Chief of Staff of the Republic of Korea Air Force Son Seok-rak is seen conducting a test flight aboard a KAI KF-21 Boramae fighter jet on Nov. 5 last year at Sacheon Air Base, during his first command flight since taking office. Provided by the Air
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South Korea's KAI KF-21 Boramae, the fighter jet set to defend the nation's airspace, has cleared the final hurdle for operational deployment. The latest combat suitability approval carries major strategic significance, as it gives South Korea, a country that now fields a domestically developed supersonic fighter, greater autonomy in air operations in Northeast Asia. By securing independence in weapons integration, the military is expected to gain the ability to freely incorporate the systems it needs, making the aircraft a key asset in maintaining the regional balance of power.
■ More than 1,600 test flights, 13,000 test conditions fully verified
According to DAPA on the 7th, the KF-21 Boramae program has received combat suitability approval, the final gate in system development. The result follows about three years of rigorous follow-up testing after the aircraft received provisional combat suitability approval in May 2023. Since development began in 2015, the KF-21 has completed more than 1,600 flight tests and fully verified more than 13,000 demanding test conditions, including aerial refueling and weapons launches, meeting the Air Force's operational requirements.
The approval confirms all performance capabilities of the KF-21 Block I, which covers basic performance and air-to-air capability. With system development set to conclude in June this year, the first mass-produced aircraft is expected to be delivered to the Air Force in the second half of the year. It will then be deployed in stages and is expected to become a core asset in air defense.
The KF-21's design philosophy is forward-looking. In the Block I phase, it adopted a semi-conformal configuration that places weapons on the lower exterior of the fuselage, but the aircraft was reportedly designed with a fifth-generation stealth fighter concept in mind, allowing for future full internal weapons carriage. This evolutionary approach has helped position the KF-21 as more than just a 4.5-generation fighter. It is seen as a growth platform that can be upgraded into a fully stealth-capable aircraft suited to future battlefield conditions through internal weapons integration.