Tadeusz Chylińnski (13 October 1911 in Warsaw – 15 February 1978 in Warsaw) – was a Polish airplane designer and constructor, a researcher at the Institute of Aviation in Warsaw and specialist in aircraft structures. Before World War II Chyliński was the son of Stanisław Kazimierz and Zofia J. née Tuszowski. In 1920, went to the Muszyński School in Warsaw. After a year he moved to Milanówek (suburb of Warsaw), where his parents bought the "Afrykanka" (literally: African woman) estate, and where he attended the coeducational Classical High School. In 1926, he returned to Warsaw to continue his education in the school of Ludwik Lorentz "Lorencowka", from which he graduated in 1930. He began studies at the University of Warsaw, but in 1931 he moved to the Mechanical Division of the Warsaw University of Technology and its aeronautical school. During his studies, he obtained a glider pilot license in Sokola Góra near Krzemieniec. He practiced in Yugoslavia as well. At the same time, he obtained a Bachelor's degree in the Aeronautical Section of Warsaw Tech's Mechanical Department. During the years 1936-1937, he passed his military training in the pre-officer school of Artillery in Wlodzimierz Wolynski, 5th battery, obtaining the grade of Cadet Second Class with Diploma of Artillery. In 1937, he began to work at the Experimental Aeronautical Workshops (Doświadczalne Warsztaty Lotnicze) RWD at the Okęcie airport in Warsaw as an aircraft constructor, continuing his studies in the same time. In the fall of that year he married Alina Dabkowska. He prepared at that time the technical documentation of the reconnaissance plane RWD-14 Czapla. In 1938, he began, along with Jerzy Drzewiecki, design work on the high-performance experimental airplane RWD-19, for which Chyliński constructed its wings. By October 1938 the aircraft had undergone flight tests. His next projects comprised the following projects: fuselage of the auxiliary-use aircraft RWD-18, base mount for the engine of the trainer RWD-23, and the wing longeron for the fighter RWD-25. Chyliński was responsible for working on construction and documentation for these planes. From 1933 to 1938, he was a member of the Avionic Section of the Mechanical Circle of the Warsaw Technical University Students. World War II In 1939, he was drafted into the Army, and served first in the 5th Light Artillery Regiment (PAL) in Toruń, next in the 8th PAL of Płock, where he defended his country during the German invasion of Poland