Proto 2 was a training biplane manufactured at the Fabrica de avioane Astra in Arad in 1924.

The airplane kept the original design, but as a safety measure, the structure of the wings was strengthened by increasing the section of the spars and adding another pair of interplane struts.

[2] After these improvements were made, the Astra Factory built 25 aircraft.

The airplanes were then supplied to the Ministry of War, which assigned them to the Military Flying School of Tecuci.

[2] Data from Romanian Aeronautical Constructions 1905-1974[2]General characteristics Performance