On Thu 03 Nov 2022 at 17:27:17 (+0100), to...@tuxteam.de wrote:
> Nice stories :) I did theoretical physics, but of course, our
> faculty was chock full of crazy and interesting folks doing stuff
> like you described above. Searching for leaks in the apparatus
> consisted of... pumping it full of
On 11/3/22 10:39, David Wright wrote:
[...]
Do you think they cared?
Of course not, our taxes were footing the bill and they can always
feel that last penny and be upset they did not get it.
Forget John Glenn: his ride was just the
consolation prize. You have the US Government in a panic to
Hi,
i looked up some data points about helium.
This table gives floating times for helium balloons and the pressure in
usual helium cylinders (200 bar).
https://de.wikipedia.org/wiki/Luftballon#Ma%C3%9Fe
The numbers of fillings per ballon diameter in the "10 liter" column
indicate that the car
On Thu, Nov 03, 2022 at 03:34:54PM +, mick.crane wrote:
[...]
> I know next to nothing about this stuff but it helps me to think that rather
> than everything made of little things that it's clouds of god knows what
> swirling about.
Yes, the depth of the "technological stack" is sometimes s
On Thu, Nov 03, 2022 at 09:38:20AM -0500, David Wright wrote:
> On Wed 02 Nov 2022 at 06:44:22 (+0100), to...@tuxteam.de wrote:
[...]
> > Of course, if you've got 200 or 500 bar, something might leak.
>
> Yes, that referred only to the gas cylinders (snipped from the above).
I understood that.
On 2022-11-03 14:38, David Wright wrote:
You still don't get it, the helium molecule is so small it wiggles
thru a steel walls huge molecules
like they were a layer of felt. Monel alloy is denser but it still
leaks.
I haven't done the experiments, but others, like this pair, have.
https://w
On Wed 02 Nov 2022 at 06:44:22 (+0100), to...@tuxteam.de wrote:
> On Wed, Nov 02, 2022 at 12:06:16AM -0500, David Wright wrote:
> > On Tue 01 Nov 2022 at 06:49:09 (+0100), to...@tuxteam.de wrote:
>
> [...]
>
> > > This is only a half-truth. You know what goes out faster than helium?
> > > Vacuum.
On 11/2/22 01:07, David Wright wrote:
On Tue 01 Nov 2022 at 06:49:09 (+0100), to...@tuxteam.de wrote:
On Mon, Oct 31, 2022 at 06:32:17PM -0400, gene heskett wrote:
[...]
I think, but don't know for sure, that they were also helium filled drives,
a guaranteed disaster.
They used the helium to
On 2022-11-02, David Wright wrote:
>
> To be fair, most vacuum tubes aren't bathed in helium, but air, and
> then only at a one atmosphere differential pressure. A gas cylinder
> might be as high as 500 atmospheres.
I always thought vacuum tubes weren't filled with anything but a "high
vacuum" an
On Wed, 2 Nov 2022, David Wright wrote:
Whatever, even I with an 8th grade diploma, knows you cannot keep helium
anyplace for very long. Put it in a monel metal
bottle with walls an inch thick and its molecules's are so small that 10% of
it is gone in 6 or 7 hours.?
So the He cylinders that we
On Wed, Nov 02, 2022 at 12:06:16AM -0500, David Wright wrote:
> On Tue 01 Nov 2022 at 06:49:09 (+0100), to...@tuxteam.de wrote:
[...]
> > This is only a half-truth. You know what goes out faster than helium?
> > Vacuum. And there was a whole glorious epoch in electronics which did
> > rely on kee
On Tue 01 Nov 2022 at 06:49:09 (+0100), to...@tuxteam.de wrote:
> On Mon, Oct 31, 2022 at 06:32:17PM -0400, gene heskett wrote:
>
> [...]
>
> > I think, but don't know for sure, that they were also helium filled drives,
> > a guaranteed disaster.
> >
> > They used the helium to make the heads fl
On Mon, Oct 31, 2022 at 06:32:17PM -0400, gene heskett wrote:
I think, but don't know for sure, that they were also helium filled
drives, a guaranteed disaster.
https://www.mail-archive.com/debian-user@lists.debian.org/msg780296.html
gene heskett Sun, 13 Mar 2022 14:49:25 -0700
The first to
On 11/1/22 01:50, to...@tuxteam.de wrote:
On Mon, Oct 31, 2022 at 06:32:17PM -0400, gene heskett wrote:
[...]
I think, but don't know for sure, that they were also helium filled drives,
a guaranteed disaster.
They used the helium to make the heads fly lower, and when the helium leaked
out, an
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