Nuri

Nuri. Officially known as the Korea Space Launch Vehicle-II (KSLV-II), it is a three-stage launch vehicle developed indigenously by the Korea Aerospace Research Institute (KARI) with the goal of achieving independent access to space for South Korea. The program represents a major national technological endeavor, successfully placing test satellites into Low Earth orbit and marking a pivotal moment in the country's spacefaring ambitions. Its development has involved numerous domestic companies and research institutes, establishing a foundational industrial base for the nation's future space projects.

Etymology and meaning

The launch vehicle was officially named "Nuri" by the public, a word meaning "world" in the Korean language. This name was chosen to symbolize the aspiration of the Korean people to advance into the wider universe. The naming contest was administered by the Ministry of Science and ICT, reflecting the project's status as a national priority. The designation KSLV-II distinguishes it from its predecessor, the KSLV-I (Naro-1), which was developed in cooperation with Russia.

History and development

The development program was authorized following the partial success of the earlier Naro-1 rocket, which utilized a first stage built by the Khrunichev State Research and Production Space Center. Initiated in 2010, the project aimed to domestically produce all key stages and the liquid-propellant engines. Primary development was led by Korea Aerospace Research Institute, with major industrial partners including Hanwha Aerospace, which manufactured the engines. The project faced significant technical hurdles, particularly in mastering the combustion stability of the KRE-075 engines, leading to multiple test delays at the Naro Space Center.

Technical specifications

The vehicle stands 47.2 meters tall with a diameter of 3.5 meters and a total lift-off mass of approximately 200 metric tons. The first stage is powered by a cluster of four KRE-075 engines, each generating about 75 tons of thrust, burning Kerosene and Liquid oxygen. The second stage uses a single vacuum-optimized KRE-075 engine, while the third stage employs a smaller KRE-007 engine. It is capable of delivering a 2,600 kg payload to a Low Earth orbit or 1,500 kg to a Sun-synchronous orbit. The rocket's flight computer and inertial navigation system were also developed domestically.

Launch history

The first test flight, designated Nuri Flight Test-1, occurred on 21 October 2021 from the Naro Space Center; it successfully performed stage separations and reached target velocity but failed to deploy a dummy satellite due to an oxidizer tank issue. The second flight, Nuri Flight Test-2, launched on 21 June 2022, and was a complete success, accurately placing a performance verification satellite and several cubesats into orbit. The third and first operational flight launched on 25 May 2023, successfully deploying the Next Generation Small Satellite-2 and seven other satellites, confirming the vehicle's reliability.

Significance and impact

The successful launches have made South Korea the seventh nation in the world to demonstrate the independent capability to launch a satellite weighing over one ton using a domestically built vehicle. This achievement has profound implications for national security, enabling sovereign control over reconnaissance satellite deployments, and for scientific research, facilitating future lunar and deep space missions. The program has also catalyzed the growth of a private space sector, with companies like Innospace and Perigee Aerospace developing subsequent launch vehicles. It positions the country as a new participant in the global commercial launch market.

Category:Launch vehicles of South Korea Category:Space program of South Korea