Yugoslav Air Force (postwar) The Kaproni Bulgarski KB-11 Fazan (English: Pheasant) was a 1940s Bulgarian army liaison and utility monoplane built by Kaproni Bulgarski, a subsidiary of the Italian aviation conglomerate Società Italiana Caproni.

The prototype Fazan flew in 1941 as a shoulder-wing monoplane powered by a 750 hp (559 kW) Alfa Romeo 126 R.C.34 radial engine.

By analogy with the Hunchback of Notre-Dame, the prototype gaining the unflattering nickname "Quasimodo".

This took advantage of the availability of large quantities of PZL-license built Bristol Pegasus engines that had been captured by the Germans during the Invasion of Poland, with a Pegasus XXI driving a two-bladed wooden propeller replacing the Alfa-Romeo, while the fuselage glazing was changed again.

KB-11 equipped units saw only limited use in this offensive, possibly because of the aircraft's similarity to the German Henschel Hs 126.