South Korea’s KF-21 Boramae program took another major step toward operational readiness as its sixth prototype aircraft completed a series of high-stakes test flights, including air-to-air gunnery and weapons separation trials, program officials confirmed this week.
The advanced 4.5-generation fighter, developed by Korea Aerospace Industries (KAI), is on track to conclude its Block 1 development phase by early next year, with Block 2 enhancements set to follow immediately.
Speaking after the latest test campaign, KAI’s chief test pilot, Cha Myung-soo, described the intense pace of trials designed to refine the aircraft’s flight control systems and ensure combat readiness.
“Today’s sortie focused on compensating for potential attitude changes when the onboard gun is fired,” Cha said. “We verified that the flight control system can stabilize the aircraft effectively, even during rapid-fire conditions.”
https://www.youtube.com/watch?v=kuAnfYfdXuw&t=214s
The KF-21 prototype No. 6 has been central to testing advanced electronic warfare systems, while other airframes in the six-aircraft fleet have been designated for distinct mission profiles, including high angle-of-attack recovery and radar integration.
“This is a highly modular test program. Each prototype specializes in validating different capabilities to accelerate overall development,” Cha explained.
KAI confirmed that the program has already logged more than 1,300 sorties—roughly 70% of Block 1’s planned flight tests. Recent milestones include successful air-to-air missile firings of the Meteor and AIM-2000, even under supersonic conditions and external fuel tank configurations.
“From initial glide tests to complex combat scenarios, the KF-21 has demonstrated steady progress,” a KAI program engineer noted. “This puts us on schedule for the Republic of Korea Air Force’s operational evaluation early next year.”
Beyond Block 1, Block 2 upgrades will introduce precision air-to-ground capabilities, further cementing the KF-21’s role as South Korea’s next frontline fighter. Future variants are also expected to incorporate fully internal weapons bays for enhanced stealth.
The Boramae, meaning “young hawk” in Korean, is designed to replace aging F-4 and F-5 fighters in South Korea’s inventory, while serving as a potential export platform for allied nations.
Cha emphasized safety as a top priority during testing. “Every sortie is conducted with meticulous preparation and redundancy because the success of this program carries national importance,” he said.
With Block 1 deliveries on the horizon and Block 2 development in sight, South Korea’s ambitious fighter jet program is positioning itself as a cornerstone of the nation’s defense modernization efforts.