Roscosmos / Progress Rocket Space Centre · Operational · ru · Launch Vehicle
Soyuz-2
Russia's primary medium-lift workhorse in 2.1a and 2.1b sub-variants.
Verified 2026-09-24 · First flight 2004-11-08
Systems cutaway
Specs & Metrics
- Payload to LEO ↑ better
- 8,250 kg
- 2.1b variant from Baikonur; 2.1a delivers 7,020 kg
- Maximum payload mass deliverable to low Earth orbit (~200–400 km circular), in the vehicle's stated reference configuration.
- Liftoff Thrust ↑ better
- 4317 kN
- Total first-stage thrust at liftoff (sea-level), in kilonewtons, summing all active engines and solid strap-ons.
- Liftoff Mass ↓ better
- 312 t
- Total vehicle mass at liftoff including propellant, payload, and all stages, in metric tonnes.
- Vehicle Height ↓ better
- 46.3 m
- Full stack height at liftoff, in metres, including fairing or spacecraft.
- Mission Success Rate ↑ better
- 97.8%
- Soyuz-2.1a: 89 full successes, 1 failure, 1 partial failure in 91 launches through Soyuz MS-29 (2026-07-14); the source shows 98.4% by half-crediting the partial
- Percentage of launch attempts rated as full mission successes over the vehicle's complete flight history.