State-run Korea Aerospace Industries (KAI) has revealed the first mass-produced version of the Republic of Korea Air Force’s KF-21 Boramae fighter jet, marking a major milestone in the country’s indigenous defense program.
The rollout comes more than two decades after South Korea first outlined its ambition to develop a homegrown combat aircraft. The program formally began in 2015, with the first prototype unveiled in 2021 and its maiden flight completed in 2022.
Mass production commenced in 2024 after over 1,600 flight tests, with the government planning to begin operational deployment in September 2026 following final verification trials.
At the ceremony held at KAI’s facility in Sacheon, President Lee Jae Myung highlighted the achievement as a significant step toward strengthening the nation’s defense self-reliance.
KF-21 Boramae Overview
The KF-21 program was initiated to replace South Korea’s aging F-4 and F-5 fleets by 2030. KAI aims to produce up to 120 aircraft, with deliveries expected to be completed before the end of the decade.
The fighter measures 17 meters in length with an 11-meter wingspan and carries up to 6,000 kilograms of fuel. It is powered by twin Hanwha/General Electric F414 engines generating a combined 110,000 horsepower.
This propulsion enables speeds of up to Mach 1.8, a range of 1,500 nautical miles, and an operational ceiling of 16,700 meters.
Once operational, the KF-21 will be equipped with a 20mm rotary autocannon, guided and unguided munitions, electronic warfare and countermeasure systems, along with air-to-air, anti-ship, and land-attack missile capabilities.
