LE-5
The original Japanese cryogenic upper-stage engine flown by the retired H-I launch vehicle.
Identity
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- LE-5
- Status
- retired
Details
- Description
- The original Japanese cryogenic upper-stage engine flown by the retired H-I launch vehicle.
- Family
- Propellants
- liquid hydrogenliquid oxygen
- Rocket Specs
- Cycle
- gas-generator
- Restartable
- Yes
- Vacuum Specific Impulse S
- 450
- Vacuum Thrust Kn
- 103
Links
Assets & Meta
- Creation Time
- July 29, 2026 at 08:48:30 UTC
- Updated Time
- July 29, 2026 at 08:50:23 UTC
Other
- Sources
- Accessed Date
- 2026-07-29
- Note
- Supports the legacy vehicle installation and the narrow canonical identity used for migration.
- Publisher
- Official vehicle or program source
- Title
- H-I Launch Vehicle official vehicle reference
- Accessed Date
- 2026-07-29
- Publisher
- Japan Aerospace Exploration Agency
- Title
- LE-5B