LEROS 4
Nammo Space LEROS 4 is a MON-3/MMH bipropellant high-thrust apogee engine for deep-space and planetary missions. Nammo publishes a 900–1,100 N thrust range, 321 s minimum specific impulse, restart demonstrations and qualification status; Firefly documents the related Blue Ghost lunar-lander main-engine application, while the more specific LEROS 4-ET subtype is not inferred here. Lifecycle remains development.
Identity
- Aliases
- LEROS 4 Interplanetary EngineHigh Thrust Apogee EngineHTAE
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- LEROS 4
- Status
- development
Details
- Description
- Nammo Space LEROS 4 is a MON-3/MMH bipropellant high-thrust apogee engine for deep-space and planetary missions. Nammo publishes a 900–1,100 N thrust range, 321 s minimum specific impulse, restart demonstrations and qualification status; Firefly documents the related Blue Ghost lunar-lander main-engine application, while the more specific LEROS 4-ET subtype is not inferred here. Lifecycle remains development.
- Developers
- Manufacturers
- Propellants
- monomethylhydrazineMON-3
- Rocket Specs
- Restartable
- Yes
- Vacuum Specific Impulse S
- 321
- Vacuum Thrust Kn
- 1
Links
Assets & Meta
- Creation Time
- August 15, 2026 at 04:34:29 UTC
- Updated Time
- August 15, 2026 at 04:34:29 UTC
Other
- Sources
- Accessed Date
- 2026-08-14
- Publisher
- Nammo
- Title
- LEROS 4 Interplanetary Engine
- Accessed Date
- 2026-08-14
- Publisher
- Firefly Aerospace
- Title
- Blue Ghost Mission 1: Ghost Riders in the Sky