How do we construct the basic pressure vessel for space habs? Let's say we
want to construct a sphere 1 Km in diameter.

Regards,
Selvaraj

Regards,
Selvaraj

sraj sraj99@... [spacesettlers] wrote:

> How do we construct the basic pressure vessel for space habs? Let's say
> we want to construct a sphere 1 Km in diameter.

Same as constructing any other pressure vessel welding or winding, or
some combination thereof.

A 1 km diameter (500 m radius) is challenging but doable. I seem to
recall that if you use aluminum, it would have to be half a meter thick
at that radius. (Check my math with High Frontier, which calculates the
correct hull thickness for several different shapes and materials.)

Best,
- Joe

It will be interesting to construct a spherical shell of 100 m diameter by
some winding process to understand how such shells can be made quickly in
space.

Regards,
Selvaraj

On 20 June 2018 at 19:59, Joe Strout joe@strout.net [spacesettlers] <
spacesettlers@yahoogroups.com> wrote:

>
> sraj sraj99@... [spacesettlers] wrote:
>
> > How do we construct the basic pressure vessel for space habs? Let's say
> > we want to construct a sphere 1 Km in diameter.
>
> Same as constructing any other pressure vessel welding or winding, or
> some combination thereof.
>
> A 1 km diameter (500 m radius) is challenging but doable. I seem to
> recall that if you use aluminum, it would have to be half a meter thick
> at that radius. (Check my math with High Frontier, which calculates the
> correct hull thickness for several different shapes and materials.)
>
> Best,
> - Joe
>

Regards,
Selvaraj
On 20 June 2018 at 19:59, Joe Strout
joe@...
[spacesettlers]
<
spacesettlers@...m
>

sraj
sraj99@...
[spacesettlers] wrote:
> How do we construct the basic pressure vessel for space habs? Let's say
> we want to construct a sphere 1 Km in diameter.
Same as constructing any other pressure vessel welding or winding, or
some combination thereof.
A 1 km diameter (500 m radius) is challenging but doable. I seem to
recall that if you use aluminum, it would have to be half a meter thick
at that radius. (Check my math with High Frontier, which calculates the
correct hull thickness for several different shapes and materials.)
Best,
- Joe

The first application we can think of is a space hotel. People when they go
on vacation look for wide open spaces. A space hotel should should have a
diameter of at least 100m.

Regards,
Selvaraj

On 24 June 2018 at 22:43, sailorbarsoom@... [spacesettlers] <
spacesettlers@yahoogroups.com> wrote:

>
> I wish we would. It can be argued that there is no need for such a
> facility, but if the capability to make it is demonstrated, somebody will
> find a use for it.
>
> Also, if we are going to botch the first few attempts (which seems
> likely), I'd rather it be now and not when such a botch delays some vital
> project by a few years.
>

Regards,
Selvaraj
On 24 June 2018 at 22:43,
sailorbarsoom@...
[spacesettlers]

spacesettlers@yahoogroups.com
>

I wish we would. It can be argued that there is no need for such a facility, but if the capability to make it is demonstrated, somebody will find a use for it.
Also, if we are going to botch the first few attempts (which seems likely), I'd rather it be now and not when such a botch delays some vital project by a few years.

Yes. While the fashion in space hab design so far has been to opt for zero
g, a hotel should be a place of fun and interest, this can be achieved by
giving the hab a small spin. This will keep objects in place and make
moving around more interesting. At the spin axis obviously we will have
zero g.

Regards,
Selvaraj

On 25 June 2018 at 17:42, sailorbarsoom@... [spacesettlers] <
spacesettlers@yahoogroups.com> wrote:

>
> Sports facility?
>

Regards,
Selvaraj
On 25 June 2018 at 17:42,
sailorbarsoom@...
[spacesettlers]
<
spacesettlers@yahoogroups.com
>

Sports facility?

this adds of course the joys of either having to dock on a rotating body (so the station will have only two docking ports) or having to build a really large dual spin structure (i can hear the howls of the structural engineers, as well as those of the bearing specialists and the rotating seal gurus)

servus

markus

> "sraj sraj99@... [spacesettlers]" hat am 26. Juni 2018 um 09:06 geschrieben:
>
> Yes. While the fashion in space hab design so far has been to opt for zero g, a hotel should be a place of fun and interest, this can be achieved by giving the hab a small spin. This will keep objects in place and make moving around more interesting. At the spin axis obviously we will have zero g.
>
> Regards,
> Selvaraj
>
> On 25 June 2018 at 17:42, sailorbarsoom@... mailto:sailorbarsoom@... [spacesettlers] wrote:
>
> > >
> >
> > Sports facility?
> >
> > >
>

