75-ton-class liquid engine
The KARI-developed 75-ton-class kerosene/LOX liquid engine is the open-cycle core engine of Nuri (KSLV-II). KARI identifies turbopumps, combustion chambers, gas generators, and valves as its principal subsystems; it reports 674.7 kN sea-level thrust and 304.8 s vacuum specific impulse, with four engines on Nuri's first stage and one on its second stage. This generic class record preserves the shared propulsion identity without asserting a distinct named stage variant.
Identity
- Aliases
- 75-ton-class liquid engineNURI 75-ton-class engineKSLV-II 75-ton-class liquid engineKARI 75-ton liquid engine
- Domains
- spaceflight
- Identity Level
- generic-system
- Kind
- liquid-rocket-engine
- Name
- 75-ton-class liquid engine
- Status
- active
Details
- Description
- The KARI-developed 75-ton-class kerosene/LOX liquid engine is the open-cycle core engine of Nuri (KSLV-II). KARI identifies turbopumps, combustion chambers, gas generators, and valves as its principal subsystems; it reports 674.7 kN sea-level thrust and 304.8 s vacuum specific impulse, with four engines on Nuri's first stage and one on its second stage. This generic class record preserves the shared propulsion identity without asserting a distinct named stage variant.
- Developers
- Manufacturers
- Propellants
- keroseneliquid oxygen
- Rocket Specs
- Cycle
- gas-generator
- Sea Level Thrust Kn
- 674.7
- Vacuum Specific Impulse S
- 304.8
Links
- Official Url
- https://www.kari.re.kr/eng/contents/180
Assets & Meta
- Creation Time
- July 29, 2026 at 08:03:16 UTC
- Updated Time
- August 22, 2026 at 08:10:13 UTC
- Image
- Download
Other
- Sources
- Accessed Date
- 2026-08-21
- Note
- KARI's dedicated NURI Engine page identifies the 75-ton-class engine as a domestically developed open-cycle liquid engine using kerosene and liquid oxygen. It reports 674.7 kN sea-level thrust and 304.8 s vacuum specific impulse, describes turbopumps and gas generators, and documents four first-stage and one second-stage installations; the normalized cycle field records the gas-generator architecture.
- Publisher
- Korea Aerospace Research Institute
- Title
- NURI Engine — 75-ton-class liquid engine