South Korea confirms the completion of the KF-21 Boramae flight check program after 1,600 sorties, paving the best way for ROKAF deliveries and Block 2 improvement.
South Korea’s indigenous KF-21 Boramae (Korean for “Hawk”) fighter has reached a serious milestone, with the nation formally asserting the completion of the flight check marketing campaign. The achievement represents an vital step towards operational service with the Republic of Korea Air Drive (ROKAF), with the primary deliveries scheduled for 2026.
Flight check program
In response to South Korea’s Protection Acquisition Program Administration (DAPA), the flight check program concluded after roughly 1,600 sorties carried out over a 42-month interval, “with none accidents” because the first flight in July 2022. The marketing campaign wrapped up two months forward of schedule, with the ultimate check flight carried out by the fourth prototype on Jan. 12, 2026, from Korea Aerospace Industries’ (KAI) services at Saechon.
DAPA officers, quoted by South Korea’s Yonhap Information Company, attributed the accelerated schedule to the usage of further check areas and the combination of air-to-air refueling into the marketing campaign. This allowed the plane to stay airborne longer and conduct a number of evaluations throughout a single sortie.
The check program encompassed round 13,000 particular person check situations, protecting a large spectrum of operational and edge-of-envelope eventualities, together with air-to-air weapon launches and restoration from excessive flight attitudes. A complete of six flying prototypes have been used, of which two have been twin-seat variants, in addition to two prototypes for floor exams.
Block 1’s Fielding
DAPA will finalize the KF-21’s improvement program within the first half of 2026, with the deliveries beginning within the second half. South Korea has already a contract for 40 KF-21 Block 1 plane, fist signed in 2024, and the primary jet entered closing meeting in Might 2025.
Whereas these preliminary jets are primarily meant for air-to-air missions, their introduction will permit to determine a foothold within the ROKAF, shaping coaching and procedures. On the identical time, the introduction of the KF-21 Block 1 permits to start the alternative of the F-4 Phantom and F-5 Tiger, among the many service’s oldest platforms.
The preliminary variant of the KF-21 is not going to embrace an inside weapons bay, with the weapons carried externally. The plane will function 4 semi-recessed attachment factors for Meteor missiles under the fuselage, in addition to a chin mounting level under the precise engine’s air inlet for an indigenous focusing on pod, and a complete of six wing hardpoints, which might be capable of carry exterior gas tanks, JDAM bombs and IRIS-T missiles.
The ROKAF goals to subject 120 KF-21s by 2032, additionally together with the Block 2 variant, complementing the KF-16 Preventing Falcon, F-15K Slam Eagle and F-35A Lightning II. As a part of the service’s broader modernization, these are additionally present process upgrades, with the KF-16 being delivered to the Block 70 commonplace and the F-15K being delivered to a configuration much like the F-15EX Eagle II.
Block 2’s Improvement
Whereas the Block 1 configuration focuses on air superiority duties, improvement of the KF-21 Block 2 variant with expanded air-to-ground capabilities is already underway. As we beforehand reported right here at The Aviationist, KAI and DAPA have been advancing plans to increase the plane’s mission set to incorporate air-to-ground and reconnaissance roles.
Yonhap Information Company reported that, in December 2025, KAI secured a ₩686 billion ($465 million) contract particularly aimed toward growing the KF-21’s strike capabilities. A video additionally confirmed that pit drop testing has already began, with the GBU-12 Laser-Guided Bomb (LGB), GBU-56 Laser Joint Direct Assault Munition (LJDAM) and Korean Air-Launched Cruise Missile (KALCM) among the many weapons proven.
The KF-21 includes a most payload capability of roughly 7,700 kg (17,000 lb), offering ample margin for a broad vary of weapons and shops, with ten totally different munitions reportedly eyed. DAPA has additionally adjusted this system timeline, transferring air-to-ground weapons exams ahead to the primary half of 2027, in comparison with the earlier schedule that focused late 2028.
The preliminary air-to-ground functionality is anticipated to be achieved roughly 18 months sooner than the unique venture plan, and will likely be utilized to mass-produced KF-21 plane beginning in 2027. Presently, design, verification, and floor testing for air-to-ground weapons flight testing have been accomplished, based on experiences.
Block 3’s Plans
The long run Block 3 plane is envisaged to be a pure stealth fighter with radar-absorbent materials, paint and coatings, inside weapons bays, sensor fusion and licensed to function with Collaborative Fight Plane (CCA). Some experiences additionally referred to as the brand new variant as KF-21EX.
For the brand new variant, DAPA launched an Superior Aviation Engine Improvement Venture aiming to ship an influence plant that will produce 16,000 kilos of dry thrust and 24,000 kilos of thrust with afterburners. The brand new engine is anticipated to be built-in on the KF-21 Block 3 by 2040 and exchange the present Common Electrical F414, which Hanwha Aerospace manufactures domestically underneath license.
Different adjustments introduced with the Block 3 could be a brand new profile for the cockpit’s cover, a sensor under the nostril much like the F-35’s EOTS, new nostril radome, upgraded digital warfare capabilities and antennas. Its anticipated introduction date nevertheless isn’t but clear.
Unsure Export Prospects
Regardless of progress, the KF-21 has but to safe its first confirmed worldwide order. Whereas the fielding of an indigenous fighter to exchange growing older platforms is the main focus, export can also be thought-about a excessive precedence by the South Korean authorities.
Indonesia continues to be formally concerned in this system as an investor, with long-standing plans to amass the plane and take part in its manufacture. Nonetheless, as reported on different events, the partnership has been strained by delayed funds and a discount in Jakarta’s monetary contribution.
Notably, based on South Korean media, Indonesia will not obtain the fifth prototype for native flight testing and weapons integration, as initially deliberate. Furthermore, Indonesia has but to signal a contract for the acquisition of the brand new fighter.
A possible export buyer which not too long ago emerged is the Philippines, which is reportedly in talks to amass between 12 and 24 KF-21s. This seems to have prompted pressing negotiations by Indonesia to keep away from falling behind within the manufacturing queue, with talks concerning the acquisition of 16 KF-21 Block 2 jets.
Different potential clients talked about in latest experiences point out Poland, Malaysia, Peru, and the United Arab Emirates. Discussions with a few of these nations are reportedly ongoing, with the Polish Air Drive Chief additionally flying on the KF-21, however no contracts have but been introduced.
