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<!-- '''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 [[Main_Page#You Can Help!|you can help!]]''' | <!-- '''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 [[Main_Page#You Can Help!|you can help!]]''' | ||
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*An offsite guide to Wiki formatting can be found [http://en.wikipedia.org/wiki/Help:Editing Here]. | *An offsite guide to Wiki formatting can be found [http://en.wikipedia.org/wiki/Help:Editing Here]. | ||
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Revision as of 00:00, 25 June 2012
| 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
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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)
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.
