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  1. - Top - End - #1
    Dwarf in the Playground
     
    PaladinGuy

    Join Date
    Jul 2019

    Default McKendree cylinder

    A McKendree cylinder is a rotating cylindrical space habitat comparable to the more well known O'Neill model. It was proposed by NASA engineer Thomas McKendree in 2000 as an update of O'Neill's, using carbon nanotubes instead of steel and aluminu to allow for much larger structures - up to 10,000km long/1,000km radius, compared to O'Neill's 32km length/8km radius.

    It is the year 2600 AD, this McKendree cylinder is what's called a generation starship, it left the vicinity of Earth in the early 2130 AD and has been cruising to Alpha Centauri for 470 years. On this starship humans have lived for many generations so what should we put on this starship? What would make a good setting for an rpg?

  2. - Top - End - #2
    Ogre in the Playground
     
    HalflingPirate

    Join Date
    Nov 2011

    Default Re: McKendree cylinder

    Politics comes to mind.

    Have you read Heinlein's Orphans of the Sky?

    Introducing strange aliens might work, but how about GMO rats? Humans should know better than to play with DNA!

    An idea:
    Dr. Rdrdrdr, a genetically enhanced raccoon genetecist, is friendly with humans who are now fighting for survival as their lab experiments gain intelligence. Now for the twist: Dr. Rdrdrdr wants to keep some humans as pets as he uses them as cannon fodder to consolidate his position at the top of the food chsin.
    Last edited by brian 333; 2019-12-14 at 04:19 PM.

  3. - Top - End - #3
    Dwarf in the Playground
     
    PaladinGuy

    Join Date
    Jul 2019

    Default Re: McKendree cylinder

    Quote Originally Posted by brian 333 View Post
    Politics comes to mind.

    Have you read Heinlein's Orphans of the Sky?

    Introducing strange aliens might work, but how about GMO rats? Humans should know better than to play with DNA!

    An idea:
    Dr. Rdrdrdr, a genetically enhanced raccoon genetecist, is friendly with humans who are now fighting for survival as their lab experiments gain intelligence. Now for the twist: Dr. Rdrdrdr wants to keep some humans as pets as he uses them as cannon fodder to consolidate his position at the top of the food chsin.
    Perhaps a map would be a good start. The cylinder is 10,000 kilometers long and 2,000 kilometers wide. If you unroll it, this creates a map that shows a landscape 10,000 km by 6,283 km, or 6,250 miles by 3,927 miles. By convention, the direction the cylinder spins in is west, to the right of west is north, to the left is south, and opposite of west is east. The north end is cold the south is warm, so every 70 miles traveled from the north endcap to the south is the equivalent of traveling 1 degree from north to south from the north pole to the equator. So within this cylinder we have the full range of Earth climates from the north pole to the equator.

    Perhaps we could make this a Traveller T20 setting. The characters start out as Barbarians. The technology level is the same as Dungeons & Dragons 3.5, but there are artifacts of a higher technology level. The starship is nearing its destination as the campaign begins.

  4. - Top - End - #4
    Ogre in the Playground
     
    HalflingPirate

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    Nov 2011

    Default Re: McKendree cylinder

    Powered by a fusion ramjet, the fuel collected by the magnetic ramscoop travels through a tube down the axis of the ship growing hotter as it compresses, so that the tube glows and provides heat. At the North end it is dull red and only 500F, but at the south end the external skin of the tube exceeds 5000F. Of course. Aft of that is the fusion jet and the radiation shielding and thermal and light converters that generate electricity.

  5. - Top - End - #5
    Ettin in the Playground
     
    Bohandas's Avatar

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    Feb 2016

    Default Re: McKendree cylinder

    Quote Originally Posted by brian 333 View Post
    Politics comes to mind.

    Have you read Heinlein's Orphans of the Sky?
    That's the one where the ship is run by a cargo cult, right?

  6. - Top - End - #6
    Firbolg in the Playground
    Join Date
    Sep 2014

    Default Re: McKendree cylinder

    Anyone interested in this concept should look at Generation Ship by Aaron Griffen. It's a Powered by the Apocalypse system that overlays the Legacy: Life Among the Ruins hack. It gives you exactly what you want with this. The book is published by Morpheius Press and there's another Legacy: Life Among the Ruins book called Wonderfall that lets you run the start of a new interstellar civilization.
    Last edited by Razade; 2019-12-18 at 05:14 AM.

  7. - Top - End - #7
    Dwarf in the Playground
     
    PaladinGuy

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    Jul 2019

    Default Re: McKendree cylinder

    Quote Originally Posted by Razade View Post
    Anyone interested in this concept should look at Generation Ship by Aaron Griffen. It's a Powered by the Apocalypse system that overlays the Legacy: Life Among the Ruins hack. It gives you exactly what you want with this. The book is published by Morpheius Press and there's another Legacy: Life Among the Ruins book called Wonderfall that lets you run the start of a new interstellar civilization.
    The Starship is not in ruins exactly, basically the humans started the voyage as primitives, so they would not gain the ability to destroy the starship while it is enroute, or otherwise cause serious damage to it. Now that they are approaching the end of the journey, their technology needs to be brought up.

    The idea is that humans can be very unpredictable, and that four hundred years of human history would occur on this starship during the voyage to Alpha Centauri. So the initial colonists volunteered to raise their children as primitives, so they started at a medieval level of technology. One of the reasons they left Earth were things were starting to get scary there, so they got a reliable AI to run the ship, it controls the robots that do the maintenance and upkeep of the ship and its life support system, but it otherwise does not interfere with human affairs onboard. The humans living onboard do not see the innerworkings of the ship as that goes on underground below their feet or in the unreachable sky. The landscape around them arreas natural, their are mountains and trees, lakes and seas, towards one end of the cylinder it gets cold, that is referred to as the north, the opposite end is warm and that is the south. As one gets to the endcaps, the landscape curves upward and the air thins out with altitude, until it becomes unbreathable to humans.

    There are caves and tunnels, lets call it the dungeon which provides access to the ships controls and technology, there are a bunch of pseudo monsters guarding these lairs, actually biological robots. This provides the challenge to adventurers trying to gain control of the starship, not necessarily to stop them, but to test their mettle.

  8. - Top - End - #8
    Firbolg in the Playground
    Join Date
    Sep 2014

    Default Re: McKendree cylinder

    Generation Ship doesn't have the ship in ruins either. The system it's based off is merely called Legacy: Life Among the Ruins. You should look into it, as it seems to do what you want to do easily and can even more easily be flavored to how you want it.

  9. - Top - End - #9
    Dwarf in the Playground
     
    PaladinGuy

    Join Date
    Jul 2019

    Default Re: McKendree cylinder

    Quote Originally Posted by Razade View Post
    Generation Ship doesn't have the ship in ruins either. The system it's based off is merely called Legacy: Life Among the Ruins. You should look into it, as it seems to do what you want to do easily and can even more easily be flavored to how you want it.
    I'm not much on buying a new RPG for every scenario, I'm not that rich.

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