Upon his return to Yugoslavia, is hard at work, and aircraft that made the project was named SIM-II.

The prototype was developed in the aircraft factory in Belgrade "S. Vlajković and Sons", directed by the private constructor and with the financial help of his brother while the motor Siemens Sh-14 100 hp purchased on credit.

Landing gear was fixed with elastic legs and depreciation is carried out using rubber blocks.

[1] While the plane was not accepted for military service command YRAF bought and gave him a prototype flight school of the Association of Reserve airmen.

Машинство (-{YU}--Београд: Савез инжењера и техничара Југославије) 31: 1867 - 1876.General characteristics Performance