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The Korea Space Launch Vehicle (KSLV-II) program is a national space development project with the budget of KRW 1.957 trillion over ten years. Its goal is to develop an independent space launch vehicle capable of putting a 1.5 ton multi-purpose satellite into low earth orbit at 600~800km altitude.
In addition to the technologies and know-how acquired through the Naroho (KSLV-I) program, Korea will acquire key technologies such as a high-thrust liquid rocket engine, propulsion test facilities and equipment, as well as comprehensive launch vehicle operational know-how needed for the development of a launch vehicle.
The Korea Space Launch Vehicle (KSLV-II) is a 3-stage launch vehicle consisting of 1st stage with 4 clustered 75-ton liquid rocket engines, 2nd stage with a 75-ton liquid rocket engine and 3rd stage with a 7-ton liquid rocket engine under parallel development.
The Korea Space Launch Vehicle (KSLV-II) program consists of 3 continuous phases. Phase 1 (Mar. 2010~Jul. 2015) activities include reviews of preliminary and system designs, construction of propulsion test facilities and ground test of 7-ton liquid rocket engine, which are successfully accomplished. During the Phase 2 (Aug. 2015-Mar. 2018), currently underway, the detailed design of engine and the launch vehicle, ground test of 75-ton liquid rocket engine and launch of Test Launch Vehicle (for the verification 75-ton LRE performance) will be completed. The final Phase 3 (Apr. 2018-Mar. 2021) aims the completion of the 3-stage launch vehicle system development effort, which will be followed by two trial launches to confirm the successful program accomplishment.
Rocket engine is the core element of launch vehicle technology. The development of a 75- ton-class liquid rocket engine and a 7-ton-class liquid rocket engine is the key agenda of the Korea Space Launch Vehicle (KSLV-II) program.
During the period of Naroho (KSLV-I) program, component development of 30-ton class liquid rocket engine and preliminary studies on 75-ton liquid rocket engine have been performed.
To reduce time, cost and technical difficulties, The 75-ton-class and 7-ton-class liquid engines to be mounted on Korea Space Launch Vehicle (KSLV-II) will be developed to the gas generator-turbo-pump type which will use kerosene as fuel and oxygen as oxidizer.
For the development of rocket engine for the Korea Space Launch Vehicle (KSLV-II), 10 different propulsion(engine) test facilities (including Combustion Chamber Test Facility, Turbo-pump Test Facility, Rocket Engine Test Facility, Altitude Engnie Faciltiy, Propulsion System Test Facility in Naro Space Center) have been constructed in various locations. These facilities enabled the large-scale/high-thrust engine tests which were previously impossible in Korea.
These test facilities enable step-by-step tests of component performance tests for combustion chamber, turbo-pump and gas generators, which are key components of the 7-ton and 7-ton engines, and performance tests of integrated engines in ground and high altitude conditions.
The plan is to conduct tests (each requires around one week of preparation/test/analysis) on each component and engine anywhere between several dozens and 200 times.