Aerojet LR87-AJ-11 rocket engine
Aerojet's historical LR87-AJ-11 was the twin-subassembly, gas-generator storable-propellant engine assembly used on Titan III and Titan IV first stages. NASA documents two identical thrust-chamber subassemblies operating simultaneously on nitrogen tetroxide and Aerozine-50, with a vacuum-rated assembly thrust of 520,000 lbf (approximately 2,313 kN); this record does not infer a current lifecycle or vehicle relationship beyond the documented Titan application.
Identity
- Aliases
- LR87-AJ-11LR87-AJ-11 engineLR87-AJ-11 Titan engine
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- Aerojet LR87-AJ-11 rocket engine
- Status
- historical
Details
- Description
- Aerojet's historical LR87-AJ-11 was the twin-subassembly, gas-generator storable-propellant engine assembly used on Titan III and Titan IV first stages. NASA documents two identical thrust-chamber subassemblies operating simultaneously on nitrogen tetroxide and Aerozine-50, with a vacuum-rated assembly thrust of 520,000 lbf (approximately 2,313 kN); this record does not infer a current lifecycle or vehicle relationship beyond the documented Titan application.
- Propellants
- nitrogen tetroxideAerozine-50
- Rocket Specs
- Chamber Count
- 2
- Cycle
- gas generator
- Vacuum Thrust Kn
- 2,313
Links
Assets & Meta
- Creation Time
- August 15, 2026 at 05:31:38 UTC
- Updated Time
- August 15, 2026 at 05:31:38 UTC
Other
- Sources
- Accessed Date
- 2026-08-14
- Note
- NASA's Titan launch-vehicle propulsion memorandum identifies the exact LR87-AJ-11 assembly as two identical engines attached to one frame, operating simultaneously for 520,000 lbf vacuum-rated thrust, with gas generators and N2O4/Aerozine-50 propellants.
- Publisher
- NASA Technical Reports Server
- Title
- Titan III Launch Vehicle Propulsion System
- Accessed Date
- 2026-08-14
- Note
- NASA's Titan III propulsion analysis documents the LR87-AJ-11 N2O4/Aerozine-50 feed system, gas-generator turbopumps, and Titan first-stage application.
- Publisher
- NASA Technical Reports Server
- Title
- Titan III Propulsion Systems