On July 19, 2022, the KF-21 Boramae fighter jet developed by Korea Aerospace Industries (KAI) completed its maiden flight. The first flight took place at the Sucheon Air Force Base in Gyeongsangnam do, South Korea (which is the headquarters of the Korean Air Force's 3rd Flight Training Squadron) and lasted for over 30 minutes. The successful maiden flight means that South Korea has become the world's 8th advanced research and development countryUltrasonic velocityThe country of fighter jets. The Defense Acquisition Program Administration (DAPA) of the South Korean Ministry of National Defense revealed that the KF-21 is a 4.5-generation fighter jet equipped with four "Meteor" air-to-air missiles during its maiden flight, but without other major equipment such as infrared search and tracking systems. The flight speed achieved during the maiden flight was about 400 kilometers per hour. This type of aircraft is a product of the KF-X program in South Korea, which was proposed by the then and now deceased President Kim Dae jung in March 2001 to develop a more advanced fighter jet than the F-16. The South Korean Air Force plans to install 120 KF-Xs by 2032 to replace its aging fleet of F-4 and F-5 fighter jets. In 2010, South Korea and Indonesia signed a project cooperation agreement. According to the agreement, Indonesia will provide 20% of the estimated 8.8 trillion Korean won (approximately 6.76 billion US dollars) total development budget for the KF-X project, thereby obtaining technology transfer and manufacturing some of the aircraft in Indonesia to provide to the Indonesian Air Force. The development process of KF-X has experienced a series of twists and turns, such as the choice of single engine or dual engine, the refusal of the United States to transfer core technology, and significant modifications to the aircraft layout, resulting in the project being postponed. The project began exploratory research in 2011, and in 2015, the Defense Acquisition Program Administration signed a development contract with Korea Aerospace Industries Corporation. At present, the Korean Aerospace Industries Corporation has manufactured 6 prototype aircraft and plans to complete 2000 test flights over the western and southern waters of South Korea by 2026. Then, a one-year operational suitability test will be conducted in 2026 to achieve final operational suitability, equipped with active phased arrayradarWith one set of infrared search and tracking system, it can carry and use the European Missile Company's "Meteor" medium range air-to-air missile and the German Deere Company's AIM-2000 close range air-to-air missile. From 2026 to 2028, the air ground combat capability will be further increased.