of the 1928 and 12 in 1929. The Fizir F1V aircraft used by the pilot schools were withdrawn from service and replaced with the new Zmaj Fizir FP-2 in 1936. Some examples of these aircraft had flown by the beginning of April and were still in use when war started in 1941 as a liaison aircraft or training. Last flight from the family of these types of aircraft Fizir F1M (Fizir first Navy) was a seaplane that was developed at "Zmaj" by Zemun on the request of the Navy Command for a reconnaissance seaplane on floats. 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. On one of these aircraft was fitted with an NACA ring in 1931 to improve the Jupiter engine's cooling and reduce drag. These aircraft flew during the war and three were captured by the Italians however it is unknown if they made any use of them. Operators Yugoslav Royal Air Force Yugoslav Royal Navy Air Force of the Independent State of Croatia (5 ex-Yugoslav Royal Air Force examples) Variants Fizir F1 – Prototype with a Maybach Mb.IVa (1 example, 1925) Fizir F1V-Maybach – Maybach Mb.IVa (32 examples, 1928) Fizir F1V-Loren – Lorraine-Dietrich 12Eb W-12 engine (1st prototype converted 1928 + 15 Lorraine conversion Maybach 12 dB 400KS in 1933) Fizir F1V-Hispano – Hispano-Suiza 12G V-12 engine, (1 prototype converted in 1928) Fizir F1V-Wright – Wright Whirlwind J-5 radial engine, (1 prototype and 15 production examples in 1930) Fizir F1M-Jupiter – a naval seaplane (also called "The Great Fizir") with Gnome-Rhône 9A / IAM 9AD radial engine (5 examples in 1930) Fizir F1G-Castor – Walter Castor 7 cylinder radial engine, (1 prototype in 1931) Fizir F1G-Titan – Bristol Titan 7-cylinder radial engine, (1 prototype in 1931) Specifications (F1V-Maybach) See also Notes References External links Images of Fizir aircraft airserbia.com Fizir F1V i Fizir F1M Zmaj aircraft Rogožarski aircraft 1930s Yugoslav military aircraft Reconnaissance Trainer aircraft Biplanes Single-engined tractor aircraft Aircraft first flown in 1925