Aerojet LR91-AJ-11 rocket engine
Aerojet's historical LR91-AJ-11 was the single-chamber, gas-generator storable-propellant engine for Titan III and Titan IV second stages. NASA documents nitrogen tetroxide/Aerozine-50 propellants, 467,040 N (about 467.04 kN) maximum thrust, 316 s specific impulse, and a 247 s maximum firing lifetime; this record keeps the historical Titan application without inferring a current lifecycle or vehicle relationship.
Identity
- Aliases
- LR91-AJ-11LR91-AJ-11 engineLR91-AJ-11 Titan engine
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- Aerojet LR91-AJ-11 rocket engine
- Status
- historical
Details
- Description
- Aerojet's historical LR91-AJ-11 was the single-chamber, gas-generator storable-propellant engine for Titan III and Titan IV second stages. NASA documents nitrogen tetroxide/Aerozine-50 propellants, 467,040 N (about 467.04 kN) maximum thrust, 316 s specific impulse, and a 247 s maximum firing lifetime; this record keeps the historical Titan application without inferring a current lifecycle or vehicle relationship.
- Propellants
- nitrogen tetroxideAerozine-50
- Rocket Specs
- Chamber Count
- 1
- Cycle
- gas generator
- Vacuum Specific Impulse S
- 316
- Vacuum Thrust Kn
- 467.04
Links
Assets & Meta
- Creation Time
- August 15, 2026 at 05:33:16 UTC
- Updated Time
- August 15, 2026 at 05:33:16 UTC
Other
- Sources
- Accessed Date
- 2026-08-14
- Note
- NASA's Titan III propulsion analysis identifies the exact LR91-AJ-11 second-stage engine, its single-engine architecture, N2O4/Aerozine-50 propellants, 467,040 N maximum thrust, 316 s specific impulse, and 247 s maximum firing lifetime.
- Publisher
- NASA Technical Reports Server
- Title
- Titan III Propulsion Systems
- Accessed Date
- 2026-08-14
- Note
- NASA's Titan launch-vehicle propulsion memorandum distinguishes the LR91-AJ-11 single second-stage engine from the twin LR87-AJ-11 first-stage assembly and documents the Titan application.
- Publisher
- NASA Technical Reports Server
- Title
- Titan III Launch Vehicle Propulsion System