South Korea's pure domestic rocket launches successfully

Special reporter in South Korea Liu Hai Sheng, a reporter from Fan Wei, reporter

Along with the smooth lift of the South Korean "World" carrier rocket on the 21st, South Korean media are jubilant. South Korea's "Korean Daily" proudly announced that "this successful launch proves that South Korea is the seventh aerospace power that can launch practical satellites in the world."

"South Korea's sky is suddenly open"

Yonhap News Agency reported on June 21 that South Korea's first self -developed carrier rocket "World" was lifted off at the Luo Lao Aerospace Center, which is located in Holy County, Jeonano, South Korea at 4 pm. The main load PVSAT satellite and the simulation load and the four "cubic stars" satellites are sent to a scheduled solar synchronization track with a height of 700 kilometers. This launch task is successful.

South Korea's "Korean Daily" said on the 21st that there were 9 countries or organizations with independent satellite launch capabilities in the world: Russia, the United States, the European Union, China, Japan, India, Israel, Iran, and North Korea. Among them, only the top 6 can be sent to space with a practical satellite weighing more than 1 ton. Israel, Iran, and North Korea can only transmit satellites weighing less than 300 kg to space. With the launch of the "World", South Korea has also become the seventh aerospace country in the world to launch practical satellites to space.

At a press conference to announce the success of the "World" launch task, Li Zonghao, Minister of Science and Technology Information and Communications, said, "today we have ushered in a milestone in the field of science and technology in Korea. Great progress has been made. "

Prior to this success, the road to South Korea was twists and turns. South Korea's first purchase of Russian technology assembly "Luo Lao" rocket failed twice in succession, and it was not successful until the last time. Since then, South Korea has turned its focus to independent Rockets. At 4 pm on October 21, 2021, when the "Pure Domestic" "World" was conducted for the first track launch, because the third -level engine was shut down in advance, the 1.5 -ton simulation load was not sent to the scheduled track. The launch encountered failure.

Subsequently, the South Korean Aerospace Research Institute formed an investigation committee, and finally confirmed that the reason for the accident was "the structural design of the Rockets was unreasonable." After the improvement, the "World" was re -sent to the transmitting rack, but due to the data abnormal data of the liquid oxygen storage tank and encountering heavy winds, its second launch was delayed twice.

What is the performance of the "World"

Regarding this major breakthrough in South Korea in the field of aerospace, Huang Zhicheng, a Chinese air dynamicist and aerospace technology expert, said in an interview with the Global Times reporter on the 21st that the "World" was successfully launched. , To use dozens of companies, it also spent a lot of money.

According to the parameters published by the Korean Aeronautical Aerospace Research Institute, the "World" is a third-level structure liquid carrier rocket. The whole arrow is about 46.5 meters long, and the first parallel is connected with 4 75-ton KRE-75 liquid oxygen and oil engines. The 75-ton KRE-075 engine, the third level is a 7-ton KRE-007 engine, which can send 1.5 tons of loads into a near-ground orbit of 600-800 kilometers. Huang Zhicheng said that the overall technical ability of the "World" rocket is not strong. For example, the KRE-75 liquid oxygen and oil engine used by the first-class rocket is not very high. The vacuum environment is only 298 seconds, and the sea level is only 261.7 seconds, which limits the overall performance of the rocket. The "World" rocket's near -ground orbital carrier capacity is 2.6 tons, and the carrier capacity of the solar synchronization rail is 1.5 tons. Huang Zhicheng believes that the overall performance of the "World" rocket is better than the Long March 1 Rockets that launch my country's first artificial satellite, but lower than the level of the Long March 2 carrier rocket. Both rockets in China have retired. "Some commercial rockets developed by some private space companies in China are also slightly better than the" World 'Rockets. Above. "

Korean Rockets will aim at the moon next

South Korea's News News Agency said on the 21st that the launch of the "World" successfully indicated that South Korea has all the "industry -university -research" capabilities that have aerospace launch. The South Korean Aerospace Research Institute is responsible for the construction of infrastructure such as the "World" rocket core technology development and launch site. A large number of Korean heavyweight companies have participated in the development of rocket core components and subsystems, and the assembly of the carrier rocket.

South Korea's "Asian Economy" outsiders on the 21st that after the successful launch of the "World" of liquid fuel, the South Korean military will conduct a test of solid fuel rockets, hoping to simultaneously promote multiple purposes such as reconnaissance satellite launch, missile technology progress, and space exploration of space. After the U.S.'s lifting of the Korean missiles in May 2021, the Korean army immediately developed rockets promoted by solid fuel to launch reconnaissance satellites. The preparation time for North Korea's liquid fuel ballistic missiles is about an hour, while the preparation time for South Korea to launch solid fuel ballistic missiles is only 20 to 30 minutes. After all South Korean reconnaissance satellites are in place in the future, they can monitor sensitive areas such as North Korean missile positions in a 10-20 minutes interval frequency. Early warning capabilities and countermeasures will increase significantly.

"The" World "makes South Korea a aerospace power, and it is getting closer to South Korea's landing in the moon in 2031." South Korea's "Daily Economy" excitedly reported on the 21st that the new generation of South Korea's carrier rocket will have a 1.8 -ton moon orbit transportationAbility, and prepare to send the lunar car in 2031.▲