Aerojet XLR73-AJ-1 rocket engine
Aerojet's XLR73-AJ-1 was a historical single-chamber liquid rocket engine considered for the X-15 research-aircraft competition. NASA records white fuming nitric acid and jet fuel propellants, 10,000 lbf sea-level thrust in its existing configuration (with an 11,750-lbf nozzle option), electric-ignition restart in flight, and continuously variable thrust from 50% to 100%; no flight installation is asserted here.
Identity
- Aliases
- XLR73-AJ-1XLR-73-AJ-1XLR73
- Domains
- aviationspaceflight
- Identity Level
- variant
- Kind
- liquid-rocket-engine
- Name
- Aerojet XLR73-AJ-1 rocket engine
- Status
- historical
Details
- Description
- Aerojet's XLR73-AJ-1 was a historical single-chamber liquid rocket engine considered for the X-15 research-aircraft competition. NASA records white fuming nitric acid and jet fuel propellants, 10,000 lbf sea-level thrust in its existing configuration (with an 11,750-lbf nozzle option), electric-ignition restart in flight, and continuously variable thrust from 50% to 100%; no flight installation is asserted here.
- Propellants
- white fuming nitric acidjet fuel
- Rocket Specs
- Chamber Count
- 1
- Restartable
- Yes
- Sea Level Thrust Kn
- 44.482445
Links
Assets & Meta
- Creation Time
- August 15, 2026 at 03:37:40 UTC
- Updated Time
- August 15, 2026 at 03:37:40 UTC
Other
- Sources
- Accessed Date
- 2026-08-14
- Note
- NASA's X-15 history identifies the exact Aerojet XLR73-AJ-1, its single chamber, white fuming nitric acid/jet fuel propellants, 10,000-lbf sea-level thrust, 11,750-lbf nozzle option, electric restart, and 50–100% variable thrust range.
- Publisher
- NASA Technical Reports Server
- Title
- Hypersonics Before the Shuttle
- Accessed Date
- 2026-08-14
- Note
- NASA's X-15 design history places XLR73-AJ-1 among the propulsion candidates evaluated for the Project 1226 research-aircraft competition.
- Publisher
- NASA
- Title
- X-15: Extending the Frontiers of Flight