01/31/2011. Remarks by Johan Visschedijk: "Development of the three-seat Kurir (Courier) was started in the mid-1950s by a team led by the Engineers Borisa Cijana and Dorde Petković. (The name Borisa Cijana has been 'westernized' to Boris Cijan, and the type is also referred to as the Cijan Kurir). Of metal construction and a fabric-covered tail section the Kurir was designed for liaison, ambulance, transport and other duties within the Yugoslav AF, but also for use by aero clubs.
The prototype was first flown in 1955, and a number of engines have been used in the 145 to 167 Kurirs (depending on the source) that were produced at the Tvornica Aero i Hydroplana Ikarus factory at Zenum, Belgrade, between 1958 and 1961. The Kurir DM-6R was powered by DM-6R six-cylinder in-line inverted air-cooled engine, the Kurir L was powered by an 185 hp Lycoming O-435-1 six-cylinder horizontally-opposed air-cooled engine, while the Kurir W designation indicated the use of an 160 hp Walter JW6-IIIR Minor six-cylinder in-line inverted air-cooled engine.
The fifth Kurir produced was completed as the Kurir H (Hidrokurir, Hydrocourier), the twin-float seaplane differed from the prototype in several other respects. In particular the wing was raised above the top line of the fuselage, and was braced by a single streamline-section strut on each side. The fuselage was deepened and the engine cowling lines modified. In military livery and serialed 50005, the Kurir H was first flown from the Danube on September 20, 1958. Due to lack of funds, the Kurir H was not taken into production, the sole example was written off at Divulje on February 25, 1960."