>

servus
markus
"sraj sraj99@... [spacesettlers]" hat am 26. Juni 2018 um 09:06 geschrieben:

Yes. While the fashion in space hab design so far has been to opt for zero g, a hotel should be a place of fun and interest, this can be achieved by giving the hab a small spin. This will keep objects in place and make moving around more interesting. At the spin axis obviously we will have zero g.
Regards,
Selvaraj
On 25 June 2018 at 17:42,
sailorbarsoom@...
[spacesettlers] <
spacesettlers@yahoogroups.com
> wrote:

Sports facility?

baur baur baur@... [spacesettlers] wrote:

> this adds of course the joys of either having to dock on a rotating body
> (so the station will have only two docking ports) or having to build a
> really large dual spin structure (i can hear the howls of the structural
> engineers, as well as those of the bearing specialists and the rotating
> seal gurus)

I don't think it'll be that bad. We have rotating seals on Earth (for
example in hydraulic machines) that hold a much greater pressure
differential than 1 ATM.

Obviously it'd be nice to have some real-world experience doing this in
space... add this to the list of things NASA should have been doing for
the last 50 years. :)

Best,
- Joe

Am 26.06.2018 um 15:27 schrieb Joe Strout joe@... [spacesettlers]:
> baur baur baur@... [spacesettlers] wrote:
>
> > this adds of course the joys of either having to dock on a rotating body
> > (so the station will have only two docking ports) or having to build a
> > really large dual spin structure (i can hear the howls of the structural
> > engineers, as well as those of the bearing specialists and the rotating
> > seal gurus)
>
> I don't think it'll be that bad. We have rotating seals on Earth (for
> example in hydraulic machines) that hold a much greater pressure
> differential than 1 ATM.

yes - but these seals do not tend to be lossfree

servus

markus

> Obviously it'd be nice to have some real-world experience doing this in
> space... add this to the list of things NASA should have been doing for
> the last 50 years. :)
>
> Best,
> - Joe

--
markus baur SCA: markus von brixlegg
schluesselgasse 3/5 tel: +43 - (0)1 - 50 40 662
a-1040 wien email: baur@...
austria/europe icbm: 4811'39"N; 1622'06"E

a portrait: http://www.abcgallery.com/A/arcimboldo/arcimboldo9.html

"der Markus?? .... das ist der mit dem Buch..."

To simulate gravity on the Moon, a 100 m dia hab needs to rotate only at
around 2 rpm.

Selvaraj

On 26 June 2018 at 20:15, markus baur baur@... [spacesettlers] <
spacesettlers@yahoogroups.com> wrote:

>
> Am 26.06.2018 um 15:27 schrieb Joe Strout joe@... [spacesettlers]:
> > baur baur baur@... [spacesettlers] wrote:
> >
> > > this adds of course the joys of either having to dock on a rotating
> body
> > > (so the station will have only two docking ports) or having to build a
> > > really large dual spin structure (i can hear the howls of the
> structural
> > > engineers, as well as those of the bearing specialists and the rotating
> > > seal gurus)
> >
> > I don't think it'll be that bad. We have rotating seals on Earth (for
> > example in hydraulic machines) that hold a much greater pressure
> > differential than 1 ATM.
>
> yes - but these seals do not tend to be lossfree
>
> servus
>
> markus
>
> > Obviously it'd be nice to have some real-world experience doing this in
> > space... add this to the list of things NASA should have been doing for
> > the last 50 years. :)
> >
> > Best,
> > - Joe
>
> --
> markus baur SCA: markus von brixlegg
> schluesselgasse 3/5
>
> tel: +43 - (0)1 - 50 40 662
> a-1040 wien email: baur@...
> austria/europe icbm: 4811'39"N; 1622'06"E
>
> a portrait: http://www.abcgallery.com/A/arcimboldo/arcimboldo9.html
>
> "der Markus?? .... das ist der mit dem Buch..."
>

Selvaraj
On 26 June 2018 at 20:15, markus baur
baur@...
[spacesettlers]

spacesettlers@yahoogroups.com
>

Am 26.06.2018 um 15:27 schrieb Joe Strout
joe@...
[spacesettlers]:
> baur baur
baur@...
[spacesettlers] wrote:
>
> > this adds of course the joys of either having to dock on a rotating body
> > (so the station will have only two docking ports) or having to build a
> > really large dual spin structure (i can hear the howls of the structural
> > engineers, as well as those of the bearing specialists and the rotating
> > seal gurus)
>
> I don't think it'll be that bad. We have rotating seals on Earth (for
> example in hydraulic machines) that hold a much greater pressure
> differential than 1 ATM.
yes - but these seals do not tend to be lossfree
servus
markus
> Obviously it'd be nice to have some real-world experience doing this in
> space... add this to the list of things NASA should have been doing for
> the last 50 years. :)
>
> Best,
> - Joe
markus baur SCA: markus von brixlegg
schluesselgasse 3/5
tel: +43 - (0)1 - 50 40 662
a-1040 wien email:
baur@...
austria/europe icbm: 4811'39"N; 1622'06"E
a portrait:
http://www.abcgallery.com/A/
arcimboldo/arcimboldo9.html
"der Markus?? .... das ist der mit dem Buch..."

