# DemoSat

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{{Short description|Satellite mock-up}}
[[Image:Demosat with 3CSat.jpg|thumb|Demosat-Payload on the first [Delta IV](/source/Delta_IV)-Heavy rocket]]
A '''DemoSat''' is a [boilerplate](/source/Boilerplate_(spaceflight)) spacecraft used to test a [carrier rocket](/source/carrier_rocket) without risking a real satellite on the launch. They are most commonly flown on the maiden flights of rockets, but have also been flown on return-to-flight missions after launch failures. Defunct satellites from cancelled programmes may be flown as DemoSats, for example the maiden flight of the [Soyuz-2](/source/Soyuz-2) rocket placed an obsolete [Zenit-8](/source/Zenit_(satellite)) satellite onto a [sub-orbital](/source/sub-orbital) trajectory in order to test the rocket's performance.<ref>[http://www.astronautix.com/lvs/soyuz.htm#2004-U01 Soyuz-ST - Encyclopedia Astronautica] {{webarchive|url=https://web.archive.org/web/20100107163113/http://astronautix.com/lvs/soyuz.htm |date=2010-01-07 }}</ref>

==See also==
*[Boilerplate (spaceflight)](/source/Boilerplate_(spaceflight))

==References==
{{reflist}}

{{Use British English|date=January 2014}}

Category:Satellites by type
Category:Dummy payloads

{{spacecraft-stub}}

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Adapted from the Wikipedia article [DemoSat](https://en.wikipedia.org/wiki/DemoSat) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/DemoSat?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.