Looking for O'Neill Cylinder Model

[Dollan]

Does anyone have one handy? I've scoured the Internet, and have come up with squat. I have a couple of models by Steve Bowers, but they have some additions to them. What I'm looking for is a standard model, as similar as possible to the original concept design as I can get.

And yes, I've been trying to mkae one with Anim8tor, but my results are, well... let's just say no one would want to live on the stations I've managed to create!

...John...

[Dollan]

Oops... and a secondary question related to this: how does one define a trojan orbit, specifically at the L4 and L5 points?

...John...

Added: Oops, never mind. I found out; just added 60 degrees to the MeanLongitude....

[selden]

You can't, not accurately, because the Moon's orbit is calculated internal to Celestia.

You can only provide a rough approximation by using the Moon's EllipticalOribit parameters (which Celestia isn't using for the Moon) and placing the habitats +/- 60 degrees away from the Moon.

[eburacum45]

There is one available in the Hoshikase pack which is on Jeam Tags site; it has no texture, however.
http://jeam.tag.free.fr/CELESTIAhtml/Ce ... ns-SF2.htm
towards the bottom of the page, very small.

I am intending to make a more accurate O'Neill cylinder pair with agristations one day- this was one of the first models I made, and it shows.

Incidentally my O'Neill pair is supposed to be used in conjunction with the agriring mesh-
this is what they look like together.
http://img66.imageshack.us/img66/4681/oneill7et.jpg

[Chuft-Captain]

I've just started working on a twin-cylinder model.
First attempt, but trying to make it as realistic as possible. Still a work in progress, but I'll try to put some screenshots up for you once I work out how. (this is my first post, so not sure how to attach jpgs to the message yet).

[ElChristou]

...but I'll try to put some screenshots up for you once I work out how. (this is my first post, so not sure how to attach jpgs to the message yet).

Have a look here:
http://www.shatters.net/forum/viewtopic.php?t=7565

Bye

[eburacum45]

I would be interested to see your version, Chuft-Captain; (nice name by the way).
I have tweaked my version a little; here is the result


I intend to eventually make a little bit of parkland to go inside the model as well (what would be nice would be a model with rotating cylinders, but that might be a little tricky)...

[Chuft-Captain]

ElChristou, thanks for the info on image linking.

Hope you guys like these images. I'm working on mirrors at the moment. No agriculture or industrial areas yet like your model erubacum45, but they do rotate!

[Chuft-Captain]

I''ve made a few refinements to my model. Mirrors are just a quick "tack on" at this point, but Ive tidied up the cylinder a lot. I'm trying to remain as faithful as possible in principle to the original G.K O'Neill concept.

Basic details are:
2 counter-rotating cylindrical habitats, each as follows:
3 valleys each of length: 20km, width: ~3.8km
Diameter 7.2km
Total length: ~ 27km
Shell thickness: ~50 to 100 meters (utilities, shielding, and underground transport to hub)
Rotation period: 2 minutes
Precession of ~1 degree per day (to track the sun) will be induced with a tensioning cable attached between the 2 hubs at one end. The 2 habitats rotate in opposing directions in order that they will precess in the same direction.

The 3 mirrors can operate on independent 8-hr offset cycles giving each valley a different timezone (offset by 8 hours), or alternatively on a synchronised cycle giving the same timezone for everyone living in the cylinder. The former would be the most likely arrangement in order that iindustry can operate round the clock.
Seasonal cycles between the habitats would be offset by 6 months to give year round choice of skiing, beach, boating activities, etc... to inhabitants of both habitats. This will also encourage mixing/socialising between the habitats.

Any feedback/comments/discussion would be appreciated.

Some pics showing progress:

[eburacum45]

Very interesting; and huge! I would be interested in the finished product, for a start.
It is a pity that Celestia doesn't support mirror-like reflections, as this would make the mirrors much more realistic. Myself I use a texture created from an image of silver paper, which is far from ideal.