[Milsurplus] DIY Vacuum Chamber

[hwhall@aol.com]

If you could create a perfect vacuum (no atoms or molecules of air or anything at all) inside a vessel , and assuming it's sitting in earth's normal atmosphere, there would still be only ~15psi attempting to crush the vessel.  You can't draw a vacuum lower than that. And the vacuum would register on a guage as approx -15psi.
I'm not sure minus 10000 psi has a meaning. Can you make a vacuum that's a harder vacuum than a perfect vacuum?
WayneWB4OGM
On Wednesday, September 23, 2026 at 05:27:42 PM MDT, Facility 406 <facility_406 at bruteforcedevelopment.com> wrote:

> I was always fearful of them when they were pumped down, but all the 
> engineers and other smart people insisted they were safe.

I used pistons to pull a vacuum, not a pump.  I was thinking last night, 
I've imploded a few cylinder walls by pulling too hard, or too fast.

I haven't studied the issue, I moved on to other things, but it does 
fall in line with how much of a vacuum can be pulled on a, say, 2,000 
PSI rated piston, drawing against something, using a lever on the 
piston, getting, in theory, several tons of draw.

At what point does "air", or lack there-of, fail, or get squirrely?

At what point does the chamber itself attempt to become a singularity?

~15 psi from the outside is one thing, and the best we'll ever get.

What about -10,000 from the inside?

Might be something to play with again in the future, as there some ideas 
I have.

Kurt

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