[ExI] trust the fake science?

[Keith Henson]

On Sun, Jun 9, 2024 at 11:06 AM Adrian Tymes via extropy-chat
<extropy-chat at lists.extropy.org> wrote:
>
> On Sun, Jun 9, 2024 at 1:48 PM Keith Henson <hkeithhenson at gmail.com> wrote:
>>
>> A long time ago I saw an analysis of this which used concrete for the
>> shell.  As I recall, the concrete was 6 inches thick and the whole
>> thing was a mile in diameter.
>
>
> Yeah, I'm going for a more practical size.  Something that would work well at the size of modern airship balloons.

I kind of doubt that will work.  The problem is not only the vast
force trying to collapse the balloon but also the buckling of the
skin.  The mechanical engineering for such structures is well
understood.  I don't think it would be hard to work out the needed
properties.  Then you need to find materials with the requisite
strength and density.  Maybe diamond.

Not sure this justifies a PhD project.  Maybe a day with Mathematica.

And it strikes me as something I would expect to find on the net, and
when I looked:

https://en.wikipedia.org/wiki/Vacuum_airship

Keith


______________________________________________
> extropy-chat mailing list
> extropy-chat at lists.extropy.org
> http://lists.extropy.org/mailman/listinfo.cgi/extropy-chat