📊 Analysis
Statistics & insights on rockets and organizations — technology, history, numbers.
Soyuz STB Fregat
RetiredProgress Rocket Space Center
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.
Key figures
Total launches
14
Successes
13
Failures
1
Success rate
92.9 %
Success streak
11
Maiden flight
Oct 21, 2011
Reusable
No
Shortest launch interval ⓘ
35d 19h
Planned launches
0
Soyuz, Soyuz 2 family total
206 launches · 199 successes · 7 failures (13 variants)
🧐 Data check
Automatic plausibility checks — anomalies are surfaced transparently here:
- ℹ️The figures above apply only to the “Soyuz STB Fregat” variant. The Launch Library counts each variant separately — the Soyuz, Soyuz 2 family totals 206 launches across 13 variants.
Technology
Length
46.3 m
Diameter
2.95 m
Launch mass
312 t
Stages
3
LEO (low Earth orbit)
8,200 kg
GTO (geo transfer)
3,250 kg
SSO (sun-synchronous)
4,900 kg
Engines & propellant
| Boosters | 4× RD-107A | Kerosin / Flüssigsauerstoff |
| 1st stage | 1× RD-108A (Zentralblock) | Kerosin / Flüssigsauerstoff |
| 2nd stage | RD-0110 / RD-0124 | Kerosin / Flüssigsauerstoff |
| Kick stage | Fregat (optional) | UDMH / Stickstofftetroxid |
Engine and propellant data from curated sources: Wikipedia — Sojus (Rakete)
Launches per year
of which in our database: 14
Successes Failures Other/planned
History & events
Sources
- Launch Library 2 (The Space Devs)
- Wikipedia