RD-0211
Chemical Automatics Design Bureau (KBKhA) RD-0211 is a single-chamber nitrogen-tetroxide/UDMH companion engine for the Proton second stage, used as one tank-pressurization engine alongside three RD-0210 main engines. KBKhA reports 582.1 kN vacuum thrust per engine and 326.5 s vacuum specific impulse. RD-0211 was created by modernizing and redesignating RD-0209 for the three-stage Proton.
Identity
- Aliases
- RD-0211RD0211Proton second-stage RD-0211KBKhA RD-0211
- Domains
- spaceflight
- Identity Level
- variant
- Kind
- liquid-rocket-engine
- Name
- RD-0211
- Status
- active
Details
- Description
- Chemical Automatics Design Bureau (KBKhA) RD-0211 is a single-chamber nitrogen-tetroxide/UDMH companion engine for the Proton second stage, used as one tank-pressurization engine alongside three RD-0210 main engines. KBKhA reports 582.1 kN vacuum thrust per engine and 326.5 s vacuum specific impulse. RD-0211 was created by modernizing and redesignating RD-0209 for the three-stage Proton.
- Developers
- Lineage
- Note
- KBKhA states that RD-0209 was modernized and redesignated RD-0211 for the three-stage Proton.
- Related Propulsion System
- Relationship
- direct-derivative-of
- Sources
- Accessed Date
- 2026-07-29
- Publisher
- Chemical Automatics Design Bureau (KBKhA)
- Title
- Three RD0210 plus one RD0211 engine block
- Manufacturers
- Propellants
- nitrogen tetroxideUDMH
- Rocket Specs
- Chamber Count
- 1
- Vacuum Specific Impulse S
- 326.5
- Vacuum Thrust Kn
- 582.1
Links
Assets & Meta
- Creation Time
- July 29, 2026 at 11:40:25 UTC
- Updated Time
- August 22, 2026 at 07:51:15 UTC
Other
- Sources
- Accessed Date
- 2026-07-29
- Publisher
- Chemical Automatics Design Bureau (KBKhA)
- Title
- Scientific and Technical Complex
- Accessed Date
- 2026-07-29
- Publisher
- Chemical Automatics Design Bureau (KBKhA)
- Title
- Three RD0210 plus one RD0211 engine block
- Accessed Date
- 2026-07-29
- Note
- Supports the legacy vehicle installation and the narrow canonical identity used for migration.
- Publisher
- Official vehicle or program source
- Title
- Proton-K official vehicle reference
- Accessed Date
- 2026-07-29
- Note
- Supports the legacy vehicle installation and the narrow canonical identity used for migration.
- Publisher
- Official vehicle or program source
- Title
- Proton-M official vehicle reference