LE-9
The large expander-bleed first-stage engine in operational use on H3.
Identity
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- LE-9
- Status
- active
Details
- Description
- The large expander-bleed first-stage engine in operational use on H3.
- Lineage
- Note
- JAXA identifies LE-9 as a scaled-up application of the expander-bleed cycle used by the LE-5B series.
- Related Propulsion System
- Relationship
- technology-derived-from
- Sources
- Nested value
- Propellants
- liquid hydrogenliquid oxygen
- Rocket Specs
- Cycle
- expander-bleed
- Vacuum Specific Impulse S
- 422
- Vacuum Thrust Kn
- 1,471
Links
- Official Url
- https://www.rocket.jaxa.jp/rocket/h3/
Assets & Meta
- Creation Time
- July 29, 2026 at 08:49:33 UTC
- Updated Time
- July 29, 2026 at 08:51:10 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
- H3-30S official vehicle reference
- Accessed Date
- 2026-07-29
- Publisher
- Japan Aerospace Exploration Agency
- Title
- H3 Launch Vehicle: LE-5B-3 and LE-9
- Accessed Date
- 2026-07-29
- Publisher
- Japan Aerospace Exploration Agency
- Title
- LE-5B-3