I was wondering about the real estate that can be realised in a 100 m dia
space hab (hotel).

....................................Spin Axis
........................................I........................................
........................................*.................................
.........................*..............................*.............................
....................*....*..............................*.....*......................
.................*.......*..............................*..........*..............
..............*..........*..............I...............*............*.............
.............*...........*..............................*...............*..............
............*............*..............................*................*...............
...........*.............*..............................*................*..............
...........*.............*..............I...............*................*..............
............*............*..............................*...............*...............
..............*..........*..............................*.............*.............
.................*.......*..............I...............*..........*..............
....................*........................................*......................
.........................*..............................*.............................
........................................*.................................
........................................I........................................

The above diagram shows a deck at a radius of 25m, let's design with four
decks at radii 40m, 35m, 30m and 25m. This will leave a large zero g area
for sports in the central region.

The real estate that will be realised are:

Deck........At
Radius...........Width...............Circumference..............Area
..No...............m.......................m............................m........................m^2
...1................40.....................60.........................251........................15072
...2................35.....................71..........................220........................15697
...3................30.....................80..........................188........................15072
...4................25.....................86...........................157.......................13596
........................................................................................Total
Area 59437

Quite a wast estate, almost 6 nos 100m x 100m areas..

Regards,
Selvaraj

On Mon, 25 Jun 2018 at 17:44, sailorbarsoom@... [spacesettlers] <
spacesettlers@yahoogroups.com> wrote:

>
> Sports facility?
>

....................................Spin Axis
........................................I........................................
........................................*.................................
.........................*..............................*.............................
....................*....*..............................*.....*......................
.................*.......*..............................*..........*..............
..............*..........*..............I...............*............*.............
.............*...........*..............................*...............*..............
............*............*..............................*................*...............
...........*.............*..............................*................*..............
...........*.............*..............I...............*................*..............
............*............*..............................*...............*...............
..............*..........*..............................*.............*.............
.................*.......*..............I...............*..........*..............
....................*........................................*......................
.........................*..............................*.............................
........................................*.................................
........................................I........................................
The above diagram shows a deck at a radius of 25m, let's design with four decks at radii 40m, 35m, 30m and 25m. This will leave a large zero g area for sports in the central region.
The real estate that will be realised are:
Deck........At Radius...........Width...............Circumference..............Area
..No...............m.......................m............................m........................m^2
...1................40.....................60.........................251........................15072
...2................35.....................71..........................220........................15697
...3................30.....................80..........................188........................15072
...4................25.....................86...........................157.......................13596
........................................................................................Total Area 59437
Quite a wast estate, almost 6 nos 100m x 100m areas..
Regards,
Selvaraj
On Mon, 25 Jun 2018 at 17:44,
sailorbarsoom@tx.rr.com
[spacesettlers] <
spacesettlers@yahoogroups.com
> wrote:

Sports facility?

Interior hulls make for a lot of space. Why they arent more popular is beyond me.

> On Jul 21, 2018, at 9:58 AM, sraj sraj99@... [spacesettlers] wrote:
>
> I was wondering about the real estate that can be realised in a 100 m dia space hab (hotel).
>
> .....................................Spin Axis
> ........................................I.........................................
> .........................................*.................................
> ..........................*..............................*.............................
> .....................*....*..............................*.....*......................
> .................*........*..............................*..........*..............
> ..............*..........*..............I...............*............*.............
> .............*...........*...............................*...............*..............
> ............*............*...............................*................*...............
> ...........*..............*..............................*................*..............
> ...........*..............*..............I...............*................*..............
> ............*............*...............................*...............*...............
> ...............*..........*..............................*.............*.............
> .................*........*..............I...............*..........*..............
> .....................*........................................*......................
> ..........................*..............................*.............................
> .........................................*.................................
> .........................................I........................................
>
> The above diagram shows a deck at a radius of 25m, let's design with four decks at radii 40m, 35m, 30m and 25m. This will leave a large zero g area for sports in the central region.
>
> The real estate that will be realised are:
>
> Deck.........At Radius...........Width...............Circumference..............Area
> ..No...............m.......................m.............................m........................m^2
> ...1.................40.....................60.........................251.........................15072
> ...2................35......................71..........................220........................15697
> ...3................30.....................80...........................188........................15072
> ...4.................25.....................86...........................157........................13596
> .........................................................................................Total Area 59437
>
> Quite a wast estate, almost 6 nos 100m x 100m areas..
>
> Regards,
> Selvaraj
>
> On Mon, 25 Jun 2018 at 17:44, sailorbarsoom@... [spacesettlers] > wrote:
>
> Sports facility?
>

