https://en.bharatpedia.org/w/index.php?action=history&feed=atom&title=S139_BoosterS139 Booster - Revision history2026-10-24T14:20:23ZRevision history for this page on the wikiMediaWiki 1.43.6https://en.bharatpedia.org/w/index.php?title=S139_Booster&diff=258029&oldid=prev->Extorc: minor language improvements2021-12-14T18:31:35Z<p>minor language improvements</p>
<p><b>New page</b></p><div>{{Infobox rocket stage<br />
| image =<br />
| caption = The booster in manufacturing stage<br />
| name = S139<br />
| manufacturer = [[Satish Dhawan Space Center]]<br />
| country = [[India]]<br />
| rockets = [[GSLV]], [[PSLV]], [[Unified Launch Vehicle|ULV]] (Under Development)<br />
| propmass = 138 Tonnes<br />
| diameter = 2.8m<br />
| status = Active<br />
| first = Sep 20, 1993<br />
| last = Aug 12, 2021<br />
}}<br />
The '''S139''' ('''S''' for '''Solid''', '''139''' for weight of '''139''' tonnes) is a [[Solid Rocket Booster]] manufactured by the [[Indian Space Research Organization]] at the [[Satish Dhawan Space Center]] in the SPROB facility.<ref>{{Cite web|date=2018-11-29|title=ISRO to increase production of solid booster engines to make more powerful rockets- Technology News, Firstpost|url=https://www.firstpost.com/tech/science/isro-to-increase-production-of-solid-booster-engines-to-make-more-powerful-rockets-5640831.html|access-date=2021-08-09|website=Tech2}}</ref> The rocket motor was first developed for use in the [[Polar Satellite Launch Vehicle]]. Later it was utilized in the [[GSLV]] MKII. It uses [[hydroxyl-terminated polybutadiene]] (HTPB) as a propellant. It has a maximum thrust of 4800kN.<br />
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==Associated rockets==<br />
The S139 Booster has been used in 2 major [[ISRO]] rockets. <br />
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It is used in the [[PSLV]] as its core stage since 1993.<ref>{{Cite web|title=PSLV - ISRO|url=https://www.isro.gov.in/launchers/pslv|access-date=2021-08-11|website=www.isro.gov.in}}</ref><br />
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It is also used as a core stage in [[Geosynchronous Satellite Launch Vehicle]] MKII rocket.<ref>{{Cite web|title=GSLV - ISRO|url=https://www.isro.gov.in/launchers/gslv|access-date=2021-08-11|website=www.isro.gov.in}}</ref><br />
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It is also the part of a variant of the [[Unified Launch Vehicle]] which is under development.<ref>{{Cite web|title=ISRO Unified Launch Vehicle (ULV)|url=https://forum.nasaspaceflight.com/index.php?topic=31827.msg1047204#msg1047204|access-date=2021-08-11|website=forum.nasaspaceflight.com}}</ref><br />
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== Gallery ==<br />
<gallery widths="200" heights="200"><br />
File:PSLV C-35 at the launch pad (cropped).jpg|The Core stage of the PSLV is the S139 Booster<br />
File:Gslv-mk2 gsat-4 1.jpg|GLSV MK2 on Launch Pad<br />
</gallery><br />
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== References ==<br />
{{reflist}}<br />
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[[Category:Rocket stages]]<br />
[[Category:Satish Dhawan Space Centre]]<br />
[[Category:ISRO space launch vehicles]]<br />
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{{Rocket-stub}}<br />
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{{cat improve|date=August 2021}}</div>->Extorc