KM-V2b
The exact KM-V2b solid motor used as the third-stage motor of Japan's original Epsilon Test Flight Model. It is distinct from the later KM-V2c third-stage motor used by Enhanced Epsilon.
Identity
- Aliases
- KM-V2bEpsilon Test Flight third-stage motor
- Domains
- spaceflight
- Identity Level
- model
- Kind
- solid-rocket-motor
- Name
- KM-V2b
- Status
- unknown
Details
- Description
- The exact KM-V2b solid motor used as the third-stage motor of Japan's original Epsilon Test Flight Model. It is distinct from the later KM-V2c third-stage motor used by Enhanced Epsilon.
- Propellants
- solid HTPB composite propellant
Links
Assets & Meta
- Creation Time
- August 1, 2026 at 17:26:09 UTC
- Updated Time
- August 1, 2026 at 17:26:09 UTC
Other
- Sources
- Accessed Date
- 2026-08-01
- Note
- JAXA identifies KM-V2b as the exact upper-stage motor adopted for the Epsilon demonstration vehicle E-X.
- Publisher
- Japan Aerospace Exploration Agency ISAS
- Title
- Epsilon propulsion system (ISAS News No. 374)
- Accessed Date
- 2026-08-01
- Note
- JAXA distinguishes the original test-flight vehicle from Enhanced Epsilon and documents the M-V upper-stage technology boundary; the exact b/c suffix distinction is retained from the ISAS propulsion source.
- Publisher
- Japan Aerospace Exploration Agency
- Title
- Epsilon test flight and enhanced vehicle evolution