Rudolf Fizir designed a biplane reconnaissance aircraft during the first war of the Kingdom of Yugoslavia (KSHS) during 1925.

It was equipped with a 260 hp Maybach engine and the prototype was made in the workshop of the Novi Sad Air Aviation Regiment.

Zmaj was also responsible for conversion of several Fizir-Maybach trainers to Lorraine-Dietrich engines in 1932, which extended the service life of these machines under the new name Fizir-Lorraine 400 hp.

The Fizir F1V was used at the flying schools to transition pupils to reconnaissance and bomber aircraft, replacing the worn-out Hansa-Brandenburg C.I as production permitted.

Known as Zmaj Fizir-Jupiter or "Big Fizir" they were used in the Naval Air Force for as a reconnaissance seaplane and for towing targets for antiaircraft training.