Rogožarski IK-3
The Rogožarski IK-3 was a 1930s Yugoslav monoplane single-seat fighter, designed by Ljubomir Ilić, Kosta Sivčev and Slobodan Zrnić as a successor to the Ikarus IK-2 fighter. Its armament consisted of a hub-firing 20 mm (0.79 in) autocannon and two fuselage-mounted synchronised machine guns.