RS-56SA
The single-chamber Rocketdyne sustainer engine identified by NASA for Atlas II's MA-5A propulsion system.
Identity
- Aliases
- MA-5A sustainer engine
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- RS-56SA
- Status
- retired
Details
- Description
- The single-chamber Rocketdyne sustainer engine identified by NASA for Atlas II's MA-5A propulsion system.
- Developers
- Manufacturers
- Propellants
- RP-1liquid oxygen
- Rocket Specs
- Chamber Count
- 1
- Sea Level Thrust Kn
- 269
Links
Assets & Meta
- Creation Time
- July 29, 2026 at 11:09:05 UTC
- Updated Time
- July 29, 2026 at 11:09:05 UTC
Other
- Sources
- Accessed Date
- 2026-07-29
- Publisher
- Lockheed Martin
- Title
- Atlas Launch System Mission Planner's Guide, Revision 7
- 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
- Atlas IIAS official vehicle reference