SRB-3
Japan's composite-solid-propellant strap-on booster developed for the H3 launch vehicle, with a fixed nozzle and configurable use in two- or four-booster H3 variants.
Identity
- Aliases
- SRB-3 solid rocket booster
- Domains
- spaceflight
- Identity Level
- model
- Kind
- solid-rocket-motor
- Name
- SRB-3
- Status
- active
Details
- Description
- Japan's composite-solid-propellant strap-on booster developed for the H3 launch vehicle, with a fixed nozzle and configurable use in two- or four-booster H3 variants.
- Developers
- Length M
- 14.6
- Manufacturers
- Propellants
- composite solid propellant
- Rocket Specs
- Burn Time S
- 110
- Vacuum Specific Impulse S
- 283.6
- Vacuum Thrust Kn
- 2,300
Links
- Official Url
- https://www.rocket.jaxa.jp/e/rocket/h3/
Assets & Meta
- Creation Time
- August 1, 2026 at 09:56:11 UTC
- Updated Time
- August 1, 2026 at 09:56:11 UTC
Other
- Diameter M
- 2.5
- Sources
- Note
- JAXA identifies SRB-3 as the H3 composite-solid rocket booster and gives its 2.5 m diameter, 14.6 m length, approximately 110 s burn, and 2300 kN vacuum thrust specification.
- Publisher
- Japan Aerospace Exploration Agency
- Title
- SRB-3
- Note
- JAXA identifies SRB-3 as H3's configurable solid booster.
- Publisher
- Japan Aerospace Exploration Agency
- Title
- H3 Launch Vehicle
- Note
- JAXA records the SRB-3 design-validation firing and 2137 kN maximum thrust.
- Publisher
- Japan Aerospace Exploration Agency
- Title
- Ground Firing Test Results of SRB-3 Module for H-3
- Note
- IHI Aerospace identifies its development of SRB-3 for H3 and Epsilon S.
- Publisher
- IHI Aerospace Co., Ltd.
- Title
- Ever-Evolving Solid Rocket Booster SRB-3