Moon says Nuri rocket completes all flight sequences but fails to put dummy satellite into orbit

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Moon says Nuri rocket completes all flight sequences but fails to put dummy satellite into orbit

President Moon Jae-in applauds the scientists as he moves to deliver a message to the public after witnessing the launch of Korea’s first domestically-built space rocket Nuri at the Naro Space Center in Goheung, South Jeolla Province, Thursday. Yonhap

President Moon Jae-in said Thursday South Korea’s first domestically-built space rocket completed all flight sequences as scheduled but fell short of putting a dummy satellite into orbit.

Moon praised scientists and engineers for developing the space rocket that reached a target altitude of 700 kilometers, describing it as a “creditable achievement.”

“The test-launch of Nuri-ho was completed. I am proud of it,” Moon told the public after witnessing the launch at the Naro Space Center, the nation’s sole spaceport. “Regrettably, we did not perfectly reach the goal, but we made a very creditable achievement in the first launch.”

After 12 years of development, engineers launched the 200-ton three-stage launch vehicle, KSLV-II ― also known as Nuri ― that carried the 1.5-ton mock payload at the Naro Space Center in Goheung, 473 kilometers south of Seoul.

Moon said scientists and engineers are investigating why the dummy satellite failed to stay in orbit after it was apparently successful deployed from the rocket. All three stages of the Nuri rocket successfully operated, Moon said.

By making up for shortcomings shown at Thursday’s launch, South Korea will try to successfully put a payload into orbit with its second launch of Nuri set for May next year, Moon said.

“Stably putting a dummy satellite into orbit remains an unfinished task. However, lifting a launch vehicle to an altitude of 700 kilometers is a great feat in itself and made us inch closer to space,” Moon said.

Moon says Nuri rocket completes all flight sequences but fails to put dummy satellite into orbit

President Moon Jae-in delivers a message to the public after witnessing the launch at the Naro Space Center in Goheung, South Jeolla Province, Thursday. Yonhap

The success rate for newly developed rockets at first attempt is 30 percent to date, scientists said.

The Nuri rocket uses a clustering of four 75-ton liquid engines in its first stage, a 75-ton liquid engine in the second stage and a 7-ton liquid engine in the third stage.

A successful launch would make South Korea the seventh country in the world to have developed a space launch vehicle that can carry a more than 1-ton satellite, after Russia, the United States, France, China, Japan and India.

The Nuri is the first step for South Korea’s ambitious space program, which Moon pledged will meet its target of landing the nation’s own probe on the Moon by 2030.

South Korea plans to conduct four more launches of the Nuri until 2027 to increase reliability, officials said. (Yonhap)

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