Rank 77 documents the KAI KF-21 Boramae — South Korea's 4.5-generation twin-engine fighter that made first flight in July 2022 and entered ROKAF evaluation with Block 1 airframes carrying Meteor and IRIS-T missiles under a delta-canard planform deliberately short of full stealth. Boramae — young hawk in Korean — reflects a KFX programme seeded after Indonesia joined as development partner and Lockheed Martin consulting kept the design exportable to US allies. Powered by twin GE F414 engines with domestic production planned, the KF-21 bridges ROKAF F-35A stealth squadrons and ageing F-4/F-5 fleets with a locally assembled backbone fighter. Split-view blueprint art renders the Taegeuk roundel exterior and twin-engine wireframe exactly as the master PNG dictates.