RD-0209
Chemical Automatics Design Bureau (KBKhA) RD-0209 is a single-chamber nitrogen-tetroxide/UDMH companion engine for tank pressurization on the original Proton second stage. The UR-500 second-stage block used one RD-0209 alongside three RD-0208 main engines. The recorded configuration has 569.7 kN vacuum thrust and 326 s vacuum specific impulse per engine, with the RD-0209 serving the tank-pressurization role.
Identity
- Aliases
- RD-0209RD0209Proton second-stage RD-0209KBKhA RD-0209
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- RD-0209
- Status
- retired
Details
- Description
- Chemical Automatics Design Bureau (KBKhA) RD-0209 is a single-chamber nitrogen-tetroxide/UDMH companion engine for tank pressurization on the original Proton second stage. The UR-500 second-stage block used one RD-0209 alongside three RD-0208 main engines. The recorded configuration has 569.7 kN vacuum thrust and 326 s vacuum specific impulse per engine, with the RD-0209 serving the tank-pressurization role.
- Developers
- Manufacturers
- Propellants
- nitrogen tetroxideUDMH
- Rocket Specs
- Chamber Count
- 1
- Vacuum Specific Impulse S
- 326
- Vacuum Thrust Kn
- 569.7
Links
Assets & Meta
- Creation Time
- July 29, 2026 at 11:40:19 UTC
- Updated Time
- August 22, 2026 at 07:50:27 UTC
Other
- Sources
- Accessed Date
- 2026-07-29
- Publisher
- Chemical Automatics Design Bureau (KBKhA)
- Title
- Three RD0208 plus one RD0209 engine block