Soyuz STB Fregat
Soyuz familyProgress Rocket Space CenterRetired
The 2.1b version adds an upgraded engine (RD-0124) with improved performance to the second stage. First launch took place from Plesetsk Cosmodrome Site 43 on 26 July 2008 with a classified military payload. The 2.1b/ST version is sometimes called Soyuz ST-B.
Specifications
- Thrust
- 4,146 kN
- Height
- 46.3 m
- Diameter
- 2.95 m
- Launch mass
- 312 t
- Stages
- 3
- LEO capacity
- 8,200 kg
- GTO capacity
- 3,250 kg
- SSO capacity
- 4,900 kg
Specifications from Launch Library. Figures the operator has not published are omitted.
Flight record
14flightswith a definitive outcome
92.9%success rate13 of 14
1failureincluding partial failures
11success streakcurrent
First flight October 21, 2011 · 10:30 UTC · latest February 10, 2022
Counted from padside's own launch record, the same basis as the stats page.
Flights per year
- Successful
- Failed
Show the numbers for Soyuz STB flights per year
| Year | Successful | Failed | Total |
|---|---|---|---|
| 2011 | 1 | 0 | 1 |
| 2012 | 0 | 0 | 0 |
| 2013 | 0 | 0 | 0 |
| 2014 | 2 | 1 | 3 |
| 2015 | 3 | 0 | 3 |
| 2016 | 1 | 0 | 1 |
| 2017 | 0 | 0 | 0 |
| 2018 | 1 | 0 | 1 |
| 2019 | 3 | 0 | 3 |
| 2020 | 0 | 0 | 0 |
| 2021 | 1 | 0 | 1 |
| 2022 | 1 | 0 | 1 |