Soyuz ST-B/Fregat-MT
Soyuz ST-B/Fregat-MT was the higher-performance French Guiana launch configuration based on Soyuz-2.1b, adapted for the Guiana Space Centre and paired with the enlarged-propellant Fregat-MT upper stage. Arianespace operated the expendable configuration from the first Kourou Soyuz launch in 2011 through the final Soyuz flight from Europe's Spaceport in 2022.
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Identity
- Aliases
- Soyuz-ST-B/Fregat-MTSoyuz ST-B Fregat-MTSoyuz ST-BSoyuz-ST-BSoyuz 2.1b ST-B
- Family Name
- Soyuz ST
- Full Name
- Soyuz ST-B/Fregat-MT
- Status
- retired
- Type
- rocket
- Variant Name
- ST-B/Fregat-MT
Details
- Description
- Soyuz ST-B/Fregat-MT was the higher-performance French Guiana launch configuration based on Soyuz-2.1b, adapted for the Guiana Space Centre and paired with the enlarged-propellant Fregat-MT upper stage. Arianespace operated the expendable configuration from the first Kourou Soyuz launch in 2011 through the final Soyuz flight from Europe's Spaceport in 2022.
- First Flight Year
- 2,011
- Last Flight Year
- 2,022
- Operator
- Parent Vehicle Family
- Propulsion Configurations
- Entries
- Count
- 4
- Placement
- booster
- Propulsion System
- Role
- booster
- Stage
- first stage
- Variant Notes
- Four Soyuz Block B/V/G/D strap-on boosters, each with an RD-107A.
- Count
- 1
- Placement
- core
- Propulsion System
- Role
- main
- Stage
- second stage
- Variant Notes
- Block A core stage with one RD-108A.
- Count
- 1
- Placement
- upper
- Propulsion System
- Role
- upper-stage
- Stage
- third stage
- Variant Notes
- Soyuz-ST-B uses the higher-performance RD-0124 third-stage engine rather than the RD-0110 used by ST-A.
- Count
- 1
- Placement
- upper
- Propulsion System
- Role
- upper-stage
- Stage
- fourth stage
- Variant Notes
- Fregat-MT autonomous, restartable integrated upper-stage propulsion system; distinct from the lower three Soyuz stages.
- Name
- Soyuz ST-B/Fregat-MT exact configuration
- Notes
- The ST-B branch is kept distinct from Soyuz ST-A/Fregat and from the Soyuz-2.1b base sibling. ESA identifies four RD-107A strap-on boosters, one RD-108A core, the RD-0124 third stage, and the Fregat-MT upper composite; no generic R-7 family substitution is used.
- Rocket Specs
- Payload Capacity
- GTO
- …
- SSO
- …
- Reusability
- expendable
- Stages Count
- 4
- Strap On Boosters Count
- 4
Links
Assets & Meta
- Creation Time
- July 13, 2026 at 09:57:05 UTC
- Updated Time
- August 1, 2026 at 15:32:34 UTC
- Image
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