DJORDJE NIKOLIC was born in Belgrade, Serbia, coincidentally on National Aviation Day. Since early childhood he has been fascinated by all aviation-related matters, always staring up in the sky and regularly visiting aviation themed museums across Europe. His interests are primarily in the Royal Yugoslav Air Force and the history of Belgrade in the period between the two world wars and his collection includes hundreds of original photographs, documents, pilot logbooks and other memorabilia. Djordje graduated in mechanical engineering from the University of Applied Sciences in Aachen, Germany. Having completed his studies in the German language, he was able to research and interpret historical documents relating to the German aircraft in Yugoslav service in the interwar and Second World War period. He is also an avid aircraft modeler and regularly attends local and national shows and contests. Djordje currently resides in Washington State, USA.
OGNJAN PETROVIĆ was born in Kruševac, Serbia. He graduated in mechanical engineering and has worked for 30 years at the Development bureau of the ‘Process equipment’ factory in Kruševac at various design related activities. In 1968 he began researching history of Serbian and Yugoslav aviation and starting in 1982 he published his first articles and drawings in both domestic and international aviation magazines. He has authored over 1200 technical drawings and color profiles of Serbian and Yugoslav aircraft and has written over 160 scientific, research and historical articles. Additionally, he has illustrated numerous books and articles for fellow authors and has co-authored several aviation books. Also, he was the author of several aviation history exhibitions and catalogues. Ognjan currently resides in Kruševac, Serbia.
