YF-75DA
YF-75DA is an active Chinese liquid-hydrogen/liquid-oxygen upper-stage rocket engine developed by China Aerospace Science and Technology Corporation’s Sixth Academy. CASC identifies it as a new expander-cycle engine that first flew on Long March 8A on 2025-02-11, with more than 10 percent higher thrust than YF-75D, reduced mass, and validated capability for a subsequent start; the exact thrust and mass are not asserted here because the source gives relative changes only.
Identity
- Aliases
- YF-75DAYF-75DA hydrolox engineYF75DACASC YF-75DA
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- YF-75DA
- Status
- active
Details
- Description
- YF-75DA is an active Chinese liquid-hydrogen/liquid-oxygen upper-stage rocket engine developed by China Aerospace Science and Technology Corporation’s Sixth Academy. CASC identifies it as a new expander-cycle engine that first flew on Long March 8A on 2025-02-11, with more than 10 percent higher thrust than YF-75D, reduced mass, and validated capability for a subsequent start; the exact thrust and mass are not asserted here because the source gives relative changes only.
- First Flight Date
- 2025-02-11
- Propellants
- liquid hydrogenliquid oxygen
- Rocket Specs
- Cycle
- expander cycle
- Restartable
- Yes
Links
Assets & Meta
- Creation Time
- August 14, 2026 at 00:20:55 UTC
- Updated Time
- August 22, 2026 at 08:34:44 UTC
Other
- Sources
- Accessed Date
- 2026-08-13
- Note
- CASC identifies YF-75DA as a new expander-cycle hydrogen/oxygen engine, first flown on Long March 8A in February 2025, and describes its thrust and mass improvements over YF-75D.
- Publisher
- China Aerospace Science and Technology Corporation
- Title
- New engine powers successful Long March 8A launch
- Accessed Date
- 2026-08-13
- Note
- CASC describes YF-75DA as the Long March 8A hydrolox upper-stage engine using expander-cycle technology.
- Publisher
- China Aerospace Science and Technology Corporation
- Title
- Long March 8A technical innovation and YF-75DA engine