Fregat-MT upper stage
The upgraded, restartable Fregat-MT integrated upper-stage propulsion system used above the three-stage Soyuz ST-B launcher for high-energy and multi-satellite missions.
Identity
- Aliases
- Fregat-MTFregat MT
- Domains
- spaceflight
- Identity Level
- integrated-system
- Kind
- integrated-propulsion-system
- Name
- Fregat-MT upper stage
- Status
- unknown
Details
- Description
- The upgraded, restartable Fregat-MT integrated upper-stage propulsion system used above the three-stage Soyuz ST-B launcher for high-energy and multi-satellite missions.
- Developers
- Manufacturers
- Propellants
- unsymmetrical dimethylhydrazinenitrogen tetroxide
Links
Assets & Meta
- Creation Time
- August 1, 2026 at 15:32:13 UTC
- Updated Time
- August 1, 2026 at 15:32:13 UTC
Other
- Sources
- Accessed Date
- 2026-08-01
- Note
- ESA identifies the exact Soyuz ST-B/Fregat-MT combination, calls Fregat-MT an upgraded Fregat upper stage, and records its additional propellant load.
- Publisher
- European Space Agency
- Title
- Galileo's Soyuz launchers arrive at French Guiana
- Accessed Date
- 2026-08-01
- Note
- ESA documents NPO Lavotchkin as Fregat designer/manufacturer and describes the Fregat storable-propellant reignitable upper stage above the three Soyuz stages.
- Publisher
- European Space Agency
- Title
- Soyuz
- Accessed Date
- 2026-08-01
- Note
- ESA describes Soyuz-Fregat as a four-stage launch vehicle with an autonomous, restartable Fregat upper stage using storable propellants.
- Publisher
- European Space Agency
- Title
- Soyuz-Fregat launch vehicle