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S139 Booster 
Summary
The S139 (S for Solid, 139 for weight of 139 tonnes) is a Solid Rocket Booster manufactured by the Indian Space Research Organisation at the Satish Dhawan Space Centre in the SPROB facility.[1] The rocket motor was first developed for use in the Polar Satellite Launch Vehicle. Later it was utilised in the GSLV MKII. It uses hydroxyl-terminated polybutadiene (HTPB) as a propellant. It has a maximum thrust of 4800 kN.
| Manufacturer | Satish Dhawan Space Centre |
|---|---|
| Country of origin | India |
| Used on | GSLV and PSLV |
| General characteristics | |
| Diameter | 2.8m |
| Propellant mass | 138 tonnes |
| Launch history | |
| Status | Active |
| First flight | Sep 20, 1993 |
| Last flight | Jul 30, 2023 |
Associated rockets edit
The S139 Booster has been used in 2 major ISRO rockets.
It is used in the PSLV as its core stage since 1993.[2]
It is also used as a core stage in Geosynchronous Satellite Launch Vehicle MKII rocket.[3]
It is also the part of a variant of the Unified Launch Vehicle which is under development.[4]
Gallery edit
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The Core stage of the PSLV is the S139 Booster
References edit
- ^ "ISRO to increase production of solid booster engines to make more powerful rockets". Tech2. 2018-11-29. Retrieved 2021-08-09.
- ^ "PSLV - ISRO". www.isro.gov.in. Archived from the original on 2019-03-23. Retrieved 2021-08-11.
- ^ "GSLV - ISRO". www.isro.gov.in. Archived from the original on 2019-06-21. Retrieved 2021-08-11.
- ^ "ISRO Unified Launch Vehicle (ULV)". forum.nasaspaceflight.com. Retrieved 2021-08-11.