_note-1
Hey guys I found a interest address (anyway thanks for meet me the reality) [Yesearch, Apr 05 2010]
Aerogel podcast
http://www.aerogel.org/?p=1250
which claims to mention the making of thermite aerogel, although I've not actually played the 'cast [lurch, Nov 08 2010]
[link]
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I hate it when sand gets stuck to my lolly. |
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Why not? Silica (or silicon) is the most abundant
element on earth crust, sufficiently enough to
produce large quantities in order to build blocks of
such hypothetical material. |
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the <link> will 'help' you. |
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This is what I call helpful and quality member: thanks
a lot! Glad for that reference. |
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<sigh> subtlety, wherefore art thou.... does 'help' translate as 'do not read' in other languages/cultures ? |
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sounds more foreigner/potential-HB'er who's got the wrong impression. |
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LTA-aerogel would be neat, but from what impression I've got of the stuff, it's sorta crumbly, so you'd still need a way of distributing the weight to avoid crushing it which means an envelope anyways... on the other hand I thought of a way to overcome the problem of the H2 dissipation... just 'soak' the substance in H2 when you're not using it. [edit] but not the problem of turning a nicely flammable H2 into a nicely explosive H2+Air which is what the composition of a solid matrix would be after a few hours exposure to the atmosphere. |
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Okay guys, I meet the reality of being foreing in a
english site (thanks to you). However, is that
contribution all you've got? C'mon, show me what you
got! |
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[marked-for-deletion] not an idea. |
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FlyingToaster, I made a acreation of matter to the
idea. Please, check it out (I think finally we got an
idea). |
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//I think we finally got an idea//
really ? maybe you should post it on a site where people go to post their ideas. |
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I'm not actually against the idea theoretically, but what advantages would a solid have over H2 or He in a bag ? |
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(interesting fact: the blue colour is from the size of the bubbles) |
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You may not be aware of this, but you can actually make an aerogel out of thermite. |
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Hi Yesearch, and welcome to the HalfBakery! Ignore the
grumpy locals - they are bots. But I think "lighter-than-air
aerogel" has been thought of before.... |
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The ligtest aerogel is about 4 times as dense as air. If you took all the air out, it would still weigh 3 times as much. And if you replaced the air with hydrogen, it's about the same--3 times as much. By the same measure, hydrogen without the aerogel weights .07 times as much as air. So if you want to be hyper light, use a hydrogen balloon. |
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The lightest solid is an evacuated silica nanofoam at 1mg/c3... air weighs in at 1.2mg/c3 <link> |
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If I wanted to build something lightweight, even from //The lightest solid//, I probably wouldn't use in solid form. Just as if I were building a ship from steel, it would work as long as I didn't try to make it *solid* steel. |
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A honeycombed aerogel structure with a low-permeability skin would likely hold quite nicely against atmospheric pressure, particularly with a bit of support from a partial-pressure low-density gas. |
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what you *could* do is use an evacuated aerogel, but to avoid immigration of air which would bring it from 1.0 to 1.9 mg/c3, immerse it in hydrogen in between runs. |
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but you'd still need lots more aerogel than you would H2 or He. |
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Essentially, you require a skin to keep the air out. Then you have to establish that the aerogel has crush resistance above 14.5 psi (air pressure). While that seems feasible, you still have, in essence, a gas-proof bag full of aerogel. |
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Density of the lighest aerogel = 1mg/cm3.
Density of hydrogen at STP = 0.089 mg/cm3.
(STP - standard temperature and pressure) |
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Therefore, your aerogel-bag is 11 times heavier than the same bag full of hydrogen. |
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Therefore, best to throw away the aerogel and fill your bag with H2. |
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Perhaps the aerogel could be used structurally? |
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More on the Thermite aerogel please, good [lurch}. A blimp made of thermite hydrogen aerogel offers certain advantages, it seems to me. |
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'k, there's a link. If you just google "aerogel recipe thermite", it actually comes up with quite a few hits. |
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