On Jul 21, 2018, at 9:58 AM, sraj
sraj99@...
[spacesettlers] <
spacesettlers@yahoogroups.com
> wrote:
I was wondering about the real estate that can be realised in a 100 m dia space hab (hotel).
.....................................Spin Axis
........................................I.........................................
.........................................*.................................
..........................*..............................*.............................
.....................*....*..............................*.....*......................
.................*........*..............................*..........*..............
..............*..........*..............I...............*............*.............
.............*...........*...............................*...............*..............
............*............*...............................*................*...............
...........*..............*..............................*................*..............

...........*..............*..............I...............*................*..............

............*............*...............................*...............*...............

...............*..........*..............................*.............*.............

.................*........*..............I...............*..........*..............
.....................*........................................*......................
..........................*..............................*.............................
.........................................*.................................

.........................................I........................................

The above diagram shows a deck at a radius of 25m, let's design with four decks at radii 40m, 35m, 30m and 25m. This will leave a large zero g area for sports in the central region.
The real estate that will be realised are:
Deck.........At Radius...........Width...............Circumference..............Area
..No...............m.......................m.............................m........................m^2
...1.................40.....................60.........................251.........................15072
...2................35......................71..........................220........................15697
...3................30.....................80...........................188........................15072
...4.................25.....................86...........................157........................13596
.........................................................................................Total Area 59437
Quite a wast estate, almost 6 nos 100m x 100m areas..
Regards,
Selvaraj
On Mon, 25 Jun 2018 at 17:44,

sailorbarsoom@tx.rr.com

[spacesettlers] <
spacesettlers@yahoogroups.com
> wrote:

Sports facility?

> On Jul 23, 2018, at 6:04 AM, 'Combs, Mike' mikecombs@... [spacesettlers] wrote:
>
> > Interior hulls make for a lot of space. Why they arent more popular is beyond me.
>
> It just depends on your design goal. If your design goal is to house the maximum number of people in the minimum pressurized, shielded volume, and find small metal rooms with artificial illumination acceptable, then multiple decks is the way to go.
>
There is no particular reason interior hulls mean small living quarters in the 1g region. For a same sized system, it actually means larger rooms as, for example, much of the life support (which takes a lot of space) can go in the interior hulls.

> If your goal is to recreate some of the most attractive land area we ever see here on Earth (ONeills design goal), then you want large open spaces overhead (volumes perhaps even enough to enable natural weather), creating a sense of sky,
>
Without interior hulls you dont get sky you get an overhead view of your neighbors back yard (and other stuff). The outside of the largest interior hull is your sky and can be used as structure for LED lighting whos color can be controlled for a variety of effects including Earth-like skys.

> preferably with natural sunlight, then designs more like what we saw in The High Frontier are called for.
>
> It isnt that the people advocating the latter are just missing some essential point; they just have a design goal which differs from that others might have.
>
> Regards,
> Mike Combs
>

mikecombs@...
[spacesettlers] <
spacesettlers@yahoogroups.com
> wrote:
> Interior hulls make for a lot of space. Why they arent more popular is beyond me.
It just depends on your design goal. If your design goal is to house the maximum number of people in the minimum pressurized, shielded volume, and find small metal rooms with artificial illumination acceptable, then multiple decks is the way to go.
There is no particular reason interior hulls mean small living quarters in the 1g region. For a same sized system, it actually means larger rooms as, for example, much of the life support (which takes a lot of space) can go in the interior hulls.
If your goal is to recreate some of the most attractive land area we ever see here on Earth (ONeills design goal), then you want large open spaces overhead (volumes perhaps even enough to enable natural weather), creating a sense of sky,
Without interior hulls you dont get sky you get an overhead view of your neighbors back yard (and other stuff). The outside of the largest interior hull is your sky and can be used as structure for LED lighting whos color can be controlled for a variety of effects including Earth-like skys.
preferably with natural sunlight, then designs more like what we saw in The High Frontier are called for.

It isnt that the people advocating the latter are just missing some essential point; they just have a design goal which differs from that others might have.
Regards,

Mike Combs