OrbHab>SSI-List

Re: fly wheels
# 18776 byAl Globus on Dec. 10, 2003, 11:08 a.m.
Member since 2022-08-22

For emergency energy for an orbital space colony, could one use the
energy stored in the rotation of the colony itself? It could be used
for eclipses (usually only a few minutes) and for major failures of the
solar array.

There's a lot of energy available, particularly if the shielding
rotates. Anyone have an idea how to implement this?

Space tourism could be our ticket to the stars. Save your pennies,
suborbital flights for $100,000 may start in 2005! See
http://www.spaceadventures.com/suborbital for details.

Al Globus
CSC at NASA Ames Research Center
http://www.nas.nasa.gov/~globus/home.html

Views expressed in this email are only my opinions and are not the
position of any organization I'm familiar with.

# 18777 byCombs, Mike on Dec. 10, 2003, 11:21 a.m.
Member since 2022-08-22

Message Seems like this would be fairly simple to implement, using the same motors used to make up frictional losses as generators. I have the heroes in one of my stories do something very similar: http://members.aol.com/howiecombs/havnrock.htm

Regards,
Mike Combs

For emergency energy for an orbital space colony, could one use the
energy stored in the rotation of the colony itself? It could be used
for eclipses (usually only a few minutes) and for major failures of the
solar array.

There's a lot of energy available, particularly if the shielding
rotates. Anyone have an idea how to implement this?

# 18778 byChad Lupkes on Dec. 10, 2003, 11:25 a.m.
Member since 2022-08-22

energy stored in the rotation of the colony itself? It could be used
for eclipses (usually only a few minutes) and for major failures of the
solar array.

There's a lot of energy available, particularly if the shielding
rotates. Anyone have an idea how to implement this?

Space tourism could be our ticket to the stars. Save your pennies,
suborbital flights for $100,000 may start in 2005! See
http://www.spaceadventures.com/suborbital for details.

Al Globus
CSC at NASA Ames Research Center
http://www.nas.nasa.gov/~globus/home.html

Views expressed in this email are only my opinions and are not the
position of any organization I'm familiar with.

# 18779 byvictoriatangoman on Dec. 10, 2003, 11:26 a.m.
Member since 2022-08-22

> For emergency energy for an orbital space colony, could one use
the
> energy stored in the rotation of the colony itself? It could be
used
> for eclipses (usually only a few minutes) and for major failures
of the
> solar array.
>
> There's a lot of energy available, particularly if the shielding
> rotates. Anyone have an idea how to implement this?

Interesting question. If it could be done I'd be interested in the
details.

I tend to think it'll be like the Earth. There's a lot of energy
stored in the rotation of the Earth - how are you going to extract
it?

For a Habitat I think you'd need a BIG gearbox attached. Then as you
extracted energy you'd play havoc with internal gravity and then
have to restore the energy when you came out of eclipse. You'd also
have to use rocket exhaust to spin the Habitat back up. Why not just
use the rocket propellant and burn it in a furnace to get the energy
instead.

TangoMan

# 18780 byLĂșcio de Souza Coelho on Dec. 10, 2003, 1:23 p.m.
Member since 2022-08-22

This idea has already been proposed and discussed in another list
(howtobuildaspacehabitat@... , I think).

It would work only for colonies with counter-rotating shields. Then you could
have conventional dynamos at the "poles" of the colony, with their axis
connected to the shield, and then they would convert the rotational energy of
the system into electricity.

Oh, thinking better this would also work for colonies with counter-rotating
modules, like the O'Neil Cylinders.

Lucio Coelho

Em Qua 10 Dez 2003 15:10, Al Globus escreveu:

# 18781 byRaven on Dec. 10, 2003, 9:36 p.m.
Member since 2022-08-22

> For emergency energy for an orbital space colony, could one use the
> energy stored in the rotation of the colony itself? It could be used
> for eclipses (usually only a few minutes) and for major failures of the
> solar array.

> There's a lot of energy available, particularly if the shielding
> rotates. Anyone have an idea how to implement this?

It would be easy, if the habitat were attached to another, non-rotating mass. Just as kinetic energy may be extracted by slowing an object down, with respect to another body. And heat may be used to extract higher-quality energy, if the heat is permitted to flow into something cooler.
I suppose that a habitat with a non-rotating shielding may use this method, or an Island Three-type double cylinder - since the cylinders would be spinning in opposite directions.

Jon Lennart Beck.

# 18782 byLĂșcio de Souza Coelho on Dec. 11, 2003, 7:58 a.m.
Member since 2022-08-22

Em Qua 10 Dez 2003 21:02, Raven escreveu:
> It would be easy, if the habitat were attached to another, non-rotating
> mass. Just as kinetic energy may be extracted by slowing an object down,
> with respect to another body. And heat may be used to extract
> higher-quality energy, if the heat is permitted to flow into something
> cooler. I suppose that a habitat with a non-rotating shielding may use this
> method, or an Island Three-type double cylinder - since the cylinders would
> be spinning in opposite directions.

True, a detached non-rotating cylinder would also work - though it would start
to counter-rotate as the momentum transfer between the colony and the shield
occurs.

The same would apply for an habitat attached to a small planet or asteroid -
an architecture that probably will exist at some point in space colonization.

> Jon Lennart Beck.

Lucio de Souza Coelho

# 18783 byAl Globus on Dec. 11, 2003, 10:54 a.m.
Member since 2022-08-22

>> It would be easy, if the habitat were attached to another,
>> non-rotating
>> mass.

Translation: if you can do the hard part it's easy. Rotation speeds at
the rim exceed 100 mph. You have to be pretty close to generate power.
If you make contact with the non-rotating mass it's going to make your
average major earthquake look pretty nice by comparison.

If the dinosaurs had a space program, they'd still be here.

Al Globus
CSC at NASA Ames Research Center
www.nas.nasa.gov/~globus/home.html

# 18784 byAl Globus on Dec. 11, 2003, 5 p.m.
Member since 2022-08-22

I made a bad edit, Lucio did not write the "It would be ...", I took it
from a reply to Lucio's email. Sorry if anyone got the wrong
impression. My fault.

>
>>> It would be easy, if the habitat were attached to another,
>>> non-rotating
>>> mass.
>
> Translation: if you can do the hard part it's easy. Rotation speeds at
> the rim exceed 100 mph. You have to be pretty close to generate power.
> If you make contact with the non-rotating mass it's going to make
> your
> average major earthquake look pretty nice by comparison.
>

Space tourism could be our ticket to the stars. Save your pennies,
suborbital flights for $100,000 may start in 2005! See
http://www.spaceadventures.com/suborbital for details.

Al Globus
CSC at NASA Ames Research Center
http://www.nas.nasa.gov/~globus/home.html

Views expressed in this email are only my opinions and are not the
position of any organization I'm familiar with.