The O'Neill Cylinder

[HoloYolo]

http://en.wikipedia.org/wiki/O%27Neill_cylinder /Read up if you don't know what this is. Let's put a fictional setting into place. Kerbin will be destroyed. The reason, a black hole (this is so extremely rare, impossible in the game, but just roll with it). The black hole is 5 years out (ignore the fact the black hole would've destroyed Eeloo already), and your mission is to build an O'Neill Cylinder a.k.a Island, then escape to one of the 3 places that'll survive, then land and set up a colony. Here is the layout, now the rules.

The "Island" building guide

1. Must be 20 meters long and 5 meters wide.

2. It can be driven along by normal rockets, but making an Orion propulsion system that works would be amazing

2. It must hold 50 kerbals

3. Must have a colony of 10 kerbals to land on target.

4. Must have gravity relatable to Kerbin (9.81 m.s. squared, has to be made with centrifuge system)

5. Must have a 6 hour day-night cycle

Here are the 3 targets

Dres

Moho

Pol

Here are the rules

1. The only mods allowed are Infernal Robotics, visuals, and Info, but if the cylinder is too heavy for the stock rockets, use KW Rocketry or something similar for ORBIT ONLY

2. Remember that the black hole will destroy all but the 3 targets, don't land on Laythe and say you completed the challenge, as it will be destroyed.

3. The cylinder is allowed to be assembled in LKO

4. You can only set up shop at the 3 targets.

5. You can ferry the 50 kerbals to the cylinder in LKO

6. When you leave Kerbin, you're not coming back, so no gravity assists.

7. No refueling, Kerbin will be destroyed.

8. Have fun

Achoo! (Pol)

1

2

3

Lonely Space Potato (Dres)

1

2

3

Meatball! (Moho)

1

2

3

Scoring by fastest colony set-up, which means from fully-assembled cylinder, to colony touchdown on one of three targets.

Edited April 11, 2015 by HoloYolo

[HoloYolo]

Did I do something wrong?

[HoloYolo]

If I'm getting no replies is it a bad challenge.

[fire219]

I wouldn't say it's a bad challenge, it just would be hard and not that rewarding.

[smjjames]

Give it a day or two maybe?

[Slam_Jones]

You gotta remember that with challenges like this, folks will need time for the whole build/test cycle. And with something this big, that cycle might take a while.

[Tex_NL]

... And with something this big, that cycle might take a while.

And in the mean time Kaboom, you might want to start working on YOUR solution. If you show what you've come up with people are a lot more willing to try.

[HoloYolo]

And in the mean time Kaboom, you might want to start working on YOUR solution. If you show what you've come up with people are a lot more willing to try.

LOL I always forget XD.

[kStrout]

just remember, it has to be a double cylinder design with parallel, counter-rotating cylinders or otherwise it will be unstable (and if KSP used real physics) end up tumbling end over end. This works: this doesn't:

[HoloYolo]

just remember, it has to be a double cylinder design with parallel, counter-rotating cylinders or otherwise it will be unstable (and if KSP used real physics) end up tumbling end over end. This works: http://www.orionsarm.com/im_store/cneill.JPGthis doesn't: http://ssi.org/assets/images/Ch05p066.gif

So what you're saying is that everyone who tries this has to make 2 cylinders?

[smjjames]

Kaboom, maybe you should make one to see if it's doable with stock? You have a lot of requirements there.

[hoioh]

Infernal Robotics would be a great asset making this thing rotate and counterrotate, doing that with stock parts means you have to make your rotations using small motors or monoprop and putting it on an axle made with a bunch of wheels on a (couple of) tank(s). Whereas with IR you can use the free moving docking washers with a motor or just use a rotating hub that responds to a button press. Then make the second cylinder with the buttons reversed so they always counter-spin.

Anyway, since it's big and requires these unpredictable stock axes, it's going to bug out and break a lot.

I'm only doing it with IR allowed, otherwise it's just messy.

[kStrout]

So what you're saying is that everyone who tries this has to make 2 cylinders?

if you want to be realistic, yes. Making the diameter greater than the length with just 1 cylinder is also stable. Your challenge, your decision, this is just some stuff to think about.

[Kerbart]

I vaguely remember seeing on youtube that creating artificial gravity this way only works with vehicles, but not with Kerbals for some reason. But I might be wrong.

[HoloYolo]

I vaguely remember seeing on youtube that creating artificial gravity this way only works with vehicles, but not with Kerbals for some reason. But I might be wrong.

It does, it's just for simulation though.

[Fengist]

This is the only artificial gravity attempt I've seen and it didn't work so well.

Edited April 11, 2015 by Fengist

[kerbiloid]

Several Stanford toruses

http://forum.kerbalspaceprogram.com/threads/84106-0-90-Stanford-Torus-0-6

surely make a cylinder: 2 km in diameter and up to physical range in length.