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
- —
- Height
- 46.3 m
- Diameter
- 2.95 m
- Launch mass
- 312 t
- Stages
- 3
- Launch cost
- —
- LEO capacity
- 8,200 kg
- GTO capacity
- 3,250 kg
- GEO capacity
- —
- SSO capacity
- 4,900 kg
Vehicle specifications from Launch Library; blanks are unpublished figures.
Flight record
Flights
14
Launches with a definitive outcome
Success rate
92.9%
13 of 14
Current success streak
11
Landings
0
0 attempts · 0 droneship / 0 RTLS
Fastest turnaround
—
Between consecutive booster flights
Counted from padside's own launch record — the same basis as the Stats page.
Launches
- Soyuz STB/Fregat | OneWeb 13 — Success
- Soyuz STB/Fregat | Galileo L11 (FOC FM23-FM24) — Success
- Soyuz STB/Fregat | CSG-1, CHEOPS, & others — Success
- Soyuz STB/Fregat | O3b FM17-20 — Success
- Soyuz STB/Fregat | OneWeb 1 (F6) — Success