Dual Use? Gyromouse?( Segway Parts)

On Mon, 31 Jul 2006 21:24:31 +0100, Dr John Stockton wrote:

JRS: In article , dated Mon,
31 Jul 2006 00:01:40 remote, seen in news:sci.space.policy, Craig Fink
posted :
On Sun, 30 Jul 2006 22:59:27 +0000, Craig Fink wrote:

On Sun, 30 Jul 2006 22:19:31 +0000, Ian Stirling wrote:
A 30cm dia hole is probably at the very high end of reasonable
reaction time.

A 50cm balloon driven by a strong breeze heading towards hard vacuum.
Man, I hope that balloon gets stuck in the hole.

Atmospheric pressure is close to 1 kgf/cm^2; so, approximating pi by 3,
the balloon will need to sustain around 700 kgf, well over half of
whatever a US ton might be, while being supported by a possibly
irregular and/or sharpish edge.

I'm nor sure that even an FA-approved football would stand it.

How about a 50cm model of the Bigelow AeroSpace Hotel? Sitting in the
lobby of the Bigelow AeroSpace Hotel, of course. It can certainly hold 15
psi, and is made out of bulletproof material? The football (soccer ball)
would have to go in the Free Fall Gym, a popular place with a huge
open volume.

A Bigelow AeroSpace Hotel may not have any sharp edges arount the hole.
But, even if there were sharp edges around the hole, a properly design
balloon patch should be able to compensate for it. It probably would be
better to put a couple of high pressure hoops inside the balloon, so that
when the balloon hits the jagged hole, it deflates, but the much stronger,
higher pressure hoops don't. Forming a very loose trampoline, were the
outer sphere is now able to conform to the shape of all the stuff around
the hole. Putting some slime in in the balloon would also be a good idea.

http://www.slimesealant.com/index.phpHow

--
Craig Fink
Courtesy E-Mail Welcome @

Sorry about the broken link.

On Mon, 31 Jul 2006 21:24:31 +0100, Dr John Stockton wrote:

JRS: In article , dated Mon,
31 Jul 2006 00:01:40 remote, seen in news:sci.space.policy, Craig Fink
posted :
On Sun, 30 Jul 2006 22:59:27 +0000, Craig Fink wrote:

On Sun, 30 Jul 2006 22:19:31 +0000, Ian Stirling wrote:
A 30cm dia hole is probably at the very high end of reasonable
reaction time.

A 50cm balloon driven by a strong breeze heading towards hard vacuum.
Man, I hope that balloon gets stuck in the hole.

Atmospheric pressure is close to 1 kgf/cm^2; so, approximating pi by 3,
the balloon will need to sustain around 700 kgf, well over half of
whatever a US ton might be, while being supported by a possibly
irregular and/or sharpish edge.

I'm nor sure that even an FA-approved football would stand it.

How about a 50cm model of the Bigelow AeroSpace Hotel? Sitting in the
lobby of the Bigelow AeroSpace Hotel, of course. It can certainly hold 15
psi, and is made out of bulletproof material? The football (soccer ball)
would have to go in the Free Fall Gym, a popular place with a huge
open volume.

A Bigelow AeroSpace Hotel may not have any sharp edges around the hole.
But, even if there were sharp edges around the hole, a properly design
balloon patch should be able to compensate for it. It probably would be
better to put a couple of high pressure hoops inside the balloon, so that
when the balloon hits the jagged hole, it deflates, but the much stronger,
higher pressure hoops don't. Forming a very loose trampoline, were the
outer sphere is now able to conform to the shape of all the stuff around
the hole. Putting some slime in in the balloon would also be a good idea.

http://www.slimesealant.com/index.php

--
Craig Fink
Courtesy E-Mail Welcome @

John Doe wrote:

As a space station gets larger and larger, the probability of a failure
in one of the many modules goes up too. So, a door that closes
automatically becomes more and more important.

This is a double edge sword. You don't want to strand a crewmember on
the depressurizing side of the station.

In the ships, those automatic bulkheads still allowed crews down below
to climb to the top of the ship. Those bulkheads prevented water from
spreading horizontally. But on a station, close a hatch and people on
the damaged side cannot get to safety.

This is a situation submariners live with daily - it's not really a
problem.

D.
--
Touch-twice life. Eat. Drink. Laugh.

-Resolved: To be more temperate in my postings.
Oct 5th, 2004 JDL

On Thu, 03 Aug 2006 01:10:12 +0000, Derek Lyons wrote:

John Doe wrote:

As a space station gets larger and larger, the probability of a failure
in one of the many modules goes up too. So, a door that closes
automatically becomes more and more important.

This is a double edge sword. You don't want to strand a crewmember on
the depressurizing side of the station.

In the ships, those automatic bulkheads still allowed crews down below
to climb to the top of the ship. Those bulkheads prevented water from
spreading horizontally. But on a station, close a hatch and people on
the damaged side cannot get to safety.

This is a situation submariners live with daily - it's not really a
problem.

Not fun to think about, but it sure beats the alternative.

--
Craig Fink
Courtesy E-Mail Welcome @

Craig Fink wrote:

On Thu, 03 Aug 2006 01:10:12 +0000, Derek Lyons wrote:

John Doe wrote:


In the ships, those automatic bulkheads still allowed crews down below
to climb to the top of the ship. Those bulkheads prevented water from
spreading horizontally. But on a station, close a hatch and people on
the damaged side cannot get to safety.

This is a situation submariners live with daily - it's not really a
problem.

Not fun to think about, but it sure beats the alternative.

One of the things that defines a submariner is this: You live daily
with the knowledge that today may be the day you have to order a buddy
to shut a hatch in your face to save the ship. Or even worse, you
have to shut the hatch in *his* face. We deal with this - its just a
fact of life. To the public - the question never even arises.
(Except during a nine days wonder like Greenville or San Francisco.)

Yet somehow, folks the John Done (and he is hardly a minority) seem to
think that astronaut lives are different.

D.
--
Touch-twice life. Eat. Drink. Laugh.

-Resolved: To be more temperate in my postings.
Oct 5th, 2004 JDL

On Sun, 23 Jul 2006 20:34:33 GMT, in a place far, far away, Craig Fink
made the phosphor on my monitor glow in such a
way as to indicate that:


What is the meaning of "Duel Use"?

Use for the settling of disputes? Pistols or swords?

h (Rand Simberg) wrote:

On Sun, 23 Jul 2006 20:34:33 GMT, in a place far, far away, Craig Fink
made the phosphor on my monitor glow in such a
way as to indicate that:


What is the meaning of "Duel Use"?

Use for the settling of disputes? Pistols or swords?

I was amused a few years ago to see an ad for a heating blanket with
"duel controls". It quickly brought to mind the image of a couple
literally fighting over the temperature.