PS-4 liquid engine
ISRO PS-4 Earth-storable liquid engine used as a twin pair on PSLV’s fourth and final stage. ISRO specifies MMH/MON propellants and 7.3 kN maximum thrust per engine (14.6 kN per pair); exact PSLV variant configurations retain the stage role.
Identity
- Aliases
- PS4 liquid engine
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- PS-4 liquid engine
- Status
- active
Details
- Description
- ISRO PS-4 Earth-storable liquid engine used as a twin pair on PSLV’s fourth and final stage. ISRO specifies MMH/MON propellants and 7.3 kN maximum thrust per engine (14.6 kN per pair); exact PSLV variant configurations retain the stage role.
- Developers
- Manufacturers
- Propellants
- monomethylhydrazinemixed oxides of nitrogen
- Rocket Specs
- Vacuum Thrust Kn
- 7.3
Links
- Official Url
- https://www.isro.gov.in/ISRO_EN/PSLV_CON.html
Assets & Meta
- Creation Time
- July 29, 2026 at 08:58:44 UTC
- Updated Time
- August 14, 2026 at 23:02:33 UTC
Other
- Sources
- Accessed Date
- 2026-07-29
- Note
- Supports the legacy vehicle installation and the narrow canonical identity used for migration.
- Publisher
- Official vehicle or program source
- Title
- Polar Satellite Launch Vehicle QL official vehicle reference
- Accessed Date
- 2026-07-29
- Note
- Supports the legacy vehicle installation and the narrow canonical identity used for migration.
- Publisher
- Official vehicle or program source
- Title
- Polar Satellite Launch Vehicle G official vehicle reference
- Accessed Date
- 2026-07-29
- Publisher
- Indian Space Research Organisation
- Title
- PSLV-C54/EOS-06 Mission brochure