YF-75
YF-75 is the liquid-hydrogen/liquid-oxygen cryogenic engine identified by SpaceChina for the Long March 8 second stage. SpaceChina states that the second-stage YF-75 installation has secondary ignition capability; that restart boundary is represented explicitly without inferring unverified thrust or cycle details.
Identity
- Aliases
- YF-75 cryogenic rocket engineYF-75 hydrolox upper-stage engineYF75CASC YF-75
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- YF-75
- Status
- active
Details
- Description
- YF-75 is the liquid-hydrogen/liquid-oxygen cryogenic engine identified by SpaceChina for the Long March 8 second stage. SpaceChina states that the second-stage YF-75 installation has secondary ignition capability; that restart boundary is represented explicitly without inferring unverified thrust or cycle details.
- Propellants
- LH2LOX
- Rocket Specs
- Cycle
- gas generator
- Restartable
- Yes
Assets & Meta
- Creation Time
- August 14, 2026 at 00:02:13 UTC
- Updated Time
- August 22, 2026 at 08:36:01 UTC
Other
- Sources
- Accessed Date
- 2026-08-20
- Note
- CASC overview states that the Long March 8 second stage uses two YF-75 engines with 8-ton-class thrust and secondary ignition capability.
- Publisher
- China Aerospace Science and Technology Corporation
- Title
- SpaceChina Long March 8 propulsion overview
- Accessed Date
- 2026-08-20
- Note
- CNSA launch-vehicle family material identifies YF-75 as the cryogenic liquid-hydrogen/liquid-oxygen upper-stage engine; no additional model-wide performance values are inferred here.
- Publisher
- China National Space Administration
- Title
- CNSA Long March Launch Vehicle Family