Fizir F1
One Fizir F1 prototype built by Aeroplanska Radionica 1. VP at Novi Sad and delivered in late 1925. 260 hp Maybach MbIVa engine. Thirty-two F1V transition trainers built by Rogozarki from late 1927 to late 1929. Same engine as the prototype. In 1928 two production aircraft were experimentally re-engined with 450 hp Lorraine-Dietrich 12Eb and 450 hp Hispano-Suiza 12Ga engines respectively. In 1929 a new protype with a 220 hp Wright Whirlwind J-5 engine was built at Rogozarski. Fifteen F1V versions were then built by Zmaj in 1930 with the Whirlwind engine. Two F1G versions built by Rogozarski in 1931, with 230 hp Walter Titan and 240 hp Walter Castor engines respectively. Used as advanced trainers. In 1933 fifteen surviving F1Vs were re-engined with the 400 hp Lorraine-Dietrich 12Db. Most withdrawn from service in 1936, but several Whirlwind-engined F1Vs remained in service, with at least one surviving until the April 1941 war.

Serial	c/no.	Prev. Identity	Delivered	Fate/Notes
			1925	F1 prototype
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1927	F1V
			1929	F1V Whirlwind prototype
			1930	F1V
			1930	F1V
			1930	F1V
			1930	F1V
			1930	F1V
			1930	F1V
			1930	F1V
			1930	F1V
			1930	F1V
			1930	F1V
			1930	F1V
			1930	F1V
			1930	F1V
			1930	F1V
			1930	F1V
			1931	F1G Titan, wfu 1938
			1931	F1G Castor, wfu 1936

References:

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