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→Deployment Mechanisms
=== Paraffin release mechanism ===
This mechanism uses the property of paraffin wax to expand greatly on heating it. This causes it to compress a cylindrical casing which holds a pin initially. As the casing (made of polymer) gets squeezed it releases the pin, slowly triggering the deployment
==== Advantages ====
==== Disadvantages ====
Slow deployment, spontaneous trigger at elevated temperature
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More information can be found [http://www.vernatherm.com/thermal_actuators.html here].
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==Deployment Mechanisms ==
Here are some commonly used mechanisms:
* '''Coilable Mast:''' This an important mechanism for deployment of structures such as antennas. The mast is flexible in nature and coiled on a reel to reduce the dimension during launch. A good image can be found [https://www.jpl.nasa.gov/nmp/st8/tech/sailmast_tech3.html here].
* '''Lazy Tongs:''' The actual definition for this being scissor-like extendable structure used to reach things at a distance. These type of structures are employed when space constraints are imposed on one dimension of structures.
[[File:LazyTongsLazyTongs2.png|frame|center|Lazy TongsA representative image for lazy tongs. Image reproduced from [https://www.flickr.com/photos/internetarchivebookimages/14742323506 here]]]
* '''Telescopic:''' This mechanism uses compression of a long structure into smaller structure by sliding one part into another.
[[File:TelescopicTelescopic2.png|framethumb|center|400px|Telescopic]]* '''Foldable Mast:''' The structure of the mast is broken into smaller parts of the shape of a triangle and connected with the help of plastic flexible hinges to stiffen the folded structure once deployed.Good images can be found [[Filehttp:FoldableMast//mechanismsrobotics.png|thumb|250px|Foldable Mast]asmedigitalcollection.asme.org/article.aspx?articleid=2474215 here].
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