1950 ., a delta wing, art, battle, braking, by plane, danijel frka, danijel frka., distribution, fighter, first, is the, issued, middle, mig- 21, mk. i, multi-purpose, parachute, plane, planting, reconnaissance, seaplane, soviet, supermarine, supersonic, the, the world, wahlroos, walrus, was the, ww2.