After the war, he designed and built his first airplane and a few other aircraft inside a converted saw mill which he had rented. He used aircraft engines he had acquired during World War I to power these planes. In 1924 he built a military aircraft from scratch in Izmir, Vecihi K-VI, which made its first flight on 28 January 1925. In 1930 he constructed a speedboat (Vecihi-SK-X) and a civilian aircraft (Vecihi K-XIV) in Kadıköy, Istanbul, followed by a seaplane in 1933.