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Welcome to Lunarpedia!
A resource for reaching our stepping stone to the Solar System.
Statistics: 904 articles | 428 uploads | 14 administrators

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NOTICE: All articles in the main namespace are released to the Public Domain and
may be used for any purpose without entangling restrictions. DO NOT add any
content to these pages that you do not wish to release to the public domain
and/or lack the authority to release to the public domain! Articles controlled
by the GNU FDL should be imported with full revision histories to the GFDL:
namespace. For example, the [[Crater chain]] article from Wikipedia would need
to be implemented as [[GFDL:Crater chain]] here. A tutorial is available.
Articles meant to require attribution to Lunarpedia.org under the terms of
Creative Commons must be placed in the CC_Luna: namespace (for example, [[CC
Luna:Crater chain]].


LUNARPEDIA'S SISTER SITES

 * Spacepedia - a general space wiki
 * Marspedia - a Mars wiki
 * Exodictionary - a space dictionary

Lunarpedia's mission is to cover everything we will need to know how to do on
Luna (the Earth's moon) to set up self-sustaining bases and colonies, as well as
related efforts, designs, and business models that may eventually lead there.
Construction is always ongoing and you can help!

Are you new to Lunarpedia? Start here!


FEATURED ARTICLE: EDDY CURRENT BRAKE TO ORBIT | 24 OCTOBER 2019



This device is the central feature of a spacecraft carrier that receives
spacecraft into orbit as an aircraft carrier receives aircraft that land on its
deck. It works by having a long slotted aluminum tube in orbit and having the
shuttle vehicle that is launched to orbital altitude enter this slot while the
tube is moving by at orbital speed. The shuttle only needs to reach orbital
altitude to enter the eddy current brake tube. That can be 10 kilometers on Luna
at the perilune, an altitude that can be reached with 188 meters per second
mission delta v, including gravity loss, a few seconds maneuvering fuel, and a
small safety margin. Magnetic flux from permanent magnets deployed by the
shuttle is directed at the walls of the tube causing a repulsive force and a
retarding force.[1][2] By reducing the speed of the shuttle relative to the
orbiting aluminum tube, the shuttle is brought up to near orbital speed. Since
eddy current braking loses effectiveness at low relative speeds, friction
braking is used to give the shuttle the last 18 meters per second to reach
orbital speed and match velocity with the aluminum tube. During all the time
that the relative speed of the shuttle and the aluminum tube is greater than 18
meters per second, there is no contact between the material of the shuttle and
the material of the aluminum tube. ...(read more)

See all featured articles | Nominate!


YOU CAN HELP!

 * Find an identified needed article with a red link, click here for a list of
   missing but linked to articles, or create your article by typing in the topic
   name in the URL (such as
   http://www.marspedia.org/index.php?title=articlename.)

 * Refine an article stub into something more complete.

 * Or simply tidy up an article in this category.

 * An offsite guide to Wiki formatting can be found Here.


NEW USERS START HERE!

 * Lunarpedia QuickStart - To browse the current articles.
   Category Tree - To overview the current categories of articles.

 * Contact The Lunarpedia Team (email "lunarpedia at moonsociety dot org") to
   request a new account.

 * You can click on your user name and create a user page to tell us about
   yourself.

 * If you have questions or comments about any page then click on the
   "discussion" tab and type in the edit box. Make sure to sign all talk page
   discussion with a row of four tilda characters (eg. to sign your name type:
   ~~~~).


HOW TO LAYOUT YOUR PAGES

 * You can download a very useful one page Wiki Reference Card as a PDF.

 * Or a less comprehensive, but much nicer looking, single page Wikipedia
   Cheatsheet, also as a PDF.

 * Or an easy-to-dig page of wiki examples is at Wikitext Examples

These files are best saved to your hard drive and also printed. Right click and
"Save Link As" to do that. Or, if you have the plugins installed you can just
click and view in your browser. But please don't forget to come back here
afterwards :-)


SIGNING YOUR COMMENTS

When you add comments to User_talk pages, please sign using <BR/>-- ~~~~, this
automatically adds your signature and a time and date stamp in UTC like so:
-- MikeD 09:15, 18 May 2007 (UTC)

Anonymous users (those not logged in) should also sign with some sort of ID,
like for instance <BR/>-- JoeBloggs ~~~~~ which would result in something like
the following:
-- JoeBloggs 09:15, 18 May 2007 (UTC)


ABOUT LUNARPEDIA

 * Original research is allowed and encouraged
 * On topic is our concern, not notability
 * We're not concerned about encyclopedic neutrality
 * On topic commercial articles are welcome

 1. ↑ Eddy current brake at Wikipedia
 2. ↑ Inductrack at Wikipedia

Retrieved from "https://lunarpedia.org/index.php?title=Home&oldid=115964"
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 * This page was last edited on 24 June 2019, at 13:38.

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