韩国宣布KF-21研制完成，量产机计划下半年交付

Core Viewpoint - South Korea's KF-21 fighter jet has successfully completed its flight testing and is prepared for deployment in the second half of the year, marking a significant milestone for the country's air force and aerospace industry [1][3]. Group 1: Development and Testing - The KF-21 fighter jet, developed under the KF-X project, has completed approximately 1,600 flight tests over 42 months without any accidents, validating its flight safety and performance [3]. - The final flight test was conducted on January 12, 2023, with the fourth prototype, and the testing efficiency improved due to expanded testing locations and the introduction of aerial refueling [3]. - The Defense Acquisition Program Administration (DAPA) plans to complete the KF-21 system development in the first half of this year and begin delivering the first batch of production aircraft to the South Korean Air Force in the second half [3]. Group 2: Financial and Partnership Aspects - Indonesia, a partner in the KF-X project, has faced significant delays in funding, having only paid 2.272 trillion KRW of its 6 trillion KRW commitment, leading to a reduction in its technology transfer and production rights [5]. - The original plan included Indonesia's flag on the KF-21 prototypes, but due to funding issues, this was temporarily removed [7]. - The South Korean government plans to invest 8.4 trillion KRW to procure the first 40 KF-21 aircraft, but budget constraints have emerged, necessitating a potential delay in the procurement timeline to 2029 [8].