M-35
JAXA's M-35 is the current Enhanced Epsilon second-stage solid motor, enlarged from the first Epsilon's M-34c; its performance was demonstrated by Epsilon-2. JAXA's user manual lists 4.3 m length, 2.6 m diameter, 17.0 t stage weight, 15.0 t propellant, 372 kN thrust, 140 s burn time, and 300 s specific impulse. This record uses active for current JAXA documentation of the Enhanced Epsilon configuration and does not assert that M-35 is the motor for the successor Epsilon S.
Identity
- Aliases
- M-35 solid rocket motorEpsilon M-35
- Domains
- spaceflight
- Identity Level
- model
- Kind
- solid-rocket-motor
- Name
- M-35
- Status
- active
Details
- Description
- JAXA's M-35 is the current Enhanced Epsilon second-stage solid motor, enlarged from the first Epsilon's M-34c; its performance was demonstrated by Epsilon-2. JAXA's user manual lists 4.3 m length, 2.6 m diameter, 17.0 t stage weight, 15.0 t propellant, 372 kN thrust, 140 s burn time, and 300 s specific impulse. This record uses active for current JAXA documentation of the Enhanced Epsilon configuration and does not assert that M-35 is the motor for the successor Epsilon S.
- First Flight Date
- 2016-12-20
- Length M
- 4.3
- Propellants
- solid HTPB composite
- Rocket Specs
- Burn Time S
- 140
- Vacuum Specific Impulse S
- 300
- Vacuum Thrust Kn
- 372
Links
Assets & Meta
- Creation Time
- August 1, 2026 at 16:32:28 UTC
- Updated Time
- August 21, 2026 at 00:17:41 UTC
Other
- Diameter M
- 2.6
- Sources
- Accessed Date
- 2026-08-01
- Note
- JAXA identifies M-35 as the current Epsilon second-stage motor, describes its improvement from M-34c, and lists its solid HTPB propellant.
- Publisher
- Japan Aerospace Exploration Agency
- Title
- Epsilon User's Manual
- Accessed Date
- 2026-08-01
- Note
- JAXA documents Epsilon's second-stage heritage from M-V upper-stage technology without collapsing the exact M-35 identity into a broad M-V family.
- Publisher
- Japan Aerospace Exploration Agency
- Title
- Epsilon Technology: A Link to the Future
- Accessed Date
- 2026-08-20
- Note
- JAXA's current Epsilon User's Manual identifies M-35 as the second stage of Enhanced Epsilon, lists 4.3 m length, 2.6 m diameter, 17.0 t stage weight, 15.0 t propellant, 372 kN thrust, 140 s burn time, and 300 s specific impulse, and states that M-35 performance was demonstrated by Epsilon-2; the manual's launch history records Epsilon-2 on 2016-12-20.
- Publisher
- Japan Aerospace Exploration Agency
- Title
- Epsilon User's Manual
- Accessed Date
- 2026-08-20
- Note
- JAXA's Space Transportation Technology Directorate distinguishes the Enhanced Epsilon second-stage motor from the successor Epsilon S project and documents the enlarged 2.6 m second-stage form factor.
- Publisher
- Japan Aerospace Exploration Agency Space Transportation Technology Directorate
- Title
- Epsilon