Aerojet AJ10-138 rocket engine
Aerojet's historical AJ10-138 was a pressure-fed, restartable storable-propellant engine used in Titan Transtage propulsion and adapted for Voyager work. NASA documents nitrogen tetroxide/Aerozine-50 propellants, multiple zero-gravity restarts, and two AJ10-138 engines mounted on a common Transtage frame producing 16,000 lbf combined vacuum thrust; this record does not collapse the two-engine installation into a single-engine performance claim.
Identity
- Aliases
- AJ10-138AJ 10-138AJ10-138 Transtage engine
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- Aerojet AJ10-138 rocket engine
- Status
- historical
Details
- Description
- Aerojet's historical AJ10-138 was a pressure-fed, restartable storable-propellant engine used in Titan Transtage propulsion and adapted for Voyager work. NASA documents nitrogen tetroxide/Aerozine-50 propellants, multiple zero-gravity restarts, and two AJ10-138 engines mounted on a common Transtage frame producing 16,000 lbf combined vacuum thrust; this record does not collapse the two-engine installation into a single-engine performance claim.
- Propellants
- nitrogen tetroxideAerozine-50
- Rocket Specs
- Cycle
- pressure-fed
- Restartable
- Yes
Links
Assets & Meta
- Creation Time
- August 15, 2026 at 05:34:44 UTC
- Updated Time
- August 15, 2026 at 05:34:44 UTC
Other
- Sources
- Accessed Date
- 2026-08-14
- Note
- NASA's Voyager Transtage study identifies two unmodified pressure-fed fixed-thrust AJ10-138 engines, their common-frame installation, combined 16,000 lbf vacuum thrust, and multiple zero-gravity restarts.
- Publisher
- NASA Technical Reports Server
- Title
- Voyager Spacecraft System Final Report
- Accessed Date
- 2026-08-14
- Note
- NASA's Titan III propulsion analysis identifies the Transtage as two AJ10-138 engines working in tandem and distinguishes their pressure-fed storable-liquid architecture from the LR87/LR91 stage engines.
- Publisher
- NASA Technical Reports Server
- Title
- Titan III Propulsion Systems