RD-0109
Chemical Automatics Design Bureau (KBKhA) RD-0109 is a single-chamber liquid-oxygen/kerosene engine for the reliable Block E third stage of Vostok launch vehicles, developed from RD-0105 with a new chamber and improved performance and reliability. KBKhA reports 5.56 metric-ton-force (approximately 54.5 kN) vacuum thrust and 323.5 s vacuum specific impulse. The standard engine first flew on 1960-12-22; a 1960 production engine later launched the Vostok spacecraft carrying Yuri Gagarin on 1961-04-12.
Identity
- Aliases
- RD-0109RD0109Vostok Block E RD-0109KBKhA RD-0109
- Domains
- spaceflight
- Identity Level
- variant
- Kind
- liquid-rocket-engine
- Name
- RD-0109
- Status
- retired
Details
- Description
- Chemical Automatics Design Bureau (KBKhA) RD-0109 is a single-chamber liquid-oxygen/kerosene engine for the reliable Block E third stage of Vostok launch vehicles, developed from RD-0105 with a new chamber and improved performance and reliability. KBKhA reports 5.56 metric-ton-force (approximately 54.5 kN) vacuum thrust and 323.5 s vacuum specific impulse. The standard engine first flew on 1960-12-22; a 1960 production engine later launched the Vostok spacecraft carrying Yuri Gagarin on 1961-04-12.
- Developers
- First Flight Date
- 1960-12-22
- Lineage
- Note
- KBKhA states that RD-0109 was developed directly from RD-0105 with a new chamber and improved performance and reliability.
- Related Propulsion System
- Relationship
- direct-derivative-of
- Sources
- Accessed Date
- 2026-07-29
- Publisher
- Chemical Automatics Design Bureau (KBKhA)
- Title
- RD0109
- Manufacturers
- Propellants
- keroseneliquid oxygen
- Rocket Specs
- Chamber Count
- 1
- Vacuum Specific Impulse S
- 323.5
- Vacuum Thrust Kn
- 54.53
Links
Assets & Meta
- Creation Time
- July 29, 2026 at 11:38:33 UTC
- Updated Time
- August 22, 2026 at 07:44:51 UTC
Other
- Sources
- Accessed Date
- 2026-07-29
- Publisher
- Chemical Automatics Design Bureau (KBKhA)
- Title
- RD0109
- 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
- Vostok-K 8K72K Launch Vehicle official vehicle reference