LR-105-NA-7
Rocketdyne LR-105-NA-7 is the Atlas MA-5 sustainer-engine variant, remaining attached after booster-section staging. NASA identifies the MA-5 propulsion system as two YLR-89 booster engines paired with one Rocketdyne YLR-105 sustainer producing 266,880 N; this record isolates the LR-105-NA-7 sustainer while preserving its RP-1/liquid-oxygen identity.
Identity
- Domains
- spaceflight
- Identity Level
- variant
- Kind
- liquid-rocket-engine
- Name
- LR-105-NA-7
- Status
- historical
Details
- Description
- Rocketdyne LR-105-NA-7 is the Atlas MA-5 sustainer-engine variant, remaining attached after booster-section staging. NASA identifies the MA-5 propulsion system as two YLR-89 booster engines paired with one Rocketdyne YLR-105 sustainer producing 266,880 N; this record isolates the LR-105-NA-7 sustainer while preserving its RP-1/liquid-oxygen identity.
- Developers
- Family
- Manufacturers
- Propellants
- RP-1liquid oxygen
- Rocket Specs
- Chamber Count
- 1
- Sea Level Thrust Kn
- 266.9
Links
Assets & Meta
- Creation Time
- July 29, 2026 at 09:34:32 UTC
- Updated Time
- August 22, 2026 at 06:32:23 UTC
Other
- Sources
- Accessed Date
- 2026-07-29
- Publisher
- NASA Technical Reports Server
- Title
- NASA Agena D mission capabilities
- Accessed Date
- 2026-07-29
- Publisher
- NASA Technical Reports Server
- Title
- NASA Historical Data Book: Atlas launch vehicle characteristics
- 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 I official vehicle reference
- Accessed Date
- 2026-08-21
- Note
- NASA identifies the Atlas MA-5 propulsion system as two YLR-89 booster engines paired with one Rocketdyne YLR-105 sustainer producing 266,880 N; this supports the LR-105-NA-7 sustainer identity and per-engine thrust.
- Publisher
- NASA
- Title
- NASA Historical Data Book, Volume II